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plan_work_graph(): real `claude --agent <org_node> -p` call, produces a graph_manifest (4 nodes for brd/prd/sdd/benchmark, dependency-chained sdd->prd->brd, each edge tagged zero_token/needs_judgment per 03-C §3.4), recorded as a work_graph_run row (status='planning' -- 04-P p_work_graph_execution start_state). Does not execute the plan or produce real artifacts -- 03-C §3.4 says so explicitly ("不执行，只规划"). Real call surfaced a genuine, undocumented constraint: --json-schema is silently ignored when combined with --agent (structured_output never appears; the identity itself works fine -- the response referenced the migrated SOUL.md's own principle numbering). First attempt at this Unit failed against the real API for exactly this reason. Fixed by asking the model to fence its JSON and parsing it out of `result` instead (_extract_graph_manifest, tolerant of bare JSON / fenced blocks / an extra wrapper key). Documented centrally in 05-实施约束与依赖.md §5.4.1.1 since this will matter for any future Unit needing agent-identity + structured output together, not just this one. Also corrects the same class of Done-line overreach as U-009/U-010 (development-plan.md claimed U-011 alone satisfies REQ-02's happy case, but c_work_graph_plan's own contract explicitly excludes execution) and flags a real, previously-invisible gap found while tracing REQ-02's actual dependencies: no Unit in development-plan.md's 43-unit breakdown owns c_artifact_write (03-C §3.7), despite REQ-02's happy AND failure cases both requiring it directly. Not fixed here -- noted for whichever Unit (U-012/ U-013, most likely) needs it first. 15 new mocked stdlib unittest cases + 1 gated real test (re-run and passing after the --json-schema fix). 98 total mocked tests across U-001-011, all passing. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
