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## Thinking Path > - Paperclip manages AI agents and their work. > - The runner executes agent turns on local and remote providers. > - A remote per-turn session must save its state before Paperclip releases its sandbox. > - The session runtime returned after 100 milliseconds while the remote checkpoint still ran. > - The next turn also checked the local state path instead of the verified remote backup. > - This pull request waits for the bounded remote close and accepts only a verified suspended backup. > - The benefit is reliable multi-turn execution without weaker identity checks. ## Linked Issues or Issue Description **What happened?** A successful remote agent turn released its sandbox before the runner saved the verified continuation backup. The next turn failed with `runner_state_identity_mismatch`. **Expected behavior** Paperclip must finish the bounded remote checkpoint before it releases the sandbox. A later turn must validate and restore the digest-matched suspended backup. **Steps to reproduce** 1. Run a native ACPX Claude Plan test in a non-reusable Daytona sandbox. 2. Reject the first plan to start a second turn. 3. Observe that the second turn fails before provider execution. **Paperclip version or commit** The failure reproduced at `13775a90b078ff64872f50961ea1b83d575e7bc6`. **Deployment mode** GitHub Actions with a Daytona sandbox. ## What Changed - Wait for the internally bounded remote runner close and checkpoint before the host returns. - Preserve the existing short cleanup bound for other providers. - Validate remote continuation lifecycle from a complete digest-verified backup when local runner state is absent. - Keep corrupt, non-suspended, mismatched, and unverified state fail-closed. - Make native Plan completion and accepted-Plan wake prompts deterministic. ## Verification - A prior 45-cell local campaign passed 44 cells. The only failure was the OpenCode Plan prompt variance fixed here. - A focused OpenCode local Plan rerun passed. - ACPX Claude Daytona message and question cells passed. - Focused regressions cover delayed checkpoint close and verified remote backup lifecycle. - GitHub Build and the focused ACPX Claude Daytona Plan cell will validate this exact head. ## Risks Remote runnerd sessions now wait for their internally bounded close/checkpoint path before returning; generic provider cleanup retains the existing 100 millisecond bound. Durable run success still cannot be reversed. The environment release guard still blocks sandbox destruction when no verified backup stamp exists. ## Model Used OpenAI Codex, GPT-5.6, extended reasoning, with code execution and GitHub Actions inspection. ## 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 and contains no internal task id - [ ] I have run tests locally and they pass - [x] I have added or updated tests where applicable - [ ] 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 findings - [ ] I will address all Greptile and reviewer comments before requesting merge |
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