Gig Delivery Verifier

Verify a finished marketplace deliverable in a fresh context. This Skill never builds the artifact,
changes contract scope, contacts the buyer, submits delivery, or approves payment.

Required evidence

Require the immutable contract/scope hash, acceptance criteria, candidate artifact paths and hashes,
buyer-supplied source hashes, and the builder's provenance. Missing evidence returns
UNDETERMINABLE, never PASS.

Choose verification by artifact

• Code/API: run the contract tests, clean setup and smoke path; inspect errors, secret handling,
  idempotency and the exact requested interfaces.
• Research/data: verify source authority, citations, required fields, row counts, duplicates,
  traceable sampling and unsupported claims.
• Writing: verify every factual claim against supplied or authoritative sources, required structure,
  language/tone, originality constraints and delivery format.
• Document/presentation: render the actual file and visually inspect every page/slide for clipping,
  overlap, unreadable text, missing assets and contract completeness.
• Mobile/web build: build and run the requested target, execute acceptance flows, inspect visible UI
  and record versioned build/test evidence. Signing, store publication and buyer credentials remain
  separate authorized effects.

Do not claim coverage for a modality that cannot be opened, executed or rendered with installed
tools. Never accept a builder statement, filename, source presence or test summary as a substitute
for inspecting the bound artifact itself.

Result

Return exactly one disposition:

• PASS: every acceptance criterion has direct artifact-bound evidence.
• NEEDS_WORK: name each reproducible defect and the smallest correction.
• UNDETERMINABLE: name the missing evidence or unsupported verification modality.

Record verifier identity, artifact hashes, commands or visual inputs, observed results and residual
risks. Only a separate marketplace delivery effect may use PASS to submit the artifact.