ThothII/harness/.pi/skills/tht-sessione/modules/disambiguation/schema-grounding.md

3. Value grounding (D14a). If a cited value (e.g. "ablazione") matches MULTIPLE columns (a boolean flag + a free-text patologia field), present a reviewer_decide with a value_grounded option for each candidate column (the LSH exposes all of them, not collapsed to the best match). The reviewer chooses the anchor(s).
4. Concept formula (D14b). If a concept (e.g. "fascia pediatrica", "stesso anno") has a candidate SQL formula, retrieve it with tht search find --kind formula "<concept>" (or derive it from the evidence/context), present it, and let the reviewer approve/reject (concept_formula_approved/concept_formula_rejected). Reflect the approved formula in schema_linking.json (concept_formulas).