---
model: openai/gpt-5.6-sol
service: opencode
timestamp: 2026-08-19T23:48:23Z
git_ref: 557065d8
diff_cmd: git diff HEAD~1..HEAD
---

Diagnose and fix the stale debugger and reaper assertions failing PR
#481's Unix CI jobs.

> `git diff HEAD~1..HEAD -- tests/devx/test_debugger.py tests/devx/test_tooling.py`

Replace the old T-800 backend-log requirement with the new bounded
cancel-ack escalation evidence. Prove debugger teardown with EOF and a
dead child process instead of requiring optional `KeyboardInterrupt`
text. Accumulate all pexpect prompt chunks for nested error propagation
so expected tracebacks are not lost when `child.before` advances.

Verification:

- exact failed debugger/reaper nodes: `4 passed`
- debugger/tooling TCP: `39 passed, 6 skipped`
- debugger/tooling UDS: `39 passed, 6 skipped`
- full TCP suite: `478 passed, 9 skipped, 7 xfailed, 3 xpassed`
- full UDS rerun: `476 passed, 11 skipped, 8 xfailed, 2 xpassed`