TASKS — F-001 Scaffold modular monolith skeleton

TASK-001 Init project/ package: package.json (type module), tsconfig strict, .gitignore
TASK-002 Add Fastify + shared error envelope + build-app.ts composition root
TASK-003 Add health exemplar module (index.ts public API, routes, tests)
TASK-004 Add HTTP server entrypoint (src/infrastructure/http/server.ts)
TASK-005 Add boundary checker script + fixtures proving it fails on violations
TASK-006 Add toolchain: ESLint flat config (incl. no deep cross-module imports), Prettier, Vitest
TASK-007 Wire npm scripts: build, lint, lint:boundaries, typecheck, test, start
TASK-008 Write project README with run commands
TASK-009 Run full verification and write implementer evidence

Each task is independently understandable and leaves the tree consistent.