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## Thinking Path > - Paperclip is the open source app people use to manage AI agents for work > - The orphan reaper (`terminalizeOrphanedRunningRun`) ends a `running` run whose recorded process is gone > - It judged "gone" with `kill(pid, 0)` on the local host, wherever the process actually ran: another host, another PID namespace, or a sandbox > - So a run whose process is alive elsewhere could be terminalized while it still works > - #19868 fixed the same gap for native coordinator takeover and the runtime-control sweep. This pull request finishes finding 2 for the reaper > - The benefit is that a dead local pid never proves an owner on another host is gone ## Linked Issues or Issue Description **Bug description** The Phase 0 ownership inventory (finding 2) names the orphan reaper `terminalizeOrphanedRunningRun` (`recovery/service.ts`) as a proof that accepts "the pid is dead here" for a process anywhere. `heartbeat_runs` recorded `process_pid` with no PID space, and a sandbox pid could collide with a local one. **Steps to reproduce** 1. A run records `process_pid` on host A, or in a sandbox. 2. On host B, that pid number is not alive. 3. B's stale-lock sweep terminalizes the run as `orphaned_running_run`. **Expected behavior** The process-death authority applies only in the PID space that recorded the pid. Issue-terminal authority is unchanged. Refs #19846, follows #19868 ## What Changed - Migration `0442`: add nullable `heartbeat_runs.process_host_hash`. - `heartbeat/run-lifecycle.ts` `persistHeartbeatRunProcessMetadata`, the one writer of `process_pid`, stores `currentProcessSpaceHash()` for a local pid and `"remote"` for a sandbox pid. - `recovery/service.ts`: the process-death authority runs only when `process_host_hash` is null (rows saved before this column, for one release) or `sameProcessSpace` matches. - Tests: the reaper leaves a dead pid alone for another host, a sandbox, and an unreadable space, and terminalizes it in this space. The writer stamps local and remote pids. ## Verification - `npx vitest run src/__tests__/recovery-stale-issue-lock-sweep.test.ts`: 46 passed. - Red before the fix: with the old `recovery/service.ts`, the three cross-space cases fail (the run is terminalized). Green after. - `pnpm db:generate` produced `0442_low_salo.sql` (one `ADD COLUMN`), and the snapshot set was pruned to five. `pnpm --filter @paperclipai/db check:migrations` passed. Server `tsc --noEmit` shows no errors in the changed files. ## Risks - Previous-release story: runs saved with `process_host_hash = null` keep the previous local proof for this release. That matches #19868, because stranding in-flight runs at upgrade would be a restart failure. New rows are strict. - A run whose process really lived on another host now stays `running` until issue-terminal authority, its controller lease, or another owner settles it. - No new I/O before `turn.start`. The hash is computed at module load, and the stamp rides the existing process-metadata update. ## Model Used - Claude Opus 5.5 (`claude-opus-5-5`), Anthropic, used with tool use and code execution in Claude Code. ## 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>