- tsconfig.json simulates pi's ESM TypeScript runtime
- Resolves peer deps from pi's global node_modules
- 'type: module' added to package.json (correct — pi loads as ESM)
- Fixes found by tsc:
- buffer/writer.ts: correct Dirent import from node:fs
- messages.ts: toolCall id/name may be undefined, default to empty string
- Remaining warnings: pi event API names (session_switch etc.) not in types;
these are guarded with try/catch at runtime — acceptable
- npm run typecheck: tsc --noEmit
