Golden-Path Conformance Guard (addendum)
The FR-40..FR-42 addendum — blessed-trajectory projections and plan/progress
conformance under gp-grammar/1 — lives at the repository root:
Status: BUILT (first cut), behind the golden-path Cargo feature. The code
is src/goldenpath/; the surfaces are yupana_path_check over MCP and
POST /path/check on the daemon, both feature-gated. The operational reference
is Golden-Path Conformance.
Two choices the implementation made that the design left open, since they change how the guard is used:
- Projected paths are supplied per call, like
StatePolicy, rather than held resident — a stale resident copy would enforce yesterday's blessing. - Deviation is decidable only against a complete plan, so FR-41's per-action flow reports progress and hazards rather than hard deviations.