Plannotator for Copilot CLI

Interactive plan review, code review, and markdown annotation for GitHub Copilot CLI.

Install

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).

When you use plan mode in Copilot CLI:

The agent writes plan.md to the session state directory
The agent calls exit_plan_mode to present the plan
The preToolUse hook intercepts this and opens the Plannotator review UI in your browser
You review the plan, optionally add annotations
Approve → the plan is accepted and the agent proceeds
Deny → the agent receives your feedback and revises the plan

Command	Description
`/plannotator-review`	Open interactive code review for current changes or a PR URL
`/plannotator-annotate <file>`	Open interactive annotation UI for a markdown file
`/plannotator-last`	Annotate the last rendered assistant message

Variable	Description
`PLANNOTATOR_REMOTE`	Set to `1` / `true` for remote mode, `0` / `false` for local mode, or leave unset for SSH auto-detection. Uses a fixed port in remote mode; browser-opening behavior depends on the environment.
`PLANNOTATOR_PORT`	Fixed port to use. Default: random locally, `19432` for remote sessions.
`PLANNOTATOR_BROWSER`	Custom browser to open. macOS: app name or path. Linux/Windows: executable path.
`PLANNOTATOR_SHARE`	Set to `disabled` to turn off URL sharing.

Plan mode requires the plannotator CLI to be installed and on PATH
/plannotator-last parses events.jsonl from the Copilot CLI session state directory — format may change between Copilot CLI versions