visual: headless browser harness for the canvas client JS#147
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Throwaway canvas on 127.0.0.1 behind a stallable TCP proxy, driven by Playwright chromium — covers the client-side behaviour pytest can't reach: SSE watchdog/self-heal incl. silently stalled streams (#137), poll cadences and hidden-tab gating (#141), token sheet / toast / offbar flows (#142), and e-ink toast legibility (#146). 18 checks; /input is always route-intercepted so no keystrokes can reach live tmux panes.
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Moves the PR #144 verification rig into the repo at
packages/visual/tests/browser/so it outlives the session that built it.127.0.0.1:8791(MEDIA_VISUAL_TRUST_TAILNET=1, video off) behind a stallable TCP proxy — pausing the proxy sockets is the only way to reproduce a silently stalled SSE stream for the canvas: SSE stream can silently stall (no heartbeat/watchdog) and has no client cap #137 watchdog./agentsmemoization + collapsed/expanded/hidden cadences (canvas: /agents polling is a subprocess storm and drains phones #141), 401→toast→token-sheet→retry, Esc-cancel, error-detail toast, offbar/self-heal, no nativeprompt()(canvas: prompt() token/seek fallbacks are dead-ends on a keyboardless wall; disconnect illegible #142), e-ink theme + solid-toast regression (visual: e-ink override for #toast #146).MEDIA_HARNESS_SRC=<worktree>/packages/visual/srctests any branch without reinstalling./inputis always route-intercepted in the browser — keystrokes can never reach live tmux panes. The live wall service is untouched.Verified:
node harness.jsfrom this branch → 18/18 passed. Setup (npm install +npx playwright install chromium) documented in the README.🤖 Generated with Claude Code