docs: move plan docs to GitHub issues, delete stale PR docs

[eenlars]

• Delete alive-agents.md + alive-agents-hard-problems.md → Background agents: replace SSE chat with persistent agent runs #36
• Delete agent-supervisor.md → Agent supervisor: auto-evaluate and suggest next action #37
• Delete subdomain-deployment.md → One-click subdomain deployment UX #38
• Delete docs/archive/prs/worktrees/stage-{2,3,4}.md (implemented in PR Add worktrees feature implementation plan documents #10/Worktrees #12)
• Fix referral-system.md header: was "not implemented" but is fully implemented

Summary by CodeRabbit

Documentation

• Archived worktrees specification documentation from the repository.
• Removed draft documentation for Agent Supervisor, Alive Agents, and Subdomain Deployment features.
• Updated referral system documentation metadata to reflect implemented status.

[coderabbitai]

Caution

Review failed

The pull request is closed.

📝 Walkthrough

Walkthrough

This PR removes multiple archived and feature documentation files from the repository, including worktrees staging documentation (Stages 2–4), Agent Supervisor, Alive Agents, Alive Agents Hard Problems, and Subdomain Deployment specifications. The referral-system documentation metadata is updated to reflect its implemented status.

Changes

Cohort / File(s)	Summary
Worktrees Archived Stages docs/archive/prs/worktrees/stage-2-server-api.md, docs/archive/prs/worktrees/stage-3-workspace-resolution.md, docs/archive/prs/worktrees/stage-4-client-ui.md	Removed archived worktrees documentation describing server API routes, workspace resolution flow, and client UI implementation plans.
Feature Documentation Removals docs/features/agent-supervisor.md, docs/features/alive-agents.md, docs/features/alive-agents-hard-problems.md, docs/features/subdomain-deployment.md	Deleted comprehensive feature specifications and design documentation for agent supervisor, alive agents system, associated hard problems, and subdomain deployment architecture.
Referral System Metadata docs/features/referral-system.md	Updated documentation header to change type from SPECIFICATION (not implemented) to Feature documentation, status from COMPLETE to Implemented, and removed Owner field.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Possibly related PRs

• Add worktrees feature implementation plan documents #10: Directly related as it removes the same Stage 2–4 worktrees documentation files that were originally added, consolidating archival decisions.
• Worktrees #12: Related through removal of archived worktrees documentation that was part of the original worktrees feature implementation.

Poem

📚✨ Old docs find their rest,
In archives, stored away—
The referral shines bright,
Fresh metadata set right,
Hopping forward to cleaner display! 🐰

✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch codex/sdk-0-2-34-full-audit

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands and usage tips.}