Plannotator opens a local diff viewer (git, jj, p4). You annotate lines, tokens, or comment on files, and when you re done they feed straight into your agent session; creating an automated feedback loop.It works on local diffs, commits, branches, worktrees, and GitHub/GitLab PRs. The PR view lets you annotate the descriptions and comments while also being able to filter bot comments.The core tool enables focused manual review, the optional AI layer: - Ask AI: Ask questions directly inline - Guided Reviews: Have an agent reorganize a large diff into semantic overview sorted by importance (inspired by linear) - Review Agents: Run review agents whose findings land as inline annotations. Review jobs can be your own skills that plannotator links to locally. There s also a local API, your agents can POST findings or other markers/insights/notes onto the diff. Every annotation you make is saved to ~/.plannotator. Point an agent at that history and repeated feedback distills into a custom review skill (compound engineering).Plannotator works with most agents and the AI features utilize core model subscription providers.Free, MIT/Apache 2.0, runs entirely on your machine.https://github.com/backnotprop/plannotator