OCI Skill Registry — Core Connector (issue 9 of 29)

Labels: ready-to-code
Depends on: Issue 1 (#4039 shared infra), Issue 8 (#TBD SDK)
RHIDP Stories: RHIDP-15296
Feature: RHDHPLAN-1507 — Epic RHIDP-15294

Implement the core OCI Skill Registry connector: OCI Distribution Spec client for tag listing, manifest fetching, and blob download; skillcard extraction from OCI image layers with YAML parsing and SDK schema validation; entity emission as kind: AIResource with spec.type: skill and all required annotations; backend module registration with createBackendModule. This is the foundational OCI connector — multi-registry config, incremental sync, and load testing are separate issues.

Tasks

From openspec/changes/oci-skill-registry/tasks.md group 1 (RHIDP-15296):

• 1.1 Evaluate and select Node.js OCI Distribution Spec client library
• 1.2 Implement OciRegistryClient class with methods: listTags(), getManifest(), getBlob()
• 1.5 Write unit tests for OCI client with mocked registry responses

From openspec/changes/oci-skill-registry/tasks.md group 2 (RHIDP-15296):

• 2.1 Implement layer blob download with streaming decompression
• 2.2 Implement tar stream parser to extract skillcard.yaml
• 2.3 Integrate SDK schema validator for skillcard.yaml validation
• 2.4 Implement error handling for missing/invalid skillcard.yaml
• 2.5–2.6 Unit tests for skillcard extraction and schema validation

From openspec/changes/oci-skill-registry/tasks.md group 3 (RHIDP-15296):

• 3.1 Implement OciSkillRegistryProvider class extending EntityProvider interface
• 3.2 Implement entity factory: convert skillcard.yaml to Backstage AIResource entity
• 3.3 Populate required annotations: rhdh.io/ai-asset-category, rhdh.io/ai-asset-version, rhdh.io/ai-asset-source
• 3.4 Implement entity ref sanitization
• 3.5 Write unit tests for entity emission

From openspec/changes/oci-skill-registry/tasks.md group 6 (RHIDP-15296):

• 6.1 Implement backend module with createBackendModule({ pluginId: 'catalog', moduleId: 'ai-catalog-oci-skill-registry' })
• 6.2 Register entity provider via catalogProcessingExtensionPoint
• 6.4 Write integration test for module registration

From openspec/changes/oci-skill-connector/tasks.md group 1 (RHIDP-15324):

• 1.1–1.11 OCI registry client: tag listing, manifest fetching, Docker v2 fallback, digest extraction, pagination, namespace filtering, parallel manifest fetch, OCI annotations, blob download, gzip decompression, unit tests

From openspec/changes/oci-skill-connector/tasks.md group 2 (RHIDP-15325):

• 2.1–2.15 Skillcard parsing: layer identification, YAML parsing, Zod validation, error logging, entity building as kind: AIResource, annotation population, default values, invalid skill rejection, aggregate summary, unit tests

Specifications

• openspec/changes/oci-skill-registry/specs/oci-artifact-ingestion/spec.md
• openspec/changes/oci-skill-connector/specs/registry-discovery/spec.md
• openspec/changes/oci-skill-connector/specs/skillcard-parsing/spec.md

Read the two named OpenSpec change task files and the oci-artifact-ingestion, registry-discovery, and skillcard-parsing specifications first. Use the requested mocked OCI-client, skillcard extraction, entity-emission, and module-registration tests to verify completion; done means the connector downloads and validates skillcards, emits annotated AIResource entities, and registers through the catalog backend module.