getreadystack/mv3-manifest-preflight repository overview

⁠MV3 Manifest Preflight - Chrome Web Store

25 rules over manifest.json: every line Manifest V3 or the Chrome Web Store upload refuses, with the fix beside it. The shipped MV2 fixture returns 19 findings, 16 of them errors that block the upload; the migrated file returns 0.

⁠Run

docker run --rm -v "$PWD":/work getreadystack/mv3-manifest-preflight /work/file

The same 25 rules as the VS Code extension, in a container. Mount a folder on /work.

⁠Free

• Open any manifest.json and see every Manifest V3 and Chrome Web Store upload blocker in it, all 25 rules, each with the exact replacement line - one file, finished, no key.
• --rules lists every rule

⁠With a licence ($29 once)

• Scan every manifest.json in the workspace in one run and export the pre-submission report as a file you keep: Markdown for the reviewer, JSON for CI.

docker run --rm -e READYSTACK_LICENSE=<key> -v "$PWD":/work getreadystack/mv3-manifest-preflight --dir /work --ci

A contract extension developer at $80/h costs more than the licence after 22 minutes of resubmission rework, and a rejected upload restarts the Chrome Web Store review queue.

⁠Use from an AI agent (MCP)

Claude Code · Cursor · Windsurf · any MCP client - add to your MCP config:

{ "mcpServers": { "mv3-manifest-preflight": { "command": "npx", "args": ["-y", "@readystack/mv3-manifest-preflight", "--mcp"] } } }

Tools: check_text and check_file (free) · check_dir (licence). The agent gets every finding with the line number.

⁠Use in CI

- name: MV3 Manifest Preflight - Chrome Web Store
  run: npx -y @readystack/mv3-manifest-preflight --dir . --ci

(container: docker run --rm -v "$PWD:/work" getreadystack/mv3-manifest-preflight --dir /work --ci)

The folder sweep, reports and CI mode need one licence — one payment, no subscription. Set READYSTACK_LICENSE=<key> or run --license <key> once.

Get a licence⁠