Add Cursor Cloud specific instructions to AGENTS.md

[ntucker]

Motivation

Adds development environment setup notes for Cursor Cloud agents so future agents can start services and run tests without re-discovering environment caveats.

Solution

Appended a ## Cursor Cloud specific instructions section to AGENTS.md covering:

• Node version requirement (24 via .nvmrc)
• Corepack/Yarn 4 setup
• Build-before-test dependency
• Lint scope (CI uses packages/*/src)
• Website dev server startup
• No external services needed

Verification

• yarn lint --quiet packages/*/src — clean
• yarn test --ci — 109 suites, 1530 tests passed
• yarn build — all packages built
• Website dev server (yarn start:vscode) — Docusaurus running on port 3000

website_demo_walkthrough.mp4
Documentation homepage

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1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
docs-site	Ignored		Apr 10, 2026 0:55am

[changeset-bot]

⚠️ No Changeset found

Latest commit: 60483a4

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.11%. Comparing base (bba821c) to head (60483a4).
⚠️ Report is 6 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #3892   +/-   ##
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  Coverage   98.11%   98.11%           
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  Files         153      153           
  Lines        2916     2916           
  Branches      566      566           
=======================================
  Hits         2861     2861           
  Misses         11       11           
  Partials       44       44           

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