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05 — Claude Code on Termux

The reason this whole repo exists. Two non-obvious things break Claude Code on Termux:

Version ceiling: v2.1.112. Starting v2.1.113, the CLI ships as a native binary (SEA) for linux-x64, linux-arm64-glibc, linux-arm64-musl, darwin-*, win32-*. Termux's process.platform === 'android' is not in that list. Even --force-installing the linux-arm64 package fails because the binary needs /lib/ld-linux-aarch64.so.1 or /lib/ld-musl-aarch64.so.1, neither of which exist in Bionic libc.
/tmp is hardcoded. Claude Code writes to /tmp/claude/... for background tasks. Termux doesn't have a writable /tmp. termux-chroot exposes /tmp -> /usr/tmp to all child processes (which proot -b alone does not).

Install

If you just want it working, run the top-level installer:

bash install.sh

Otherwise, the manual steps are:

# 1. Pin to the last compatible version
npm install -g @anthropic-ai/claude-code@2.1.112

# 2. Protect against the auto-updater (it can ignore env vars)
chmod -R a-w $PREFIX/lib/node_modules/@anthropic-ai/claude-code/

# 3. Make the wrapper available
cp bin/clauded ~/.local/bin/
chmod +x ~/.local/bin/clauded

Settings

~/.claude/settings.json:

{
  "env": { "DISABLE_AUTOUPDATER": "1" },
  "skipDangerousModePermissionPrompt": true,
  "effortLevel": "xhigh"
}

DISABLE_AUTOUPDATER is also exported from bashrc.snippet. Belt and suspenders — the auto-updater has been observed to ignore the env var in some releases, which is why chmod -R a-w is the real defense.

How `clauded` works

clauded
  └── termux-chroot
        └── claude --dangerously-skip-permissions "$@"

termux-chroot simulates a Linux FHS where /tmp, /etc, /usr etc. point to their Termux equivalents. Crucially, every child process inherits this view, so any background task Claude spawns also sees a working /tmp.

Updating safely

claude-update

This script:

Checks npm for the latest version.
Compares against the ceiling (2.1.112).
Refuses to upgrade past the ceiling.
Reapplies chmod -R a-w after a successful install.

If a future Anthropic release re-supports Android (or restores the pure-Node fallback), bump the ceiling in claude-update and the README.

Authenticating

clauded
# Inside Claude:  /login

Subscription accounts and API keys both work. The OAuth flow opens a URL; long-press to copy it on Android and paste it in a real browser (Chromium, Firefox).

When the wheels come off

See TROUBLESHOOTING.md for:

EACCES: /tmp/claude/...
native binary not installed
claude --version works but clauded errors
Sharp / image support
proot-distro escape hatch (lets you run newer versions inside a real glibc rootfs)

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