Plannotator is a local, browser-based review surface for AI coding agents.
When an agent proposes a plan, writes HTML or finishes code, the work opens in your browser so you can annotate it, comment on diffs and send structured feedback straight back to the agent.
- 01
Plan, spec, Markdown and HTML annotation with one-click feedback to the agent
- 02
Diff and PR review across Git, GitButler, Jujutsu, Perforce, GitHub and GitLab
- 03
Ask AI and AI review comments posted directly on the diff
- 04
Hooks, skills and slash commands for Claude Code, Codex, Copilot CLI, Gemini CLI, OpenCode, Kiro, Droid, Amp and Pi
- 05
Encrypted share links, a standalone TUI and the Herdr terminal plugin
Open Source
Plannotator is free and open source, dual-licensed under Apache 2.0 or MIT; Workspaces is a separate hosted product.
Best for
Developers who review coding-agent plans and diffs closely and want a visual way to steer agents before and after implementation.
Not ideal for
Teams that only need automated PR bots without human-in-the-loop review, or users who never use plan modes in their agents.
A fast-moving, agent-agnostic review layer that makes human feedback on AI plans and code far more precise.
Plannotator shipped v0.28.4 through v0.28.8 in early October 2026, adding multi-file reviews, persistent comments after agent edits, the plannotator tool for Pi and OpenCode 2, and Ask AI line references.
As of
Is Plannotator free?+
Yes - Plannotator is Open Source. Plannotator is free and open source, dual-licensed under Apache 2.0 or MIT; Workspaces is a separate hosted product.
Is Plannotator open source?+
Yes - Plannotator is open source. Plannotator is free and open source, dual-licensed under Apache 2.0 or MIT; Workspaces is a separate hosted product.
Who is Plannotator best for?+
Developers who review coding-agent plans and diffs closely and want a visual way to steer agents before and after implementation.
Who is Plannotator not ideal for?+
Teams that only need automated PR bots without human-in-the-loop review, or users who never use plan modes in their agents.
What are the best Plannotator alternatives?+
The closest Plannotator alternatives on ai.dosa.dev are CodeRabbit, Qodo, Snyk Code - all listed under AI Code Review & Security.
Who makes Plannotator?+
Plannotator is developed by backnotprop. It is listed in the AI Code Review & Security category on ai.dosa.dev.
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