[sigsegv0x0b]

Issue for this PR

Related to #47612

Type of change

• Bug fix
• New feature
• Refactor / code improvement
• Documentation

What does this PR do?

Adds a native android-arm64 build target so @opencode/cli installs and runs on Termux/Android without glibc-runner.

• Add { os: "android", arch: "arm64" } and map it to Bun's bun-linux-arm64-android, including the bun-linux-aarch64-android release asset name. Publish android in the distribution package os list so npm stops rejecting the install.
• Build opencode-pty for aarch64-linux-android and publish @opencode/pty-android-arm64. The Ghostty build pins API 28 (so Zig does not consult getprop on Termux) and the daemon uses TMPDIR for its socket because Android has no writable /tmp.
• Embed the Android fff native library through the existing @ff-labs/fff-bun patch so file search works in the compiled binary.
• Add an Android job to the process-daemon release workflow with the NDK, a Zig libc spec, and the API 28 linker. On-device tests are skipped for that target.

Dependencies: this is a draft until two releases exist:

1. anomalyco/opentui needs an @opentui/core-android-arm64 prebuild; the published @opentui/core@0.8.0 rejects android-arm64 at runtime. The opencode side alone gets npm install working but the TUI would still fail.
2. @opencode/pty@0.4.0 is already published without the android optional dependency, so the CLI build needs a new @opencode/pty release (and a pin bump here) before it can resolve @opencode/pty-android-arm64.

I can mark this ready and bump the pins once both are released.

How did you verify your code works?

On Termux (Android aarch64, SDK 37), using a locally built libopentui.so and opencode-pty for the same commit:

• opencode --version and --help run natively (bionic ELF, /system/bin/linker64).
• opencode --standalone renders the TUI (logo, prompt, status bar) with the native render library; no Unsupported OpenTUI Node asset target error.
• opencode-pty play spawns Termux bash, captures output, and prints parsed libghostty screen state.
• bun run typecheck in packages/cli, cargo fmt --check, and Prettier pass.

The Android release job itself has not run on GitHub Actions yet; it is new in this PR.

Visual

<svg xmlns="http://www.w3.org/2000/svg" width="240" height="72" viewBox="0 0 240 72" fill="none">
  <style>
    .cursor { animation: blink 1.1s steps(1) infinite; }
    .badge { animation: rise 2.6s ease-in-out infinite; transform-origin: 186px 36px; }
    .scan { animation: scan 2.6s linear infinite; }
    @keyframes blink { 0%, 49% { opacity: 1 } 50%, 100% { opacity: 0 } }
    @keyframes rise { 0% { opacity: 0; transform: translateX(-8px) scale(.92) } 30%, 100% { opacity: 1; transform: none } }
    @keyframes scan { 0% { transform: translateY(0) } 100% { transform: translateY(38px) } }
    @media (prefers-reduced-motion: reduce) { .cursor, .badge, .scan { animation: none } }
  </style>
  <rect x="1" y="1" width="238" height="70" rx="8" stroke="currentColor" stroke-opacity=".28"/>
  <path d="M18 25 L30 36 L18 47" stroke="currentColor" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round" fill="none" opacity=".9"/>
  <rect x="40" y="27" width="78" height="5" rx="2.5" fill="currentColor" opacity=".55"/>
  <rect x="40" y="38" width="44" height="5" rx="2.5" fill="currentColor" opacity=".26"/>
  <rect x="88" y="38" width="6" height="5" rx="1" class="cursor" fill="currentColor"/>
  <g class="badge">
    <rect x="148" y="25" width="76" height="22" rx="11" stroke="currentColor" stroke-opacity=".45" fill="currentColor" fill-opacity=".07"/>
    <circle cx="161" cy="36" r="4" fill="currentColor" opacity=".85"/>
    <rect x="171" y="33.5" width="43" height="5" rx="2.5" fill="currentColor" opacity=".7"/>
  </g>
  <rect class="scan" x="12" y="18" width="216" height="1" fill="currentColor" opacity=".16"/>
</svg>

Screenshots / recordings

No screenshot: the TUI was exercised over a headless Termux pty, so the output is terminal escape sequences rather than an image.

Checklist

• I have tested my changes locally
• I have not included unrelated changes in this PR