Deterministically check a single answer against the context it should be grounded in: required facts (anchors) present, every number traceable to the context, abstention when the question is unanswerable. Same logic as the CI gate — no model, no network. Returns pass/fail with named issues.

Deterministically check a structured extraction against its hand-labelled gold record: schema validity (nullable fields are the abstention contract), field accuracy with per-field normalisers (dates → ISO, money → minor units) and aliases, and fabrication — a non-null value in a field whose gold is null (a guessed date of birth the document never stated). Same logic as the CI gate — no model, no network. Returns pass/fail with named issues and a per-field verdict.

Run groundwork check in a repo that has a scaffolded harness: redaction self-test, then the archetype's eval (grounding for document-qa, extraction for extraction) against the repo's own gold set. Returns the exit code, the main scorer's metrics, and any named failures — exactly what CI would report.

Run groundwork init [archetype] in a repo: writes the adapter boundary, redaction config, gold-set templates, GitHub Action, and playbook for a deployment pattern — document-qa (documents → grounded answers) or extraction (documents → structured fields). Never overwrites existing files. After scaffolding, the human wires groundwork/adapter.mjs and replaces the example gold cases with real ones.

Run groundwork cost in a repo: measured token usage from eval runs, with savings recommendations in leverage order (prompt caching, batching, context trimming, model routing last).