fix(launch): Expo SDK 52->54 in HN/Reddit copy; add reply-flow E2E evidence; version refs
- Launch posts claimed Expo SDK 52 but app is on SDK 54 (factual accuracy before public posting — HN/Reddit devs check this) - docs/qa/REPLY-FLOW-E2E-2026-06-08.md: verified send->streaming reply works against the live opencode server via app-identical sdk.ts calls (free model); closes the 'opencode can't reply in CI' residual at the data-contract level - owner-submissions.md: 0.4.3 -> 0.4.4 Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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# Show HN — copy-paste ready
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> Post once. HN allows a single submission per project. Tue–Thu, 8:00–10:00am US Eastern is the sweet spot.
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> `{{PLAY_URL}}` = swap in `https://play.google.com/store/apps/details?id=cc.agentlabs.opencode` on the day Play approval lands. Until then, leave the Play line exactly as written below.
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---
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**Title (use exactly — under 80 chars, no emoji, no "free"):**
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```
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Show HN: OpenCode Mobile – drive your self-hosted AI coding agent from your phone
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```
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**URL field:** `https://github.com/dzianisv/opencode-mobile`
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---
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**Text (paste into the "text" box if you submit as a text post; otherwise post as the first comment immediately after submitting):**
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Hey HN,
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I built a React Native / Expo Android app that lets you control a running [opencode](https://github.com/sst/opencode) session from your phone.
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**What it does**
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opencode (sst/opencode, MIT) is a terminal-based AI coding agent — you run it on your laptop or a server, it talks to Claude / GPT / Gemini / local models via your own API keys, and it writes, edits, and runs code through tool calls. OpenCode Mobile is a thin HTTP + SSE client that connects to that server process. From your phone you can:
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- Watch token-by-token streaming output as the agent reasons and codes
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- Review inline file diffs before they're written
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- Approve or reject tool calls (file writes, shell commands) in real time
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- Start, resume, and switch between sessions
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- Connect over local Wi-Fi, Tailscale, Cloudflare Tunnel, or ngrok
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**Why I built it**
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I run long opencode sessions that outlast my desk time. I wanted to check in from the couch, approve a tool call, and let the agent keep going. The alternatives — SSH + a terminal app, or generic Claude/GPT chat apps — lose the structured session state: no diffs, no tool-call gating. The opencode HTTP API was already there; the phone just needed a real client.
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**How it's built**
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- React Native + Expo SDK 54, TypeScript throughout
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- SSE streaming via an `EventSource` polyfill (RN has no native one); needed patching because Android's OkHttp drops the `Accept: text/event-stream` header across redirects, which breaks reconnects
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- Diff rendering with a custom line-level parser into a FlatList — no WebView, so dark-mode theming stays consistent and it's cheap to render
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- Biometric auth via `expo-local-authentication` gates app-open and individual sends
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- Connection secrets in the Android Keystore via `expo-secure-store`
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- CI builds a signed AAB on every tag via GitHub Actions + EAS
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**What it is not**
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Not a standalone AI model and not a code editor. You need a running opencode server. If you already use opencode, setup is:
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```
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npm install -g opencode-ai
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OPENCODE_SERVER_PASSWORD=yourpassword opencode serve --hostname 0.0.0.0 --port 4096
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```
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…then paste the URL into the app. Your API keys stay on your server; nothing proxies through any backend of mine.
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**Status / privacy**
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Stable on Android, MIT licensed. No accounts, no ads. Sentry crash reporting is opt-in and off by default. Install today via a self-hosted F-Droid repo or a direct signed APK. Google Play is in review and should be live shortly — {{PLAY_URL}} (currently in review; until then use the links below).
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- Source: https://github.com/dzianisv/opencode-mobile
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- Install (F-Droid + APK, one page): https://dzianisv.github.io/opencode-mobile/download/
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- Landing page: https://dzianisv.github.io/opencode-mobile/
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- Setup guide: https://dzianisv.github.io/opencode-mobile/guide/
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- F-Droid repo (add this URL in an F-Droid client): https://dzianisv.github.io/opencode-mobile/fdroid/repo
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- Direct APK: https://github.com/dzianisv/opencode-mobile/releases/latest
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Happy to answer questions about the SSE streaming implementation, the Expo build pipeline, or the opencode API surface.
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