Summary

Subagent processes can outlive a crashed parent.

Acceptance criteria

• Subagent processes get SIGTERM via Drop.
• On Linux use prctl(PR_SET_PDEATHSIG).
• On macOS/Windows use a watchdog.

Files

crates/tui/src/tools/subagent/

Size

S

Source

Source tag: PRIOR. Add exact upstream/opencode source links during implementation if they are not already known. Do not copy external code blindly; port the behavior into this repo's architecture.

Filed from 2026-05-02 v0.8.8 intake.