#19665 headless server behavior proof Local final implementation head: f4acf04de6e51fd7f439c7b05c0792f2306acc39 Fresh tests agent: original merged PoC 88 passed, 1 failed. Failure: manual parent settlement with automatic settlement disabled produced [] child commands after event delivery and worker drain. Production reverted to main temporarily: 84 passed, 5 failed; production restored byte-for-byte afterward. Implementation after manual-settlement fix: 89 passed. Review regression: 234 mixed settlement/archive/delete events plus child settlement, using real projection state and event stream delivery. Before coalescing: 236 candidate reads. After coalescing: 3 candidate reads; child settled; zero PR branch/summary lookups. Final focused suites: ProjectionSettlement.test.ts, ThreadSettlementService.test.ts, ProjectionStore.test.ts. Real SQL and memory stores cover parent active/settled/archived/deleted/missing candidate filtering. Worker harness covers empty/recent/busy children, retry, pins and opt-outs, manual settlement globally off, and shared/own-worktree cleanup. Dispatch and process boundaries are mocked; this is focused runtime proof, not a live provider subprocess or full app session. No screenshot is applicable to this hidden server-side lifecycle. Native and desktop clients were not launched.