[jonahgabriel]

Summary

Implements Plan B2 (docs/plans/2026-06-08-close-the-loop-plan.md, §Phase B) — MCP exposure of the generated COMPUTE node from the SEA self-extension loop.

ServiceMCPToolSync previously exposed an MCP tool only for events tagged mcp-enabled + node-type:orchestrator (_is_mcp_orchestrator), so generated COMPUTE nodes could never surface as MCP tools. This PR relaxes the rule via a renamed predicate _is_mcp_exposable(tags):

• mcp-enabled + node-type:orchestrator → exposed (unchanged)
• mcp-enabled + node-type:compute + generated → exposed (new)
• mcp-enabled + node-type:compute WITHOUT generated → NOT exposed
• missing mcp-enabled → NOT exposed (any type)

Generated compute nodes are NOT relabeled as orchestrators: tool description and metadata.node_kind distinguish 'generated compute node' from 'orchestrator', and only generated compute nodes surface (hand-authored compute nodes do not leak into the registry).

This is the infra-side classification change only (off the critical path per the plan). The live-runtime 'MCP tool appears' assertion is Phase D (D1/D2), not claimed here.

Changes

• src/omnibase_infra/services/mcp/service_mcp_tool_sync.py — predicate relaxed; TAG_NODE_TYPE_COMPUTE + TAG_GENERATED constants; type-aware tool description + node_kind metadata.
• tests/unit/services/mcp/test_service_mcp_tool_sync_exposure.py — new TDD unit tests (orchestrator + generated compute exposed; non-generated compute, non-mcp, empty excluded).
• contracts/OMN-12827.yaml — evidence contract.

dod_evidence (OMN-12827)

• TDD red→green observed (red: AttributeError: ... _is_mcp_exposable).
• uv run pytest tests/unit/services/mcp/test_service_mcp_tool_sync_exposure.py -v → 6 passed.
• uv run pytest tests/unit/services/mcp/ tests/integration/services/mcp/ -q → 132 passed, 25 skipped (kafka-gated).
• uv run mypy src/omnibase_infra/services/mcp/service_mcp_tool_sync.py --strict → clean.
• uv run ruff check src/ tests/ → All checks passed; pre-commit run --files <changed> → clean.
• Full tests/unit/ → 20160 passed, 1 pre-existing unrelated failure (migration vendor-sync; reproduces on pristine main, caused by uncommitted sibling omnimarket migrations in the shared local clone; not touched by B2).

Paired OCC receipt: OmniNode-ai/onex_change_control#2352

Evidence-Source: OCC#2352
Evidence-Ticket: OMN-12827

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 0d9e9b9a-dbeb-4a56-b911-c2d9a2a6490f

📥 Commits

Reviewing files that changed from the base of the PR and between abf092d and 000087f.

📒 Files selected for processing (5)

• contracts/OMN-12827.yaml
• scripts/ci/detect_test_paths.py
• src/omnibase_infra/services/mcp/service_mcp_tool_sync.py
• tests/unit/scripts/ci/test_detect_test_paths.py
• tests/unit/services/mcp/test_service_mcp_tool_sync_exposure.py

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch jonah/omn-12827-mcp-expose-generated-compute

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