What problem does it solve? Teams often mark tasks, PRs, or Linear issues as Done based on status fields, stale CI runs, or reviewer prose rather than current evidence. This Skill adversarially challenges those claims, requiring cited proof from code, tests, runtime state, and live task trackers before accepting any completion verdict. ## Core Features & Use Cases - Three verification modes: Quick gate for narrow checks, Standard for normal feature/PR review, and Adversarial mode that auto-escalates for auth/RLS/tenant, HITL, migrations, payments, and production-risk changes. - Evidence-tier protocol: Ranks runtime state, exact-head code, tests/CI, Linear, and docs by authority, resolves conflicts to the higher tier, and requires file/line or command citations for every verdict. - False-green and failure-mode analysis: Builds failure-mode matrices, detects tests that could pass while the real outcome fails, and enforces Mastra/Supabase proof non-substitution rules. - Use Case: Before merging a PR that claims a Supabase RLS fix is Done, run an Adversarial verification to cross-check the diff against live Linear acceptance criteria, replay the migration, and prove cross-tenant denial with cited evidence. ## Quick Start Ask the agent to independently verify whether a specific task or PR is truly Done, requiring cited evidence for every acceptance criterion.