docs: add Cursor Cloud environment setup notes

[VirusPC]

Summary

Sets up the Cloud Agent development environment for this repo and documents durable, non-obvious caveats for future agents. The only code change is an addition to AGENTS.md (a new ## Cursor Cloud specific instructions section); no application code, lockfiles, or scripts were modified.

This repo contains two independent projects (the root README.md has a committed merge conflict describing both):

• Edges pnpm workspace — primary product; the runnable service is the new-note MCP server (extensions/mcp-servers/new-note).
• claude-agent-sdk-test — secondary Python starter.

What was installed

• Node deps via pnpm install (workspace). Note: pnpm-lock.yaml pins a private registry (artifactory.devops.xiaohongshu.com) that is unreachable from Cloud for a few packages; those tarballs were seeded from public npm so the snapshot's node_modules is complete. pnpm install is now a no-op on future boots.
• Python deps via pip install --user -e ..

Verification (all green)

Service	Lint	Build	Test	Run / Hello-world
new-note MCP server	not configured (no lint tooling)	pnpm -r run build (tsc) ✓	node --test --import tsx test/*.test.ts → 9/9 ✓	pnpm dev:note-server (tsx, HTTP :3000); called new_note via MCP client → created + committed a note ✓
claude-agent-sdk-test (Python)	n/a	n/a	python3 -m unittest discover -s tests → 2/2 ✓	CLI agent needs Anthropic creds (not required for tests)

The hello-world exercised the server's core purpose: an MCP client called the new_note tool over Streamable HTTP, which ran the ingest script and created/committed knowledge/notes/…md — sandboxed to a scratch repo with EDGES_DRY_RUN=true so the real repo was untouched.

Environment setup evidence log

Update script

• pnpm install --prefer-offline
• pip install --user -e .

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