feat: define accountability root manifest

workplans/RAIL-FAB-WP-0018-accountability-root-discovery-update-loop.md

@@ -4,7 +4,7 @@ type: workplan
 title: "Accountability Root Discovery And Update Loop"
 domain: railiance
 repo: railiance-fabric
-status: ready
+status: active
 owner: codex
 topic_slug: railiance
 created: "2026-05-23"
@@ -39,7 +39,7 @@ interfaces, or cross-boundary utility.
 
 ```task
 id: RAIL-FAB-WP-0018-T01
-status: todo
+status: done
 priority: high
 state_hub_task_id: "38ae49fb-ce21-489c-ba67-7f76ab4febc9"
 ```
@@ -65,6 +65,23 @@ Done when:
 - the format can add future tenant subfabrics without changing the top-level
   fabric criterion.
 
+Result:
+
+- Added `schemas/accountability-root-manifest.schema.yaml` for
+  `railiance.fabric/v1alpha2` accountability-root manifests.
+- Added `fabric/discovery/railiance-accountability-roots.yaml` to represent
+  the current Railiance one-fabric baseline, State Hub/Gitea/repo/host roots,
+  deployment automation roots, and safe metadata-only secret/backup roots.
+- Added `examples/discovery/accountability-root-manifest.yaml` to show how a
+  tenant subfabric can be added without changing the parent fabric criterion.
+- Added `docs/accountability-root-manifest.md` and linked the manifest from the
+  financial Fabric operator guide.
+- Added schema/baseline coverage in `tests/test_accountability_roots.py`.
+- Verified with `python3 -m pytest tests/test_accountability_roots.py -q`,
+  `python3 -m railiance_fabric.cli validate .`,
+  `python3 -m railiance_fabric.cli export --format financial .`, and full
+  `python3 -m pytest`.
+
 ## T02 - Implement Durable Evidence Discovery Adapters
 
 ```task
@@ -210,4 +227,3 @@ Done when:
   and cross-boundary utility changes.
 - Live telemetry remains out of scope.
 - The current Railiance baseline can be rebuilt from scratch and exported.
-