Greptile Summary

This PR tightens scenario 006 validation (replication lag + CPU red herring) by refining required_keywords, adding a forbidden_phrases list in answer.yml, updating the LLM prompt to explicitly classify CPU as a red herring, and adding QA_VALIDATION.md. The prompt change and keyword additions look correct, but the new forbidden_phrases key is not wired into the evaluation pipeline and will be silently ignored at runtime.

• forbidden_phrases in answer.yml is never parsed or checked: ScenarioAnswerKey, AnswerKeySchema, _parse_answer_yaml(), and run_suite.py's evaluator all have no knowledge of this field. The intended failure modes (\"two root causes\", \"contributing cause\", etc.) are unenforced. The existing forbidden_keywords field is the wired-up equivalent and should be used instead (or forbidden_phrases must be added to all four touch-points).

Confidence Score: 4/5

Safe to merge once forbidden_phrases is replaced with (or wired to) forbidden_keywords; the prompt improvement is solid.

One P1 finding: the PR's stated goal of failing incorrect multi-root-cause reasoning is not actually enforced because forbidden_phrases is silently ignored. The fix is straightforward (rename to forbidden_keywords or add the field to the data pipeline), but until it's in place the new validation rules are entirely dead code.

answer.yml (forbidden_phrases not enforced), and the four support files that need updating if a new field is introduced: schemas.py, scenario_loader.py, run_suite.py.

Important Files Changed

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[run_suite.py evaluator] --> B{Check required_keywords}
    B -->|pass| C{Check forbidden_categories}
    C -->|pass| D{Check forbidden_keywords}
    D -->|pass| E[PASS]
    B -->|fail| F[FAIL: missing keywords]
    C -->|fail| G[FAIL: forbidden category]
    D -->|fail| H[FAIL: forbidden keyword found]

    subgraph answer_yml["answer.yml (006)"]
        K[required_keywords ✅ enforced]
        L[forbidden_categories ✅ enforced]
        M[forbidden_phrases ❌ silently ignored]
        N[forbidden_keywords — field exists but unused in 006]
    end

    K -.-> B
    L -.-> C
    M -. never parsed .-> X((dead code))
    N -.-> D

_{Reviews (1): Last reviewed commit: "synthetic: tighten validation for replic..." | Re-trigger Greptile}

BEFORE

AFTER

@cerencamkiran pls fix the conflicts!

Conflicts are fixed now @muddlebee👍

🧑‍💻 @cerencamkiran has entered the contributor hall of fame. Merged. Done. Shipped. Go touch grass (then come back with another PR). 🌱

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contributor hall of fame.

congrats 😆