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DottaandPaperclip
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## Thinking Path > - Paperclip manages AI agents and their work. > - Native sessions retain provider state across execution attempts. > - A same-run retry can receive a replacement plugin task lease. > - The executor loaded the old task checkpoint only for crash recovery. > - An ordinary retry could fail its local authority check before reading that checkpoint. > - This change restores the checkpoint through the existing authorized lease transfer. ## Linked Issues or Issue Description **What happened?** A native provider turn ended without its completion result. Paperclip scheduled an exact-checkpoint retry on the same heartbeat run. The retry acquired a new plugin task lease, then failed with `runner_state_identity_mismatch: authority_indeterminate`. The checkpoint restore branch required a `resume_dead_runner` restart claim. Ordinary same-run retries have no such claim. A controlled fixture with a retained remote checkpoint and no local lifecycle receipt reproduces the error. The original controller file contents were unavailable, so that part of the incident mechanism remains inferred. **Expected behavior** Load the retained plugin checkpoint after the existing policy proves the lease transfer is safe. Keep the original run, session, and saved control journal. Reject an unverified predecessor or a changed checkpoint identity. **Steps to reproduce** 1. Start a native session through a plugin task environment. 2. End its provider turn without a completion result and retain its checkpoint. 3. Retry the same run on a replacement task lease without a restart claim. 4. With no local lifecycle receipt, observe the authority error before the checkpoint read. **Paperclip version or commit** Reproduced against source `507dc70be26c191e372f09e58dc0965e73bf8f57`. **Deployment mode** Native Runner with a plugin task environment. The observed provider used ACPX Claude. The controlled executor fixture uses the shared native boundary. Related work: #17439 concerns recovery after controller replacement. This fix uses the existing checkpoint contract and does not depend on that PR. ## What Changed - Restore prior plugin state for an ordinary same-run attempt when its lease changes. - Keep the existing company, agent, workspace, retained-state, and termination checks. - Extend executor regressions for ordinary retries, mismatched checkpoints, and missing stop proof. - Exercise the same-run checkpoint read through the database-backed task API. - Document the recovery rule and verification recipes. ## Verification - Failing before: the ordinary retry reproduces `authority_indeterminate`. Both new denial cases also fail because the old branch never reaches the transfer policy. - Passing after: all six focused checkpoint cases pass. The saved control journal stays byte-for-byte unchanged. Rejected cases do not construct a provider backend. - `pnpm -r typecheck` passes. - Map and module-boundary checks pass. - All 858 executor, database lease-authority, plugin task, and ownership tests pass. `pnpm build` passes. - The broad local `pnpm test:run` attempt did not complete. It hit a 20-second timeout in the existing historical workspace-recovery HTTP Retry case. That exact case then passed in isolation on the unchanged head. The broad local attempt was stopped after the full CI matrix passed; it is not counted as a local pass. - Greptile reviewed current head `5bc11fa978ab87d3d9c5d575fa9666185aaafc2c` at 5/5 with no actionable findings. The full current-head CI matrix passed on attempt 2: 55 checks passed, no pending or failed checks, and two expected Storybook jobs skipped. - The first broader local attempt could not bind embedded PostgreSQL inside the sandbox (`EPERM`). It was stopped and restarted with loopback access. This was a setup failure, separate from the observed red regression. - The first CI attempt failed two existing checks: the process-adapter signoff happy path exhausted its run wait budget, and the workspace export scheduler did not reach `complete` within 20 seconds. Both tests pass in isolated local runs on the unchanged head. Both failed shards passed on their single rerun without code changes. The initial failures remain recorded. Their timing cause is not proven by the later passes. - Live acceptance at the fixed revision has not run. The hosted workspace still serves the earlier release. No deployment or retry of the original task is claimed. ## Risks The new checkpoint read runs only for same-run plugin recovery with a replacement lease. Missing termination proof, changed scope, or a changed Runner identity still stops execution. The lease resolver owns these checks. The fix does not replay tools or change retry budgets. A turn that omitted its completion result still needs the existing bounded continuation to finish useful work. ## Model Used OpenAI GPT-6 through Codex, with reasoning, repository tools, and code execution. The runtime does not expose a more specific backend model ID or context-window size. ## 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>