Trello Agent Context

A Chrome DevTools extension that watches Trello-related network traffic for the inspected tab and builds a list of cards with optional lane (list) filtering and one-click export as Markdown or JSON. It is meant for copying structured card context into other tools while using your normal Trello session in the browser.

Requirements

• Chromium-based browser (Chrome, Edge, Brave, etc.) with extension support.
• DevTools open on the Trello tab you care about. The panel reads the same network log DevTools uses; it does not inject into the page.
• You must be logged into Trello and load a board (and optionally open cards) so the app issues the API calls this extension understands.

What gets captured

Only requests whose URL host is one of:

• trello.com or *.trello.com
• api.trello.com

Everything else is ignored (for example as.atlassian.com, analytics, or third-party power-ups).

Resource types: XHR, fetch, and document responses, same as the underlying DevTools hook.

Features

Board bulk list (no need to open each card)

When Trello loads the board, it usually fetches a large payload of visible cards and open lists. The extension parses responses such as:

• GET /1/board/{shortLinkOrId}?…&cards=visible&lists=open&operationName=quickload:CurrentBoardListsCards
• POST /gateway/api/graphql?operationName=quickload:TrelloCurrentBoardListsCards (GraphQL shape: flat lists/cards, nested lists with cards, or a bounded deep search for matching objects)

Each card is stored with at least id, name, idList (lane), and common fields when present (shortLink, shortUrl, desc, etc.).

Richer data when you open a card

Additional responses are merged into the same card record, for example:

• POST /1/cards/{id}/markAsViewed — marks which card was last focused in the UI.
• GET /1/card/{shortLink}?…&operationName=quickload:PreloadCard — full card payload (description, attachments, checklist ids, etc.).
• GET /1/checklist/{id}?… — checklist names and items.
• GET https://api.trello.com/1/cards/{id}/checklists?… — checklist bundles from the REST host.

Lane filter

Lists (lanes) come from the board bulk payload. The sidebar Lane control filters the card list by idList. All lanes shows every captured card.

Export

For the selected card:

• Copy Markdown — human-readable sections (title, link, lane, description, checklists, attachments, image URLs) plus a trailing fenced JSON block.
• Copy JSON — structured object suitable for tools and scripts.

Storage limits

The gear button opens Capture storage: retention window, max rows per URL pattern, and max total rows. Older rows are dropped when limits are exceeded (same storage mechanism as the original request visualizer fork).

UI overview

Installation and development

npm install
npm run build

Load unpacked:

1. Open chrome://extensions (or equivalent).
2. Enable Developer mode.
3. Load unpacked → choose the dist directory produced by the build.

Open the panel:

1. Navigate to a Trello board in a normal tab.
2. Open Developer Tools.
3. Find the Trello Agent Context DevTools panel (created next to Application, Network, etc.).

After code changes: run npm run build, reload the extension on chrome://extensions, then close and reopen DevTools so the panel picks up the new bundle.

Project layout (high level)

Privacy and security

• Processing is local to your browser; the extension does not send captured data to a custom backend.
• You are still subject to Trello’s terms and your workspace policies. This tool only reorganizes responses your browser already received.
• Exported Markdown/JSON may contain links or text from cards; treat exports like any other copy of workspace data.

Limitations

• If the board bulk request was garbage-collected or never fired (e.g. narrow retention), the card list may only contain cards you opened or touched.
• Checklist item text from the board bulk request may be minimal depending on Trello’s card_checklist_checkItems settings on that call; opening the card often loads full checklist rows.
• Atlassian batch endpoints (as.atlassian.com/api/v1/batch) are not on the Trello host allowlist and are not used.

License

MIT