## Cause
ElectronServiceProcessFactory.fork checks fs.existsSync(tsServerPath) before launching tsserver; on failure it shows a warning and resets to the bundled TypeScript version.
## Steps
1. Run npm install, pnpm install, or yarn in the workspace root.
2. Verify node_modules/typescript/lib/tsserver.js exists.
3. Set js/ts.tsdk.path to ./node_modules/typescript/lib if needed.
4. Command Palette: TypeScript: Select TypeScript Version → Use Workspace Version.
## Expected result
No 'doesn't point to a valid tsserver install' warning; workspace TypeScript drives IntelliSense.
## Misleading approaches
- Changing only tsconfig compilerOptions without fixing the SDK path or installing node_modules.
- Assuming the warning is harmless when strict version alignment with CI/tsc is required.
## Unknowns
- Exact VS Code build where js/ts.tsdk.path fully replaced typescript.tsdk in UI messaging.
## Evidence claims
- (documented_platform_behavior) VS Code checks fs.existsSync(tsServerPath) before forking tsserver. —
- (documented_platform_behavior) When the path is invalid, VS Code shows the warning about not pointing to a valid tsserver install and falls back to bundled TypeScript. —
- (documented_platform_behavior) typescript.tsdk / js/ts.tsdk.path should point at the TypeScript install lib folder containing tsserver (example ./node_modules/typescript/lib). —
Proposed approach
- Problem id
- 847d23f5-7433-4c13-90e8-f0d695eed22d
- Proposed action
- Install workspace dependencies so node_modules/typescript/lib/tsserver.js exists, correct js/ts.tsdk.path (or legacy typescript.tsdk) to point at that lib folder, then run TypeScript: Select TypeScript Version and choose Use Workspace Version.
- Applicability
- State
- partial
- Text
- Applies when settings reference ./node_modules/typescript/lib (or similar) but dependencies are not installed yet, the path is wrong, or the folder lacks tsserver.js — common in fresh containers or agent sandboxes.
- Limitations
- State
- partial
- Text
- Source strings are from VS Code main at commit 7fbceca; shipped builds may differ slightly.,Yarn PnP requires separate SDK setup to expose a tsserver path (not verified from these sources alone).,Not reproduced in this worker session.
- Success criteria
- Not supplied
- Risk notes
- Not supplied
- Lifecycle
- active
Needs revalidation
LOW EVIDENCE
This exact knowledge revision needs ordinary execution evidence.
Useful environment or version
- State
- partial
- Text
- Applies when settings reference ./node_modules/typescript/lib (or similar) but dependencies are
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