plat 016

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PLAT-016 — evaluation report serialization drops a real zero score

Coordination	Value
Assigned agent	Codex
Ticket state	runtime_reverify
Last synchronized	2026-08-04

Claim this ticket in this file before implementation. During active work, update this fragment rather than the shared index; synchronize the index once at handoff, review, or completion.

• Priority: P1
• Owner: evaluation result/report serializer
• Source finding: HARNESS-EVAL-REPORT-ZERO-SCORE
• Source database: Workflow/social-media/db/db.sqlite
• Recorded state: external_action_required
• Problem: a real numeric score of 0 is treated like an absent value and omitted from evaluation_report.json.
• Impact: the worst valid evaluation result can disappear, making reports, trend calculations, and Pulse evidence falsely incomplete or healthier than the producing evaluator actually reported.
• Implementation: workflow and server report projections serialize Score without omitempty; score_captured distinguishes a real zero from a missing score. Score/MaxScore use float64, so a valid 7.5 is no longer truncated to 7. SQLite persists the captured bit, and the evaluation UI renders only captured values as score badges. The server keeps this bit nullable so a historical report where it did not exist is not rewritten as explicit false and hidden by the UI.
• Verification (2026-08-04): focused Go tests cover missing, skipped, real zero, and fractional extraction plus JSON/SQLite/API projection. Frontend tests cover new and legacy reports and prove 0/10 and 7.5/10 display while missing/skipped scores remain hidden. TypeScript compilation passes.
• Regression tests: TestExtractEvalVerdictPreservesFractionalScore, TestEvaluationStepScoreSerializesGenuineZeroScore, TestEvaluationReportAPIProjectionPreservesZeroAndFractionalScores, and the frontend evaluationReport.test.ts suite.
• Current state: implementation fixed; runtime reverify remains.
• Acceptance: table-driven serialization covers 0, positive, negative, fractional, null, unavailable, and missing values. Numeric zero survives unchanged through persisted result, report JSON, API projection, and UI.