OpenCode Mobile lives at /OpenCode-Sandbox/opencode-mobile — a zero-dependency Node gateway (server.js) that serves a mobile web UI and reverse-proxies /api/* to the local OpenCode V2 service on 127.0.0.1, injecting its basic auth. The phone opens http://192.168.1.250:10999 and logs in with a shared password + HMAC cookie. Runs as systemd —user opencode-mobile.service (enabled, linger on). The old Windows-era :10999 setup is dead; this replaced it. Details: docs/API.md (V2 API contract), README.md (ops). Linked from Inbox.