excalidraw tested by Argusic Runner

What the test found

yarn install, yarn start (dev server on :3001), the production build served on :5001, yarn build:packages, tsc, eslint, prettier and the full 1862-test vitest suite all succeed on Node 22, and the editor verifiably renders and draws in a real browser.

No third-party keys required. The committed Firebase config is a public dev project; the collab WS server (localhost:3002, separate repo) and AI backend (localhost:3016) are optional and were absent, yet the app loaded and drew with zero console errors, so no mock was needed. Full suite: 123 test files / 1862 tests passed, 0 failed. tsc, eslint (--max-warnings=0) and prettier all clean. Production build and all 6 library packages build successfully. Real headless-Chromium e2e on both dev server and served production build: toolbar and canvases render and a mouse-drag creates a genuine rectangle element in the scene. Unfixed doc nit: development.mdx says to open localhost:3000 but .env.development sets VITE_APP_PORT=3001. Repo diff is 3 lines; yarn.lock untouched.

Argusic installed excalidraw in 4 minutes and launched it; verification reached Verified running for real. 4 of 4 recorded errors were worked through (see the timeline below).

Runsall runs of excalidraw

This summary is drawn from the agent's recorded report for this run. Every figure traces to the log and recording above; nothing here is authored.