diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 9c676ec17..1079f8eac 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -13,6 +13,24 @@ jobs:
     steps:
       - name: Check out code
         uses: actions/checkout@v5
+      - name: Detect changed files
+        uses: dorny/paths-filter@v3
+        id: filter
+        with:
+          list-files: shell
+          filters: |
+            shared:
+              - 'test/**'
+              - 'package.json'
+              - 'bun.lock'
+              - 'bunfig.toml'
+              - 'tsconfig.json'
+              - '.github/workflows/ci.yaml'
+              - 'scripts/ts_test_auto.sh'
+            modules:
+              - 'registry/**/modules/**'
+            all:
+              - '**'
       - name: Set up Terraform
         uses: coder/coder/.github/actions/setup-tf@main
       - name: Set up Bun
@@ -27,7 +45,11 @@ jobs:
       - name: Install dependencies
         run: bun install
       - name: Run TypeScript tests
-        run: bun test
+        env:
+          ALL_CHANGED_FILES: ${{ steps.filter.outputs.all_files }}
+          SHARED_CHANGED: ${{ steps.filter.outputs.shared }}
+          MODULE_CHANGED_FILES: ${{ steps.filter.outputs.modules_files }}
+        run: ./scripts/ts_test_auto.sh
       - name: Run Terraform tests
         run: ./scripts/terraform_test_all.sh
       - name: Run Terraform Validate
diff --git a/scripts/ts_test_auto.sh b/scripts/ts_test_auto.sh
new file mode 100755
index 000000000..5f28e3385
--- /dev/null
+++ b/scripts/ts_test_auto.sh
@@ -0,0 +1,63 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# Auto-detect which TypeScript tests to run based on changed files from paths-filter
+# Uses paths-filter outputs from GitHub Actions:
+#   ALL_CHANGED_FILES - all files changed in the PR (for logging)
+#   SHARED_CHANGED - boolean indicating if shared infrastructure changed
+#   MODULE_CHANGED_FILES - only files in registry/**/modules/** (for processing)
+# Runs all tests if shared infrastructure changes
+#
+# This script only runs tests for changed modules. Documentation and template changes are ignored.
+
+echo "==> Detecting changed files..."
+
+if [[ -n "${ALL_CHANGED_FILES:-}" ]]; then
+  echo "Changed files in PR:"
+  echo "$ALL_CHANGED_FILES" | tr ' ' '\n' | sed 's/^/  - /'
+  echo ""
+fi
+
+if [[ "${SHARED_CHANGED:-false}" == "true" ]]; then
+  echo "==> Shared infrastructure changed"
+  echo "==> Running all tests for safety"
+  exec bun test
+fi
+
+if [[ -z "${MODULE_CHANGED_FILES:-}" ]]; then
+  echo "✓ No module files changed, skipping tests"
+  exit 0
+fi
+
+CHANGED_FILES=$(echo "$MODULE_CHANGED_FILES" | tr ' ' '\n')
+
+MODULE_DIRS=()
+while IFS= read -r file; do
+  if [[ "$file" =~ \.(md|png|jpg|jpeg|svg)$ ]]; then
+    continue
+  fi
+
+  if [[ "$file" =~ ^registry/([^/]+)/modules/([^/]+)/ ]]; then
+    namespace="${BASH_REMATCH[1]}"
+    module="${BASH_REMATCH[2]}"
+    module_dir="registry/${namespace}/modules/${module}"
+
+    if [[ -f "$module_dir/main.test.ts" ]] && [[ ! " ${MODULE_DIRS[*]} " =~ " ${module_dir} " ]]; then
+      MODULE_DIRS+=("$module_dir")
+    fi
+  fi
+done <<< "$CHANGED_FILES"
+
+if [[ ${#MODULE_DIRS[@]} -eq 0 ]]; then
+  echo "✓ No TypeScript tests to run"
+  echo "  (documentation, templates, namespace files, or modules without tests)"
+  exit 0
+fi
+
+echo "==> Running TypeScript tests for ${#MODULE_DIRS[@]} changed module(s):"
+for dir in "${MODULE_DIRS[@]}"; do
+  echo "  - $dir"
+done
+echo ""
+
+exec bun test "${MODULE_DIRS[@]}"