Task 3 Report: Expose Authoring Contract Inspection

Status

Implemented Task 3 of the workflow contract graph backend slice.

Changes

Added WorkflowDraftSurface.inspect_draft_authoring_contract and the matching WorkflowApi implementation.
Added read-only persisted workspace loading with canonical revision-conflict precedence and no validation-save or revision mutation.
Projected tolerant workflow input/state/output schemas through the Task 1 inventory projector.
Projected resolved capability input/output schemas, outcomes, descriptions, and executable entry candidates for keyed use steps. Projection ids and __end__ are not advertised as entry candidates.
Integrated Task 2 runtime context analysis for the selected step. Compile or interpretation failures leave scoped context empty and become warnings.
Added the JSON-RPC params model, method dispatch, typed remote client method, nullable selected_step_id, and named OpenRPC payload references.
Preserved existing domain error mapping for unknown steps and missing workspaces, -32602 for malformed RPC params, and the existing revision_conflict result for stale revisions.

Test-First Evidence

The required RED command was run after adding the service tests and before production implementation:

uv run pytest tests/wf_api/test_drafts_service.py -q -k authoring_contract

It failed for the expected missing seam:

4 failed
AttributeError: 'WorkflowApi' object has no attribute
'inspect_draft_authoring_contract'

After implementation, the new authoring-contract service and transport tests passed:

uv run pytest tests/wf_api/test_drafts_service.py tests/wf_transport_rpc_http/test_app.py tests/wf_transport_rpc_http/test_client.py tests/wf_transport_rpc_http/test_openrpc_contract.py -q -k authoring_contract
12 passed

Verification

uv run pytest tests/wf_api/test_drafts_service.py tests/wf_transport_rpc_http/test_app.py tests/wf_transport_rpc_http/test_client.py tests/wf_transport_rpc_http/test_openrpc_contract.py -q -k "not reads_admin_state"
391 passed, 184 warnings

uv run ruff check <touched source and test files>
All checks passed!

uv run ruff format --check <touched source and test files>
10 files already formatted

uv run basedpyright --level error <touched source files>
0 errors, 0 warnings, 0 notes

The exact broad target command also contains the existing test_rpc_workflow_client_reads_admin_state failure: its recorded event lacks the required timestamp_epoch_ms field when serialized as AdminEventPayload. That failure reproduces in isolation and is unrelated to the Task 3 files.

No Serena configuration was modified.

Concerns

The repository's existing admin-event timestamp validation failure prevents the unfiltered four-file target command from being fully green; the full target set passes when that isolated test is excluded.
FastAPI JSON-RPC emits deprecation warnings from the installed fastapi-jsonrpc dependency; no new warning class was introduced.

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