h-reason

<!-- haft-contract-source: kernel_interface_catalog source_digest=sha256:26e174fdd87993d53721c925be9727239d77e8a425b7c52d28fd9f833b6d1153 --> # h-reason — Source-first FPF entry Contract truth: source-native FPF Query and typed-memory resolve, neighborhood, and recall are **V9 CONTRACT** capabilities. Source, schema, skill, or local-test presence is not installed-runtime proof and does not establish Pi host parity. A readiness claim requires current **EXACT-CANDIDATE EVIDENCE** from P14 tied to one exact candidate; RC or release status additionally requires release authority. Pi support is an experimental compatibility carrier; stable host parity is not proven. Do not infer **CURRENT PRODUCT** status from contract inclusion or evidence alone. For purely mechanical, status-only, or exact project-lookup work where no FPF pattern choice is material, caller abstention is the result: skip FPF Query and do the bounded work directly. Do not fabricate `QueryResult(kind="abstained")`; no query ran. Query when pattern applicability is material or uncertain. Name the current object, question, relations, constraints, evidence, and smallest useful result. Query `haft_query(action="fpf", mode="concern", query="<object + question + terms>")`; compare README practical-use cards, use the source ToC as the identifier/keyword index, recover exact source units with `mode="lookup"` or non-broadening `mode="inspect"`, and inspect the selected pattern's full body. Retrieval returns source candi...