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# Hub-extension conformance
`hub_core.conformance` is the reusable Tier 2/3 harness scaffold for contract
version 0.1.0. It drives only public HTTP ports, so a FastAPI `TestClient` , an
`httpx.Client` , or another compatible target can be used without importing the
runtime implementation.
The harness mutates its target. Run it against a disposable instance or a
dedicated test namespace:
```bash
hub-core api --host 127.0.0.1 --port 8010
hub-core conformance --base-url http://127.0.0.1:8010
hub-core conformance --base-url http://127.0.0.1:8010 --json
```
## Implemented profile
| ID | Tier | Automated evidence |
| --- | --- | --- |
| C1 | 2 | Packaged descriptor, manifest, and catalog validate against Draft 2020-12 schemas |
| C3 | 2 | Runtime health probe returns healthy |
| C4 | 2 | Repeated manifest registration is reported as a duplicate |
| C5 | 2 | Cataloged progress/interaction events are accepted; wrong-family and unknown events are rejected |
| C6 | 2 | Contract and scenario fixtures reject secret-shaped keys, credentialed database URLs, and private keys |
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| C7 | 2 | Disabled compatibility groups (`/api/v2/hubs` , `/console` ) deny access without needing fixture credentials |
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| C8 | 2 | Registry response propagates the request correlation identifier |
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| C9 | 2 | `/readyz` reports each dependency (database, `port.repo` projection, workload projection, authorization) individually, only degrading when a configured dependency is unavailable or stale |
| C10 | 2 | A registration whose `contract_version_min` /`contract_version_max` excludes the runtime's contract version is rejected with an explicit incompatibility error |
| C2 | 2 | `GET /ports/registry/registrations/{hub_slug}` resolves missing (404) and ambiguous (two hub_slugs sharing one `reuse_surface_id` ) registrations, and `GET .../audit` returns queryable registration history |
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| F2 | 3 | Progress and interaction fixture events appear only in their respective projections |
| F3 | 3 | Authority fixtures appear in projections with declared rebuild sources and provenance hashes |
The projection scenario is shipped in the wheel as
`fixtures/projection-rebuild.json` . Correlation and time fields are generated
per run, allowing the harness to identify its own evidence without relying on
global row counts.
## Deliberately open checks
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F1 registry audit history at framework scale (beyond the per-`hub_slug` audit
trail above), F4 `/api/v2` consumer smokes, F5 MCP projection binding, F6
policy fail-closed behavior beyond the raw-port group check above, F7
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telemetry rejection, and F8 migration metadata isolation require ports or
absorption slices that are not part of the T04 minimal vertical. Tenant
isolation also remains open because the 0.1 runtime has no tenant identity or
authorization context yet. These gaps must not be interpreted as passing; the
harness reports only the implemented profile above.
