Meetboard

• 0bots join the call
• 9 sper board update on a replayed meeting; the first takes 16 s
• 30boxes at most, labels of up to 6 words
• 3tools Claude can use: Read, Grep and Glob

How it works

1. Captions are sent

   A Chrome extension reads the live captions Meet shows and sends new lines every second.

2. An update is due

   After 40 new words, or 6 s without speech, and only once the last update has finished.

3. Claude reads the code

   It works out what was meant despite caption errors, reads that system's docs and code, and returns a Mermaid flowchart.

4. The board redraws

   An Excalidraw page draws it, fills new boxes yellow, and is presented into Meet as a tab.

In the meeting

• Reads the captions Meet already shows

  It reads them in the presenter's browser. Nobody is added to the call and no audio is recorded.

• Readable on a shared screen

  Each group of connected boxes is laid out on its own, and the groups are packed into columns to fit the screen.

• Steered from the board

  Pause holds new versions back. A typed note, such as 'only the deploy path', takes priority over speech in the next update.

• Claude can read only the listed repos

  Anyone in the call can ask it for something, so it has no shell, web or MCP, and .env and .pem files are refused.

Under the hood

Extension

Chrome MV3 in plain JavaScript, no build step. Posts only to its own server.

Server

FastAPI on a Raspberry Pi: one claude -p run at a time, one Claude session per meeting

Model

claude-sonnet-5-5 by default, answering {changed, mermaid, topic, summary}

Filtering

Lines with click, %%, styles, HTML or javascript: are dropped; Mermaid runs at strict security

Board

React, @excalidraw/excalidraw and @excalidraw/mermaid-to-excalidraw

Stored

Every drawn version as an .excalidraw file; captions are deleted after 30 days

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