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## Thinking Path > - Paperclip controls agent work across service deployments. > - A run can provision a remote sandbox before a process or invocation event exists. > - Each container previously treated its own missing process handle as proof that the run was orphaned. > - Overlapping deployments could therefore fail a run owned by another container. > - This pull request records and renews a controller lease before provisioning. > - A recovery worker must revoke an expired owner before it finalizes the run. ## Linked Issues or Issue Description Merged PR #13272 records startup adapter identity and restores explicit user continuation. This PR adds controller ownership on top of current master. Refs #7997 and #10442 for related replica and ownership problems. Related #13138 addresses silence and detached local processes; this change does not infer death from silence. **What happened?** During an overlapping hosted service deployment, a new container reaped a legacy conversation run that another container was provisioning. The run had no PID or adapter invocation yet. **Expected behavior** A live controller keeps its run. After controller loss, one recovery worker takes cleanup authority and the old controller cannot dispatch further work. **Steps to reproduce** Claim a legacy run in controller A. Start controller B against the same database before A finishes provisioning. Run the startup reaper in B. **Paperclip version or commit** Observed on `663c44cb2b9c28336d38d0b4a6971f4f1964bce6` in a hosted Railway deployment with a Daytona environment. ## What Changed - Add nullable controller boot ID, lease deadline, and execution stage columns. Claim ownership in the queued-to-running update. - Renew ownership independently of run output. Abort and reject dispatch if renewal fails. - Serialize reaper revocation against renewal. Let unfinished recovery claims expire after a restart. - Restrict graceful shutdown to legacy runs owned by the current controller. - Hand ownership back to the existing native coordinator when runtime selection becomes native. - Add twelve database regressions and document the lease contract. Update the task-drain regression to require controller expiry before reaping. ## Verification - `pnpm exec vitest run server/src/services/legacy-controller-lease.test.ts server/src/__tests__/heartbeat-task-drain-admission-release.test.ts`: 14 passed after rebasing onto master (`f12b647ae`). - Queue-interruption regressions in `heartbeat-process-recovery.test.ts`: 2 passed after preserving the new cleanup promotion from #13275. - `pnpm --filter @paperclipai/server exec tsc --noEmit`: passed after rebuilding runner TypeScript outputs for the updated master. Broad local tests are omitted at the maintainer’s request; CI owns broad coverage. - Latest-head CI passed on `f255e8e4d5ab2b24b12638a02434e6aa8a2285c5`: [run 34658248569](https://github.com/paperclipai/paperclip/actions/runs/34658248569). All test shards, browser suites, typecheck, build, canary, and security checks passed. Greptile is 5/5 with no unresolved review threads. ## Risks - Additive, idempotent migration; historical rows retain the previous recovery behavior. - Database unavailability aborts new dispatch rather than permitting an unfenced controller to continue. - Lease expiry is permission to clean up, not evidence that remote inference stopped. Follow-up PRs add persistent cleanup and automatic continuation. - Mixed-version deployment still includes old binaries whose reapers do not understand controller leases. ## Model Used OpenAI GPT-6 through Codex, using reasoning, repository inspection, code execution, and test tools. The precise backend revision and context-window size are not exposed in this session. ## 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 - [x] All Paperclip CI gates are green - [x] Greptile is 5/5 with no open P2s, recommendations, or follow-ups - [x] I will address all Greptile and reviewer comments before requesting merge --------- Co-authored-by: Paperclip <noreply@paperclip.ing>