Documents the full browser-to-agent feedback architecture: state machine,
file-based polling, port discovery, post-submit lifecycle, and every known
edge case (zombie forms, dead servers, stale spinners, file:// bug,
double-click races, port coordination, sequential generate rule).
Includes ASCII diagrams of the data flow and state transitions, complete
step-by-step walkthrough of happy path and regeneration path, test coverage
map with gaps, and short/medium/long-term improvement ideas.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
