implement ops hub extension contract

Assistant: codex
Assistant-Model: gpt-5.6-sol
Assistant-Session: 01a053ff-1d6f-7fe2-ac1c-a6eb40a42a0c

registry/indexes/capabilities.yaml

@@ -1,4 +1,20 @@
 version: 1
-updated: '2026-06-16'
+updated: '2026-08-31'
 domain: helix_forge
-capabilities: []
+capabilities:
+- id: capability.operations.ops-hub
+  name: Operations Hub Extension Contract
+  summary: Versioned hub-extension package and bootstrap client for operational truth, service-catalog records, readiness evidence, and migration gates.
+  vector: D3 / A1 / C1 / R1
+  domain: operations
+  status: reviewed
+  owner: ops-hub
+  path: registry/capabilities/capability.operations.ops-hub.md
+  tags:
+  - operations
+  - service-catalog
+  - readiness
+  - hub-extension
+  consumption_modes:
+  - contract package
+  - command-line bootstrap