claim-evidence plugins

by Ahmad Ammar

Claude adapter for the harness-ledger contract and append-only run ledger. Mints controller run ids and actor instances, renders research answers into claim-evidence records with per-claim sources and [unsourced] tagging, stamps Run-Id commit trailers at commit creation, and enforces a structural generator-is-not-judge separation at append time. The core schema and CLI are provider-neutral; this plugin is one delivery adapter.