jssblck

Use when working in a repository that uses eph for ephemeral dev services (a `.eph` file exists, or `eph` is on PATH). Covers the local loop: start per-workspace services with `eph up`, load their connection details with `eph env`, and tear them down with `eph down` / `eph clean`. Also covers detecting an eph workspace, reading the `.eph` file, and the auto-assigned ports that mean you must never hardcode a connection string.

Build, launch, and drive this site to verify a change end to end. Use whenever a change to the shell (app/shell.tsx), the games, or public/ assets needs runtime confirmation, not just typecheck.