Draft capability entry (reuse-surface REUSE-WP-0017-T04, cohort 1)

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 +1,19 @@
 version: 1
-updated: '2026-06-16'
+updated: '2026-07-06'
 domain: helix_forge
-capabilities: []
+capabilities:
+- id: capability.infotech.citation-engine
+  name: Citation Evidence Domain Engine
+  summary: Core domain model and engine services for the citation-evidence ecosystem — shared vocabulary,
+    in-memory repositories, orchestration services, event bus, and citation card renderers.
+  vector: D3 / A1 / C1 / R0
+  domain: infotech
+  status: draft
+  owner: citation-engine
+  path: registry/capabilities/capability.infotech.citation-engine.md
+  tags:
+  - citation
+  - evidence
+  - domain-model
+  consumption_modes:
+  - library import (workspace link)