Open Plan Annotator – Annotate your agent's plans like a Google doc
Claude plan review UI, but only works inside Claude Code's closed ecosystem.
Local-first agent plan annotator
Plan review loop with markup feedback—but agent planning UI is already Claude's bottleneck, not yours.
Developers using Claude Code or OpenCode who want human-in-the-loop control over agent planning before implementation.
Claude Code built-in plan review · GitHub Copilot's request changes flow
Claude plan review UI, but only works inside Claude Code's closed ecosystem.
Visual plan annotations with E2E encryption feed feedback directly back to nine agent harnesses.
Plan-mode plugin for Pi Coding Agent, but existing Claude Code version already exists.
You can hit /plannotator-annotate or run a local CLI to open a Markdown file in an annotation UI, make deletions/replacements/comments (even attach images), and export feedback as structured markdown that an agent can act on. It's a focused, practical tool for teams that already use agent plan modes — neat UX touches (browser UI + blocking CLI flow) but it stops short of broader integrations like PRs or VCS hooks that would make it indispensable.
MCP-integrated review gates for AI agents—annotation-driven handoffs save context across sessions.
Finally, inline comments on AI plans before the agent wastes tokens writing bad code.