Set up Cursor Cloud dev environment + AGENTS.md notes

[lunelson]

What

Sets up the brunch development environment for Cursor Cloud agents and records durable, non-obvious caveats in AGENTS.md under ## Cursor Cloud specific instructions. No product code changed.

Environment setup performed

• Node: app requires >=22.19.0; default /exec-daemon/node is v22.14.0. Activated nvm v22.22.2 and made it the default for future shells via a one-time ~/.bashrc prepend (documented in AGENTS.md).
• Dependencies: npm install (set as the startup update script).
• Anthropic API key: ANTHROPIC_API_KEY is already provided via env, so the AI flows work without a .env file.

Verification

Service	Command	Result
Lint/format	npm run check	✅ 0 errors (11 warnings)
Tests (core)	npm run test	✅ core suite passes (2415+ tests)
Build	npm run build	✅ client + server-runtime built
Dev app	npm run dev	✅ Vite :5173 + API :3000 up

Test caveat: the optional cook orchestrator suite (src/orchestrator/) times out under full parallel load (passes per-file with raised timeouts); test-runner.test.ts needs bun and sandbox-guard.test.ts needs bwrap, neither installed. Details in AGENTS.md.

Hello-world end-to-end

Created a new specification "Hello World Recipe App" and kicked off the AI grounding interview. The Anthropic-backed interviewer streamed a real question, accepted an answer, and produced a contextual follow-up.

brunch_new_spec_interview_demo.mp4

Brunch home page
AI interviewer first question
AI interviewer follow-up

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