Install the review plugin for Claude Code and Codex.

The files cover both halves of the workflow: understanding notes already in a document, and starting a new review round.

The skill is a Claude Code plugin. It needs Imark in the Applications folder and Node 20 or later.

/plugin marketplace add migsilva89/imark
/plugin install imark@imark

Two commands, once installed. The first opens a document in Imark and blocks until you decide; the second returns the notes still waiting on something.

/imark:imark-review PLAN.md
/imark:imark-notes PLAN.md

Ask the agent to write the implementation plan first, then open it with the review command. It pauses while you check scope, architecture, risks, tests and completion criteria, and continues only once you approve or it has worked through every request.

Each note is a structured HTML comment beside the phrase it refers to. Normal renderers hide it, Git carries it with the document, and the skill gives the agent the exact context it needs without any separate review service.

Other tools open the plan in a browser tab and keep the comments in their own storage. Imark opens the file itself, on your Mac, and writes the notes into the document, so the review survives the tool: the record is in the file, in the repository, in the diff. It is free and open source, with no server to run and no account to create.

Use it for documents that need a human decision before work starts. It is not a code review tool: GitHub and your editor remain the right place to review a diff.