Add AGENTS.md and PR merge guidance

[Luen]

Summary

• Add or update AGENTS.md as the agent source of truth (agents.md).
• Migrate any .cursor/rules/*.mdc into AGENTS.md and remove those Cursor rule files.
• Instruct agents to read all PR comments and wait for CI to succeed before merging.

Test plan

• Confirm AGENTS.md is present and includes the Pull requests section
• Confirm .cursor/rules is gone if it previously existed

Summary by CodeRabbit

• Documentation
  • Added repository guidance covering project setup, coding conventions, security practices, endpoint requirements, validation commands, and pull-request checks.

[github-actions]

🟢 Claude BugBot Analysis

The diff only adds a new AGENTS.md documentation file with no code changes; there is nothing to review for logic errors, security issues, or other code defects.

No bugs were detected in this PR.

[coderabbitai]

Caution

Review failed

The pull request is closed.

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: af1f70c1-1852-4b70-9c74-4ad9940959b1

📥 Commits

Reviewing files that changed from the base of the PR and between 1c3ea88 and 8c2ee0c.

📒 Files selected for processing (1)

• AGENTS.md

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📝 Walkthrough

Walkthrough

Added AGENTS.md with repository guidance for the Chrome extension, setup commands, coding conventions, security practices, and pull-request checks.

Changes

Repository Guidance

Layer / File(s)	Summary
Repository setup and contribution guidance AGENTS.md	Documents the project overview, required dreeve version and endpoint, setup and validation commands, coding conventions, secret handling, and CI/review requirements.

Estimated code review effort: 1 (Trivial) | ~2 minutes

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch chore/agents-md

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