Draft capability entry (reuse-surface REUSE-WP-0017-T04, cohort 3)

Honest first-pass maturity vector grounded in README/docs/tests present
in this repo; no invented evidence. Flagged for human review before
publish. See reuse-surface history/2026-07-06-coverage-classification.md.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

registry/indexes/capabilities.yaml

@@ -1,4 +1,22 @@
 version: 1
-updated: '2026-06-16'
+updated: '2026-07-06'
 domain: helix_forge
-capabilities: []
+capabilities:
+- id: capability.railiance.fabric-graph
+  name: Railiance Fabric Ecosystem Graph
+  summary: 'Models the durable infrastructure-responsibility graph of the Railiance netkingdom: schemas,
+    discovery tools, registry services, graph queries, and State Hub export contracts for services, machines,
+    repos, deployables, endpoints, ownership, dependencies, and bindings.'
+  vector: D3 / A1 / C1 / R0
+  domain: financials
+  status: draft
+  owner: railiance-fabric
+  path: registry/capabilities/capability.railiance.fabric-graph.md
+  tags:
+  - railiance
+  - graph
+  - ownership
+  - discovery
+  consumption_modes:
+  - library import
+  - cli (validation)