Summary

On macOS (Apple Silicon), ralph-tui run --sandbox --agent opencode fails immediately with “Unknown error.” The agent never produces RAW OUTPUT and tasks are skipped instantly. Running without sandbox works.

Environment

• macOS (Apple Silicon)
• ralph-tui: latest (installed via bun)
• opencode: 1.1.25 installed via Homebrew at /opt/homebrew/bin/opencode

Repro Steps

1. Ensure opencode is installed via Homebrew at /opt/homebrew/bin/opencode.
2. Run:

   ralph-tui run --prd <file>.json --auto-next --sandbox --agent opencode --headless

3. Observe failure: tasks are skipped with “Unknown error” and RAW OUTPUT is empty.

Expected

Opencode should run under sandbox-exec and produce normal task output.

Actual

• Iterations fail immediately with “Unknown error”
• RAW OUTPUT empty in .ralph-tui/iterations/*.log
• Running without sandbox (--no-sandbox) works and the agent executes tasks

Notes / Investigation

• ralph-tui generates a Seatbelt profile with (allow process-exec) and read-only access to system dirs; custom readOnlyPaths are added as file-read* subpaths only.
• Adding /opt/homebrew to readOnlyPaths and opencode dirs to allowPaths did not resolve it.
• Direct sandbox-exec attempts to run /opt/homebrew/bin/opencode with a permissive profile still abort with exit code 134 (no stderr).

If helpful I can provide full logs and the generated sandbox profile string.