Greptile Summary

This PR splits staleGatewayPids (diagnostics) from verifiedStaleGatewayPids (gateway-classified, actionable) on GatewayRestartSnapshot, and gates all kill/retry logic on the verified set. This prevents a spurious third service.restart() on Windows when the only stale entry comes from the unknown-listener fallback heuristic rather than a confirmed gateway process. The stopped-free timing test is also pinned to Linux so elapsed-time assertions stay deterministic on Windows hosts.

Confidence Score: 5/5

• Safe to merge; the split is additive and backward-compatible, the fix is well-targeted, and all affected call sites are updated.
• All remaining findings are P2 or below. The logic change is narrow, test coverage directly exercises the Windows-specific regression scenario, and the stopped-free timing fix resolves a pre-existing test instability on Windows hosts.
• No files require special attention.

_{Reviews (1): Last reviewed commit: "Gateway: avoid spurious restart on Windo..." | Re-trigger Greptile}

Rebase onto main — conflicts resolved

Conflict: src/cli/daemon-cli/restart-health.test.ts (first commit vs main).

Cause: main added waitForStoppedFreeGatewayRestart() so non-Windows uses shared attempt logic; our branch still inlined waitForGatewayHealthyRestart with platform pinned to linux.

Resolution: Keep the helper from main and keep pinning process.platform to linux before the call so elapsed/sleep expectations stay stable on Windows hosts (same intent as the original PR).

Follow-up: lifecycle.test.ts — fails restart when gateway remains unhealthy after the full timeout expected 60s, but on Windows postRestartHealthAttempts() uses the longer Windows window (180s in the message). Pinned platform to linux in that test so the assertion matches Linux/CI (same pattern as the test above it).

Verification: pnpm test on src/cli/daemon-cli/restart-health.test.ts, lifecycle.test.ts, and filtered update-cli tests for the new restart follow-up cases — all passed.

Branch force-pushed: 49367ed925 (3 commits: 2 original + 1 test fix).