Register shard-wiki capability.wiki.derived-views (planned)

Completes shard-wiki's capability registration (8 wiki.* entries; index 20).
reuse-surface validate: ok. Source: shard-wiki SHARD-WP-0013 T3.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

registry/capabilities/capability.wiki.derived-views.md

@@ -0,0 +1,87 @@
+---
+id: capability.wiki.derived-views
+name: Wiki Derived Views
+summary: Recomputable views over a wiki union — BackLinks, RecentChanges, AllPages, SiteMap, and (delegate-or-derive) Search — carrying provenance.
+owner: shard-wiki
+status: draft
+domain: helix_forge
+tags: [wiki, derived-views, backlinks, recentchanges, search, shard-wiki]
+
+maturity:
+  discovery:
+    current: D3
+    target: D5
+    confidence: medium
+    rationale: >
+      Core-vs-adapter classification and behaviours are decided (FederationRequirements ADR-03);
+      implementation is planned (SHARD-WP-0010), not built.
+  availability:
+    current: A0
+    target: A4
+    confidence: low
+    rationale: >
+      Designed; no implementation yet. Informational/planning reuse only today.
+
+external_evidence:
+  completeness:
+    level: C0
+    name: Absent
+    confidence: low
+    basis: scope_vs_intent_and_consumer_expectations
+    satisfied_expectations: []
+    broken_expectations:
+      - no derived view is implemented yet
+    out_of_scope_expectations:
+      - presentation / rendering of views
+  reliability:
+    level: R0
+    confidence: low
+    basis: consumer_quality_signals
+    known_reliability_risks:
+      - planning-stage
+
+discovery:
+  intent: >
+    Provide recomputable, provenance-carrying views over the union (link graph, change feed,
+    enumeration, search) without introducing canonical state.
+  includes:
+    - BackLinks (link graph), RecentChanges (journal + shard signals), AllPages, SiteMap
+    - Search as delegate-to-native-or-derive-index
+  excludes:
+    - view presentation / UI
+  use_cases:
+    - "shard-wiki UseCaseCatalog UC-17..UC-21, UC-63"
+
+availability:
+  current_level: A0
+  target_level: A4
+  current_artifacts:
+    - "shard-wiki/workplans/SHARD-WP-0010-derived-views.md"
+  consumption_modes:
+    - informational
+
+relations:
+  depends_on:
+    - capability.wiki.shard-orchestration
+    - capability.wiki.page-model
+  related_to:
+    - capability.wiki.engine-typed-extensions
+
+evidence:
+  documentation:
+    - "shard-wiki/spec/FederationRequirements.md (ADR-03)"
+
+consumer_guidance:
+  recommended_for:
+    - planning derived navigation/discovery over a federated wiki union
+  not_recommended_for:
+    - implementation reuse today (planning-stage)
+  known_limitations:
+    - not implemented; Search ranking policy undecided
+---
+
+# Wiki Derived Views
+
+Recomputable views over the union (BackLinks, RecentChanges, AllPages, SiteMap, Search). All
+are derived/disposable (no canonical state) and carry provenance; Search is delegate-to-native
+where a shard's query capability allows, else a derived index. Planned in SHARD-WP-0010.

registry/indexes/capabilities.yaml

@@ -210,3 +210,14 @@ capabilities:
     path: registry/capabilities/capability.wiki.engine-typed-extensions.md
     tags: [wiki, engine, typed-extensions, feature-activation, shard-wiki]
     consumption_modes: [informational]
+
+  - id: capability.wiki.derived-views
+    name: Wiki Derived Views
+    summary: Recomputable views over a wiki union — BackLinks, RecentChanges, AllPages, SiteMap, and (delegate-or-derive) Search — carrying provenance.
+    vector: D3 / A0 / C0 / R0
+    domain: helix_forge
+    status: draft
+    owner: shard-wiki
+    path: registry/capabilities/capability.wiki.derived-views.md
+    tags: [wiki, derived-views, backlinks, recentchanges, search, shard-wiki]
+    consumption_modes: [informational]