Plannotator
Interactive Plan & Code Review for AI Coding Agents. Mark up and refine your plans or code diffs using a visual UI, share for team collaboration, and seamlessly integrate with Claude Code, Copilot CLI, Gemini CLI, OpenCode, Pi, and Codex.
Plan Mode Demos:
New: Code Review
Features
| Visual Plan Review | Built-in hook | Approve or deny agent plans with inline annotations |
| Plan Diff | Automatic | See what changed when the agent revises a plan |
| Code Review | /plannotator-review | View git diffs or remote PRs. Package annotations and ask AI about the code as you review. |
| Annotate Any File | /plannotator-annotate | Annotate any markdown file and send feedback to your agent |
| Annotate Last Message | /plannotator-last | Annotate the agent's last response and send structured feedback |
Sharing Plans
Plannotator lets you privately share plans, annotations, and feedback with colleagues. For example, a colleague can annotate a shared plan, and you can import their feedback to send directly back to the coding agent.
Small plans are encoded entirely in the URL hash. No server involved, nothing stored anywhere.
Large plans use a short link service with end-to-end encryption. Your plan is encrypted with AES-256-GCM in your browser before upload. The server stores only ciphertext it cannot read. The decryption key lives only in the URL you share. Pastes auto-delete after 7 days.
- Zero-knowledge storage, similar to PrivateBin
- Fully open source and self-hostable (see docs)
Install
Install for Claude Code
Install the plannotator command:
macOS / Linux / WSL:
curl -fsSL https://plannotator.ai/install.sh | bash
Windows PowerShell:
irm https://plannotator.ai/install.ps1 | iex
Then in Claude Code:
/plugin marketplace add backnotprop/plannotator
/plugin install plannotator@plannotator
# IMPORTANT: Restart Claude Code after plugin install
See apps/hook/README.md for detailed installation instructions including a manual hook approach.
Install for Copilot CLI
Install the plannotator command:
macOS / Linux / WSL:
curl -fsSL https://plannotator.ai/install.sh | bash
Windows PowerShell:
irm https://plannotator.ai/install.ps1 | iex
Then in Copilot CLI:
/plugin marketplace add backnotprop/plannotator
/plugin install plannotator-copilot@plannotator
Restart Copilot CLI after plugin install. Plan review activates automatically when you use plan mode (Shift+Tab to enter plan mode).
See apps/copilot/README.md for details.
Install for Gemini CLI
Install the plannotator command:
macOS / Linux / WSL:
curl -fsSL https://plannotator.ai/install.sh | bash
Windows PowerShell:
irm https://plannotator.ai/install.ps1 | iex
The installer auto-detects Gemini CLI (checks for ~/.gemini) and configures the plan review hook and policy. It also installs /plannotator-review and /plannotator-annotate slash commands.
Then in Gemini CLI:
/plan # Enter plan mode — plans open in your browser
/plannotator-review # Code review for current changes
/plannotator-review <pr-url> # Review a GitHub pull request
/plannotator-annotate <file.md> # Annotate a markdown file
Requires Gemini CLI 0.36.0 or later.
See apps/gemini/README.md for details.
Install for OpenCode
Add to your opencode.json:
backnotprop
