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/capabilities/capability.railiance.fabric-graph.md

@@ -0,0 +1,122 @@
+---
+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.'
+owner: railiance-fabric
+status: draft
+domain: financials
+tags:
+- railiance
+- graph
+- ownership
+- discovery
+maturity:
+  discovery:
+    current: D3
+    target: D5
+    confidence: medium
+    rationale: README and SCOPE.md document the ecosystem graph model bounded by financial/operational
+      accountability (who pays, who is accountable), with king/lord/tenant ownership concepts referenced
+      in docs/FabricDiscoveryAndUpdate.md.
+  availability:
+    current: A1
+    target: A3
+    confidence: medium
+    rationale: Python package (`railiance-fabric`) providing a declaration loader and validator; consumed
+      as a library, no hosted service documented yet.
+external_evidence:
+  completeness:
+    level: C1
+    confidence: low
+    basis: scope_vs_intent_and_consumer_expectations
+    satisfied_expectations:
+    - ecosystem graph declaration loader and validator
+    - schemas for services/machines/repos/deployables/endpoints/ownership/dependencies/bindings
+    broken_expectations: []
+    out_of_scope_expectations: []
+  reliability:
+    level: R0
+    confidence: low
+    basis: consumer_quality_signals
+    known_reliability_risks:
+    - discovery/rebuild/update-loop architecture documented as still evolving per docs/FabricDiscoveryAndUpdate.md
+discovery:
+  intent: Let repos declare services, capabilities, interfaces, dependencies, and bindings in source-controlled
+    files, and model the resulting durable infrastructure-responsibility graph across the Railiance ecosystem.
+  includes:
+  - ecosystem graph schema and declaration loader/validator
+  - State Hub export contracts for the graph
+  excludes:
+  - actual infrastructure provisioning (see railiance-infra, railiance-cluster)
+  assumptions: []
+  use_cases: []
+  research_memos: []
+availability:
+  current_level: A1
+  target_level: A3
+  current_artifacts:
+  - Python package (`railiance-fabric`)
+  target_artifacts: []
+  consumption_modes:
+  - library import
+  - cli (validation)
+relations:
+  depends_on: []
+  supports: []
+  related_to: []
+evidence:
+  documentation:
+  - README.md
+  - SCOPE.md
+  - docs/FabricDiscoveryAndUpdate.md
+  tests:
+  - tests/
+  consumer_feedback: []
+  bug_reports: []
+  incidents: []
+consumer_guidance:
+  recommended_for:
+  - Railiance repos wanting to declare their place in the ecosystem ownership/dependency graph
+  not_recommended_for:
+  - needs for actual infrastructure provisioning (see railiance-infra/-cluster)
+  known_limitations:
+  - discovery/rebuild/update-loop architecture still evolving
+promotion_history: []
+---
+
+# Railiance Fabric Ecosystem Graph
+
+## Overview
+
+`railiance-fabric` models the durable infrastructure-responsibility graph of the Railiance netkingdom — who pays for infrastructure, who is accountable for it, and which durable interfaces create value across boundaries — via schemas, a declaration loader/validator, and State Hub export contracts.
+
+## Assessment notes
+
+### Discovery
+
+README and SCOPE.md document the ecosystem graph model bounded by financial/operational accountability (who pays, who is accountable), with king/lord/tenant ownership concepts referenced in docs/FabricDiscoveryAndUpdate.md.
+
+### Availability
+
+Python package (`railiance-fabric`) providing a declaration loader and validator; consumed as a library, no hosted service documented yet.
+
+### Completeness
+
+First-pass honest assessment from the REUSE-WP-0017 coverage campaign
+(reuse-surface). No external consumer feedback exists yet; levels reflect
+scope-vs-intent documentation quality, not internal code quality.
+
+### Reliability
+
+No production consumer telemetry exists yet; reliability level is
+intentionally conservative pending REUSE-WP-0019 reuse-telemetry evidence.
+
+## Promotion checklist
+
+- [x] ID follows `capability.<domain>.<name>` pattern
+- [x] Maturity enums match `specs/CapabilityMaturityStandard.md`
+- [x] `external_evidence` is populated separately from `maturity`
+- [ ] Relations reference valid capability IDs (none yet)
+- [x] Index entry added in `registry/indexes/capabilities.yaml`

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)