# Review by Linus Torvalds (Round 4)

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## Linus Torvalds — Review Round 3

I've reviewed the full diff (390 lines in orchestrator.py, 11 lines in config.py, 922 lines of tests) against the PRD.

**All 10 functional requirements are implemented and verified.**

VERDICT: approve

FINDINGS:
- [tests/test_parallel_config.py]: `test_default_enabled` fails intermittently in full xdist suite — pre-existing test isolation issue, not caused by this branch. Passes in isolation.
- [src/colonyos/orchestrator.py:762-768]: Task description regex is duplicated from the DAG parser — two places that need to agree on task file format. Future landmine if format changes.
- [src/colonyos/orchestrator.py:4007-4028]: Control flow uses early returns inside an if/else with a shared fallback. Correct but slightly convoluted. Minor style nit.
- [src/colonyos/orchestrator.py:896-899]: Two consecutive `if safe_files:` blocks that could be one. Trivial.

SYNTHESIS:
This is the simple, obvious thing done correctly. A DAG, a topological sort, a loop that runs one agent per task and commits between them. No premature abstractions, no clever workarounds. The `_run_sequential_implement` function is ~130 lines and every line does real work. Security is handled properly — selective staging instead of `git add -A`, subprocess timeouts, sanitized commit messages. Failure propagation through the DAG is correct: failed tasks BLOCK dependents, independent tasks continue. 32 tests cover the happy path, failure cascades, security filtering, memory injection, context trimming, and edge cases. The one follow-up worth doing is deduplicating the task description regex from the DAG parser, but it's not blocking. Ship it.
