Summary

/claim #18 @algora-pbc /claim #18

Adds a distinct challenge-clarification-parity-guard module for the Scientific Bounty System. This slice protects live challenge fairness by checking whether sponsor Q&A, material clarifications, and attachments are visible to every eligible solver team before evaluation continues.

It covers material answer broadcasts, private attachment advantages, scope-changing clarifications that need amendment consent and deadline extension, sponsor answer SLA misses, anonymous solver identity leaks, overdue material questions, and deterministic clarification-root integrity.

Distinct Scope

This avoids the existing broad bounty marketplace, intake, scoring/arbitration, appeals, workspace privacy, anti-collusion, escrow settlement, payout eligibility, sponsor reliability, amendment-control, reviewer consensus, IP redaction, milestone progress, evidence freeze, rubric readiness, solver prequalification, deliverable acceptance, and reproducibility environment slices already submitted on #18.

Artifacts

• challenge-clarification-parity-guard/reports/challenge-clarification-parity-report.json
• challenge-clarification-parity-guard/reports/challenge-clarification-parity-packet.md
• challenge-clarification-parity-guard/reports/challenge-clarification-parity.svg
• challenge-clarification-parity-guard/reports/demo.mp4

Validation

• node challenge-clarification-parity-guard/test.js -> passed
• node challenge-clarification-parity-guard/demo.js -> generated reviewer artifacts
• node --check challenge-clarification-parity-guard/index.js -> passed
• node --check challenge-clarification-parity-guard/sample-data.js -> passed
• node --check challenge-clarification-parity-guard/test.js -> passed
• node --check challenge-clarification-parity-guard/demo.js -> passed
• git diff --check -> passed
• demo.mp4 decode check with ffmpeg from imageio-ffmpeg -> passed

AI-assisted with OpenAI Codex; reviewed and locally verified before submission.