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/capabilities/capability.infotech.hub-core-library.md

@@ -0,0 +1,126 @@
+---
+id: capability.infotech.hub-core-library
+name: Reusable FOS Hub Core Primitives
+summary: Reusable FastAPI, SQLAlchemy, and MCP primitives extracted from the State Hub for use by other
+  FOS (Federation of Services) hubs.
+owner: hub-core
+status: draft
+domain: infotech
+tags:
+- hub
+- fastapi
+- sqlalchemy
+- mcp
+maturity:
+  discovery:
+    current: D2
+    target: D4
+    confidence: medium
+    rationale: 'README documents the extraction boundary from State Hub (CUST-WP-0025) and the first slice:
+      base metadata, domain/repo registry primitives, agent inbox, progress-event/capability-request primitives,
+      service catalog, DoI schemas.'
+  availability:
+    current: A1
+    target: A3
+    confidence: medium
+    rationale: Python package (`hub-core`), pip-installable/importable; already has a `.forgejo/workflows/ci-smoke.yaml`
+      CI check (ahead of most siblings on the Forgejo transition).
+external_evidence:
+  completeness:
+    level: C1
+    confidence: low
+    basis: scope_vs_intent_and_consumer_expectations
+    satisfied_expectations:
+    - SQLAlchemy base metadata/timestamp helpers
+    - domain and managed-repo registry primitives
+    - agent message inbox primitives
+    - progress-event/capability-request primitives
+    - Forgejo Actions CI smoke check
+    broken_expectations: []
+    out_of_scope_expectations: []
+  reliability:
+    level: R1
+    confidence: low
+    basis: consumer_quality_signals
+    known_reliability_risks:
+    - first extraction slice only; hub-specific concepts (topics, workstreams, tasks, decisions, SBOM,
+      token accounting) intentionally excluded so far
+discovery:
+  intent: Let new FOS hubs reuse the generic primitives State Hub already built, without importing State-Hub-specific
+    domain concepts.
+  includes:
+  - SQLAlchemy base metadata/timestamp helpers
+  - domain/repo registry and agent-inbox primitives
+  - progress-event/capability-request primitives with generic JSON context
+  - service catalog and DoI schemas
+  excludes:
+  - 'State-Hub-specific concepts: topics, workstreams, tasks, decisions, SBOM, token accounting'
+  assumptions: []
+  use_cases: []
+  research_memos: []
+availability:
+  current_level: A1
+  target_level: A3
+  current_artifacts:
+  - '`hub-core` Python package'
+  target_artifacts: []
+  consumption_modes:
+  - library import
+relations:
+  depends_on: []
+  supports: []
+  related_to: []
+evidence:
+  documentation:
+  - README.md
+  - the-custodian:docs/hub-core-extraction-boundary.md
+  tests:
+  - tests/
+  - .forgejo/workflows/ci-smoke.yaml
+  consumer_feedback: []
+  bug_reports: []
+  incidents: []
+consumer_guidance:
+  recommended_for:
+  - new FOS hub services wanting shared FastAPI/SQLAlchemy/MCP primitives
+  not_recommended_for:
+  - consumers needing State-Hub-specific domain concepts (not extracted yet)
+  known_limitations:
+  - first extraction slice; boundary still evolving alongside State Hub
+promotion_history: []
+---
+
+# Reusable FOS Hub Core Primitives
+
+## Overview
+
+`hub-core` is being extracted from the standalone State Hub repository (CUST-WP-0025) to give other FOS hubs reusable FastAPI/SQLAlchemy/MCP primitives without pulling in State-Hub-specific domain concepts.
+
+## Assessment notes
+
+### Discovery
+
+README documents the extraction boundary from State Hub (CUST-WP-0025) and the first slice: base metadata, domain/repo registry primitives, agent inbox, progress-event/capability-request primitives, service catalog, DoI schemas.
+
+### Availability
+
+Python package (`hub-core`), pip-installable/importable; already has a `.forgejo/workflows/ci-smoke.yaml` CI check (ahead of most siblings on the Forgejo transition).
+
+### 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 +1,20 @@
 version: 1
-updated: '2026-06-16'
+updated: '2026-07-06'
 domain: inter_hub
-capabilities: []
+capabilities:
+- id: capability.infotech.hub-core-library
+  name: Reusable FOS Hub Core Primitives
+  summary: Reusable FastAPI, SQLAlchemy, and MCP primitives extracted from the State Hub for use by other
+    FOS (Federation of Services) hubs.
+  vector: D2 / A1 / C1 / R1
+  domain: infotech
+  status: draft
+  owner: hub-core
+  path: registry/capabilities/capability.infotech.hub-core-library.md
+  tags:
+  - hub
+  - fastapi
+  - sqlalchemy
+  - mcp
+  consumption_modes:
+  - library import