# Review by Andrej Karpathy (Round 1)

Here is my review as Andrej Karpathy:

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VERDICT: approve

FINDINGS:
- [src/colonyos/show.py]: The data/render separation is clean and well-executed — the entire data layer is pure functions over dicts returning dataclasses. This is exactly the right architecture. `--json` becomes trivial (just `json.dumps` the raw dict), and `--phase` filter is a simple list comprehension. No fighting against the structure.
- [src/colonyos/show.py]: `resolve_run_id` uses substring matching (`partial_id in run_id`) which is a good UX choice — means both prefix and hash-suffix lookups work without the user needing to know which part they're typing. The `startswith` check on line 129 is technically redundant with the `in` check on 132, but it's harmless and makes intent clear.
- [src/colonyos/show.py]: `collapse_phase_timeline` is the hardest logic here and it's correctly implemented as a pure function with clear round-tracking semantics. The test coverage on this (7 cases including edge cases like single review, failure propagation) is appropriate.
- [src/colonyos/show.py]: Minor nit — `_compute_wall_clock_ms` silently returns 0 on parse errors. This is fine for a display-only command, but worth noting that malformed timestamps will produce "0s" duration without any warning. Acceptable tradeoff.
- [src/colonyos/cli.py]: The CLI wiring is clean — lazy imports inside the command body, proper error handling with `SystemExit(1)` for all three failure modes (not found, invalid input, ambiguous). The `--json` path correctly outputs to stdout while Rich output goes to stderr-backed Console. Good.
- [tests/test_show.py]: 51 tests covering data layer exhaustively and render layer with smoke tests. The test helper pattern (`_make_run`, `_make_phase`, `_capture_console`) is reusable and clean. No test is testing implementation details — they all test behavior. This is the right level of rigor.
- [tests/test_cli.py]: CLI integration tests cover the key paths: full ID, prefix, bad ID, ambiguous, `--json`, `--phase`. The `--json` test actually parses the output as JSON which is the right assertion.
- [src/colonyos/show.py]: The prompt truncation (120 chars in rich view, full in `--json`) is the correct decision. Prompts are programs — in the rich view you want a quick signal, in JSON you want the full thing for programmatic use.

SYNTHESIS:
This is a well-architected, well-tested feature that follows the established patterns in the codebase. The key design decisions are all correct: data/render separation makes `--json` trivial, review phase collapsing is a pure function that's independently testable, and the CLI error handling covers all the edge cases. The code treats the run log as structured data rather than just dumping JSON, which is the right level of abstraction for a triage tool. The test coverage is thorough — 51 tests in 0.06s, covering data layer exhaustively and render layer with appropriate smoke tests. No TODOs, no hacks, no unnecessary complexity. The only thing I'd flag for a future iteration is that the `--phase` filter could benefit from fuzzy matching (e.g., `--phase rev` matching `review`), but that's a nice-to-have, not a blocker. Ship it.