Why: Both supported tool finish reasons must fail closed when no call was collected; the Dev composition pins that exact Agent-Native revision through Agent-Squad and Backend. Evidence: The function_call regression failed before the fix and passed afterward. Agent-Native, Agent-Squad and Backend full vet/test suites, strict Dev pins, and task-owned PostgreSQL/browser checks passed at their recorded versions. Current Dev HEAD CI and final independent replay remain pending. Impact: Component gitlinks and task evidence only; no paid model call or deployment. Refs: U3 r0.4 review Important 2; Agent-Native PR #46; Agent-Squad PR #53; Backend PR #193
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