Development record

2026-08-16 — the multi-harness routing ADOPTED at maintainer confirmation (itd-84 hand-run graded into the decomposition-calibration note, entry 3): adr-39 filed — the host-tier policy (MCP front door as the universal floor; the current plugin host's integration as the reference implementation, the assumed SOTA surface for the time being; the shipping default ultimately an open-source harness, flipping only on the parity suite plus a deliberate maintainer act; adaptor ladder most-native-first; per-host adoption one intent each at an explicit decision, nameless until adopted). itd-22 renamed `harness-portability` (id unchanged) and reworked to carry the shared machinery only — host profile seam, ladder semantics, parity conformance suite — with a retire-the-name ban (`retired-itd-22-slug`) on the old slug. itd-113 minted: the MCP front door intent (the floor is the first build). The never-double-write stance routed into adr-39 rather than a new principle — it restates one-canonical-primitive at the host boundary.