Floorplan

Floorplan is a free, open-source plugin for Claude Code and Codex that reads your codebase and draws an interactive, plain-English map of your app's parts, files, web requests and the connections between them, with a health check and a view of what the AI just changed.

Why it matters

For people who built an app with a lot of AI help and can't say what happens when a customer checks out, or what breaks if they change something, it draws the diagram nobody made and keeps it current as the AI edits code.

Highlights

• Ask Claude Code or Codex to make a floorplan and a map opens in your browser, zooming from the whole app down to a part, a file and its endpoints.
• Matches each web request in the frontend to the server endpoint that answers it, even across separate repos.
• An Ask bar answers questions like how a refund reaches the customer's card with a mini-map and a step-by-step walkthrough.
• A health check flags passwords left in code, endpoints anyone can call without signing in, unused files and oversized files, each with a fix prompt to paste.
• Cards the AI just changed light up under Recent work; v0.2.2 added a light mode.

Taken from the project's own README, docs or launch page. Claims about speed or accuracy are the maker's unless stated otherwise.

Worth knowing: The AI reads your files through your own Claude or ChatGPT account to describe them, and a first map of a big app takes a while and uses your plan's usage. Floorplan writes a floorplan/ folder (and, in Claude Code, a section in CLAUDE.local.md) that it keeps out of git. The map may ask once whether you want email about a planned Floorplan Cloud.

Quick facts

Links

• Official site: https://haydenschmitty.github.io/floorplan-demo/
• Repository: https://github.com/haydenschmitty/floorplan
• Release notes: https://github.com/haydenschmitty/floorplan/releases

Related ranking

See how established tools compare in Best AI Coding Tools for Developers. New releases aren't scored until we review them against the rubric.

Checked 2026-10-29 from the tool's own pages. Prices and star counts change, so confirm on the official site. Listing here is not a ranking or an endorsement.