diff --git a/.gitignore b/.gitignore
index 460a9f4dcfc..b260676a76a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -24,6 +24,8 @@ coverage
 packages/router-generator/tests/**/*.gen.ts
 packages/router-generator/tests/**/*.gen.js
 e2e/**/port*.txt
+test-results/
+**/test-results/
 
 # misc
 .DS_Store
@@ -79,3 +81,6 @@ vite.config.ts.timestamp_*
 **/llms
 
 **/.tanstack
+
+# Claude Code settings
+.claude/
diff --git a/packages/router-plugin/src/core/code-splitter/compilers.ts b/packages/router-plugin/src/core/code-splitter/compilers.ts
index 43b8c8db4f6..cab7ac309f9 100644
--- a/packages/router-plugin/src/core/code-splitter/compilers.ts
+++ b/packages/router-plugin/src/core/code-splitter/compilers.ts
@@ -81,16 +81,34 @@ function addSplitSearchParamToFilename(
 ) {
   const [bareFilename] = filename.split('?')
 
+  // Don't modify absolute paths - they're used internally by bundlers
+  // Only ensure relative import specifier for relative paths
+  const relativeFilename =
+    bareFilename!.startsWith('/') || // Unix absolute path
+    /^[a-zA-Z]:/.test(bareFilename!) || // Windows absolute path (C:\ or C:/)
+    bareFilename!.startsWith('./') ||
+    bareFilename!.startsWith('../')
+      ? bareFilename!
+      : `./${bareFilename!}`
+
   const params = new URLSearchParams()
   params.append(tsrSplit, createIdentifier(grouping))
 
-  const result = `${bareFilename}?${params.toString()}`
+  const result = `${relativeFilename}?${params.toString()}`
   return result
 }
 
 function removeSplitSearchParamFromFilename(filename: string) {
   const [bareFilename] = filename.split('?')
-  return bareFilename!
+
+  // Don't modify absolute paths - they're used internally by bundlers
+  // Only ensure relative import specifier for relative paths
+  return bareFilename!.startsWith('/') || // Unix absolute path
+    /^[a-zA-Z]:/.test(bareFilename!) || // Windows absolute path (C:\ or C:/)
+    bareFilename!.startsWith('./') ||
+    bareFilename!.startsWith('../')
+    ? bareFilename!
+    : `./${bareFilename!}`
 }
 
 const splittableCreateRouteFns = ['createFileRoute']
@@ -103,6 +121,31 @@ const allCreateRouteFns = [
   ...unsplittableCreateRouteFns,
 ]
 
+/**
+ * Helper to check if a VariableDeclarator is at module level.
+ * Handles both:
+ * - `const x = ...` (Program > VariableDeclaration > VariableDeclarator)
+ * - `export const x = ...` (Program > ExportNamedDeclaration > VariableDeclaration > VariableDeclarator)
+ */
+function isTopLevelVarDecl(
+  declaratorPath: babel.NodePath<t.VariableDeclarator>,
+): boolean {
+  const varDecl = declaratorPath.parentPath
+  if (!varDecl.isVariableDeclaration()) return false
+
+  const parent = varDecl.parentPath
+
+  // Direct: Program > VariableDeclaration
+  if (parent.isProgram()) return true
+
+  // Exported: Program > ExportNamedDeclaration > VariableDeclaration
+  if (parent.isExportNamedDeclaration() && parent.parentPath.isProgram()) {
+    return true
+  }
+
+  return false
+}
+
 export function compileCodeSplitReferenceRoute(
   opts: ParseAstOptions & {
     codeSplitGroupings: CodeSplitGroupings
@@ -111,6 +154,7 @@ export function compileCodeSplitReferenceRoute(
     filename: string
     id: string
     addHmr?: boolean
+    sharedExports?: Set<string>
   },
 ): GeneratorResult | null {
   const ast = parseAst(opts)
@@ -118,6 +162,7 @@ export function compileCodeSplitReferenceRoute(
   const refIdents = findReferencedIdentifiers(ast)
 
   const knownExportedIdents = new Set<string>()
+  const sharedModuleLevelIdents = new Set<string>()
 
   function findIndexForSplitNode(str: string) {
     return opts.codeSplitGroupings.findIndex((group) =>
@@ -165,6 +210,52 @@ export function compileCodeSplitReferenceRoute(
                 return programPath.scope.hasBinding(name)
               }
 
+              // Helper to collect all identifiers referenced by a node
+              const collectReferencedIdentifiers = (
+                propPath: babel.NodePath<t.ObjectProperty>,
+              ): Set<string> => {
+                const identifiers = new Set<string>()
+                const valuePath = propPath.get('value')
+
+                // If the value is an identifier, we need to follow it to its definition
+                const pathsToAnalyze: Array<babel.NodePath> = []
+
+                if (valuePath.isIdentifier()) {
+                  const binding = valuePath.scope.getBinding(
+                    valuePath.node.name,
+                  )
+                  if (binding) {
+                    pathsToAnalyze.push(binding.path)
+                  }
+                } else {
+                  pathsToAnalyze.push(valuePath)
+                }
+
+                // Traverse each path to find all referenced identifiers
+                pathsToAnalyze.forEach((analyzePath) => {
+                  analyzePath.traverse({
+                    Identifier(idPath) {
+                      // Only collect identifiers that are references (not declarations)
+                      if (!idPath.isReferencedIdentifier()) return
+
+                      const name = idPath.node.name
+                      // Use idPath.scope to properly handle shadowing
+                      const binding = idPath.scope.getBinding(name)
+
+                      // Only include identifiers that are defined at module level
+                      if (binding && binding.path.isVariableDeclarator()) {
+                        // Use the helper to check for top-level (handles both direct and exported)
+                        if (isTopLevelVarDecl(binding.path)) {
+                          identifiers.add(name)
+                        }
+                      }
+                    },
+                  })
+                })
+
+                return identifiers
+              }
+
               if (t.isObjectExpression(routeOptions)) {
                 if (opts.deleteNodes && opts.deleteNodes.size > 0) {
                   routeOptions.properties = routeOptions.properties.filter(
@@ -191,6 +282,43 @@ export function compileCodeSplitReferenceRoute(
                   // exit traversal so this route is not split
                   return programPath.stop()
                 }
+
+                // First pass: collect identifiers used by split vs non-split properties
+                const splitPropertyIdents = new Set<string>()
+                const nonSplitPropertyIdents = new Set<string>()
+
+                // We need to analyze the route options object to find shared identifiers
+                // Since routeOptions might be a resolved node, we traverse from programPath
+                // to find all ObjectProperty paths and analyze them
+                programPath.traverse({
+                  ObjectProperty(propPath) {
+                    // Check if this property belongs to the route options by checking its parent
+                    if (!t.isObjectExpression(propPath.parent)) return
+                    if (propPath.parent !== routeOptions) return
+                    if (!t.isIdentifier(propPath.node.key)) return
+
+                    const key = propPath.node.key.name
+                    const willBeSplit =
+                      findIndexForSplitNode(key) !== -1 &&
+                      SPLIT_NODES_CONFIG.has(key as any)
+
+                    const idents = collectReferencedIdentifiers(propPath)
+
+                    if (willBeSplit) {
+                      idents.forEach((id) => splitPropertyIdents.add(id))
+                    } else {
+                      idents.forEach((id) => nonSplitPropertyIdents.add(id))
+                    }
+                  },
+                })
+
+                // Find shared identifiers that need to be exported
+                splitPropertyIdents.forEach((ident) => {
+                  if (nonSplitPropertyIdents.has(ident)) {
+                    sharedModuleLevelIdents.add(ident)
+                  }
+                })
+
                 routeOptions.properties.forEach((prop) => {
                   if (t.isObjectProperty(prop)) {
                     if (t.isIdentifier(prop.key)) {
@@ -423,6 +551,116 @@ export function compileCodeSplitReferenceRoute(
             },
           })
         }
+
+        /**
+         * Export shared module-level variables that are used by both
+         * split properties (e.g., component) and non-split properties (e.g., loader)
+         * This prevents double initialization when the split file is loaded
+         */
+        if (sharedModuleLevelIdents.size > 0) {
+          modified = true
+
+          // Track which variable declarations we've already processed to avoid duplicate processing
+          const processedVarDecls = new Set<
+            babel.NodePath<t.VariableDeclaration>
+          >()
+
+          sharedModuleLevelIdents.forEach((identName) => {
+            const binding = programPath.scope.getBinding(identName)
+            if (!binding) return
+
+            const bindingPath = binding.path
+
+            // Check if it's a variable declaration at the top level
+            // (handles both `const x = ...` and `export const x = ...`)
+            if (
+              bindingPath.isVariableDeclarator() &&
+              isTopLevelVarDecl(bindingPath)
+            ) {
+              const varDecl =
+                bindingPath.parentPath as babel.NodePath<t.VariableDeclaration>
+
+              // Only export const/let declarations (not imports or functions)
+              if (
+                varDecl.node.kind === 'const' ||
+                varDecl.node.kind === 'let'
+              ) {
+                // Skip if we've already processed this declaration
+                if (processedVarDecls.has(varDecl)) {
+                  return
+                }
+                processedVarDecls.add(varDecl)
+
+                // If already exported, just track it - don't re-export
+                if (varDecl.parentPath.isExportNamedDeclaration()) {
+                  knownExportedIdents.add(identName)
+                  opts.sharedExports?.add(identName)
+                  return
+                }
+
+                // Check if this declaration has multiple declarators
+                const declarators = varDecl.node.declarations
+                if (declarators.length > 1) {
+                  // Split declarators: shared ones get exported, others stay local
+                  const sharedDeclarators: Array<t.VariableDeclarator> = []
+                  const localDeclarators: Array<t.VariableDeclarator> = []
+
+                  declarators.forEach((declarator) => {
+                    if (
+                      t.isIdentifier(declarator.id) &&
+                      sharedModuleLevelIdents.has(declarator.id.name)
+                    ) {
+                      sharedDeclarators.push(declarator)
+                      knownExportedIdents.add(declarator.id.name)
+                      opts.sharedExports?.add(declarator.id.name)
+                    } else {
+                      localDeclarators.push(declarator)
+                    }
+                  })
+
+                  // Replace with split declarations
+                  if (
+                    sharedDeclarators.length > 0 &&
+                    localDeclarators.length > 0
+                  ) {
+                    // Both shared and local declarators
+                    const localVarDecl = t.variableDeclaration(
+                      varDecl.node.kind,
+                      localDeclarators,
+                    )
+                    const sharedVarDecl = t.variableDeclaration(
+                      varDecl.node.kind,
+                      sharedDeclarators,
+                    )
+                    const exportDecl = t.exportNamedDeclaration(
+                      sharedVarDecl,
+                      [],
+                    )
+
+                    varDecl.replaceWithMultiple([localVarDecl, exportDecl])
+                  } else if (sharedDeclarators.length > 0) {
+                    // All declarators are shared
+                    const sharedVarDecl = t.variableDeclaration(
+                      varDecl.node.kind,
+                      sharedDeclarators,
+                    )
+                    const exportDecl = t.exportNamedDeclaration(
+                      sharedVarDecl,
+                      [],
+                    )
+                    varDecl.replaceWith(exportDecl)
+                  }
+                } else {
+                  // Single declarator - export the whole thing
+                  const exportDecl = t.exportNamedDeclaration(varDecl.node, [])
+                  varDecl.replaceWith(exportDecl)
+                  knownExportedIdents.add(identName)
+                  opts.sharedExports?.add(identName)
+                }
+              }
+            }
+          })
+        }
       },
     },
   })
@@ -463,6 +701,7 @@ export function compileCodeSplitVirtualRoute(
   opts: ParseAstOptions & {
     splitTargets: Array<SplitRouteIdentNodes>
     filename: string
+    sharedExports?: Set<string>
   },
 ): GeneratorResult {
   const ast = parseAst(opts)
@@ -762,6 +1001,121 @@ export function compileCodeSplitVirtualRoute(
             }
           },
         })
+
+        // Import shared module-level variables that were exported in the reference file
+        // Only process variables confirmed to be in the sharedExports set
+        if (opts.sharedExports && opts.sharedExports.size > 0) {
+          const candidateVariables: Array<string> = []
+          const reassignedVariables = new Set<string>()
+
+          // First pass: find candidate variables to import
+          programPath.traverse({
+            VariableDeclaration(varDeclPath) {
+              // Only process top-level const/let declarations
+              if (!varDeclPath.parentPath.isProgram()) return
+              if (
+                varDeclPath.node.kind !== 'const' &&
+                varDeclPath.node.kind !== 'let'
+              )
+                return
+
+              varDeclPath.node.declarations.forEach((declarator) => {
+                if (!t.isIdentifier(declarator.id)) return
+
+                const varName = declarator.id.name
+
+                // Only import if this variable is in the confirmed shared exports set
+                if (opts.sharedExports!.has(varName)) {
+                  candidateVariables.push(varName)
+                }
+              })
+            },
+          })
+
+          // Second pass: detect reassignments/updates to candidate variables
+          // Reassigned imports produce invalid ESM, so we must skip them
+          programPath.traverse({
+            AssignmentExpression(path) {
+              if (t.isIdentifier(path.node.left)) {
+                const name = path.node.left.name
+                if (candidateVariables.includes(name)) {
+                  reassignedVariables.add(name)
+                }
+              }
+            },
+            UpdateExpression(path) {
+              if (t.isIdentifier(path.node.argument)) {
+                const name = path.node.argument.name
+                if (candidateVariables.includes(name)) {
+                  reassignedVariables.add(name)
+                }
+              }
+            },
+          })
+
+          // Warn about reassigned variables and filter them out
+          if (reassignedVariables.size > 0) {
+            const varList = Array.from(reassignedVariables).join(', ')
+            console.warn(
+              `[tanstack-router] Cannot import shared variable(s) [${varList}] in "${opts.filename}" because they are reassigned in the split file. ` +
+                `Imported bindings are read-only in ESM. Consider using 'const' with an object and mutating properties instead of reassigning the binding.`,
+            )
+          }
+
+          // Only import variables that are not reassigned
+          const variablesToImport = candidateVariables.filter(
+            (name) => !reassignedVariables.has(name),
+          )
+
+          // Remove shared variable declarations and add imports
+          if (variablesToImport.length > 0) {
+            programPath.traverse({
+              VariableDeclaration(varDeclPath) {
+                if (!varDeclPath.parentPath.isProgram()) return
+
+                const declaratorsToKeep = varDeclPath.node.declarations.filter(
+                  (declarator) => {
+                    if (!t.isIdentifier(declarator.id)) return true
+                    return !variablesToImport.includes(declarator.id.name)
+                  },
+                )
+
+                if (declaratorsToKeep.length === 0) {
+                  varDeclPath.remove()
+                } else if (
+                  declaratorsToKeep.length <
+                  varDeclPath.node.declarations.length
+                ) {
+                  varDeclPath.node.declarations = declaratorsToKeep
+                }
+              },
+            })
+
+            // Add import statement for shared variables
+            const importDecl = t.importDeclaration(
+              variablesToImport.map((name) =>
+                t.importSpecifier(t.identifier(name), t.identifier(name)),
+              ),
+              t.stringLiteral(
+                removeSplitSearchParamFromFilename(opts.filename),
+              ),
+            )
+            programPath.unshiftContainer('body', importDecl)
+
+            // Track imported identifiers for dead code elimination
+            const importPath = programPath.get('body')[0] as babel.NodePath
+            importPath.traverse({
+              Identifier(identPath) {
+                if (
+                  identPath.parentPath.isImportSpecifier() &&
+                  identPath.key === 'local'
+                ) {
+                  refIdents.add(identPath)
+                }
+              },
+            })
+          }
+        }
       },
     },
   })
diff --git a/packages/router-plugin/src/core/router-code-splitter-plugin.ts b/packages/router-plugin/src/core/router-code-splitter-plugin.ts
index 2fe2af28b37..28b9e80460e 100644
--- a/packages/router-plugin/src/core/router-code-splitter-plugin.ts
+++ b/packages/router-plugin/src/core/router-code-splitter-plugin.ts
@@ -66,6 +66,10 @@ export const unpluginRouterCodeSplitterFactory: UnpluginFactory<
   let ROOT: string = process.cwd()
   let userConfig: Config
 
+  // Cache of shared module-level variables that were exported in reference files
+  // Key: base filename (without query params), Value: Set of exported identifier names
+  const sharedExportsCache = new Map<string, Set<string>>()
+
   function initUserConfig() {
     if (typeof options === 'function') {
       userConfig = options()
@@ -125,6 +129,7 @@ export const unpluginRouterCodeSplitterFactory: UnpluginFactory<
     const splitGroupings: CodeSplitGroupings =
       fromCode.groupings || pluginSplitBehavior || getGlobalCodeSplitGroupings()
 
+    const sharedExports = new Set<string>()
     const compiledReferenceRoute = compileCodeSplitReferenceRoute({
       code,
       codeSplitGroupings: splitGroupings,
@@ -136,8 +141,15 @@ export const unpluginRouterCodeSplitterFactory: UnpluginFactory<
         : undefined,
       addHmr:
         (userConfig.codeSplittingOptions?.addHmr ?? true) && !isProduction,
+      sharedExports,
     })
 
+    // Cache shared exports for virtual route compilation
+    if (sharedExports.size > 0) {
+      const baseFilename = id.split('?')[0]!
+      sharedExportsCache.set(baseFilename, sharedExports)
+    }
+
     if (compiledReferenceRoute === null) {
       if (debug) {
         console.info(
@@ -176,10 +188,15 @@ export const unpluginRouterCodeSplitterFactory: UnpluginFactory<
       splitRouteIdentNodes.includes(p as any),
     ) as Array<SplitRouteIdentNodes>
 
+    // Get shared exports from cache for this route
+    const baseFilename = id.split('?')[0]!
+    const sharedExports = sharedExportsCache.get(baseFilename)
+
     const result = compileCodeSplitVirtualRoute({
       code,
       filename: id,
       splitTargets: grouping,
+      sharedExports,
     })
 
     if (debug) {
diff --git a/packages/router-plugin/tests/code-splitter.test.ts b/packages/router-plugin/tests/code-splitter.test.ts
index 6edf37b5f12..8fb0bb4da4c 100644
--- a/packages/router-plugin/tests/code-splitter.test.ts
+++ b/packages/router-plugin/tests/code-splitter.test.ts
@@ -52,12 +52,16 @@ describe('code-splitter works', () => {
         const dirs = getFrameworkDir(framework)
         const filenames = await readdir(dirs.files)
 
+        // Cache for shared exports per filename
+        const sharedExportsCache = new Map<string, Set<string>>()
+
         it.each(filenames)(
           `should compile "reference" for "%s"`,
           async (filename) => {
             const file = await readFile(path.join(dirs.files, filename))
             const code = file.toString()
 
+            const sharedExports = new Set<string>()
             const compileResult = compileCodeSplitReferenceRoute({
               code,
               filename,
@@ -65,8 +69,14 @@ describe('code-splitter works', () => {
               addHmr: false,
               codeSplitGroupings: grouping,
               targetFramework: framework,
+              sharedExports,
             })
 
+            // Cache shared exports for virtual compilation
+            if (sharedExports.size > 0) {
+              sharedExportsCache.set(filename, sharedExports)
+            }
+
             await expect(compileResult?.code || code).toMatchFileSnapshot(
               path.join(dirs.snapshots, groupName, filename),
             )
@@ -79,6 +89,9 @@ describe('code-splitter works', () => {
             const file = await readFile(path.join(dirs.files, filename))
             const code = file.toString()
 
+            // Get shared exports from cache
+            const sharedExports = sharedExportsCache.get(filename)
+
             for (const targets of grouping) {
               const ident = createIdentifier(targets)
 
@@ -86,6 +99,7 @@ describe('code-splitter works', () => {
                 code,
                 filename: `${filename}?${ident}`,
                 splitTargets: targets,
+                sharedExports,
               })
 
               const snapshotFilename = path.join(
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-alias-chain.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-alias-chain.tsx
new file mode 100644
index 00000000000..4395b7a5bc4
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-alias-chain.tsx
@@ -0,0 +1,17 @@
+console.warn("[tanstack-router] These exports from \"shared-alias-chain.tsx\" will not be code-split and will increase your bundle size:\n- alias\nFor the best optimization, these items should either have their export statements removed, or be imported from another location that is not a route file.");
+const $$splitComponentImporter = () => import('shared-alias-chain.tsx?tsr-split=component');
+import { lazyRouteComponent } from '@tanstack/react-router';
+import { createFileRoute } from '@tanstack/react-router';
+
+// Alias chain - ensure we track through aliases
+const base = {
+  name: 'collection',
+  items: []
+};
+export const alias = base;
+export const Route = createFileRoute('/test')({
+  loader: async () => {
+    return alias.items;
+  },
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-alias-chain@component.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-alias-chain@component.tsx
new file mode 100644
index 00000000000..e2a6512a1f5
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-alias-chain@component.tsx
@@ -0,0 +1,5 @@
+import { alias } from "shared-alias-chain.tsx"; // Alias chain - ensure we track through aliases
+function TestComponent() {
+  return <div>{alias.name}</div>;
+}
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-alias-chain@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-alias-chain@errorComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-alias-chain@notFoundComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-alias-chain@notFoundComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-already-exported.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-already-exported.tsx
new file mode 100644
index 00000000000..de8ca211ed6
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-already-exported.tsx
@@ -0,0 +1,19 @@
+console.warn("[tanstack-router] These exports from \"shared-already-exported.tsx\" will not be code-split and will increase your bundle size:\n- collection\nFor the best optimization, these items should either have their export statements removed, or be imported from another location that is not a route file.");
+const $$splitComponentImporter = () => import('shared-already-exported.tsx?tsr-split=component');
+import { lazyRouteComponent } from '@tanstack/react-router';
+import { createFileRoute } from '@tanstack/react-router';
+
+// Already exported variable - should not be double-exported
+export const collection = {
+  name: 'todos',
+  preload: async () => {}
+};
+export const Route = createFileRoute('/test')({
+  loader: async () => {
+    await collection.preload();
+    return {
+      data: 'loaded'
+    };
+  },
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-already-exported@component.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-already-exported@component.tsx
new file mode 100644
index 00000000000..63fdb78e140
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-already-exported@component.tsx
@@ -0,0 +1,6 @@
+// Already exported variable - should not be double-exported
+import { collection } from "shared-already-exported.tsx";
+function TestComponent() {
+  return <div>{collection.name}</div>;
+}
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-already-exported@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-already-exported@errorComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-already-exported@notFoundComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-already-exported@notFoundComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-call-expression.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-call-expression.tsx
new file mode 100644
index 00000000000..aefe57dd0bc
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-call-expression.tsx
@@ -0,0 +1,18 @@
+console.warn("[tanstack-router] These exports from \"shared-call-expression.tsx\" will not be code-split and will increase your bundle size:\n- collection\nFor the best optimization, these items should either have their export statements removed, or be imported from another location that is not a route file.");
+const $$splitComponentImporter = () => import('shared-call-expression.tsx?tsr-split=component');
+import { lazyRouteComponent } from '@tanstack/react-router';
+import { createFileRoute } from '@tanstack/react-router';
+
+// Call expression initializers - should still work
+export const collection = {
+  create: (name: string) => ({
+    name,
+    items: []
+  })
+}.create('todos');
+export const Route = createFileRoute('/test')({
+  loader: async () => {
+    return collection.items;
+  },
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-call-expression@component.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-call-expression@component.tsx
new file mode 100644
index 00000000000..281fb56d762
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-call-expression@component.tsx
@@ -0,0 +1,15 @@
+import { collection } from "shared-call-expression.tsx";
+// Call expression initializers - should still work
+
+const query = {
+  from: (table: string) => ({
+    table,
+    filters: []
+  })
+}.from('users');
+function TestComponent() {
+  return <div>
+      {collection.name} - {query.table}
+    </div>;
+}
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-call-expression@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-call-expression@errorComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-call-expression@notFoundComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-call-expression@notFoundComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-destructuring.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-destructuring.tsx
new file mode 100644
index 00000000000..f34d479c35e
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-destructuring.tsx
@@ -0,0 +1,20 @@
+console.warn("[tanstack-router] These exports from \"shared-destructuring.tsx\" will not be code-split and will increase your bundle size:\n- apiUrl\nFor the best optimization, these items should either have their export statements removed, or be imported from another location that is not a route file.");
+const $$splitComponentImporter = () => import('shared-destructuring.tsx?tsr-split=component');
+import { lazyRouteComponent } from '@tanstack/react-router';
+import { createFileRoute } from '@tanstack/react-router';
+
+// Destructuring - ensure we promote the right binding
+const cfg = {
+  apiUrl: 'http://api.com',
+  timeout: 5000
+};
+export const {
+  apiUrl
+} = cfg;
+export const Route = createFileRoute('/test')({
+  loader: async () => {
+    // Uses the destructured binding
+    return fetch(apiUrl).then(r => r.json());
+  },
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-destructuring@component.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-destructuring@component.tsx
new file mode 100644
index 00000000000..b7ed1ffde9b
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-destructuring@component.tsx
@@ -0,0 +1,13 @@
+// Destructuring - ensure we promote the right binding
+const cfg = {
+  apiUrl: 'http://api.com',
+  timeout: 5000
+};
+const {
+  apiUrl
+} = cfg;
+function TestComponent() {
+  // Also uses the destructured binding
+  return <div>API: {apiUrl}</div>;
+}
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-destructuring@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-destructuring@errorComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-destructuring@notFoundComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-destructuring@notFoundComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-let-reassignment.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-let-reassignment.tsx
new file mode 100644
index 00000000000..4a6a9e24a73
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-let-reassignment.tsx
@@ -0,0 +1,22 @@
+console.warn("[tanstack-router] These exports from \"shared-let-reassignment.tsx\" will not be code-split and will increase your bundle size:\n- store\nFor the best optimization, these items should either have their export statements removed, or be imported from another location that is not a route file.");
+const $$splitComponentImporter = () => import('shared-let-reassignment.tsx?tsr-split=component');
+import { lazyRouteComponent } from '@tanstack/react-router';
+import { createFileRoute } from '@tanstack/react-router';
+
+// let with reassignment - tests live binding behavior
+export let store = {
+  count: 0
+};
+store = {
+  count: 1,
+  updated: true
+};
+export const Route = createFileRoute('/test')({
+  loader: async () => {
+    store.count++;
+    return {
+      data: 'loaded'
+    };
+  },
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-let-reassignment@component.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-let-reassignment@component.tsx
new file mode 100644
index 00000000000..cd88b5634c8
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-let-reassignment@component.tsx
@@ -0,0 +1,12 @@
+// let with reassignment - tests live binding behavior
+let store = {
+  count: 0
+};
+store = {
+  count: 1,
+  updated: true
+};
+function TestComponent() {
+  return <div>Count: {store.count}</div>;
+}
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-let-reassignment@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-let-reassignment@errorComponent.tsx
new file mode 100644
index 00000000000..f52dfd0d532
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-let-reassignment@errorComponent.tsx
@@ -0,0 +1,8 @@
+// let with reassignment - tests live binding behavior
+let store = {
+  count: 0
+};
+store = {
+  count: 1,
+  updated: true
+};
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-let-reassignment@notFoundComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-let-reassignment@notFoundComponent.tsx
new file mode 100644
index 00000000000..f52dfd0d532
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-let-reassignment@notFoundComponent.tsx
@@ -0,0 +1,8 @@
+// let with reassignment - tests live binding behavior
+let store = {
+  count: 0
+};
+store = {
+  count: 1,
+  updated: true
+};
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-module-variable.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-module-variable.tsx
new file mode 100644
index 00000000000..05ad2325f09
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-module-variable.tsx
@@ -0,0 +1,22 @@
+console.warn("[tanstack-router] These exports from \"shared-module-variable.tsx\" will not be code-split and will increase your bundle size:\n- collection\nFor the best optimization, these items should either have their export statements removed, or be imported from another location that is not a route file.");
+const $$splitComponentImporter = () => import('shared-module-variable.tsx?tsr-split=component');
+import { lazyRouteComponent } from '@tanstack/react-router';
+import { createFileRoute } from '@tanstack/react-router';
+
+// Module-level variable used in both loader and component
+// This simulates a collection/query that should only be initialized once
+export const collection = {
+  name: 'todos',
+  preload: async () => {}
+}; // Side effect at module level - should only run once
+console.log('Module initialized:', collection.name);
+export const Route = createFileRoute('/todos')({
+  loader: async () => {
+    // Use collection in loader
+    await collection.preload();
+    return {
+      data: 'loaded'
+    };
+  },
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-module-variable@component.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-module-variable@component.tsx
new file mode 100644
index 00000000000..33cf4220c43
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-module-variable@component.tsx
@@ -0,0 +1,11 @@
+import { collection } from "shared-module-variable.tsx";
+// Module-level variable used in both loader and component
+// This simulates a collection/query that should only be initialized once
+
+// Side effect at module level - should only run once
+console.log('Module initialized:', collection.name);
+function TodosComponent() {
+  // Use collection in component
+  return <div>{collection.name}</div>;
+}
+export { TodosComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-module-variable@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-module-variable@errorComponent.tsx
new file mode 100644
index 00000000000..98f43167ce3
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-module-variable@errorComponent.tsx
@@ -0,0 +1,6 @@
+import { collection } from "shared-module-variable.tsx";
+// Module-level variable used in both loader and component
+// This simulates a collection/query that should only be initialized once
+
+// Side effect at module level - should only run once
+console.log('Module initialized:', collection.name);
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-module-variable@notFoundComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-module-variable@notFoundComponent.tsx
new file mode 100644
index 00000000000..98f43167ce3
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-module-variable@notFoundComponent.tsx
@@ -0,0 +1,6 @@
+import { collection } from "shared-module-variable.tsx";
+// Module-level variable used in both loader and component
+// This simulates a collection/query that should only be initialized once
+
+// Side effect at module level - should only run once
+console.log('Module initialized:', collection.name);
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-multiple-declarations.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-multiple-declarations.tsx
new file mode 100644
index 00000000000..286e452afb7
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-multiple-declarations.tsx
@@ -0,0 +1,16 @@
+console.warn("[tanstack-router] These exports from \"shared-multiple-declarations.tsx\" will not be code-split and will increase your bundle size:\n- collection1\nFor the best optimization, these items should either have their export statements removed, or be imported from another location that is not a route file.");
+const $$splitComponentImporter = () => import('shared-multiple-declarations.tsx?tsr-split=component');
+import { lazyRouteComponent } from '@tanstack/react-router';
+import { createFileRoute } from '@tanstack/react-router';
+
+// Multiple declarations in same const statement
+// Only collection1 is shared, but both are in same declaration
+export const collection1 = {
+  name: 'todos'
+};
+export const Route = createFileRoute('/test')({
+  loader: async () => {
+    return collection1.name;
+  },
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-multiple-declarations@component.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-multiple-declarations@component.tsx
new file mode 100644
index 00000000000..a61b33f2114
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-multiple-declarations@component.tsx
@@ -0,0 +1,12 @@
+import { collection1 } from "shared-multiple-declarations.tsx";
+// Multiple declarations in same const statement
+// Only collection1 is shared, but both are in same declaration
+const collection2 = {
+  name: 'users'
+};
+function TestComponent() {
+  return <div>
+      {collection1.name} {collection2.name}
+    </div>;
+}
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-multiple-declarations@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-multiple-declarations@errorComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-multiple-declarations@notFoundComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-multiple-declarations@notFoundComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-multiple-variables.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-multiple-variables.tsx
new file mode 100644
index 00000000000..c8a354de2c0
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-multiple-variables.tsx
@@ -0,0 +1,24 @@
+console.warn("[tanstack-router] These exports from \"shared-multiple-variables.tsx\" will not be code-split and will increase your bundle size:\n- collection1\n- collection2\nFor the best optimization, these items should either have their export statements removed, or be imported from another location that is not a route file.");
+const $$splitComponentImporter = () => import('shared-multiple-variables.tsx?tsr-split=component');
+import { lazyRouteComponent } from '@tanstack/react-router';
+import { createFileRoute } from '@tanstack/react-router';
+
+// Multiple shared variables used by both loader and component
+export const collection1 = {
+  name: 'todos',
+  preload: async () => {}
+};
+export const collection2 = {
+  name: 'users',
+  preload: async () => {}
+};
+export const Route = createFileRoute('/test')({
+  loader: async () => {
+    await collection1.preload();
+    await collection2.preload();
+    return {
+      data: 'loaded'
+    };
+  },
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-multiple-variables@component.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-multiple-variables@component.tsx
new file mode 100644
index 00000000000..93a52cdc277
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-multiple-variables@component.tsx
@@ -0,0 +1,12 @@
+import { collection1, collection2 } from "shared-multiple-variables.tsx";
+// Multiple shared variables used by both loader and component
+
+const config = {
+  apiUrl: 'http://api.com'
+};
+function TestComponent() {
+  return <div>
+      {collection1.name} {collection2.name} {config.apiUrl}
+    </div>;
+}
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-multiple-variables@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-multiple-variables@errorComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-multiple-variables@notFoundComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-multiple-variables@notFoundComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-nested-closure.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-nested-closure.tsx
new file mode 100644
index 00000000000..e07e8b64724
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-nested-closure.tsx
@@ -0,0 +1,13 @@
+const $$splitComponentImporter = () => import('shared-nested-closure.tsx?tsr-split=component');
+import { lazyRouteComponent } from '@tanstack/react-router';
+import { createFileRoute } from '@tanstack/react-router';
+
+// Nested closure - ensure we track through closures
+const cfg = {
+  api: 'http://api.com'
+};
+const makeLoader = () => () => cfg.api;
+export const Route = createFileRoute('/test')({
+  loader: makeLoader(),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-nested-closure@component.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-nested-closure@component.tsx
new file mode 100644
index 00000000000..059366b9fce
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-nested-closure@component.tsx
@@ -0,0 +1,6 @@
+// Nested closure - ensure we track through closures
+const cfg = {
+  api: 'http://api.com'
+};
+const Component = () => <div>{cfg.api}</div>;
+export { Component as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-nested-closure@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-nested-closure@errorComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-nested-closure@notFoundComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-nested-closure@notFoundComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-nested-function-usage.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-nested-function-usage.tsx
new file mode 100644
index 00000000000..0355c697fcf
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-nested-function-usage.tsx
@@ -0,0 +1,17 @@
+console.warn("[tanstack-router] These exports from \"shared-nested-function-usage.tsx\" will not be code-split and will increase your bundle size:\n- collection\nFor the best optimization, these items should either have their export statements removed, or be imported from another location that is not a route file.");
+const $$splitComponentImporter = () => import('shared-nested-function-usage.tsx?tsr-split=component');
+import { lazyRouteComponent } from '@tanstack/react-router';
+import { createFileRoute } from '@tanstack/react-router';
+
+// Variable used inside nested function
+export const collection = {
+  name: 'todos',
+  items: []
+};
+function loadData() {
+  return collection.items;
+}
+export const Route = createFileRoute('/test')({
+  loader: loadData,
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-nested-function-usage@component.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-nested-function-usage@component.tsx
new file mode 100644
index 00000000000..46c364af7fb
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-nested-function-usage@component.tsx
@@ -0,0 +1,5 @@
+import { collection } from "shared-nested-function-usage.tsx"; // Variable used inside nested function
+function TestComponent() {
+  return <div>{collection.name}</div>;
+}
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-nested-function-usage@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-nested-function-usage@errorComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-nested-function-usage@notFoundComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-nested-function-usage@notFoundComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-object-with-methods.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-object-with-methods.tsx
new file mode 100644
index 00000000000..6d95d6e6f42
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-object-with-methods.tsx
@@ -0,0 +1,19 @@
+console.warn("[tanstack-router] These exports from \"shared-object-with-methods.tsx\" will not be code-split and will increase your bundle size:\n- api\nFor the best optimization, these items should either have their export statements removed, or be imported from another location that is not a route file.");
+const $$splitComponentImporter = () => import('shared-object-with-methods.tsx?tsr-split=component');
+import { lazyRouteComponent } from '@tanstack/react-router';
+import { createFileRoute } from '@tanstack/react-router';
+
+// Object contains methods (functions) - should still be shared as whole object
+export const api = {
+  endpoint: 'http://api.com',
+  fetch: async () => ({
+    data: 'loaded'
+  }),
+  cache: new Map()
+};
+export const Route = createFileRoute('/test')({
+  loader: async () => {
+    return api.fetch();
+  },
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-object-with-methods@component.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-object-with-methods@component.tsx
new file mode 100644
index 00000000000..772c97f84cd
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-object-with-methods@component.tsx
@@ -0,0 +1,7 @@
+import { api } from "shared-object-with-methods.tsx"; // Object contains methods (functions) - should still be shared as whole object
+function TestComponent() {
+  return <div>
+      {api.endpoint} - Cache size: {api.cache.size}
+    </div>;
+}
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-object-with-methods@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-object-with-methods@errorComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-object-with-methods@notFoundComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-object-with-methods@notFoundComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-partial-declarators.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-partial-declarators.tsx
new file mode 100644
index 00000000000..c3fab600210
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-partial-declarators.tsx
@@ -0,0 +1,19 @@
+console.warn("[tanstack-router] These exports from \"shared-partial-declarators.tsx\" will not be code-split and will increase your bundle size:\n- shared\nFor the best optimization, these items should either have their export statements removed, or be imported from another location that is not a route file.");
+const $$splitComponentImporter = () => import('shared-partial-declarators.tsx?tsr-split=component');
+import { lazyRouteComponent } from '@tanstack/react-router';
+import { createFileRoute } from '@tanstack/react-router';
+
+// Multiple declarators in same statement
+// Only 'shared' is used by both loader and component
+// 'a' is only used in component, should NOT be exported
+export const shared = new Map();
+export const Route = createFileRoute('/test')({
+  loader: async () => {
+    // Only uses shared, not a
+    shared.set('loaded', true);
+    return {
+      data: 'loaded'
+    };
+  },
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-partial-declarators@component.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-partial-declarators@component.tsx
new file mode 100644
index 00000000000..6e219600a61
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-partial-declarators@component.tsx
@@ -0,0 +1,10 @@
+import { shared } from "shared-partial-declarators.tsx";
+// Multiple declarators in same statement
+// Only 'shared' is used by both loader and component
+// 'a' is only used in component, should NOT be exported
+const a = 1;
+function TestComponent() {
+  // Uses both shared and a
+  return <div>Count: {shared.size + a}</div>;
+}
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-partial-declarators@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-partial-declarators@errorComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-partial-declarators@notFoundComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-partial-declarators@notFoundComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-variable-dependency.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-variable-dependency.tsx
new file mode 100644
index 00000000000..38ea19f9391
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-variable-dependency.tsx
@@ -0,0 +1,20 @@
+console.warn("[tanstack-router] These exports from \"shared-variable-dependency.tsx\" will not be code-split and will increase your bundle size:\n- collection\nFor the best optimization, these items should either have their export statements removed, or be imported from another location that is not a route file.");
+const $$splitComponentImporter = () => import('shared-variable-dependency.tsx?tsr-split=component');
+import { lazyRouteComponent } from '@tanstack/react-router';
+import { createFileRoute } from '@tanstack/react-router';
+
+// Variable references another shared variable
+const baseConfig = {
+  apiUrl: 'http://api.com',
+  timeout: 5000
+};
+export const collection = {
+  config: baseConfig,
+  name: 'todos'
+};
+export const Route = createFileRoute('/test')({
+  loader: async () => {
+    return collection.name;
+  },
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-variable-dependency@component.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-variable-dependency@component.tsx
new file mode 100644
index 00000000000..aa18e68770e
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-variable-dependency@component.tsx
@@ -0,0 +1,12 @@
+import { collection } from "shared-variable-dependency.tsx";
+// Variable references another shared variable
+const baseConfig = {
+  apiUrl: 'http://api.com',
+  timeout: 5000
+};
+function TestComponent() {
+  return <div>
+      {collection.name} - {baseConfig.apiUrl}
+    </div>;
+}
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-variable-dependency@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-variable-dependency@errorComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-variable-dependency@notFoundComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/shared-variable-dependency@notFoundComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/split-only-variable.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/split-only-variable.tsx
new file mode 100644
index 00000000000..15b4e9d9741
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/split-only-variable.tsx
@@ -0,0 +1,17 @@
+const $$splitComponentImporter = () => import('split-only-variable.tsx?tsr-split=component');
+import { lazyRouteComponent } from '@tanstack/react-router';
+import { createFileRoute } from '@tanstack/react-router';
+
+// Variable used ONLY in component (split part), NOT in loader
+// Should NOT be exported from reference file or imported in split file
+const onlySplit = new Map();
+onlySplit.set('key', 'value');
+export const Route = createFileRoute('/test')({
+  loader: async () => {
+    // Loader doesn't use onlySplit at all
+    return {
+      data: 'loaded'
+    };
+  },
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/split-only-variable@component.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/split-only-variable@component.tsx
new file mode 100644
index 00000000000..761bb11e737
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/split-only-variable@component.tsx
@@ -0,0 +1,9 @@
+// Variable used ONLY in component (split part), NOT in loader
+// Should NOT be exported from reference file or imported in split file
+const onlySplit = new Map();
+onlySplit.set('key', 'value');
+function TestComponent() {
+  // Only component uses onlySplit
+  return <div>Size: {onlySplit.size}</div>;
+}
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/split-only-variable@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/split-only-variable@errorComponent.tsx
new file mode 100644
index 00000000000..90e58d835af
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/split-only-variable@errorComponent.tsx
@@ -0,0 +1,4 @@
+// Variable used ONLY in component (split part), NOT in loader
+// Should NOT be exported from reference file or imported in split file
+const onlySplit = new Map();
+onlySplit.set('key', 'value');
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/split-only-variable@notFoundComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/split-only-variable@notFoundComponent.tsx
new file mode 100644
index 00000000000..90e58d835af
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/1-default/split-only-variable@notFoundComponent.tsx
@@ -0,0 +1,4 @@
+// Variable used ONLY in component (split part), NOT in loader
+// Should NOT be exported from reference file or imported in split file
+const onlySplit = new Map();
+onlySplit.set('key', 'value');
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-alias-chain.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-alias-chain.tsx
new file mode 100644
index 00000000000..efb3316c999
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-alias-chain.tsx
@@ -0,0 +1,12 @@
+const $$splitComponentImporter = () => import('shared-alias-chain.tsx?tsr-split=component---errorComponent---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/react-router';
+const $$splitLoaderImporter = () => import('shared-alias-chain.tsx?tsr-split=loader');
+import { lazyFn } from '@tanstack/react-router';
+import { createFileRoute } from '@tanstack/react-router';
+
+// Alias chain - ensure we track through aliases
+
+export const Route = createFileRoute('/test')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-alias-chain@component---errorComponent---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-alias-chain@component---errorComponent---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..a96a444daf7
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-alias-chain@component---errorComponent---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,10 @@
+// Alias chain - ensure we track through aliases
+const base = {
+  name: 'collection',
+  items: []
+};
+const alias = base;
+function TestComponent() {
+  return <div>{alias.name}</div>;
+}
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-alias-chain@loader.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-alias-chain@loader.tsx
new file mode 100644
index 00000000000..a5d32cf40db
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-alias-chain@loader.tsx
@@ -0,0 +1,10 @@
+// Alias chain - ensure we track through aliases
+const base = {
+  name: 'collection',
+  items: []
+};
+const alias = base;
+const SplitLoader = async () => {
+  return alias.items;
+};
+export { SplitLoader as loader };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-already-exported.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-already-exported.tsx
new file mode 100644
index 00000000000..c89424ed81c
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-already-exported.tsx
@@ -0,0 +1,15 @@
+const $$splitComponentImporter = () => import('shared-already-exported.tsx?tsr-split=component---errorComponent---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/react-router';
+const $$splitLoaderImporter = () => import('shared-already-exported.tsx?tsr-split=loader');
+import { lazyFn } from '@tanstack/react-router';
+import { createFileRoute } from '@tanstack/react-router';
+
+// Already exported variable - should not be double-exported
+export const collection = {
+  name: 'todos',
+  preload: async () => {}
+};
+export const Route = createFileRoute('/test')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-already-exported@component---errorComponent---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-already-exported@component---errorComponent---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..63fdb78e140
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-already-exported@component---errorComponent---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,6 @@
+// Already exported variable - should not be double-exported
+import { collection } from "shared-already-exported.tsx";
+function TestComponent() {
+  return <div>{collection.name}</div>;
+}
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-already-exported@loader.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-already-exported@loader.tsx
new file mode 100644
index 00000000000..f7ef905c211
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-already-exported@loader.tsx
@@ -0,0 +1,9 @@
+// Already exported variable - should not be double-exported
+import { collection } from "shared-already-exported.tsx";
+const SplitLoader = async () => {
+  await collection.preload();
+  return {
+    data: 'loaded'
+  };
+};
+export { SplitLoader as loader };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-call-expression.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-call-expression.tsx
new file mode 100644
index 00000000000..6d55e663a0f
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-call-expression.tsx
@@ -0,0 +1,12 @@
+const $$splitComponentImporter = () => import('shared-call-expression.tsx?tsr-split=component---errorComponent---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/react-router';
+const $$splitLoaderImporter = () => import('shared-call-expression.tsx?tsr-split=loader');
+import { lazyFn } from '@tanstack/react-router';
+import { createFileRoute } from '@tanstack/react-router';
+
+// Call expression initializers - should still work
+
+export const Route = createFileRoute('/test')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-call-expression@component---errorComponent---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-call-expression@component---errorComponent---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..b0932a66400
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-call-expression@component---errorComponent---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,19 @@
+// Call expression initializers - should still work
+const collection = {
+  create: (name: string) => ({
+    name,
+    items: []
+  })
+}.create('todos');
+const query = {
+  from: (table: string) => ({
+    table,
+    filters: []
+  })
+}.from('users');
+function TestComponent() {
+  return <div>
+      {collection.name} - {query.table}
+    </div>;
+}
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-call-expression@loader.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-call-expression@loader.tsx
new file mode 100644
index 00000000000..a1e4838a861
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-call-expression@loader.tsx
@@ -0,0 +1,11 @@
+// Call expression initializers - should still work
+const collection = {
+  create: (name: string) => ({
+    name,
+    items: []
+  })
+}.create('todos');
+const SplitLoader = async () => {
+  return collection.items;
+};
+export { SplitLoader as loader };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-destructuring.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-destructuring.tsx
new file mode 100644
index 00000000000..92ccb309bde
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-destructuring.tsx
@@ -0,0 +1,12 @@
+const $$splitComponentImporter = () => import('shared-destructuring.tsx?tsr-split=component---errorComponent---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/react-router';
+const $$splitLoaderImporter = () => import('shared-destructuring.tsx?tsr-split=loader');
+import { lazyFn } from '@tanstack/react-router';
+import { createFileRoute } from '@tanstack/react-router';
+
+// Destructuring - ensure we promote the right binding
+
+export const Route = createFileRoute('/test')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-destructuring@component---errorComponent---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-destructuring@component---errorComponent---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..b7ed1ffde9b
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-destructuring@component---errorComponent---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,13 @@
+// Destructuring - ensure we promote the right binding
+const cfg = {
+  apiUrl: 'http://api.com',
+  timeout: 5000
+};
+const {
+  apiUrl
+} = cfg;
+function TestComponent() {
+  // Also uses the destructured binding
+  return <div>API: {apiUrl}</div>;
+}
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-destructuring@loader.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-destructuring@loader.tsx
new file mode 100644
index 00000000000..6c138455e6b
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-destructuring@loader.tsx
@@ -0,0 +1,13 @@
+// Destructuring - ensure we promote the right binding
+const cfg = {
+  apiUrl: 'http://api.com',
+  timeout: 5000
+};
+const {
+  apiUrl
+} = cfg;
+const SplitLoader = async () => {
+  // Uses the destructured binding
+  return fetch(apiUrl).then(r => r.json());
+};
+export { SplitLoader as loader };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-let-reassignment.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-let-reassignment.tsx
new file mode 100644
index 00000000000..b3db8b7b88a
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-let-reassignment.tsx
@@ -0,0 +1,18 @@
+const $$splitComponentImporter = () => import('shared-let-reassignment.tsx?tsr-split=component---errorComponent---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/react-router';
+const $$splitLoaderImporter = () => import('shared-let-reassignment.tsx?tsr-split=loader');
+import { lazyFn } from '@tanstack/react-router';
+import { createFileRoute } from '@tanstack/react-router';
+
+// let with reassignment - tests live binding behavior
+let store = {
+  count: 0
+};
+store = {
+  count: 1,
+  updated: true
+};
+export const Route = createFileRoute('/test')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-let-reassignment@component---errorComponent---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-let-reassignment@component---errorComponent---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..cd88b5634c8
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-let-reassignment@component---errorComponent---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,12 @@
+// let with reassignment - tests live binding behavior
+let store = {
+  count: 0
+};
+store = {
+  count: 1,
+  updated: true
+};
+function TestComponent() {
+  return <div>Count: {store.count}</div>;
+}
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-let-reassignment@component.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-let-reassignment@component.tsx
new file mode 100644
index 00000000000..f397a814ed8
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-let-reassignment@component.tsx
@@ -0,0 +1,12 @@
+// let with reassignment - tests live binding behavior
+let store = {
+  count: 0
+};
+store = {
+  count: 1,
+  updated: true
+};
+function TestComponent() {
+  return <div>Count: {store.count}</div>;
+}
+export { TestComponent as component };
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-let-reassignment@loader.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-let-reassignment@loader.tsx
new file mode 100644
index 00000000000..89f2fced8d8
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-let-reassignment@loader.tsx
@@ -0,0 +1,15 @@
+// let with reassignment - tests live binding behavior
+let store = {
+  count: 0
+};
+store = {
+  count: 1,
+  updated: true
+};
+const SplitLoader = async () => {
+  store.count++;
+  return {
+    data: 'loaded'
+  };
+};
+export { SplitLoader as loader };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-module-variable.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-module-variable.tsx
new file mode 100644
index 00000000000..c3e12a06003
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-module-variable.tsx
@@ -0,0 +1,19 @@
+const $$splitComponentImporter = () => import('shared-module-variable.tsx?tsr-split=component---errorComponent---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/react-router';
+const $$splitLoaderImporter = () => import('shared-module-variable.tsx?tsr-split=loader');
+import { lazyFn } from '@tanstack/react-router';
+import { createFileRoute } from '@tanstack/react-router';
+
+// Module-level variable used in both loader and component
+// This simulates a collection/query that should only be initialized once
+const collection = {
+  name: 'todos',
+  preload: async () => {}
+};
+
+// Side effect at module level - should only run once
+console.log('Module initialized:', collection.name);
+export const Route = createFileRoute('/todos')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-module-variable@component---errorComponent---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-module-variable@component---errorComponent---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..f53fff41701
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-module-variable@component---errorComponent---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,14 @@
+// Module-level variable used in both loader and component
+// This simulates a collection/query that should only be initialized once
+const collection = {
+  name: 'todos',
+  preload: async () => {}
+};
+
+// Side effect at module level - should only run once
+console.log('Module initialized:', collection.name);
+function TodosComponent() {
+  // Use collection in component
+  return <div>{collection.name}</div>;
+}
+export { TodosComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-module-variable@loader.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-module-variable@loader.tsx
new file mode 100644
index 00000000000..1d52dc1b192
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-module-variable@loader.tsx
@@ -0,0 +1,17 @@
+// Module-level variable used in both loader and component
+// This simulates a collection/query that should only be initialized once
+const collection = {
+  name: 'todos',
+  preload: async () => {}
+};
+
+// Side effect at module level - should only run once
+console.log('Module initialized:', collection.name);
+const SplitLoader = async () => {
+  // Use collection in loader
+  await collection.preload();
+  return {
+    data: 'loaded'
+  };
+};
+export { SplitLoader as loader };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-multiple-declarations.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-multiple-declarations.tsx
new file mode 100644
index 00000000000..8240bc8b44a
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-multiple-declarations.tsx
@@ -0,0 +1,13 @@
+const $$splitComponentImporter = () => import('shared-multiple-declarations.tsx?tsr-split=component---errorComponent---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/react-router';
+const $$splitLoaderImporter = () => import('shared-multiple-declarations.tsx?tsr-split=loader');
+import { lazyFn } from '@tanstack/react-router';
+import { createFileRoute } from '@tanstack/react-router';
+
+// Multiple declarations in same const statement
+// Only collection1 is shared, but both are in same declaration
+
+export const Route = createFileRoute('/test')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-multiple-declarations@component---errorComponent---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-multiple-declarations@component---errorComponent---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..c103abe982e
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-multiple-declarations@component---errorComponent---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,14 @@
+// Multiple declarations in same const statement
+// Only collection1 is shared, but both are in same declaration
+const collection1 = {
+    name: 'todos'
+  },
+  collection2 = {
+    name: 'users'
+  };
+function TestComponent() {
+  return <div>
+      {collection1.name} {collection2.name}
+    </div>;
+}
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-multiple-declarations@loader.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-multiple-declarations@loader.tsx
new file mode 100644
index 00000000000..ffa805a6f6e
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-multiple-declarations@loader.tsx
@@ -0,0 +1,9 @@
+// Multiple declarations in same const statement
+// Only collection1 is shared, but both are in same declaration
+const collection1 = {
+  name: 'todos'
+};
+const SplitLoader = async () => {
+  return collection1.name;
+};
+export { SplitLoader as loader };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-multiple-variables.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-multiple-variables.tsx
new file mode 100644
index 00000000000..669474c5ba1
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-multiple-variables.tsx
@@ -0,0 +1,12 @@
+const $$splitComponentImporter = () => import('shared-multiple-variables.tsx?tsr-split=component---errorComponent---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/react-router';
+const $$splitLoaderImporter = () => import('shared-multiple-variables.tsx?tsr-split=loader');
+import { lazyFn } from '@tanstack/react-router';
+import { createFileRoute } from '@tanstack/react-router';
+
+// Multiple shared variables used by both loader and component
+
+export const Route = createFileRoute('/test')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-multiple-variables@component---errorComponent---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-multiple-variables@component---errorComponent---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..6bd0c027294
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-multiple-variables@component---errorComponent---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,18 @@
+// Multiple shared variables used by both loader and component
+const collection1 = {
+  name: 'todos',
+  preload: async () => {}
+};
+const collection2 = {
+  name: 'users',
+  preload: async () => {}
+};
+const config = {
+  apiUrl: 'http://api.com'
+};
+function TestComponent() {
+  return <div>
+      {collection1.name} {collection2.name} {config.apiUrl}
+    </div>;
+}
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-multiple-variables@loader.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-multiple-variables@loader.tsx
new file mode 100644
index 00000000000..3a65c044151
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-multiple-variables@loader.tsx
@@ -0,0 +1,17 @@
+// Multiple shared variables used by both loader and component
+const collection1 = {
+  name: 'todos',
+  preload: async () => {}
+};
+const collection2 = {
+  name: 'users',
+  preload: async () => {}
+};
+const SplitLoader = async () => {
+  await collection1.preload();
+  await collection2.preload();
+  return {
+    data: 'loaded'
+  };
+};
+export { SplitLoader as loader };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-nested-closure.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-nested-closure.tsx
new file mode 100644
index 00000000000..e873905549a
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-nested-closure.tsx
@@ -0,0 +1,12 @@
+const $$splitComponentImporter = () => import('shared-nested-closure.tsx?tsr-split=component---errorComponent---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/react-router';
+const $$splitLoaderImporter = () => import('shared-nested-closure.tsx?tsr-split=loader');
+import { lazyFn } from '@tanstack/react-router';
+import { createFileRoute } from '@tanstack/react-router';
+
+// Nested closure - ensure we track through closures
+
+export const Route = createFileRoute('/test')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-nested-closure@component---errorComponent---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-nested-closure@component---errorComponent---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..059366b9fce
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-nested-closure@component---errorComponent---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,6 @@
+// Nested closure - ensure we track through closures
+const cfg = {
+  api: 'http://api.com'
+};
+const Component = () => <div>{cfg.api}</div>;
+export { Component as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-nested-closure@loader.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-nested-closure@loader.tsx
new file mode 100644
index 00000000000..f1cd7767dbb
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-nested-closure@loader.tsx
@@ -0,0 +1,7 @@
+// Nested closure - ensure we track through closures
+const cfg = {
+  api: 'http://api.com'
+};
+const makeLoader = () => () => cfg.api;
+const SplitLoader = makeLoader();
+export { SplitLoader as loader };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-nested-function-usage.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-nested-function-usage.tsx
new file mode 100644
index 00000000000..01ac35d82e3
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-nested-function-usage.tsx
@@ -0,0 +1,12 @@
+const $$splitComponentImporter = () => import('shared-nested-function-usage.tsx?tsr-split=component---errorComponent---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/react-router';
+const $$splitLoaderImporter = () => import('shared-nested-function-usage.tsx?tsr-split=loader');
+import { lazyFn } from '@tanstack/react-router';
+import { createFileRoute } from '@tanstack/react-router';
+
+// Variable used inside nested function
+
+export const Route = createFileRoute('/test')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-nested-function-usage@component---errorComponent---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-nested-function-usage@component---errorComponent---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..247601d8ec3
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-nested-function-usage@component---errorComponent---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,9 @@
+// Variable used inside nested function
+const collection = {
+  name: 'todos',
+  items: []
+};
+function TestComponent() {
+  return <div>{collection.name}</div>;
+}
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-nested-function-usage@loader.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-nested-function-usage@loader.tsx
new file mode 100644
index 00000000000..78b8d0a7e47
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-nested-function-usage@loader.tsx
@@ -0,0 +1,9 @@
+// Variable used inside nested function
+const collection = {
+  name: 'todos',
+  items: []
+};
+function loadData() {
+  return collection.items;
+}
+export { loadData as loader };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-object-with-methods.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-object-with-methods.tsx
new file mode 100644
index 00000000000..df75c09e0f3
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-object-with-methods.tsx
@@ -0,0 +1,12 @@
+const $$splitComponentImporter = () => import('shared-object-with-methods.tsx?tsr-split=component---errorComponent---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/react-router';
+const $$splitLoaderImporter = () => import('shared-object-with-methods.tsx?tsr-split=loader');
+import { lazyFn } from '@tanstack/react-router';
+import { createFileRoute } from '@tanstack/react-router';
+
+// Object contains methods (functions) - should still be shared as whole object
+
+export const Route = createFileRoute('/test')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-object-with-methods@component---errorComponent---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-object-with-methods@component---errorComponent---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..0b87b4d5576
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-object-with-methods@component---errorComponent---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,14 @@
+// Object contains methods (functions) - should still be shared as whole object
+const api = {
+  endpoint: 'http://api.com',
+  fetch: async () => ({
+    data: 'loaded'
+  }),
+  cache: new Map()
+};
+function TestComponent() {
+  return <div>
+      {api.endpoint} - Cache size: {api.cache.size}
+    </div>;
+}
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-object-with-methods@loader.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-object-with-methods@loader.tsx
new file mode 100644
index 00000000000..53f950387de
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-object-with-methods@loader.tsx
@@ -0,0 +1,12 @@
+// Object contains methods (functions) - should still be shared as whole object
+const api = {
+  endpoint: 'http://api.com',
+  fetch: async () => ({
+    data: 'loaded'
+  }),
+  cache: new Map()
+};
+const SplitLoader = async () => {
+  return api.fetch();
+};
+export { SplitLoader as loader };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-partial-declarators.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-partial-declarators.tsx
new file mode 100644
index 00000000000..41e0d88e0bd
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-partial-declarators.tsx
@@ -0,0 +1,14 @@
+const $$splitComponentImporter = () => import('shared-partial-declarators.tsx?tsr-split=component---errorComponent---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/react-router';
+const $$splitLoaderImporter = () => import('shared-partial-declarators.tsx?tsr-split=loader');
+import { lazyFn } from '@tanstack/react-router';
+import { createFileRoute } from '@tanstack/react-router';
+
+// Multiple declarators in same statement
+// Only 'shared' is used by both loader and component
+// 'a' is only used in component, should NOT be exported
+
+export const Route = createFileRoute('/test')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-partial-declarators@component---errorComponent---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-partial-declarators@component---errorComponent---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..a6005a94bb0
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-partial-declarators@component---errorComponent---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,10 @@
+// Multiple declarators in same statement
+// Only 'shared' is used by both loader and component
+// 'a' is only used in component, should NOT be exported
+const a = 1,
+  shared = new Map();
+function TestComponent() {
+  // Uses both shared and a
+  return <div>Count: {shared.size + a}</div>;
+}
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-partial-declarators@loader.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-partial-declarators@loader.tsx
new file mode 100644
index 00000000000..3a13615d89c
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-partial-declarators@loader.tsx
@@ -0,0 +1,12 @@
+// Multiple declarators in same statement
+// Only 'shared' is used by both loader and component
+// 'a' is only used in component, should NOT be exported
+const shared = new Map();
+const SplitLoader = async () => {
+  // Only uses shared, not a
+  shared.set('loaded', true);
+  return {
+    data: 'loaded'
+  };
+};
+export { SplitLoader as loader };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-variable-dependency.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-variable-dependency.tsx
new file mode 100644
index 00000000000..3d4e6c65f50
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-variable-dependency.tsx
@@ -0,0 +1,12 @@
+const $$splitComponentImporter = () => import('shared-variable-dependency.tsx?tsr-split=component---errorComponent---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/react-router';
+const $$splitLoaderImporter = () => import('shared-variable-dependency.tsx?tsr-split=loader');
+import { lazyFn } from '@tanstack/react-router';
+import { createFileRoute } from '@tanstack/react-router';
+
+// Variable references another shared variable
+
+export const Route = createFileRoute('/test')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-variable-dependency@component---errorComponent---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-variable-dependency@component---errorComponent---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..fe734a45d03
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-variable-dependency@component---errorComponent---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,15 @@
+// Variable references another shared variable
+const baseConfig = {
+  apiUrl: 'http://api.com',
+  timeout: 5000
+};
+const collection = {
+  config: baseConfig,
+  name: 'todos'
+};
+function TestComponent() {
+  return <div>
+      {collection.name} - {baseConfig.apiUrl}
+    </div>;
+}
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-variable-dependency@loader.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-variable-dependency@loader.tsx
new file mode 100644
index 00000000000..742f37595ce
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/shared-variable-dependency@loader.tsx
@@ -0,0 +1,13 @@
+// Variable references another shared variable
+const baseConfig = {
+  apiUrl: 'http://api.com',
+  timeout: 5000
+};
+const collection = {
+  config: baseConfig,
+  name: 'todos'
+};
+const SplitLoader = async () => {
+  return collection.name;
+};
+export { SplitLoader as loader };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/split-only-variable.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/split-only-variable.tsx
new file mode 100644
index 00000000000..6a4fc208806
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/split-only-variable.tsx
@@ -0,0 +1,14 @@
+const $$splitComponentImporter = () => import('split-only-variable.tsx?tsr-split=component---errorComponent---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/react-router';
+const $$splitLoaderImporter = () => import('split-only-variable.tsx?tsr-split=loader');
+import { lazyFn } from '@tanstack/react-router';
+import { createFileRoute } from '@tanstack/react-router';
+
+// Variable used ONLY in component (split part), NOT in loader
+// Should NOT be exported from reference file or imported in split file
+const onlySplit = new Map();
+onlySplit.set('key', 'value');
+export const Route = createFileRoute('/test')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/split-only-variable@component---errorComponent---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/split-only-variable@component---errorComponent---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..761bb11e737
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/split-only-variable@component---errorComponent---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,9 @@
+// Variable used ONLY in component (split part), NOT in loader
+// Should NOT be exported from reference file or imported in split file
+const onlySplit = new Map();
+onlySplit.set('key', 'value');
+function TestComponent() {
+  // Only component uses onlySplit
+  return <div>Size: {onlySplit.size}</div>;
+}
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/split-only-variable@loader.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/split-only-variable@loader.tsx
new file mode 100644
index 00000000000..90e112ef6a2
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/2-components-combined-loader-separate/split-only-variable@loader.tsx
@@ -0,0 +1,11 @@
+// Variable used ONLY in component (split part), NOT in loader
+// Should NOT be exported from reference file or imported in split file
+const onlySplit = new Map();
+onlySplit.set('key', 'value');
+const SplitLoader = async () => {
+  // Loader doesn't use onlySplit at all
+  return {
+    data: 'loaded'
+  };
+};
+export { SplitLoader as loader };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-alias-chain.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-alias-chain.tsx
new file mode 100644
index 00000000000..a0eb0c62d25
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-alias-chain.tsx
@@ -0,0 +1,12 @@
+const $$splitComponentImporter = () => import('shared-alias-chain.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/react-router';
+const $$splitLoaderImporter = () => import('shared-alias-chain.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyFn } from '@tanstack/react-router';
+import { createFileRoute } from '@tanstack/react-router';
+
+// Alias chain - ensure we track through aliases
+
+export const Route = createFileRoute('/test')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-alias-chain@component---loader---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-alias-chain@component---loader---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..24a3a8ad678
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-alias-chain@component---loader---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,14 @@
+// Alias chain - ensure we track through aliases
+const base = {
+  name: 'collection',
+  items: []
+};
+const alias = base;
+function TestComponent() {
+  return <div>{alias.name}</div>;
+}
+const SplitLoader = async () => {
+  return alias.items;
+};
+export { SplitLoader as loader };
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-alias-chain@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-alias-chain@errorComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-already-exported.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-already-exported.tsx
new file mode 100644
index 00000000000..a4199e94e08
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-already-exported.tsx
@@ -0,0 +1,15 @@
+const $$splitComponentImporter = () => import('shared-already-exported.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/react-router';
+const $$splitLoaderImporter = () => import('shared-already-exported.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyFn } from '@tanstack/react-router';
+import { createFileRoute } from '@tanstack/react-router';
+
+// Already exported variable - should not be double-exported
+export const collection = {
+  name: 'todos',
+  preload: async () => {}
+};
+export const Route = createFileRoute('/test')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-already-exported@component---loader---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-already-exported@component---loader---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..cdc0d4c02e0
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-already-exported@component---loader---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,13 @@
+// Already exported variable - should not be double-exported
+import { collection } from "shared-already-exported.tsx";
+function TestComponent() {
+  return <div>{collection.name}</div>;
+}
+const SplitLoader = async () => {
+  await collection.preload();
+  return {
+    data: 'loaded'
+  };
+};
+export { SplitLoader as loader };
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-already-exported@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-already-exported@errorComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-call-expression.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-call-expression.tsx
new file mode 100644
index 00000000000..f12354b301b
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-call-expression.tsx
@@ -0,0 +1,12 @@
+const $$splitComponentImporter = () => import('shared-call-expression.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/react-router';
+const $$splitLoaderImporter = () => import('shared-call-expression.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyFn } from '@tanstack/react-router';
+import { createFileRoute } from '@tanstack/react-router';
+
+// Call expression initializers - should still work
+
+export const Route = createFileRoute('/test')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-call-expression@component---loader---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-call-expression@component---loader---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..d2ddb0ff86f
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-call-expression@component---loader---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,23 @@
+// Call expression initializers - should still work
+const collection = {
+  create: (name: string) => ({
+    name,
+    items: []
+  })
+}.create('todos');
+const query = {
+  from: (table: string) => ({
+    table,
+    filters: []
+  })
+}.from('users');
+function TestComponent() {
+  return <div>
+      {collection.name} - {query.table}
+    </div>;
+}
+const SplitLoader = async () => {
+  return collection.items;
+};
+export { SplitLoader as loader };
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-call-expression@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-call-expression@errorComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-destructuring.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-destructuring.tsx
new file mode 100644
index 00000000000..e77ac20725e
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-destructuring.tsx
@@ -0,0 +1,12 @@
+const $$splitComponentImporter = () => import('shared-destructuring.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/react-router';
+const $$splitLoaderImporter = () => import('shared-destructuring.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyFn } from '@tanstack/react-router';
+import { createFileRoute } from '@tanstack/react-router';
+
+// Destructuring - ensure we promote the right binding
+
+export const Route = createFileRoute('/test')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-destructuring@component---loader---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-destructuring@component---loader---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..03625751b13
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-destructuring@component---loader---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,18 @@
+// Destructuring - ensure we promote the right binding
+const cfg = {
+  apiUrl: 'http://api.com',
+  timeout: 5000
+};
+const {
+  apiUrl
+} = cfg;
+function TestComponent() {
+  // Also uses the destructured binding
+  return <div>API: {apiUrl}</div>;
+}
+const SplitLoader = async () => {
+  // Uses the destructured binding
+  return fetch(apiUrl).then(r => r.json());
+};
+export { SplitLoader as loader };
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-destructuring@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-destructuring@errorComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-let-reassignment.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-let-reassignment.tsx
new file mode 100644
index 00000000000..f0c0030e4a7
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-let-reassignment.tsx
@@ -0,0 +1,18 @@
+const $$splitComponentImporter = () => import('shared-let-reassignment.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/react-router';
+const $$splitLoaderImporter = () => import('shared-let-reassignment.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyFn } from '@tanstack/react-router';
+import { createFileRoute } from '@tanstack/react-router';
+
+// let with reassignment - tests live binding behavior
+let store = {
+  count: 0
+};
+store = {
+  count: 1,
+  updated: true
+};
+export const Route = createFileRoute('/test')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-let-reassignment@component---loader---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-let-reassignment@component---loader---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..ba7c72d7121
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-let-reassignment@component---loader---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,19 @@
+// let with reassignment - tests live binding behavior
+let store = {
+  count: 0
+};
+store = {
+  count: 1,
+  updated: true
+};
+function TestComponent() {
+  return <div>Count: {store.count}</div>;
+}
+const SplitLoader = async () => {
+  store.count++;
+  return {
+    data: 'loaded'
+  };
+};
+export { SplitLoader as loader };
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-let-reassignment@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-let-reassignment@errorComponent.tsx
new file mode 100644
index 00000000000..f52dfd0d532
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-let-reassignment@errorComponent.tsx
@@ -0,0 +1,8 @@
+// let with reassignment - tests live binding behavior
+let store = {
+  count: 0
+};
+store = {
+  count: 1,
+  updated: true
+};
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-module-variable.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-module-variable.tsx
new file mode 100644
index 00000000000..2d4eb74e763
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-module-variable.tsx
@@ -0,0 +1,19 @@
+const $$splitComponentImporter = () => import('shared-module-variable.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/react-router';
+const $$splitLoaderImporter = () => import('shared-module-variable.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyFn } from '@tanstack/react-router';
+import { createFileRoute } from '@tanstack/react-router';
+
+// Module-level variable used in both loader and component
+// This simulates a collection/query that should only be initialized once
+const collection = {
+  name: 'todos',
+  preload: async () => {}
+};
+
+// Side effect at module level - should only run once
+console.log('Module initialized:', collection.name);
+export const Route = createFileRoute('/todos')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-module-variable@component---loader---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-module-variable@component---loader---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..4b28c46a7b0
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-module-variable@component---loader---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,22 @@
+// Module-level variable used in both loader and component
+// This simulates a collection/query that should only be initialized once
+const collection = {
+  name: 'todos',
+  preload: async () => {}
+};
+
+// Side effect at module level - should only run once
+console.log('Module initialized:', collection.name);
+function TodosComponent() {
+  // Use collection in component
+  return <div>{collection.name}</div>;
+}
+const SplitLoader = async () => {
+  // Use collection in loader
+  await collection.preload();
+  return {
+    data: 'loaded'
+  };
+};
+export { SplitLoader as loader };
+export { TodosComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-module-variable@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-module-variable@errorComponent.tsx
new file mode 100644
index 00000000000..caf87ba5c8d
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-module-variable@errorComponent.tsx
@@ -0,0 +1,9 @@
+// Module-level variable used in both loader and component
+// This simulates a collection/query that should only be initialized once
+const collection = {
+  name: 'todos',
+  preload: async () => {}
+};
+
+// Side effect at module level - should only run once
+console.log('Module initialized:', collection.name);
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-multiple-declarations.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-multiple-declarations.tsx
new file mode 100644
index 00000000000..4e7a2238af6
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-multiple-declarations.tsx
@@ -0,0 +1,13 @@
+const $$splitComponentImporter = () => import('shared-multiple-declarations.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/react-router';
+const $$splitLoaderImporter = () => import('shared-multiple-declarations.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyFn } from '@tanstack/react-router';
+import { createFileRoute } from '@tanstack/react-router';
+
+// Multiple declarations in same const statement
+// Only collection1 is shared, but both are in same declaration
+
+export const Route = createFileRoute('/test')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-multiple-declarations@component---loader---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-multiple-declarations@component---loader---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..dbc75a6caf9
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-multiple-declarations@component---loader---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,18 @@
+// Multiple declarations in same const statement
+// Only collection1 is shared, but both are in same declaration
+const collection1 = {
+    name: 'todos'
+  },
+  collection2 = {
+    name: 'users'
+  };
+function TestComponent() {
+  return <div>
+      {collection1.name} {collection2.name}
+    </div>;
+}
+const SplitLoader = async () => {
+  return collection1.name;
+};
+export { SplitLoader as loader };
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-multiple-declarations@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-multiple-declarations@errorComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-multiple-variables.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-multiple-variables.tsx
new file mode 100644
index 00000000000..4daa2f2ea77
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-multiple-variables.tsx
@@ -0,0 +1,12 @@
+const $$splitComponentImporter = () => import('shared-multiple-variables.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/react-router';
+const $$splitLoaderImporter = () => import('shared-multiple-variables.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyFn } from '@tanstack/react-router';
+import { createFileRoute } from '@tanstack/react-router';
+
+// Multiple shared variables used by both loader and component
+
+export const Route = createFileRoute('/test')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-multiple-variables@component---loader---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-multiple-variables@component---loader---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..9c780d4347d
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-multiple-variables@component---loader---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,26 @@
+// Multiple shared variables used by both loader and component
+const collection1 = {
+  name: 'todos',
+  preload: async () => {}
+};
+const collection2 = {
+  name: 'users',
+  preload: async () => {}
+};
+const config = {
+  apiUrl: 'http://api.com'
+};
+function TestComponent() {
+  return <div>
+      {collection1.name} {collection2.name} {config.apiUrl}
+    </div>;
+}
+const SplitLoader = async () => {
+  await collection1.preload();
+  await collection2.preload();
+  return {
+    data: 'loaded'
+  };
+};
+export { SplitLoader as loader };
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-multiple-variables@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-multiple-variables@errorComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-nested-closure.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-nested-closure.tsx
new file mode 100644
index 00000000000..a590a5534fe
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-nested-closure.tsx
@@ -0,0 +1,12 @@
+const $$splitComponentImporter = () => import('shared-nested-closure.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/react-router';
+const $$splitLoaderImporter = () => import('shared-nested-closure.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyFn } from '@tanstack/react-router';
+import { createFileRoute } from '@tanstack/react-router';
+
+// Nested closure - ensure we track through closures
+
+export const Route = createFileRoute('/test')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-nested-closure@component---loader---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-nested-closure@component---loader---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..dc28c14a14a
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-nested-closure@component---loader---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,9 @@
+// Nested closure - ensure we track through closures
+const cfg = {
+  api: 'http://api.com'
+};
+const makeLoader = () => () => cfg.api;
+const Component = () => <div>{cfg.api}</div>;
+const SplitLoader = makeLoader();
+export { SplitLoader as loader };
+export { Component as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-nested-closure@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-nested-closure@errorComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-nested-function-usage.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-nested-function-usage.tsx
new file mode 100644
index 00000000000..e39c1fdfc68
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-nested-function-usage.tsx
@@ -0,0 +1,12 @@
+const $$splitComponentImporter = () => import('shared-nested-function-usage.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/react-router';
+const $$splitLoaderImporter = () => import('shared-nested-function-usage.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyFn } from '@tanstack/react-router';
+import { createFileRoute } from '@tanstack/react-router';
+
+// Variable used inside nested function
+
+export const Route = createFileRoute('/test')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-nested-function-usage@component---loader---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-nested-function-usage@component---loader---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..720598b13bd
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-nested-function-usage@component---loader---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,13 @@
+// Variable used inside nested function
+const collection = {
+  name: 'todos',
+  items: []
+};
+function loadData() {
+  return collection.items;
+}
+function TestComponent() {
+  return <div>{collection.name}</div>;
+}
+export { loadData as loader };
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-nested-function-usage@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-nested-function-usage@errorComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-object-with-methods.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-object-with-methods.tsx
new file mode 100644
index 00000000000..710c59abb89
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-object-with-methods.tsx
@@ -0,0 +1,12 @@
+const $$splitComponentImporter = () => import('shared-object-with-methods.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/react-router';
+const $$splitLoaderImporter = () => import('shared-object-with-methods.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyFn } from '@tanstack/react-router';
+import { createFileRoute } from '@tanstack/react-router';
+
+// Object contains methods (functions) - should still be shared as whole object
+
+export const Route = createFileRoute('/test')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-object-with-methods@component---loader---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-object-with-methods@component---loader---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..7ee457ba36d
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-object-with-methods@component---loader---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,18 @@
+// Object contains methods (functions) - should still be shared as whole object
+const api = {
+  endpoint: 'http://api.com',
+  fetch: async () => ({
+    data: 'loaded'
+  }),
+  cache: new Map()
+};
+function TestComponent() {
+  return <div>
+      {api.endpoint} - Cache size: {api.cache.size}
+    </div>;
+}
+const SplitLoader = async () => {
+  return api.fetch();
+};
+export { SplitLoader as loader };
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-object-with-methods@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-object-with-methods@errorComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-partial-declarators.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-partial-declarators.tsx
new file mode 100644
index 00000000000..341ab920e8b
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-partial-declarators.tsx
@@ -0,0 +1,14 @@
+const $$splitComponentImporter = () => import('shared-partial-declarators.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/react-router';
+const $$splitLoaderImporter = () => import('shared-partial-declarators.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyFn } from '@tanstack/react-router';
+import { createFileRoute } from '@tanstack/react-router';
+
+// Multiple declarators in same statement
+// Only 'shared' is used by both loader and component
+// 'a' is only used in component, should NOT be exported
+
+export const Route = createFileRoute('/test')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-partial-declarators@component---loader---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-partial-declarators@component---loader---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..2fe8995815d
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-partial-declarators@component---loader---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,18 @@
+// Multiple declarators in same statement
+// Only 'shared' is used by both loader and component
+// 'a' is only used in component, should NOT be exported
+const a = 1,
+  shared = new Map();
+function TestComponent() {
+  // Uses both shared and a
+  return <div>Count: {shared.size + a}</div>;
+}
+const SplitLoader = async () => {
+  // Only uses shared, not a
+  shared.set('loaded', true);
+  return {
+    data: 'loaded'
+  };
+};
+export { SplitLoader as loader };
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-partial-declarators@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-partial-declarators@errorComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-variable-dependency.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-variable-dependency.tsx
new file mode 100644
index 00000000000..3acd8108140
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-variable-dependency.tsx
@@ -0,0 +1,12 @@
+const $$splitComponentImporter = () => import('shared-variable-dependency.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/react-router';
+const $$splitLoaderImporter = () => import('shared-variable-dependency.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyFn } from '@tanstack/react-router';
+import { createFileRoute } from '@tanstack/react-router';
+
+// Variable references another shared variable
+
+export const Route = createFileRoute('/test')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-variable-dependency@component---loader---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-variable-dependency@component---loader---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..eec1a99efa2
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-variable-dependency@component---loader---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,19 @@
+// Variable references another shared variable
+const baseConfig = {
+  apiUrl: 'http://api.com',
+  timeout: 5000
+};
+const collection = {
+  config: baseConfig,
+  name: 'todos'
+};
+function TestComponent() {
+  return <div>
+      {collection.name} - {baseConfig.apiUrl}
+    </div>;
+}
+const SplitLoader = async () => {
+  return collection.name;
+};
+export { SplitLoader as loader };
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-variable-dependency@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/shared-variable-dependency@errorComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/split-only-variable.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/split-only-variable.tsx
new file mode 100644
index 00000000000..75a15b9b44c
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/split-only-variable.tsx
@@ -0,0 +1,14 @@
+const $$splitComponentImporter = () => import('split-only-variable.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/react-router';
+const $$splitLoaderImporter = () => import('split-only-variable.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyFn } from '@tanstack/react-router';
+import { createFileRoute } from '@tanstack/react-router';
+
+// Variable used ONLY in component (split part), NOT in loader
+// Should NOT be exported from reference file or imported in split file
+const onlySplit = new Map();
+onlySplit.set('key', 'value');
+export const Route = createFileRoute('/test')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/split-only-variable@component---loader---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/split-only-variable@component---loader---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..65dfd7c5ca0
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/split-only-variable@component---loader---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,16 @@
+// Variable used ONLY in component (split part), NOT in loader
+// Should NOT be exported from reference file or imported in split file
+const onlySplit = new Map();
+onlySplit.set('key', 'value');
+function TestComponent() {
+  // Only component uses onlySplit
+  return <div>Size: {onlySplit.size}</div>;
+}
+const SplitLoader = async () => {
+  // Loader doesn't use onlySplit at all
+  return {
+    data: 'loaded'
+  };
+};
+export { SplitLoader as loader };
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/split-only-variable@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/split-only-variable@errorComponent.tsx
new file mode 100644
index 00000000000..90e58d835af
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/react/3-all-combined-errorComponent-separate/split-only-variable@errorComponent.tsx
@@ -0,0 +1,4 @@
+// Variable used ONLY in component (split part), NOT in loader
+// Should NOT be exported from reference file or imported in split file
+const onlySplit = new Map();
+onlySplit.set('key', 'value');
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-alias-chain.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-alias-chain.tsx
new file mode 100644
index 00000000000..182c71ad9cf
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-alias-chain.tsx
@@ -0,0 +1,17 @@
+console.warn("[tanstack-router] These exports from \"shared-alias-chain.tsx\" will not be code-split and will increase your bundle size:\n- alias\nFor the best optimization, these items should either have their export statements removed, or be imported from another location that is not a route file.");
+const $$splitComponentImporter = () => import('shared-alias-chain.tsx?tsr-split=component');
+import { lazyRouteComponent } from '@tanstack/solid-router';
+import { createFileRoute } from '@tanstack/solid-router';
+
+// Alias chain - ensure we track through aliases
+const base = {
+  name: 'collection',
+  items: []
+};
+export const alias = base;
+export const Route = createFileRoute('/test')({
+  loader: async () => {
+    return alias.items;
+  },
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-alias-chain@component.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-alias-chain@component.tsx
new file mode 100644
index 00000000000..e2a6512a1f5
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-alias-chain@component.tsx
@@ -0,0 +1,5 @@
+import { alias } from "shared-alias-chain.tsx"; // Alias chain - ensure we track through aliases
+function TestComponent() {
+  return <div>{alias.name}</div>;
+}
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-alias-chain@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-alias-chain@errorComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-alias-chain@notFoundComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-alias-chain@notFoundComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-already-exported.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-already-exported.tsx
new file mode 100644
index 00000000000..51905847581
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-already-exported.tsx
@@ -0,0 +1,19 @@
+console.warn("[tanstack-router] These exports from \"shared-already-exported.tsx\" will not be code-split and will increase your bundle size:\n- collection\nFor the best optimization, these items should either have their export statements removed, or be imported from another location that is not a route file.");
+const $$splitComponentImporter = () => import('shared-already-exported.tsx?tsr-split=component');
+import { lazyRouteComponent } from '@tanstack/solid-router';
+import { createFileRoute } from '@tanstack/solid-router';
+
+// Already exported variable - should not be double-exported
+export const collection = {
+  name: 'todos',
+  preload: async () => {}
+};
+export const Route = createFileRoute('/test')({
+  loader: async () => {
+    await collection.preload();
+    return {
+      data: 'loaded'
+    };
+  },
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-already-exported@component.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-already-exported@component.tsx
new file mode 100644
index 00000000000..63fdb78e140
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-already-exported@component.tsx
@@ -0,0 +1,6 @@
+// Already exported variable - should not be double-exported
+import { collection } from "shared-already-exported.tsx";
+function TestComponent() {
+  return <div>{collection.name}</div>;
+}
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-already-exported@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-already-exported@errorComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-already-exported@notFoundComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-already-exported@notFoundComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-call-expression.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-call-expression.tsx
new file mode 100644
index 00000000000..fb3b19b9da0
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-call-expression.tsx
@@ -0,0 +1,18 @@
+console.warn("[tanstack-router] These exports from \"shared-call-expression.tsx\" will not be code-split and will increase your bundle size:\n- collection\nFor the best optimization, these items should either have their export statements removed, or be imported from another location that is not a route file.");
+const $$splitComponentImporter = () => import('shared-call-expression.tsx?tsr-split=component');
+import { lazyRouteComponent } from '@tanstack/solid-router';
+import { createFileRoute } from '@tanstack/solid-router';
+
+// Call expression initializers - should still work
+export const collection = {
+  create: (name: string) => ({
+    name,
+    items: []
+  })
+}.create('todos');
+export const Route = createFileRoute('/test')({
+  loader: async () => {
+    return collection.items;
+  },
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-call-expression@component.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-call-expression@component.tsx
new file mode 100644
index 00000000000..281fb56d762
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-call-expression@component.tsx
@@ -0,0 +1,15 @@
+import { collection } from "shared-call-expression.tsx";
+// Call expression initializers - should still work
+
+const query = {
+  from: (table: string) => ({
+    table,
+    filters: []
+  })
+}.from('users');
+function TestComponent() {
+  return <div>
+      {collection.name} - {query.table}
+    </div>;
+}
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-call-expression@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-call-expression@errorComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-call-expression@notFoundComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-call-expression@notFoundComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-destructuring.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-destructuring.tsx
new file mode 100644
index 00000000000..53a8593de42
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-destructuring.tsx
@@ -0,0 +1,20 @@
+console.warn("[tanstack-router] These exports from \"shared-destructuring.tsx\" will not be code-split and will increase your bundle size:\n- apiUrl\nFor the best optimization, these items should either have their export statements removed, or be imported from another location that is not a route file.");
+const $$splitComponentImporter = () => import('shared-destructuring.tsx?tsr-split=component');
+import { lazyRouteComponent } from '@tanstack/solid-router';
+import { createFileRoute } from '@tanstack/solid-router';
+
+// Destructuring - ensure we promote the right binding
+const cfg = {
+  apiUrl: 'http://api.com',
+  timeout: 5000
+};
+export const {
+  apiUrl
+} = cfg;
+export const Route = createFileRoute('/test')({
+  loader: async () => {
+    // Uses the destructured binding
+    return fetch(apiUrl).then(r => r.json());
+  },
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-destructuring@component.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-destructuring@component.tsx
new file mode 100644
index 00000000000..b7ed1ffde9b
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-destructuring@component.tsx
@@ -0,0 +1,13 @@
+// Destructuring - ensure we promote the right binding
+const cfg = {
+  apiUrl: 'http://api.com',
+  timeout: 5000
+};
+const {
+  apiUrl
+} = cfg;
+function TestComponent() {
+  // Also uses the destructured binding
+  return <div>API: {apiUrl}</div>;
+}
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-destructuring@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-destructuring@errorComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-destructuring@notFoundComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-destructuring@notFoundComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-let-reassignment.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-let-reassignment.tsx
new file mode 100644
index 00000000000..52d0e59748c
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-let-reassignment.tsx
@@ -0,0 +1,22 @@
+console.warn("[tanstack-router] These exports from \"shared-let-reassignment.tsx\" will not be code-split and will increase your bundle size:\n- store\nFor the best optimization, these items should either have their export statements removed, or be imported from another location that is not a route file.");
+const $$splitComponentImporter = () => import('shared-let-reassignment.tsx?tsr-split=component');
+import { lazyRouteComponent } from '@tanstack/solid-router';
+import { createFileRoute } from '@tanstack/solid-router';
+
+// let with reassignment - tests live binding behavior
+export let store = {
+  count: 0
+};
+store = {
+  count: 1,
+  updated: true
+};
+export const Route = createFileRoute('/test')({
+  loader: async () => {
+    store.count++;
+    return {
+      data: 'loaded'
+    };
+  },
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-let-reassignment@component.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-let-reassignment@component.tsx
new file mode 100644
index 00000000000..cd88b5634c8
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-let-reassignment@component.tsx
@@ -0,0 +1,12 @@
+// let with reassignment - tests live binding behavior
+let store = {
+  count: 0
+};
+store = {
+  count: 1,
+  updated: true
+};
+function TestComponent() {
+  return <div>Count: {store.count}</div>;
+}
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-let-reassignment@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-let-reassignment@errorComponent.tsx
new file mode 100644
index 00000000000..f52dfd0d532
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-let-reassignment@errorComponent.tsx
@@ -0,0 +1,8 @@
+// let with reassignment - tests live binding behavior
+let store = {
+  count: 0
+};
+store = {
+  count: 1,
+  updated: true
+};
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-let-reassignment@notFoundComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-let-reassignment@notFoundComponent.tsx
new file mode 100644
index 00000000000..f52dfd0d532
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-let-reassignment@notFoundComponent.tsx
@@ -0,0 +1,8 @@
+// let with reassignment - tests live binding behavior
+let store = {
+  count: 0
+};
+store = {
+  count: 1,
+  updated: true
+};
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-module-variable.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-module-variable.tsx
new file mode 100644
index 00000000000..dde12e452f3
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-module-variable.tsx
@@ -0,0 +1,22 @@
+console.warn("[tanstack-router] These exports from \"shared-module-variable.tsx\" will not be code-split and will increase your bundle size:\n- collection\nFor the best optimization, these items should either have their export statements removed, or be imported from another location that is not a route file.");
+const $$splitComponentImporter = () => import('shared-module-variable.tsx?tsr-split=component');
+import { lazyRouteComponent } from '@tanstack/solid-router';
+import { createFileRoute } from '@tanstack/solid-router';
+
+// Module-level variable used in both loader and component
+// This simulates a collection/query that should only be initialized once
+export const collection = {
+  name: 'todos',
+  preload: async () => {}
+}; // Side effect at module level - should only run once
+console.log('Module initialized:', collection.name);
+export const Route = createFileRoute('/todos')({
+  loader: async () => {
+    // Use collection in loader
+    await collection.preload();
+    return {
+      data: 'loaded'
+    };
+  },
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-module-variable@component.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-module-variable@component.tsx
new file mode 100644
index 00000000000..33cf4220c43
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-module-variable@component.tsx
@@ -0,0 +1,11 @@
+import { collection } from "shared-module-variable.tsx";
+// Module-level variable used in both loader and component
+// This simulates a collection/query that should only be initialized once
+
+// Side effect at module level - should only run once
+console.log('Module initialized:', collection.name);
+function TodosComponent() {
+  // Use collection in component
+  return <div>{collection.name}</div>;
+}
+export { TodosComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-module-variable@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-module-variable@errorComponent.tsx
new file mode 100644
index 00000000000..98f43167ce3
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-module-variable@errorComponent.tsx
@@ -0,0 +1,6 @@
+import { collection } from "shared-module-variable.tsx";
+// Module-level variable used in both loader and component
+// This simulates a collection/query that should only be initialized once
+
+// Side effect at module level - should only run once
+console.log('Module initialized:', collection.name);
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-module-variable@notFoundComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-module-variable@notFoundComponent.tsx
new file mode 100644
index 00000000000..98f43167ce3
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-module-variable@notFoundComponent.tsx
@@ -0,0 +1,6 @@
+import { collection } from "shared-module-variable.tsx";
+// Module-level variable used in both loader and component
+// This simulates a collection/query that should only be initialized once
+
+// Side effect at module level - should only run once
+console.log('Module initialized:', collection.name);
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-multiple-declarations.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-multiple-declarations.tsx
new file mode 100644
index 00000000000..0b1f0a84a1a
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-multiple-declarations.tsx
@@ -0,0 +1,16 @@
+console.warn("[tanstack-router] These exports from \"shared-multiple-declarations.tsx\" will not be code-split and will increase your bundle size:\n- collection1\nFor the best optimization, these items should either have their export statements removed, or be imported from another location that is not a route file.");
+const $$splitComponentImporter = () => import('shared-multiple-declarations.tsx?tsr-split=component');
+import { lazyRouteComponent } from '@tanstack/solid-router';
+import { createFileRoute } from '@tanstack/solid-router';
+
+// Multiple declarations in same const statement
+// Only collection1 is shared, but both are in same declaration
+export const collection1 = {
+  name: 'todos'
+};
+export const Route = createFileRoute('/test')({
+  loader: async () => {
+    return collection1.name;
+  },
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-multiple-declarations@component.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-multiple-declarations@component.tsx
new file mode 100644
index 00000000000..a61b33f2114
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-multiple-declarations@component.tsx
@@ -0,0 +1,12 @@
+import { collection1 } from "shared-multiple-declarations.tsx";
+// Multiple declarations in same const statement
+// Only collection1 is shared, but both are in same declaration
+const collection2 = {
+  name: 'users'
+};
+function TestComponent() {
+  return <div>
+      {collection1.name} {collection2.name}
+    </div>;
+}
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-multiple-declarations@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-multiple-declarations@errorComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-multiple-declarations@notFoundComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-multiple-declarations@notFoundComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-multiple-variables.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-multiple-variables.tsx
new file mode 100644
index 00000000000..7e49bce9376
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-multiple-variables.tsx
@@ -0,0 +1,24 @@
+console.warn("[tanstack-router] These exports from \"shared-multiple-variables.tsx\" will not be code-split and will increase your bundle size:\n- collection1\n- collection2\nFor the best optimization, these items should either have their export statements removed, or be imported from another location that is not a route file.");
+const $$splitComponentImporter = () => import('shared-multiple-variables.tsx?tsr-split=component');
+import { lazyRouteComponent } from '@tanstack/solid-router';
+import { createFileRoute } from '@tanstack/solid-router';
+
+// Multiple shared variables used by both loader and component
+export const collection1 = {
+  name: 'todos',
+  preload: async () => {}
+};
+export const collection2 = {
+  name: 'users',
+  preload: async () => {}
+};
+export const Route = createFileRoute('/test')({
+  loader: async () => {
+    await collection1.preload();
+    await collection2.preload();
+    return {
+      data: 'loaded'
+    };
+  },
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-multiple-variables@component.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-multiple-variables@component.tsx
new file mode 100644
index 00000000000..93a52cdc277
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-multiple-variables@component.tsx
@@ -0,0 +1,12 @@
+import { collection1, collection2 } from "shared-multiple-variables.tsx";
+// Multiple shared variables used by both loader and component
+
+const config = {
+  apiUrl: 'http://api.com'
+};
+function TestComponent() {
+  return <div>
+      {collection1.name} {collection2.name} {config.apiUrl}
+    </div>;
+}
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-multiple-variables@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-multiple-variables@errorComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-multiple-variables@notFoundComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-multiple-variables@notFoundComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-nested-closure.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-nested-closure.tsx
new file mode 100644
index 00000000000..f4919a88723
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-nested-closure.tsx
@@ -0,0 +1,13 @@
+const $$splitComponentImporter = () => import('shared-nested-closure.tsx?tsr-split=component');
+import { lazyRouteComponent } from '@tanstack/solid-router';
+import { createFileRoute } from '@tanstack/solid-router';
+
+// Nested closure - ensure we track through closures
+const cfg = {
+  api: 'http://api.com'
+};
+const makeLoader = () => () => cfg.api;
+export const Route = createFileRoute('/test')({
+  loader: makeLoader(),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-nested-closure@component.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-nested-closure@component.tsx
new file mode 100644
index 00000000000..059366b9fce
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-nested-closure@component.tsx
@@ -0,0 +1,6 @@
+// Nested closure - ensure we track through closures
+const cfg = {
+  api: 'http://api.com'
+};
+const Component = () => <div>{cfg.api}</div>;
+export { Component as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-nested-closure@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-nested-closure@errorComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-nested-closure@notFoundComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-nested-closure@notFoundComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-nested-function-usage.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-nested-function-usage.tsx
new file mode 100644
index 00000000000..a71dd5f9074
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-nested-function-usage.tsx
@@ -0,0 +1,17 @@
+console.warn("[tanstack-router] These exports from \"shared-nested-function-usage.tsx\" will not be code-split and will increase your bundle size:\n- collection\nFor the best optimization, these items should either have their export statements removed, or be imported from another location that is not a route file.");
+const $$splitComponentImporter = () => import('shared-nested-function-usage.tsx?tsr-split=component');
+import { lazyRouteComponent } from '@tanstack/solid-router';
+import { createFileRoute } from '@tanstack/solid-router';
+
+// Variable used inside nested function
+export const collection = {
+  name: 'todos',
+  items: []
+};
+function loadData() {
+  return collection.items;
+}
+export const Route = createFileRoute('/test')({
+  loader: loadData,
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-nested-function-usage@component.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-nested-function-usage@component.tsx
new file mode 100644
index 00000000000..46c364af7fb
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-nested-function-usage@component.tsx
@@ -0,0 +1,5 @@
+import { collection } from "shared-nested-function-usage.tsx"; // Variable used inside nested function
+function TestComponent() {
+  return <div>{collection.name}</div>;
+}
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-nested-function-usage@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-nested-function-usage@errorComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-nested-function-usage@notFoundComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-nested-function-usage@notFoundComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-object-with-methods.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-object-with-methods.tsx
new file mode 100644
index 00000000000..cc655ca7829
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-object-with-methods.tsx
@@ -0,0 +1,19 @@
+console.warn("[tanstack-router] These exports from \"shared-object-with-methods.tsx\" will not be code-split and will increase your bundle size:\n- api\nFor the best optimization, these items should either have their export statements removed, or be imported from another location that is not a route file.");
+const $$splitComponentImporter = () => import('shared-object-with-methods.tsx?tsr-split=component');
+import { lazyRouteComponent } from '@tanstack/solid-router';
+import { createFileRoute } from '@tanstack/solid-router';
+
+// Object contains methods (functions) - should still be shared as whole object
+export const api = {
+  endpoint: 'http://api.com',
+  fetch: async () => ({
+    data: 'loaded'
+  }),
+  cache: new Map()
+};
+export const Route = createFileRoute('/test')({
+  loader: async () => {
+    return api.fetch();
+  },
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-object-with-methods@component.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-object-with-methods@component.tsx
new file mode 100644
index 00000000000..772c97f84cd
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-object-with-methods@component.tsx
@@ -0,0 +1,7 @@
+import { api } from "shared-object-with-methods.tsx"; // Object contains methods (functions) - should still be shared as whole object
+function TestComponent() {
+  return <div>
+      {api.endpoint} - Cache size: {api.cache.size}
+    </div>;
+}
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-object-with-methods@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-object-with-methods@errorComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-object-with-methods@notFoundComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-object-with-methods@notFoundComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-partial-declarators.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-partial-declarators.tsx
new file mode 100644
index 00000000000..4ed3c8ddab2
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-partial-declarators.tsx
@@ -0,0 +1,19 @@
+console.warn("[tanstack-router] These exports from \"shared-partial-declarators.tsx\" will not be code-split and will increase your bundle size:\n- shared\nFor the best optimization, these items should either have their export statements removed, or be imported from another location that is not a route file.");
+const $$splitComponentImporter = () => import('shared-partial-declarators.tsx?tsr-split=component');
+import { lazyRouteComponent } from '@tanstack/solid-router';
+import { createFileRoute } from '@tanstack/solid-router';
+
+// Multiple declarators in same statement
+// Only 'shared' is used by both loader and component
+// 'a' is only used in component, should NOT be exported
+export const shared = new Map();
+export const Route = createFileRoute('/test')({
+  loader: async () => {
+    // Only uses shared, not a
+    shared.set('loaded', true);
+    return {
+      data: 'loaded'
+    };
+  },
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-partial-declarators@component.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-partial-declarators@component.tsx
new file mode 100644
index 00000000000..6e219600a61
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-partial-declarators@component.tsx
@@ -0,0 +1,10 @@
+import { shared } from "shared-partial-declarators.tsx";
+// Multiple declarators in same statement
+// Only 'shared' is used by both loader and component
+// 'a' is only used in component, should NOT be exported
+const a = 1;
+function TestComponent() {
+  // Uses both shared and a
+  return <div>Count: {shared.size + a}</div>;
+}
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-partial-declarators@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-partial-declarators@errorComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-partial-declarators@notFoundComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-partial-declarators@notFoundComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-variable-dependency.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-variable-dependency.tsx
new file mode 100644
index 00000000000..79175de4879
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-variable-dependency.tsx
@@ -0,0 +1,20 @@
+console.warn("[tanstack-router] These exports from \"shared-variable-dependency.tsx\" will not be code-split and will increase your bundle size:\n- collection\nFor the best optimization, these items should either have their export statements removed, or be imported from another location that is not a route file.");
+const $$splitComponentImporter = () => import('shared-variable-dependency.tsx?tsr-split=component');
+import { lazyRouteComponent } from '@tanstack/solid-router';
+import { createFileRoute } from '@tanstack/solid-router';
+
+// Variable references another shared variable
+const baseConfig = {
+  apiUrl: 'http://api.com',
+  timeout: 5000
+};
+export const collection = {
+  config: baseConfig,
+  name: 'todos'
+};
+export const Route = createFileRoute('/test')({
+  loader: async () => {
+    return collection.name;
+  },
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-variable-dependency@component.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-variable-dependency@component.tsx
new file mode 100644
index 00000000000..aa18e68770e
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-variable-dependency@component.tsx
@@ -0,0 +1,12 @@
+import { collection } from "shared-variable-dependency.tsx";
+// Variable references another shared variable
+const baseConfig = {
+  apiUrl: 'http://api.com',
+  timeout: 5000
+};
+function TestComponent() {
+  return <div>
+      {collection.name} - {baseConfig.apiUrl}
+    </div>;
+}
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-variable-dependency@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-variable-dependency@errorComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-variable-dependency@notFoundComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/shared-variable-dependency@notFoundComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/split-only-variable.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/split-only-variable.tsx
new file mode 100644
index 00000000000..5741c5c0b59
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/split-only-variable.tsx
@@ -0,0 +1,17 @@
+const $$splitComponentImporter = () => import('split-only-variable.tsx?tsr-split=component');
+import { lazyRouteComponent } from '@tanstack/solid-router';
+import { createFileRoute } from '@tanstack/solid-router';
+
+// Variable used ONLY in component (split part), NOT in loader
+// Should NOT be exported from reference file or imported in split file
+const onlySplit = new Map();
+onlySplit.set('key', 'value');
+export const Route = createFileRoute('/test')({
+  loader: async () => {
+    // Loader doesn't use onlySplit at all
+    return {
+      data: 'loaded'
+    };
+  },
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/split-only-variable@component.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/split-only-variable@component.tsx
new file mode 100644
index 00000000000..761bb11e737
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/split-only-variable@component.tsx
@@ -0,0 +1,9 @@
+// Variable used ONLY in component (split part), NOT in loader
+// Should NOT be exported from reference file or imported in split file
+const onlySplit = new Map();
+onlySplit.set('key', 'value');
+function TestComponent() {
+  // Only component uses onlySplit
+  return <div>Size: {onlySplit.size}</div>;
+}
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/split-only-variable@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/split-only-variable@errorComponent.tsx
new file mode 100644
index 00000000000..90e58d835af
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/split-only-variable@errorComponent.tsx
@@ -0,0 +1,4 @@
+// Variable used ONLY in component (split part), NOT in loader
+// Should NOT be exported from reference file or imported in split file
+const onlySplit = new Map();
+onlySplit.set('key', 'value');
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/split-only-variable@notFoundComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/split-only-variable@notFoundComponent.tsx
new file mode 100644
index 00000000000..90e58d835af
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/1-default/split-only-variable@notFoundComponent.tsx
@@ -0,0 +1,4 @@
+// Variable used ONLY in component (split part), NOT in loader
+// Should NOT be exported from reference file or imported in split file
+const onlySplit = new Map();
+onlySplit.set('key', 'value');
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-alias-chain.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-alias-chain.tsx
new file mode 100644
index 00000000000..5e5a8775e03
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-alias-chain.tsx
@@ -0,0 +1,12 @@
+const $$splitComponentImporter = () => import('shared-alias-chain.tsx?tsr-split=component---errorComponent---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/solid-router';
+const $$splitLoaderImporter = () => import('shared-alias-chain.tsx?tsr-split=loader');
+import { lazyFn } from '@tanstack/solid-router';
+import { createFileRoute } from '@tanstack/solid-router';
+
+// Alias chain - ensure we track through aliases
+
+export const Route = createFileRoute('/test')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-alias-chain@component---errorComponent---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-alias-chain@component---errorComponent---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..a96a444daf7
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-alias-chain@component---errorComponent---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,10 @@
+// Alias chain - ensure we track through aliases
+const base = {
+  name: 'collection',
+  items: []
+};
+const alias = base;
+function TestComponent() {
+  return <div>{alias.name}</div>;
+}
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-alias-chain@loader.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-alias-chain@loader.tsx
new file mode 100644
index 00000000000..a5d32cf40db
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-alias-chain@loader.tsx
@@ -0,0 +1,10 @@
+// Alias chain - ensure we track through aliases
+const base = {
+  name: 'collection',
+  items: []
+};
+const alias = base;
+const SplitLoader = async () => {
+  return alias.items;
+};
+export { SplitLoader as loader };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-already-exported.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-already-exported.tsx
new file mode 100644
index 00000000000..ff00100e3df
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-already-exported.tsx
@@ -0,0 +1,15 @@
+const $$splitComponentImporter = () => import('shared-already-exported.tsx?tsr-split=component---errorComponent---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/solid-router';
+const $$splitLoaderImporter = () => import('shared-already-exported.tsx?tsr-split=loader');
+import { lazyFn } from '@tanstack/solid-router';
+import { createFileRoute } from '@tanstack/solid-router';
+
+// Already exported variable - should not be double-exported
+export const collection = {
+  name: 'todos',
+  preload: async () => {}
+};
+export const Route = createFileRoute('/test')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-already-exported@component---errorComponent---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-already-exported@component---errorComponent---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..63fdb78e140
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-already-exported@component---errorComponent---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,6 @@
+// Already exported variable - should not be double-exported
+import { collection } from "shared-already-exported.tsx";
+function TestComponent() {
+  return <div>{collection.name}</div>;
+}
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-already-exported@loader.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-already-exported@loader.tsx
new file mode 100644
index 00000000000..f7ef905c211
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-already-exported@loader.tsx
@@ -0,0 +1,9 @@
+// Already exported variable - should not be double-exported
+import { collection } from "shared-already-exported.tsx";
+const SplitLoader = async () => {
+  await collection.preload();
+  return {
+    data: 'loaded'
+  };
+};
+export { SplitLoader as loader };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-call-expression.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-call-expression.tsx
new file mode 100644
index 00000000000..992aa50dda9
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-call-expression.tsx
@@ -0,0 +1,12 @@
+const $$splitComponentImporter = () => import('shared-call-expression.tsx?tsr-split=component---errorComponent---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/solid-router';
+const $$splitLoaderImporter = () => import('shared-call-expression.tsx?tsr-split=loader');
+import { lazyFn } from '@tanstack/solid-router';
+import { createFileRoute } from '@tanstack/solid-router';
+
+// Call expression initializers - should still work
+
+export const Route = createFileRoute('/test')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-call-expression@component---errorComponent---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-call-expression@component---errorComponent---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..b0932a66400
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-call-expression@component---errorComponent---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,19 @@
+// Call expression initializers - should still work
+const collection = {
+  create: (name: string) => ({
+    name,
+    items: []
+  })
+}.create('todos');
+const query = {
+  from: (table: string) => ({
+    table,
+    filters: []
+  })
+}.from('users');
+function TestComponent() {
+  return <div>
+      {collection.name} - {query.table}
+    </div>;
+}
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-call-expression@loader.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-call-expression@loader.tsx
new file mode 100644
index 00000000000..a1e4838a861
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-call-expression@loader.tsx
@@ -0,0 +1,11 @@
+// Call expression initializers - should still work
+const collection = {
+  create: (name: string) => ({
+    name,
+    items: []
+  })
+}.create('todos');
+const SplitLoader = async () => {
+  return collection.items;
+};
+export { SplitLoader as loader };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-destructuring.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-destructuring.tsx
new file mode 100644
index 00000000000..c413e931518
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-destructuring.tsx
@@ -0,0 +1,12 @@
+const $$splitComponentImporter = () => import('shared-destructuring.tsx?tsr-split=component---errorComponent---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/solid-router';
+const $$splitLoaderImporter = () => import('shared-destructuring.tsx?tsr-split=loader');
+import { lazyFn } from '@tanstack/solid-router';
+import { createFileRoute } from '@tanstack/solid-router';
+
+// Destructuring - ensure we promote the right binding
+
+export const Route = createFileRoute('/test')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-destructuring@component---errorComponent---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-destructuring@component---errorComponent---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..b7ed1ffde9b
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-destructuring@component---errorComponent---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,13 @@
+// Destructuring - ensure we promote the right binding
+const cfg = {
+  apiUrl: 'http://api.com',
+  timeout: 5000
+};
+const {
+  apiUrl
+} = cfg;
+function TestComponent() {
+  // Also uses the destructured binding
+  return <div>API: {apiUrl}</div>;
+}
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-destructuring@loader.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-destructuring@loader.tsx
new file mode 100644
index 00000000000..6c138455e6b
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-destructuring@loader.tsx
@@ -0,0 +1,13 @@
+// Destructuring - ensure we promote the right binding
+const cfg = {
+  apiUrl: 'http://api.com',
+  timeout: 5000
+};
+const {
+  apiUrl
+} = cfg;
+const SplitLoader = async () => {
+  // Uses the destructured binding
+  return fetch(apiUrl).then(r => r.json());
+};
+export { SplitLoader as loader };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-let-reassignment.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-let-reassignment.tsx
new file mode 100644
index 00000000000..26b129830ff
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-let-reassignment.tsx
@@ -0,0 +1,18 @@
+const $$splitComponentImporter = () => import('shared-let-reassignment.tsx?tsr-split=component---errorComponent---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/solid-router';
+const $$splitLoaderImporter = () => import('shared-let-reassignment.tsx?tsr-split=loader');
+import { lazyFn } from '@tanstack/solid-router';
+import { createFileRoute } from '@tanstack/solid-router';
+
+// let with reassignment - tests live binding behavior
+let store = {
+  count: 0
+};
+store = {
+  count: 1,
+  updated: true
+};
+export const Route = createFileRoute('/test')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-let-reassignment@component---errorComponent---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-let-reassignment@component---errorComponent---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..cd88b5634c8
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-let-reassignment@component---errorComponent---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,12 @@
+// let with reassignment - tests live binding behavior
+let store = {
+  count: 0
+};
+store = {
+  count: 1,
+  updated: true
+};
+function TestComponent() {
+  return <div>Count: {store.count}</div>;
+}
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-let-reassignment@component.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-let-reassignment@component.tsx
new file mode 100644
index 00000000000..f397a814ed8
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-let-reassignment@component.tsx
@@ -0,0 +1,12 @@
+// let with reassignment - tests live binding behavior
+let store = {
+  count: 0
+};
+store = {
+  count: 1,
+  updated: true
+};
+function TestComponent() {
+  return <div>Count: {store.count}</div>;
+}
+export { TestComponent as component };
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-let-reassignment@loader.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-let-reassignment@loader.tsx
new file mode 100644
index 00000000000..89f2fced8d8
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-let-reassignment@loader.tsx
@@ -0,0 +1,15 @@
+// let with reassignment - tests live binding behavior
+let store = {
+  count: 0
+};
+store = {
+  count: 1,
+  updated: true
+};
+const SplitLoader = async () => {
+  store.count++;
+  return {
+    data: 'loaded'
+  };
+};
+export { SplitLoader as loader };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-module-variable.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-module-variable.tsx
new file mode 100644
index 00000000000..8cbad6d746c
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-module-variable.tsx
@@ -0,0 +1,19 @@
+const $$splitComponentImporter = () => import('shared-module-variable.tsx?tsr-split=component---errorComponent---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/solid-router';
+const $$splitLoaderImporter = () => import('shared-module-variable.tsx?tsr-split=loader');
+import { lazyFn } from '@tanstack/solid-router';
+import { createFileRoute } from '@tanstack/solid-router';
+
+// Module-level variable used in both loader and component
+// This simulates a collection/query that should only be initialized once
+const collection = {
+  name: 'todos',
+  preload: async () => {}
+};
+
+// Side effect at module level - should only run once
+console.log('Module initialized:', collection.name);
+export const Route = createFileRoute('/todos')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-module-variable@component---errorComponent---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-module-variable@component---errorComponent---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..f53fff41701
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-module-variable@component---errorComponent---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,14 @@
+// Module-level variable used in both loader and component
+// This simulates a collection/query that should only be initialized once
+const collection = {
+  name: 'todos',
+  preload: async () => {}
+};
+
+// Side effect at module level - should only run once
+console.log('Module initialized:', collection.name);
+function TodosComponent() {
+  // Use collection in component
+  return <div>{collection.name}</div>;
+}
+export { TodosComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-module-variable@loader.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-module-variable@loader.tsx
new file mode 100644
index 00000000000..1d52dc1b192
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-module-variable@loader.tsx
@@ -0,0 +1,17 @@
+// Module-level variable used in both loader and component
+// This simulates a collection/query that should only be initialized once
+const collection = {
+  name: 'todos',
+  preload: async () => {}
+};
+
+// Side effect at module level - should only run once
+console.log('Module initialized:', collection.name);
+const SplitLoader = async () => {
+  // Use collection in loader
+  await collection.preload();
+  return {
+    data: 'loaded'
+  };
+};
+export { SplitLoader as loader };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-multiple-declarations.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-multiple-declarations.tsx
new file mode 100644
index 00000000000..c299ba8e343
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-multiple-declarations.tsx
@@ -0,0 +1,13 @@
+const $$splitComponentImporter = () => import('shared-multiple-declarations.tsx?tsr-split=component---errorComponent---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/solid-router';
+const $$splitLoaderImporter = () => import('shared-multiple-declarations.tsx?tsr-split=loader');
+import { lazyFn } from '@tanstack/solid-router';
+import { createFileRoute } from '@tanstack/solid-router';
+
+// Multiple declarations in same const statement
+// Only collection1 is shared, but both are in same declaration
+
+export const Route = createFileRoute('/test')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-multiple-declarations@component---errorComponent---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-multiple-declarations@component---errorComponent---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..c103abe982e
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-multiple-declarations@component---errorComponent---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,14 @@
+// Multiple declarations in same const statement
+// Only collection1 is shared, but both are in same declaration
+const collection1 = {
+    name: 'todos'
+  },
+  collection2 = {
+    name: 'users'
+  };
+function TestComponent() {
+  return <div>
+      {collection1.name} {collection2.name}
+    </div>;
+}
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-multiple-declarations@loader.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-multiple-declarations@loader.tsx
new file mode 100644
index 00000000000..ffa805a6f6e
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-multiple-declarations@loader.tsx
@@ -0,0 +1,9 @@
+// Multiple declarations in same const statement
+// Only collection1 is shared, but both are in same declaration
+const collection1 = {
+  name: 'todos'
+};
+const SplitLoader = async () => {
+  return collection1.name;
+};
+export { SplitLoader as loader };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-multiple-variables.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-multiple-variables.tsx
new file mode 100644
index 00000000000..9ad7427d74a
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-multiple-variables.tsx
@@ -0,0 +1,12 @@
+const $$splitComponentImporter = () => import('shared-multiple-variables.tsx?tsr-split=component---errorComponent---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/solid-router';
+const $$splitLoaderImporter = () => import('shared-multiple-variables.tsx?tsr-split=loader');
+import { lazyFn } from '@tanstack/solid-router';
+import { createFileRoute } from '@tanstack/solid-router';
+
+// Multiple shared variables used by both loader and component
+
+export const Route = createFileRoute('/test')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-multiple-variables@component---errorComponent---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-multiple-variables@component---errorComponent---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..6bd0c027294
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-multiple-variables@component---errorComponent---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,18 @@
+// Multiple shared variables used by both loader and component
+const collection1 = {
+  name: 'todos',
+  preload: async () => {}
+};
+const collection2 = {
+  name: 'users',
+  preload: async () => {}
+};
+const config = {
+  apiUrl: 'http://api.com'
+};
+function TestComponent() {
+  return <div>
+      {collection1.name} {collection2.name} {config.apiUrl}
+    </div>;
+}
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-multiple-variables@loader.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-multiple-variables@loader.tsx
new file mode 100644
index 00000000000..3a65c044151
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-multiple-variables@loader.tsx
@@ -0,0 +1,17 @@
+// Multiple shared variables used by both loader and component
+const collection1 = {
+  name: 'todos',
+  preload: async () => {}
+};
+const collection2 = {
+  name: 'users',
+  preload: async () => {}
+};
+const SplitLoader = async () => {
+  await collection1.preload();
+  await collection2.preload();
+  return {
+    data: 'loaded'
+  };
+};
+export { SplitLoader as loader };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-nested-closure.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-nested-closure.tsx
new file mode 100644
index 00000000000..2049d57035f
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-nested-closure.tsx
@@ -0,0 +1,12 @@
+const $$splitComponentImporter = () => import('shared-nested-closure.tsx?tsr-split=component---errorComponent---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/solid-router';
+const $$splitLoaderImporter = () => import('shared-nested-closure.tsx?tsr-split=loader');
+import { lazyFn } from '@tanstack/solid-router';
+import { createFileRoute } from '@tanstack/solid-router';
+
+// Nested closure - ensure we track through closures
+
+export const Route = createFileRoute('/test')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-nested-closure@component---errorComponent---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-nested-closure@component---errorComponent---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..059366b9fce
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-nested-closure@component---errorComponent---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,6 @@
+// Nested closure - ensure we track through closures
+const cfg = {
+  api: 'http://api.com'
+};
+const Component = () => <div>{cfg.api}</div>;
+export { Component as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-nested-closure@loader.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-nested-closure@loader.tsx
new file mode 100644
index 00000000000..f1cd7767dbb
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-nested-closure@loader.tsx
@@ -0,0 +1,7 @@
+// Nested closure - ensure we track through closures
+const cfg = {
+  api: 'http://api.com'
+};
+const makeLoader = () => () => cfg.api;
+const SplitLoader = makeLoader();
+export { SplitLoader as loader };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-nested-function-usage.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-nested-function-usage.tsx
new file mode 100644
index 00000000000..ee30e8c633e
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-nested-function-usage.tsx
@@ -0,0 +1,12 @@
+const $$splitComponentImporter = () => import('shared-nested-function-usage.tsx?tsr-split=component---errorComponent---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/solid-router';
+const $$splitLoaderImporter = () => import('shared-nested-function-usage.tsx?tsr-split=loader');
+import { lazyFn } from '@tanstack/solid-router';
+import { createFileRoute } from '@tanstack/solid-router';
+
+// Variable used inside nested function
+
+export const Route = createFileRoute('/test')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-nested-function-usage@component---errorComponent---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-nested-function-usage@component---errorComponent---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..247601d8ec3
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-nested-function-usage@component---errorComponent---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,9 @@
+// Variable used inside nested function
+const collection = {
+  name: 'todos',
+  items: []
+};
+function TestComponent() {
+  return <div>{collection.name}</div>;
+}
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-nested-function-usage@loader.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-nested-function-usage@loader.tsx
new file mode 100644
index 00000000000..78b8d0a7e47
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-nested-function-usage@loader.tsx
@@ -0,0 +1,9 @@
+// Variable used inside nested function
+const collection = {
+  name: 'todos',
+  items: []
+};
+function loadData() {
+  return collection.items;
+}
+export { loadData as loader };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-object-with-methods.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-object-with-methods.tsx
new file mode 100644
index 00000000000..3b9a8008094
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-object-with-methods.tsx
@@ -0,0 +1,12 @@
+const $$splitComponentImporter = () => import('shared-object-with-methods.tsx?tsr-split=component---errorComponent---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/solid-router';
+const $$splitLoaderImporter = () => import('shared-object-with-methods.tsx?tsr-split=loader');
+import { lazyFn } from '@tanstack/solid-router';
+import { createFileRoute } from '@tanstack/solid-router';
+
+// Object contains methods (functions) - should still be shared as whole object
+
+export const Route = createFileRoute('/test')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-object-with-methods@component---errorComponent---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-object-with-methods@component---errorComponent---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..0b87b4d5576
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-object-with-methods@component---errorComponent---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,14 @@
+// Object contains methods (functions) - should still be shared as whole object
+const api = {
+  endpoint: 'http://api.com',
+  fetch: async () => ({
+    data: 'loaded'
+  }),
+  cache: new Map()
+};
+function TestComponent() {
+  return <div>
+      {api.endpoint} - Cache size: {api.cache.size}
+    </div>;
+}
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-object-with-methods@loader.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-object-with-methods@loader.tsx
new file mode 100644
index 00000000000..53f950387de
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-object-with-methods@loader.tsx
@@ -0,0 +1,12 @@
+// Object contains methods (functions) - should still be shared as whole object
+const api = {
+  endpoint: 'http://api.com',
+  fetch: async () => ({
+    data: 'loaded'
+  }),
+  cache: new Map()
+};
+const SplitLoader = async () => {
+  return api.fetch();
+};
+export { SplitLoader as loader };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-partial-declarators.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-partial-declarators.tsx
new file mode 100644
index 00000000000..5c2291e93af
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-partial-declarators.tsx
@@ -0,0 +1,14 @@
+const $$splitComponentImporter = () => import('shared-partial-declarators.tsx?tsr-split=component---errorComponent---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/solid-router';
+const $$splitLoaderImporter = () => import('shared-partial-declarators.tsx?tsr-split=loader');
+import { lazyFn } from '@tanstack/solid-router';
+import { createFileRoute } from '@tanstack/solid-router';
+
+// Multiple declarators in same statement
+// Only 'shared' is used by both loader and component
+// 'a' is only used in component, should NOT be exported
+
+export const Route = createFileRoute('/test')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-partial-declarators@component---errorComponent---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-partial-declarators@component---errorComponent---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..a6005a94bb0
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-partial-declarators@component---errorComponent---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,10 @@
+// Multiple declarators in same statement
+// Only 'shared' is used by both loader and component
+// 'a' is only used in component, should NOT be exported
+const a = 1,
+  shared = new Map();
+function TestComponent() {
+  // Uses both shared and a
+  return <div>Count: {shared.size + a}</div>;
+}
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-partial-declarators@loader.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-partial-declarators@loader.tsx
new file mode 100644
index 00000000000..3a13615d89c
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-partial-declarators@loader.tsx
@@ -0,0 +1,12 @@
+// Multiple declarators in same statement
+// Only 'shared' is used by both loader and component
+// 'a' is only used in component, should NOT be exported
+const shared = new Map();
+const SplitLoader = async () => {
+  // Only uses shared, not a
+  shared.set('loaded', true);
+  return {
+    data: 'loaded'
+  };
+};
+export { SplitLoader as loader };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-variable-dependency.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-variable-dependency.tsx
new file mode 100644
index 00000000000..58f7df01677
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-variable-dependency.tsx
@@ -0,0 +1,12 @@
+const $$splitComponentImporter = () => import('shared-variable-dependency.tsx?tsr-split=component---errorComponent---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/solid-router';
+const $$splitLoaderImporter = () => import('shared-variable-dependency.tsx?tsr-split=loader');
+import { lazyFn } from '@tanstack/solid-router';
+import { createFileRoute } from '@tanstack/solid-router';
+
+// Variable references another shared variable
+
+export const Route = createFileRoute('/test')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-variable-dependency@component---errorComponent---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-variable-dependency@component---errorComponent---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..fe734a45d03
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-variable-dependency@component---errorComponent---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,15 @@
+// Variable references another shared variable
+const baseConfig = {
+  apiUrl: 'http://api.com',
+  timeout: 5000
+};
+const collection = {
+  config: baseConfig,
+  name: 'todos'
+};
+function TestComponent() {
+  return <div>
+      {collection.name} - {baseConfig.apiUrl}
+    </div>;
+}
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-variable-dependency@loader.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-variable-dependency@loader.tsx
new file mode 100644
index 00000000000..742f37595ce
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/shared-variable-dependency@loader.tsx
@@ -0,0 +1,13 @@
+// Variable references another shared variable
+const baseConfig = {
+  apiUrl: 'http://api.com',
+  timeout: 5000
+};
+const collection = {
+  config: baseConfig,
+  name: 'todos'
+};
+const SplitLoader = async () => {
+  return collection.name;
+};
+export { SplitLoader as loader };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/split-only-variable.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/split-only-variable.tsx
new file mode 100644
index 00000000000..f868d5202d2
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/split-only-variable.tsx
@@ -0,0 +1,14 @@
+const $$splitComponentImporter = () => import('split-only-variable.tsx?tsr-split=component---errorComponent---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/solid-router';
+const $$splitLoaderImporter = () => import('split-only-variable.tsx?tsr-split=loader');
+import { lazyFn } from '@tanstack/solid-router';
+import { createFileRoute } from '@tanstack/solid-router';
+
+// Variable used ONLY in component (split part), NOT in loader
+// Should NOT be exported from reference file or imported in split file
+const onlySplit = new Map();
+onlySplit.set('key', 'value');
+export const Route = createFileRoute('/test')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/split-only-variable@component---errorComponent---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/split-only-variable@component---errorComponent---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..761bb11e737
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/split-only-variable@component---errorComponent---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,9 @@
+// Variable used ONLY in component (split part), NOT in loader
+// Should NOT be exported from reference file or imported in split file
+const onlySplit = new Map();
+onlySplit.set('key', 'value');
+function TestComponent() {
+  // Only component uses onlySplit
+  return <div>Size: {onlySplit.size}</div>;
+}
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/split-only-variable@loader.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/split-only-variable@loader.tsx
new file mode 100644
index 00000000000..90e112ef6a2
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/2-components-combined-loader-separate/split-only-variable@loader.tsx
@@ -0,0 +1,11 @@
+// Variable used ONLY in component (split part), NOT in loader
+// Should NOT be exported from reference file or imported in split file
+const onlySplit = new Map();
+onlySplit.set('key', 'value');
+const SplitLoader = async () => {
+  // Loader doesn't use onlySplit at all
+  return {
+    data: 'loaded'
+  };
+};
+export { SplitLoader as loader };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-alias-chain.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-alias-chain.tsx
new file mode 100644
index 00000000000..d1c9f595610
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-alias-chain.tsx
@@ -0,0 +1,12 @@
+const $$splitComponentImporter = () => import('shared-alias-chain.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/solid-router';
+const $$splitLoaderImporter = () => import('shared-alias-chain.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyFn } from '@tanstack/solid-router';
+import { createFileRoute } from '@tanstack/solid-router';
+
+// Alias chain - ensure we track through aliases
+
+export const Route = createFileRoute('/test')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-alias-chain@component---loader---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-alias-chain@component---loader---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..24a3a8ad678
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-alias-chain@component---loader---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,14 @@
+// Alias chain - ensure we track through aliases
+const base = {
+  name: 'collection',
+  items: []
+};
+const alias = base;
+function TestComponent() {
+  return <div>{alias.name}</div>;
+}
+const SplitLoader = async () => {
+  return alias.items;
+};
+export { SplitLoader as loader };
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-alias-chain@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-alias-chain@errorComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-already-exported.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-already-exported.tsx
new file mode 100644
index 00000000000..e4858faea09
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-already-exported.tsx
@@ -0,0 +1,15 @@
+const $$splitComponentImporter = () => import('shared-already-exported.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/solid-router';
+const $$splitLoaderImporter = () => import('shared-already-exported.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyFn } from '@tanstack/solid-router';
+import { createFileRoute } from '@tanstack/solid-router';
+
+// Already exported variable - should not be double-exported
+export const collection = {
+  name: 'todos',
+  preload: async () => {}
+};
+export const Route = createFileRoute('/test')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-already-exported@component---loader---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-already-exported@component---loader---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..cdc0d4c02e0
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-already-exported@component---loader---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,13 @@
+// Already exported variable - should not be double-exported
+import { collection } from "shared-already-exported.tsx";
+function TestComponent() {
+  return <div>{collection.name}</div>;
+}
+const SplitLoader = async () => {
+  await collection.preload();
+  return {
+    data: 'loaded'
+  };
+};
+export { SplitLoader as loader };
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-already-exported@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-already-exported@errorComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-call-expression.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-call-expression.tsx
new file mode 100644
index 00000000000..20c462bfc71
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-call-expression.tsx
@@ -0,0 +1,12 @@
+const $$splitComponentImporter = () => import('shared-call-expression.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/solid-router';
+const $$splitLoaderImporter = () => import('shared-call-expression.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyFn } from '@tanstack/solid-router';
+import { createFileRoute } from '@tanstack/solid-router';
+
+// Call expression initializers - should still work
+
+export const Route = createFileRoute('/test')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-call-expression@component---loader---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-call-expression@component---loader---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..d2ddb0ff86f
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-call-expression@component---loader---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,23 @@
+// Call expression initializers - should still work
+const collection = {
+  create: (name: string) => ({
+    name,
+    items: []
+  })
+}.create('todos');
+const query = {
+  from: (table: string) => ({
+    table,
+    filters: []
+  })
+}.from('users');
+function TestComponent() {
+  return <div>
+      {collection.name} - {query.table}
+    </div>;
+}
+const SplitLoader = async () => {
+  return collection.items;
+};
+export { SplitLoader as loader };
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-call-expression@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-call-expression@errorComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-destructuring.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-destructuring.tsx
new file mode 100644
index 00000000000..6720ba89156
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-destructuring.tsx
@@ -0,0 +1,12 @@
+const $$splitComponentImporter = () => import('shared-destructuring.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/solid-router';
+const $$splitLoaderImporter = () => import('shared-destructuring.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyFn } from '@tanstack/solid-router';
+import { createFileRoute } from '@tanstack/solid-router';
+
+// Destructuring - ensure we promote the right binding
+
+export const Route = createFileRoute('/test')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-destructuring@component---loader---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-destructuring@component---loader---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..03625751b13
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-destructuring@component---loader---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,18 @@
+// Destructuring - ensure we promote the right binding
+const cfg = {
+  apiUrl: 'http://api.com',
+  timeout: 5000
+};
+const {
+  apiUrl
+} = cfg;
+function TestComponent() {
+  // Also uses the destructured binding
+  return <div>API: {apiUrl}</div>;
+}
+const SplitLoader = async () => {
+  // Uses the destructured binding
+  return fetch(apiUrl).then(r => r.json());
+};
+export { SplitLoader as loader };
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-destructuring@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-destructuring@errorComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-let-reassignment.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-let-reassignment.tsx
new file mode 100644
index 00000000000..e9d3ebdfb62
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-let-reassignment.tsx
@@ -0,0 +1,18 @@
+const $$splitComponentImporter = () => import('shared-let-reassignment.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/solid-router';
+const $$splitLoaderImporter = () => import('shared-let-reassignment.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyFn } from '@tanstack/solid-router';
+import { createFileRoute } from '@tanstack/solid-router';
+
+// let with reassignment - tests live binding behavior
+let store = {
+  count: 0
+};
+store = {
+  count: 1,
+  updated: true
+};
+export const Route = createFileRoute('/test')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-let-reassignment@component---loader---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-let-reassignment@component---loader---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..ba7c72d7121
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-let-reassignment@component---loader---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,19 @@
+// let with reassignment - tests live binding behavior
+let store = {
+  count: 0
+};
+store = {
+  count: 1,
+  updated: true
+};
+function TestComponent() {
+  return <div>Count: {store.count}</div>;
+}
+const SplitLoader = async () => {
+  store.count++;
+  return {
+    data: 'loaded'
+  };
+};
+export { SplitLoader as loader };
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-let-reassignment@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-let-reassignment@errorComponent.tsx
new file mode 100644
index 00000000000..f52dfd0d532
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-let-reassignment@errorComponent.tsx
@@ -0,0 +1,8 @@
+// let with reassignment - tests live binding behavior
+let store = {
+  count: 0
+};
+store = {
+  count: 1,
+  updated: true
+};
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-module-variable.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-module-variable.tsx
new file mode 100644
index 00000000000..437c41a3084
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-module-variable.tsx
@@ -0,0 +1,19 @@
+const $$splitComponentImporter = () => import('shared-module-variable.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/solid-router';
+const $$splitLoaderImporter = () => import('shared-module-variable.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyFn } from '@tanstack/solid-router';
+import { createFileRoute } from '@tanstack/solid-router';
+
+// Module-level variable used in both loader and component
+// This simulates a collection/query that should only be initialized once
+const collection = {
+  name: 'todos',
+  preload: async () => {}
+};
+
+// Side effect at module level - should only run once
+console.log('Module initialized:', collection.name);
+export const Route = createFileRoute('/todos')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-module-variable@component---loader---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-module-variable@component---loader---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..4b28c46a7b0
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-module-variable@component---loader---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,22 @@
+// Module-level variable used in both loader and component
+// This simulates a collection/query that should only be initialized once
+const collection = {
+  name: 'todos',
+  preload: async () => {}
+};
+
+// Side effect at module level - should only run once
+console.log('Module initialized:', collection.name);
+function TodosComponent() {
+  // Use collection in component
+  return <div>{collection.name}</div>;
+}
+const SplitLoader = async () => {
+  // Use collection in loader
+  await collection.preload();
+  return {
+    data: 'loaded'
+  };
+};
+export { SplitLoader as loader };
+export { TodosComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-module-variable@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-module-variable@errorComponent.tsx
new file mode 100644
index 00000000000..caf87ba5c8d
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-module-variable@errorComponent.tsx
@@ -0,0 +1,9 @@
+// Module-level variable used in both loader and component
+// This simulates a collection/query that should only be initialized once
+const collection = {
+  name: 'todos',
+  preload: async () => {}
+};
+
+// Side effect at module level - should only run once
+console.log('Module initialized:', collection.name);
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-multiple-declarations.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-multiple-declarations.tsx
new file mode 100644
index 00000000000..278c8e95812
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-multiple-declarations.tsx
@@ -0,0 +1,13 @@
+const $$splitComponentImporter = () => import('shared-multiple-declarations.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/solid-router';
+const $$splitLoaderImporter = () => import('shared-multiple-declarations.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyFn } from '@tanstack/solid-router';
+import { createFileRoute } from '@tanstack/solid-router';
+
+// Multiple declarations in same const statement
+// Only collection1 is shared, but both are in same declaration
+
+export const Route = createFileRoute('/test')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-multiple-declarations@component---loader---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-multiple-declarations@component---loader---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..dbc75a6caf9
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-multiple-declarations@component---loader---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,18 @@
+// Multiple declarations in same const statement
+// Only collection1 is shared, but both are in same declaration
+const collection1 = {
+    name: 'todos'
+  },
+  collection2 = {
+    name: 'users'
+  };
+function TestComponent() {
+  return <div>
+      {collection1.name} {collection2.name}
+    </div>;
+}
+const SplitLoader = async () => {
+  return collection1.name;
+};
+export { SplitLoader as loader };
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-multiple-declarations@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-multiple-declarations@errorComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-multiple-variables.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-multiple-variables.tsx
new file mode 100644
index 00000000000..d71a7a0169d
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-multiple-variables.tsx
@@ -0,0 +1,12 @@
+const $$splitComponentImporter = () => import('shared-multiple-variables.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/solid-router';
+const $$splitLoaderImporter = () => import('shared-multiple-variables.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyFn } from '@tanstack/solid-router';
+import { createFileRoute } from '@tanstack/solid-router';
+
+// Multiple shared variables used by both loader and component
+
+export const Route = createFileRoute('/test')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-multiple-variables@component---loader---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-multiple-variables@component---loader---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..9c780d4347d
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-multiple-variables@component---loader---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,26 @@
+// Multiple shared variables used by both loader and component
+const collection1 = {
+  name: 'todos',
+  preload: async () => {}
+};
+const collection2 = {
+  name: 'users',
+  preload: async () => {}
+};
+const config = {
+  apiUrl: 'http://api.com'
+};
+function TestComponent() {
+  return <div>
+      {collection1.name} {collection2.name} {config.apiUrl}
+    </div>;
+}
+const SplitLoader = async () => {
+  await collection1.preload();
+  await collection2.preload();
+  return {
+    data: 'loaded'
+  };
+};
+export { SplitLoader as loader };
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-multiple-variables@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-multiple-variables@errorComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-nested-closure.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-nested-closure.tsx
new file mode 100644
index 00000000000..c29dc853fdf
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-nested-closure.tsx
@@ -0,0 +1,12 @@
+const $$splitComponentImporter = () => import('shared-nested-closure.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/solid-router';
+const $$splitLoaderImporter = () => import('shared-nested-closure.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyFn } from '@tanstack/solid-router';
+import { createFileRoute } from '@tanstack/solid-router';
+
+// Nested closure - ensure we track through closures
+
+export const Route = createFileRoute('/test')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-nested-closure@component---loader---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-nested-closure@component---loader---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..dc28c14a14a
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-nested-closure@component---loader---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,9 @@
+// Nested closure - ensure we track through closures
+const cfg = {
+  api: 'http://api.com'
+};
+const makeLoader = () => () => cfg.api;
+const Component = () => <div>{cfg.api}</div>;
+const SplitLoader = makeLoader();
+export { SplitLoader as loader };
+export { Component as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-nested-closure@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-nested-closure@errorComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-nested-function-usage.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-nested-function-usage.tsx
new file mode 100644
index 00000000000..13b175e04ec
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-nested-function-usage.tsx
@@ -0,0 +1,12 @@
+const $$splitComponentImporter = () => import('shared-nested-function-usage.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/solid-router';
+const $$splitLoaderImporter = () => import('shared-nested-function-usage.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyFn } from '@tanstack/solid-router';
+import { createFileRoute } from '@tanstack/solid-router';
+
+// Variable used inside nested function
+
+export const Route = createFileRoute('/test')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-nested-function-usage@component---loader---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-nested-function-usage@component---loader---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..720598b13bd
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-nested-function-usage@component---loader---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,13 @@
+// Variable used inside nested function
+const collection = {
+  name: 'todos',
+  items: []
+};
+function loadData() {
+  return collection.items;
+}
+function TestComponent() {
+  return <div>{collection.name}</div>;
+}
+export { loadData as loader };
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-nested-function-usage@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-nested-function-usage@errorComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-object-with-methods.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-object-with-methods.tsx
new file mode 100644
index 00000000000..3892ef14436
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-object-with-methods.tsx
@@ -0,0 +1,12 @@
+const $$splitComponentImporter = () => import('shared-object-with-methods.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/solid-router';
+const $$splitLoaderImporter = () => import('shared-object-with-methods.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyFn } from '@tanstack/solid-router';
+import { createFileRoute } from '@tanstack/solid-router';
+
+// Object contains methods (functions) - should still be shared as whole object
+
+export const Route = createFileRoute('/test')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-object-with-methods@component---loader---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-object-with-methods@component---loader---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..7ee457ba36d
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-object-with-methods@component---loader---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,18 @@
+// Object contains methods (functions) - should still be shared as whole object
+const api = {
+  endpoint: 'http://api.com',
+  fetch: async () => ({
+    data: 'loaded'
+  }),
+  cache: new Map()
+};
+function TestComponent() {
+  return <div>
+      {api.endpoint} - Cache size: {api.cache.size}
+    </div>;
+}
+const SplitLoader = async () => {
+  return api.fetch();
+};
+export { SplitLoader as loader };
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-object-with-methods@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-object-with-methods@errorComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-partial-declarators.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-partial-declarators.tsx
new file mode 100644
index 00000000000..0d68de7cb30
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-partial-declarators.tsx
@@ -0,0 +1,14 @@
+const $$splitComponentImporter = () => import('shared-partial-declarators.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/solid-router';
+const $$splitLoaderImporter = () => import('shared-partial-declarators.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyFn } from '@tanstack/solid-router';
+import { createFileRoute } from '@tanstack/solid-router';
+
+// Multiple declarators in same statement
+// Only 'shared' is used by both loader and component
+// 'a' is only used in component, should NOT be exported
+
+export const Route = createFileRoute('/test')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-partial-declarators@component---loader---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-partial-declarators@component---loader---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..2fe8995815d
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-partial-declarators@component---loader---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,18 @@
+// Multiple declarators in same statement
+// Only 'shared' is used by both loader and component
+// 'a' is only used in component, should NOT be exported
+const a = 1,
+  shared = new Map();
+function TestComponent() {
+  // Uses both shared and a
+  return <div>Count: {shared.size + a}</div>;
+}
+const SplitLoader = async () => {
+  // Only uses shared, not a
+  shared.set('loaded', true);
+  return {
+    data: 'loaded'
+  };
+};
+export { SplitLoader as loader };
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-partial-declarators@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-partial-declarators@errorComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-variable-dependency.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-variable-dependency.tsx
new file mode 100644
index 00000000000..fe9f631e2fc
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-variable-dependency.tsx
@@ -0,0 +1,12 @@
+const $$splitComponentImporter = () => import('shared-variable-dependency.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/solid-router';
+const $$splitLoaderImporter = () => import('shared-variable-dependency.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyFn } from '@tanstack/solid-router';
+import { createFileRoute } from '@tanstack/solid-router';
+
+// Variable references another shared variable
+
+export const Route = createFileRoute('/test')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-variable-dependency@component---loader---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-variable-dependency@component---loader---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..eec1a99efa2
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-variable-dependency@component---loader---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,19 @@
+// Variable references another shared variable
+const baseConfig = {
+  apiUrl: 'http://api.com',
+  timeout: 5000
+};
+const collection = {
+  config: baseConfig,
+  name: 'todos'
+};
+function TestComponent() {
+  return <div>
+      {collection.name} - {baseConfig.apiUrl}
+    </div>;
+}
+const SplitLoader = async () => {
+  return collection.name;
+};
+export { SplitLoader as loader };
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-variable-dependency@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/shared-variable-dependency@errorComponent.tsx
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/split-only-variable.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/split-only-variable.tsx
new file mode 100644
index 00000000000..56d47b70fd2
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/split-only-variable.tsx
@@ -0,0 +1,14 @@
+const $$splitComponentImporter = () => import('split-only-variable.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyRouteComponent } from '@tanstack/solid-router';
+const $$splitLoaderImporter = () => import('split-only-variable.tsx?tsr-split=component---loader---notFoundComponent---pendingComponent');
+import { lazyFn } from '@tanstack/solid-router';
+import { createFileRoute } from '@tanstack/solid-router';
+
+// Variable used ONLY in component (split part), NOT in loader
+// Should NOT be exported from reference file or imported in split file
+const onlySplit = new Map();
+onlySplit.set('key', 'value');
+export const Route = createFileRoute('/test')({
+  loader: lazyFn($$splitLoaderImporter, 'loader'),
+  component: lazyRouteComponent($$splitComponentImporter, 'component')
+});
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/split-only-variable@component---loader---notFoundComponent---pendingComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/split-only-variable@component---loader---notFoundComponent---pendingComponent.tsx
new file mode 100644
index 00000000000..65dfd7c5ca0
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/split-only-variable@component---loader---notFoundComponent---pendingComponent.tsx
@@ -0,0 +1,16 @@
+// Variable used ONLY in component (split part), NOT in loader
+// Should NOT be exported from reference file or imported in split file
+const onlySplit = new Map();
+onlySplit.set('key', 'value');
+function TestComponent() {
+  // Only component uses onlySplit
+  return <div>Size: {onlySplit.size}</div>;
+}
+const SplitLoader = async () => {
+  // Loader doesn't use onlySplit at all
+  return {
+    data: 'loaded'
+  };
+};
+export { SplitLoader as loader };
+export { TestComponent as component };
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/split-only-variable@errorComponent.tsx b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/split-only-variable@errorComponent.tsx
new file mode 100644
index 00000000000..90e58d835af
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/snapshots/solid/3-all-combined-errorComponent-separate/split-only-variable@errorComponent.tsx
@@ -0,0 +1,4 @@
+// Variable used ONLY in component (split part), NOT in loader
+// Should NOT be exported from reference file or imported in split file
+const onlySplit = new Map();
+onlySplit.set('key', 'value');
\ No newline at end of file
diff --git a/packages/router-plugin/tests/code-splitter/test-files/react/shared-alias-chain.tsx b/packages/router-plugin/tests/code-splitter/test-files/react/shared-alias-chain.tsx
new file mode 100644
index 00000000000..bb80c4c956a
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/test-files/react/shared-alias-chain.tsx
@@ -0,0 +1,16 @@
+import { createFileRoute } from '@tanstack/react-router'
+
+// Alias chain - ensure we track through aliases
+const base = { name: 'collection', items: [] }
+const alias = base
+
+export const Route = createFileRoute('/test')({
+  loader: async () => {
+    return alias.items
+  },
+  component: TestComponent,
+})
+
+function TestComponent() {
+  return <div>{alias.name}</div>
+}
diff --git a/packages/router-plugin/tests/code-splitter/test-files/react/shared-already-exported.tsx b/packages/router-plugin/tests/code-splitter/test-files/react/shared-already-exported.tsx
new file mode 100644
index 00000000000..419e56fa15f
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/test-files/react/shared-already-exported.tsx
@@ -0,0 +1,16 @@
+import { createFileRoute } from '@tanstack/react-router'
+
+// Already exported variable - should not be double-exported
+export const collection = { name: 'todos', preload: async () => {} }
+
+export const Route = createFileRoute('/test')({
+  loader: async () => {
+    await collection.preload()
+    return { data: 'loaded' }
+  },
+  component: TestComponent,
+})
+
+function TestComponent() {
+  return <div>{collection.name}</div>
+}
diff --git a/packages/router-plugin/tests/code-splitter/test-files/react/shared-call-expression.tsx b/packages/router-plugin/tests/code-splitter/test-files/react/shared-call-expression.tsx
new file mode 100644
index 00000000000..50df00bd8a1
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/test-files/react/shared-call-expression.tsx
@@ -0,0 +1,24 @@
+import { createFileRoute } from '@tanstack/react-router'
+
+// Call expression initializers - should still work
+const collection = { create: (name: string) => ({ name, items: [] }) }.create(
+  'todos',
+)
+const query = { from: (table: string) => ({ table, filters: [] }) }.from(
+  'users',
+)
+
+export const Route = createFileRoute('/test')({
+  loader: async () => {
+    return collection.items
+  },
+  component: TestComponent,
+})
+
+function TestComponent() {
+  return (
+    <div>
+      {collection.name} - {query.table}
+    </div>
+  )
+}
diff --git a/packages/router-plugin/tests/code-splitter/test-files/react/shared-destructuring.tsx b/packages/router-plugin/tests/code-splitter/test-files/react/shared-destructuring.tsx
new file mode 100644
index 00000000000..c702e852386
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/test-files/react/shared-destructuring.tsx
@@ -0,0 +1,18 @@
+import { createFileRoute } from '@tanstack/react-router'
+
+// Destructuring - ensure we promote the right binding
+const cfg = { apiUrl: 'http://api.com', timeout: 5000 }
+const { apiUrl } = cfg
+
+export const Route = createFileRoute('/test')({
+  loader: async () => {
+    // Uses the destructured binding
+    return fetch(apiUrl).then((r) => r.json())
+  },
+  component: TestComponent,
+})
+
+function TestComponent() {
+  // Also uses the destructured binding
+  return <div>API: {apiUrl}</div>
+}
diff --git a/packages/router-plugin/tests/code-splitter/test-files/react/shared-let-reassignment.tsx b/packages/router-plugin/tests/code-splitter/test-files/react/shared-let-reassignment.tsx
new file mode 100644
index 00000000000..30e6b3947f2
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/test-files/react/shared-let-reassignment.tsx
@@ -0,0 +1,17 @@
+import { createFileRoute } from '@tanstack/react-router'
+
+// let with reassignment - tests live binding behavior
+let store = { count: 0 }
+store = { count: 1, updated: true }
+
+export const Route = createFileRoute('/test')({
+  loader: async () => {
+    store.count++
+    return { data: 'loaded' }
+  },
+  component: TestComponent,
+})
+
+function TestComponent() {
+  return <div>Count: {store.count}</div>
+}
diff --git a/packages/router-plugin/tests/code-splitter/test-files/react/shared-module-variable.tsx b/packages/router-plugin/tests/code-splitter/test-files/react/shared-module-variable.tsx
new file mode 100644
index 00000000000..64ce29cd56f
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/test-files/react/shared-module-variable.tsx
@@ -0,0 +1,22 @@
+import { createFileRoute } from '@tanstack/react-router'
+
+// Module-level variable used in both loader and component
+// This simulates a collection/query that should only be initialized once
+const collection = { name: 'todos', preload: async () => {} }
+
+// Side effect at module level - should only run once
+console.log('Module initialized:', collection.name)
+
+export const Route = createFileRoute('/todos')({
+  loader: async () => {
+    // Use collection in loader
+    await collection.preload()
+    return { data: 'loaded' }
+  },
+  component: TodosComponent,
+})
+
+function TodosComponent() {
+  // Use collection in component
+  return <div>{collection.name}</div>
+}
diff --git a/packages/router-plugin/tests/code-splitter/test-files/react/shared-multiple-declarations.tsx b/packages/router-plugin/tests/code-splitter/test-files/react/shared-multiple-declarations.tsx
new file mode 100644
index 00000000000..bffe8459c4f
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/test-files/react/shared-multiple-declarations.tsx
@@ -0,0 +1,21 @@
+import { createFileRoute } from '@tanstack/react-router'
+
+// Multiple declarations in same const statement
+// Only collection1 is shared, but both are in same declaration
+const collection1 = { name: 'todos' },
+  collection2 = { name: 'users' }
+
+export const Route = createFileRoute('/test')({
+  loader: async () => {
+    return collection1.name
+  },
+  component: TestComponent,
+})
+
+function TestComponent() {
+  return (
+    <div>
+      {collection1.name} {collection2.name}
+    </div>
+  )
+}
diff --git a/packages/router-plugin/tests/code-splitter/test-files/react/shared-multiple-variables.tsx b/packages/router-plugin/tests/code-splitter/test-files/react/shared-multiple-variables.tsx
new file mode 100644
index 00000000000..0abae8e5dde
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/test-files/react/shared-multiple-variables.tsx
@@ -0,0 +1,23 @@
+import { createFileRoute } from '@tanstack/react-router'
+
+// Multiple shared variables used by both loader and component
+const collection1 = { name: 'todos', preload: async () => {} }
+const collection2 = { name: 'users', preload: async () => {} }
+const config = { apiUrl: 'http://api.com' }
+
+export const Route = createFileRoute('/test')({
+  loader: async () => {
+    await collection1.preload()
+    await collection2.preload()
+    return { data: 'loaded' }
+  },
+  component: TestComponent,
+})
+
+function TestComponent() {
+  return (
+    <div>
+      {collection1.name} {collection2.name} {config.apiUrl}
+    </div>
+  )
+}
diff --git a/packages/router-plugin/tests/code-splitter/test-files/react/shared-nested-closure.tsx b/packages/router-plugin/tests/code-splitter/test-files/react/shared-nested-closure.tsx
new file mode 100644
index 00000000000..49006293230
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/test-files/react/shared-nested-closure.tsx
@@ -0,0 +1,11 @@
+import { createFileRoute } from '@tanstack/react-router'
+
+// Nested closure - ensure we track through closures
+const cfg = { api: 'http://api.com' }
+const makeLoader = () => () => cfg.api
+const Component = () => <div>{cfg.api}</div>
+
+export const Route = createFileRoute('/test')({
+  loader: makeLoader(),
+  component: Component,
+})
diff --git a/packages/router-plugin/tests/code-splitter/test-files/react/shared-nested-function-usage.tsx b/packages/router-plugin/tests/code-splitter/test-files/react/shared-nested-function-usage.tsx
new file mode 100644
index 00000000000..bff2daa131c
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/test-files/react/shared-nested-function-usage.tsx
@@ -0,0 +1,17 @@
+import { createFileRoute } from '@tanstack/react-router'
+
+// Variable used inside nested function
+const collection = { name: 'todos', items: [] }
+
+function loadData() {
+  return collection.items
+}
+
+export const Route = createFileRoute('/test')({
+  loader: loadData,
+  component: TestComponent,
+})
+
+function TestComponent() {
+  return <div>{collection.name}</div>
+}
diff --git a/packages/router-plugin/tests/code-splitter/test-files/react/shared-object-with-methods.tsx b/packages/router-plugin/tests/code-splitter/test-files/react/shared-object-with-methods.tsx
new file mode 100644
index 00000000000..72cf0ee2c68
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/test-files/react/shared-object-with-methods.tsx
@@ -0,0 +1,23 @@
+import { createFileRoute } from '@tanstack/react-router'
+
+// Object contains methods (functions) - should still be shared as whole object
+const api = {
+  endpoint: 'http://api.com',
+  fetch: async () => ({ data: 'loaded' }),
+  cache: new Map(),
+}
+
+export const Route = createFileRoute('/test')({
+  loader: async () => {
+    return api.fetch()
+  },
+  component: TestComponent,
+})
+
+function TestComponent() {
+  return (
+    <div>
+      {api.endpoint} - Cache size: {api.cache.size}
+    </div>
+  )
+}
diff --git a/packages/router-plugin/tests/code-splitter/test-files/react/shared-partial-declarators.tsx b/packages/router-plugin/tests/code-splitter/test-files/react/shared-partial-declarators.tsx
new file mode 100644
index 00000000000..4097c74cf03
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/test-files/react/shared-partial-declarators.tsx
@@ -0,0 +1,21 @@
+import { createFileRoute } from '@tanstack/react-router'
+
+// Multiple declarators in same statement
+// Only 'shared' is used by both loader and component
+// 'a' is only used in component, should NOT be exported
+const a = 1,
+  shared = new Map()
+
+export const Route = createFileRoute('/test')({
+  loader: async () => {
+    // Only uses shared, not a
+    shared.set('loaded', true)
+    return { data: 'loaded' }
+  },
+  component: TestComponent,
+})
+
+function TestComponent() {
+  // Uses both shared and a
+  return <div>Count: {shared.size + a}</div>
+}
diff --git a/packages/router-plugin/tests/code-splitter/test-files/react/shared-variable-dependency.tsx b/packages/router-plugin/tests/code-splitter/test-files/react/shared-variable-dependency.tsx
new file mode 100644
index 00000000000..45f814772ca
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/test-files/react/shared-variable-dependency.tsx
@@ -0,0 +1,20 @@
+import { createFileRoute } from '@tanstack/react-router'
+
+// Variable references another shared variable
+const baseConfig = { apiUrl: 'http://api.com', timeout: 5000 }
+const collection = { config: baseConfig, name: 'todos' }
+
+export const Route = createFileRoute('/test')({
+  loader: async () => {
+    return collection.name
+  },
+  component: TestComponent,
+})
+
+function TestComponent() {
+  return (
+    <div>
+      {collection.name} - {baseConfig.apiUrl}
+    </div>
+  )
+}
diff --git a/packages/router-plugin/tests/code-splitter/test-files/react/split-only-variable.tsx b/packages/router-plugin/tests/code-splitter/test-files/react/split-only-variable.tsx
new file mode 100644
index 00000000000..6cd1474c136
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/test-files/react/split-only-variable.tsx
@@ -0,0 +1,19 @@
+import { createFileRoute } from '@tanstack/react-router'
+
+// Variable used ONLY in component (split part), NOT in loader
+// Should NOT be exported from reference file or imported in split file
+const onlySplit = new Map()
+onlySplit.set('key', 'value')
+
+export const Route = createFileRoute('/test')({
+  loader: async () => {
+    // Loader doesn't use onlySplit at all
+    return { data: 'loaded' }
+  },
+  component: TestComponent,
+})
+
+function TestComponent() {
+  // Only component uses onlySplit
+  return <div>Size: {onlySplit.size}</div>
+}
diff --git a/packages/router-plugin/tests/code-splitter/test-files/solid/shared-alias-chain.tsx b/packages/router-plugin/tests/code-splitter/test-files/solid/shared-alias-chain.tsx
new file mode 100644
index 00000000000..08aa78def0e
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/test-files/solid/shared-alias-chain.tsx
@@ -0,0 +1,16 @@
+import { createFileRoute } from '@tanstack/solid-router'
+
+// Alias chain - ensure we track through aliases
+const base = { name: 'collection', items: [] }
+const alias = base
+
+export const Route = createFileRoute('/test')({
+  loader: async () => {
+    return alias.items
+  },
+  component: TestComponent,
+})
+
+function TestComponent() {
+  return <div>{alias.name}</div>
+}
diff --git a/packages/router-plugin/tests/code-splitter/test-files/solid/shared-already-exported.tsx b/packages/router-plugin/tests/code-splitter/test-files/solid/shared-already-exported.tsx
new file mode 100644
index 00000000000..7ce92d13854
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/test-files/solid/shared-already-exported.tsx
@@ -0,0 +1,16 @@
+import { createFileRoute } from '@tanstack/solid-router'
+
+// Already exported variable - should not be double-exported
+export const collection = { name: 'todos', preload: async () => {} }
+
+export const Route = createFileRoute('/test')({
+  loader: async () => {
+    await collection.preload()
+    return { data: 'loaded' }
+  },
+  component: TestComponent,
+})
+
+function TestComponent() {
+  return <div>{collection.name}</div>
+}
diff --git a/packages/router-plugin/tests/code-splitter/test-files/solid/shared-call-expression.tsx b/packages/router-plugin/tests/code-splitter/test-files/solid/shared-call-expression.tsx
new file mode 100644
index 00000000000..3f25b585e35
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/test-files/solid/shared-call-expression.tsx
@@ -0,0 +1,24 @@
+import { createFileRoute } from '@tanstack/solid-router'
+
+// Call expression initializers - should still work
+const collection = { create: (name: string) => ({ name, items: [] }) }.create(
+  'todos',
+)
+const query = { from: (table: string) => ({ table, filters: [] }) }.from(
+  'users',
+)
+
+export const Route = createFileRoute('/test')({
+  loader: async () => {
+    return collection.items
+  },
+  component: TestComponent,
+})
+
+function TestComponent() {
+  return (
+    <div>
+      {collection.name} - {query.table}
+    </div>
+  )
+}
diff --git a/packages/router-plugin/tests/code-splitter/test-files/solid/shared-destructuring.tsx b/packages/router-plugin/tests/code-splitter/test-files/solid/shared-destructuring.tsx
new file mode 100644
index 00000000000..6132b7d0a91
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/test-files/solid/shared-destructuring.tsx
@@ -0,0 +1,18 @@
+import { createFileRoute } from '@tanstack/solid-router'
+
+// Destructuring - ensure we promote the right binding
+const cfg = { apiUrl: 'http://api.com', timeout: 5000 }
+const { apiUrl } = cfg
+
+export const Route = createFileRoute('/test')({
+  loader: async () => {
+    // Uses the destructured binding
+    return fetch(apiUrl).then((r) => r.json())
+  },
+  component: TestComponent,
+})
+
+function TestComponent() {
+  // Also uses the destructured binding
+  return <div>API: {apiUrl}</div>
+}
diff --git a/packages/router-plugin/tests/code-splitter/test-files/solid/shared-let-reassignment.tsx b/packages/router-plugin/tests/code-splitter/test-files/solid/shared-let-reassignment.tsx
new file mode 100644
index 00000000000..9503124dbff
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/test-files/solid/shared-let-reassignment.tsx
@@ -0,0 +1,17 @@
+import { createFileRoute } from '@tanstack/solid-router'
+
+// let with reassignment - tests live binding behavior
+let store = { count: 0 }
+store = { count: 1, updated: true }
+
+export const Route = createFileRoute('/test')({
+  loader: async () => {
+    store.count++
+    return { data: 'loaded' }
+  },
+  component: TestComponent,
+})
+
+function TestComponent() {
+  return <div>Count: {store.count}</div>
+}
diff --git a/packages/router-plugin/tests/code-splitter/test-files/solid/shared-module-variable.tsx b/packages/router-plugin/tests/code-splitter/test-files/solid/shared-module-variable.tsx
new file mode 100644
index 00000000000..f5b26348221
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/test-files/solid/shared-module-variable.tsx
@@ -0,0 +1,22 @@
+import { createFileRoute } from '@tanstack/solid-router'
+
+// Module-level variable used in both loader and component
+// This simulates a collection/query that should only be initialized once
+const collection = { name: 'todos', preload: async () => {} }
+
+// Side effect at module level - should only run once
+console.log('Module initialized:', collection.name)
+
+export const Route = createFileRoute('/todos')({
+  loader: async () => {
+    // Use collection in loader
+    await collection.preload()
+    return { data: 'loaded' }
+  },
+  component: TodosComponent,
+})
+
+function TodosComponent() {
+  // Use collection in component
+  return <div>{collection.name}</div>
+}
diff --git a/packages/router-plugin/tests/code-splitter/test-files/solid/shared-multiple-declarations.tsx b/packages/router-plugin/tests/code-splitter/test-files/solid/shared-multiple-declarations.tsx
new file mode 100644
index 00000000000..3dda89d04f8
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/test-files/solid/shared-multiple-declarations.tsx
@@ -0,0 +1,21 @@
+import { createFileRoute } from '@tanstack/solid-router'
+
+// Multiple declarations in same const statement
+// Only collection1 is shared, but both are in same declaration
+const collection1 = { name: 'todos' },
+  collection2 = { name: 'users' }
+
+export const Route = createFileRoute('/test')({
+  loader: async () => {
+    return collection1.name
+  },
+  component: TestComponent,
+})
+
+function TestComponent() {
+  return (
+    <div>
+      {collection1.name} {collection2.name}
+    </div>
+  )
+}
diff --git a/packages/router-plugin/tests/code-splitter/test-files/solid/shared-multiple-variables.tsx b/packages/router-plugin/tests/code-splitter/test-files/solid/shared-multiple-variables.tsx
new file mode 100644
index 00000000000..bb6fe1bc707
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/test-files/solid/shared-multiple-variables.tsx
@@ -0,0 +1,23 @@
+import { createFileRoute } from '@tanstack/solid-router'
+
+// Multiple shared variables used by both loader and component
+const collection1 = { name: 'todos', preload: async () => {} }
+const collection2 = { name: 'users', preload: async () => {} }
+const config = { apiUrl: 'http://api.com' }
+
+export const Route = createFileRoute('/test')({
+  loader: async () => {
+    await collection1.preload()
+    await collection2.preload()
+    return { data: 'loaded' }
+  },
+  component: TestComponent,
+})
+
+function TestComponent() {
+  return (
+    <div>
+      {collection1.name} {collection2.name} {config.apiUrl}
+    </div>
+  )
+}
diff --git a/packages/router-plugin/tests/code-splitter/test-files/solid/shared-nested-closure.tsx b/packages/router-plugin/tests/code-splitter/test-files/solid/shared-nested-closure.tsx
new file mode 100644
index 00000000000..c2163f15311
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/test-files/solid/shared-nested-closure.tsx
@@ -0,0 +1,11 @@
+import { createFileRoute } from '@tanstack/solid-router'
+
+// Nested closure - ensure we track through closures
+const cfg = { api: 'http://api.com' }
+const makeLoader = () => () => cfg.api
+const Component = () => <div>{cfg.api}</div>
+
+export const Route = createFileRoute('/test')({
+  loader: makeLoader(),
+  component: Component,
+})
diff --git a/packages/router-plugin/tests/code-splitter/test-files/solid/shared-nested-function-usage.tsx b/packages/router-plugin/tests/code-splitter/test-files/solid/shared-nested-function-usage.tsx
new file mode 100644
index 00000000000..b35d6d89265
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/test-files/solid/shared-nested-function-usage.tsx
@@ -0,0 +1,17 @@
+import { createFileRoute } from '@tanstack/solid-router'
+
+// Variable used inside nested function
+const collection = { name: 'todos', items: [] }
+
+function loadData() {
+  return collection.items
+}
+
+export const Route = createFileRoute('/test')({
+  loader: loadData,
+  component: TestComponent,
+})
+
+function TestComponent() {
+  return <div>{collection.name}</div>
+}
diff --git a/packages/router-plugin/tests/code-splitter/test-files/solid/shared-object-with-methods.tsx b/packages/router-plugin/tests/code-splitter/test-files/solid/shared-object-with-methods.tsx
new file mode 100644
index 00000000000..4ff7442ba42
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/test-files/solid/shared-object-with-methods.tsx
@@ -0,0 +1,23 @@
+import { createFileRoute } from '@tanstack/solid-router'
+
+// Object contains methods (functions) - should still be shared as whole object
+const api = {
+  endpoint: 'http://api.com',
+  fetch: async () => ({ data: 'loaded' }),
+  cache: new Map(),
+}
+
+export const Route = createFileRoute('/test')({
+  loader: async () => {
+    return api.fetch()
+  },
+  component: TestComponent,
+})
+
+function TestComponent() {
+  return (
+    <div>
+      {api.endpoint} - Cache size: {api.cache.size}
+    </div>
+  )
+}
diff --git a/packages/router-plugin/tests/code-splitter/test-files/solid/shared-partial-declarators.tsx b/packages/router-plugin/tests/code-splitter/test-files/solid/shared-partial-declarators.tsx
new file mode 100644
index 00000000000..5cea23681f2
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/test-files/solid/shared-partial-declarators.tsx
@@ -0,0 +1,21 @@
+import { createFileRoute } from '@tanstack/solid-router'
+
+// Multiple declarators in same statement
+// Only 'shared' is used by both loader and component
+// 'a' is only used in component, should NOT be exported
+const a = 1,
+  shared = new Map()
+
+export const Route = createFileRoute('/test')({
+  loader: async () => {
+    // Only uses shared, not a
+    shared.set('loaded', true)
+    return { data: 'loaded' }
+  },
+  component: TestComponent,
+})
+
+function TestComponent() {
+  // Uses both shared and a
+  return <div>Count: {shared.size + a}</div>
+}
diff --git a/packages/router-plugin/tests/code-splitter/test-files/solid/shared-variable-dependency.tsx b/packages/router-plugin/tests/code-splitter/test-files/solid/shared-variable-dependency.tsx
new file mode 100644
index 00000000000..d825c081ffa
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/test-files/solid/shared-variable-dependency.tsx
@@ -0,0 +1,20 @@
+import { createFileRoute } from '@tanstack/solid-router'
+
+// Variable references another shared variable
+const baseConfig = { apiUrl: 'http://api.com', timeout: 5000 }
+const collection = { config: baseConfig, name: 'todos' }
+
+export const Route = createFileRoute('/test')({
+  loader: async () => {
+    return collection.name
+  },
+  component: TestComponent,
+})
+
+function TestComponent() {
+  return (
+    <div>
+      {collection.name} - {baseConfig.apiUrl}
+    </div>
+  )
+}
diff --git a/packages/router-plugin/tests/code-splitter/test-files/solid/split-only-variable.tsx b/packages/router-plugin/tests/code-splitter/test-files/solid/split-only-variable.tsx
new file mode 100644
index 00000000000..f98daf9f5c4
--- /dev/null
+++ b/packages/router-plugin/tests/code-splitter/test-files/solid/split-only-variable.tsx
@@ -0,0 +1,19 @@
+import { createFileRoute } from '@tanstack/solid-router'
+
+// Variable used ONLY in component (split part), NOT in loader
+// Should NOT be exported from reference file or imported in split file
+const onlySplit = new Map()
+onlySplit.set('key', 'value')
+
+export const Route = createFileRoute('/test')({
+  loader: async () => {
+    // Loader doesn't use onlySplit at all
+    return { data: 'loaded' }
+  },
+  component: TestComponent,
+})
+
+function TestComponent() {
+  // Only component uses onlySplit
+  return <div>Size: {onlySplit.size}</div>
+}