ci(size): resolve fixtures via esbuild aliases, not root workspace deps

Adding solid-js/@solidjs/* as root devDeps re-keyed pnpm's peer graph
(vitest and vite-plugin-solid instances gained new peer contexts),
relocating the benchmark harness's physical dependencies — which CodSpeed
reports as instruction-count regressions despite zero code changes.
Aliases in .size-limit.js point bare specifiers at the built browser-prod
artifacts instead; the lockfile now only adds size-limit's own isolated
tree. Same measured numbers on every scenario.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Author: ryansolid

.size-limit.js

@@ -0,0 +1,47 @@
+// Import-cost scenarios for #2883. Bare specifiers resolve via esbuild
+// aliases to the built browser-prod artifacts rather than root workspace
+// devDeps: adding solid-js/@solidjs/* to the root package.json re-keys
+// pnpm's peer graph (vitest/vite-plugin-solid instances), which relocates
+// the benchmark harness and shows up as phantom CodSpeed regressions.
+const alias = {
+  "solid-js": "./packages/solid/dist/solid.js",
+  "@solidjs/web": "./packages/solid-web/dist/web.js",
+  "@solidjs/signals": "./packages/solid-signals/dist/prod/index.js"
+};
+const modifyEsbuildConfig = config => ({ ...config, alias });
+
+module.exports = [
+  {
+    name: "signals: core floor (createSignal/Memo/Effect/Root/flush)",
+    path: "packages/solid-signals/dist/prod/index.js",
+    import: "{ createSignal, createMemo, createEffect, createRoot, flush }",
+    limit: "7.1 KB",
+    modifyEsbuildConfig
+  },
+  {
+    name: "signals: + createStore",
+    path: "packages/solid-signals/dist/prod/index.js",
+    import: "{ createSignal, createMemo, createEffect, createRoot, flush, createStore }",
+    limit: "11.6 KB",
+    modifyEsbuildConfig
+  },
+  {
+    name: "signals: + isPending/latest",
+    path: "packages/solid-signals/dist/prod/index.js",
+    import: "{ createSignal, createMemo, createEffect, createRoot, flush, isPending, latest }",
+    limit: "8.75 KB",
+    modifyEsbuildConfig
+  },
+  {
+    name: "app: render + one signal (the simple-app floor)",
+    path: "size-fixtures/minimal-app.js",
+    limit: "10 KB",
+    modifyEsbuildConfig
+  },
+  {
+    name: "app: CSR with Show/For/Loading/Errored/lazy",
+    path: "size-fixtures/csr-app.js",
+    limit: "12 KB",
+    modifyEsbuildConfig
+  }
+];

.size-limit.json

@@ -40,8 +40,6 @@
     "@rollup/plugin-node-resolve": "^15.0.1",
     "@rollup/plugin-replace": "^5.0.2",
     "@size-limit/preset-small-lib": "^12.1.0",
-    "@solidjs/signals": "workspace:*",
-    "@solidjs/web": "workspace:*",
     "@types/node": "^25.0.8",
     "@vitest/coverage-v8": "^4.1.6",
     "babel-plugin-transform-rename-import": "^2.3.0",
@@ -59,7 +57,6 @@
     "seroval": "~1.5.4",
     "simple-git-hooks": "^2.8.1",
     "size-limit": "^12.1.0",
-    "solid-js": "workspace:*",
     "symlink-dir": "^5.0.1",
     "tsconfig-replace-paths": "^0.0.11",
     "turbo": "^2.0.0",