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## Thinking Path > - Paperclip is the open source app people use to manage AI agents for work > - Restart recovery decides when a record owned by a dead server process may be released > - One server process minted three different boot UUIDs, one per module (`controller-process-identity.ts:13`, `native-restart-recovery.ts:284`, `legacy-controller-lease.ts:8`) > - The controller identity also ran `ps -o lstart` on macOS at every native claim, preparation check and lease renewal, which is on the path before `turn.start` > - The durable ownership plan (Phase 1, step 1) needs one process identity before it can add one owner stamp and one prover > - This pull request makes the three modules stamp one boot id and reads the process start time from the OS once > - The benefit is one meaning of "owned by this process" across tables, and no `ps` spawn on the turn path ## Linked Issues or Issue Description Refs #19831 (plan: `doc/plans/2026-11-07-durable-ownership-and-reconciliation.md`, Phase 1). Refs #19846 (Phase 0 inventory, finding 1, and the TTFT baseline row "Controller identity"). **Problem** One process has three boot ids, so the same fact ("this record is owned by this process") has three encodings. The uncached controller identity spawns `ps` on macOS on every claim and renewal. **Expected behavior** One boot id per process. The OS start-time read runs once per process. **Impact** Phase 1 needs one identity to build `OwnerStamp` and `proveOwnerGone` on. The turn path loses one subprocess spawn per claim and renewal. ## What Changed - `controller-process-identity.ts` owns the single process boot id. It adds `currentProcessStartedAtMs()`, which caches a successful OS start-time read for the life of the process and retries a failed read. It also exports `currentProcessSpaceHash()` for the coming prover. - `native-restart-recovery.ts`: `currentNativeControllerIdentity()` and `isCurrentNativeControllerProcess()` use the shared boot id and the cached start time. Its own `randomUUID()` boot id is removed. The fallback to the server-info start time is kept. - `legacy-controller-lease.ts`: `legacyControllerBootId` is now the shared boot id. - Tests in `native-controller-identity.test.ts`: one boot id across native claims, legacy leases and creation intents; one OS read across many claims and renewals; a failed read is retried, not cached. ## Verification - `npx vitest run src/services/native-runtime/native-controller-identity.test.ts src/services/legacy-controller-lease.test.ts src/__tests__/heartbeat-pending-cleanup-sweep.test.ts src/__tests__/sandbox-creation-operations.test.ts src/services/heartbeat/upgrade-readiness-post-result.test.ts src/services/heartbeat/recovery.test.ts` (in `server/`): 6 files pass. - `npx tsc --noEmit -p server`: no errors. - I checked every reader of the three ids. Each one compares a stored column only with the id of the module that writes that column (`heartbeat_runs.controller_boot_id` with the legacy id, `native_run_finalizations.controller_boot_id` with the native id, metadata `bootId` with the creation id). No reader compares the ids of two modules, so making them equal changes no decision inside one process. ## Risks - Low risk. No schema change and no persisted shape change. - Previous-release story (`rules/upgrade-safe-run-state.mdc`): rows saved by an older release carry that release's random per-module ids. They never equal the new process's id, exactly as a row from any earlier boot never did. They carry forward with no migration. - The start-time cache is correct because a process's own start time never changes. A failed read is not cached, so a transient `ps` failure does not pin the fallback value. ## Model Used - Claude Opus 5.5 (`claude-opus-5-5`), Anthropic, in Claude Code with tool use and code execution. ## Checklist - [x] I have included a thinking path that traces from project context to this change - [x] I have specified the model used (with version and capability details) - [x] I have checked ROADMAP.md and confirmed this PR does not duplicate planned core work - [x] I have searched GitHub for duplicate or related PRs and linked them above - [x] I have either (a) linked existing issues with `Fixes: #` / `Closes #` / `Refs #` OR (b) described the issue in-PR following the relevant issue template - [x] I have not referenced internal/instance-local Paperclip issues or links (only public GitHub `#NNN` / `github.com/paperclipai/paperclip` URLs) - [x] My branch name describes the change (e.g. `docs/...`, `fix/...`) and contains no internal Paperclip ticket id or instance-derived details - [x] I have run tests locally and they pass - [x] I have added or updated tests where applicable - [x] I have updated relevant documentation to reflect my changes - [x] I have considered and documented any risks above - [ ] All Paperclip CI gates are green - [ ] Greptile is 5/5 with no open P2s, recommendations, or follow-ups - [x] I will address all Greptile and reviewer comments before requesting merge 🤖 Generated with [Claude Code](https://claude.com/claude-code) --------- Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>