Targeted cleanup: DDXPlus pilot manifest (12-item update)

[gradient-pulse]

Motivation

• Address high-value, low-risk manifest issues identified in the pilot adjudication, namely blank or generic tagging_rationale fields, a few implausible distractors, and weak/opaque stems, while keeping edits narrow and manifest-level only.

Description

• Filled previously-blank tagging_rationale fields for 10 high-priority items and clarified stem wording for 12 targeted items to present them as coded-evidence vignettes without changing diagnosis intent.
• Replaced clearly implausible distractors in 2 items: pilot_ddxplus_0037 (updated option set to more plausible cardiothoracic/trauma alternatives) and pilot_ddxplus_0047 (replaced an implausible pediatric cardiac distractor with Viral pharyngitis).
• Changes were limited to benchmarks/ai_intuition_c08/second_benchmark_pilot/pilot_manifest_draft.json and the single summary note benchmarks/ai_intuition_c08/second_benchmark_pilot/pilot_cleanup_pass_note.md and avoided any benchmark code or ingestion logic edits.

Testing

• Validated the manifest is well-formed JSON by loading with json.loads(...) and confirming parse success and no blank tagging_rationale entries remain (check passed).
• Performed an item-level diff check against the prior manifest snapshot which confirmed 12 touched items (check passed).
• Verified the working tree contained only the intended files (pilot_manifest_draft.json and pilot_cleanup_pass_note.md) before finalizing edits (check passed).
• Created the single cleanup note at benchmarks/ai_intuition_c08/second_benchmark_pilot/pilot_cleanup_pass_note.md documenting what changed, how many items were touched, what was left unchanged, and readiness for the first ablation run (note added successfully).

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Codex Task