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DottaandClaude
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## Thinking Path > - Paperclip is the open source app people use to manage AI agents for work > - A native run keeps its provider conversation when its local runner dies. When the restored runner finds that the active turn was lost, it reports `provider_turn_lost_on_restore` and does not invent a result. > - After a control-plane restart, the admitted restart attempt may send one continuation in that same conversation (#15297). The agent then reconciles unfinished work. The task is not resent. > - A runner can also be lost without a server restart, for example when `runner.drain` times out. The run then resumes itself after the retry delay from its exact checkpoint. That path never allowed the continuation, because the executor passed `resumeInterruptedTurn` only for a `resume_dead_runner` restart claim. > - So the lost turn failed with `native_provider_terminal_failed`, automatic replacement was refused (`uncertain_provider_action`), and the user had to click Retry. > - This pull request allows the same single continuation for that resume, but only when durable records prove the same three facts that a restart claim proves. > - The benefit is that a runner lost mid-turn continues in the same conversation with no Retry. No case that is refused today becomes allowed without that proof. ## Linked Issues or Issue Description Refs #15297, #20625 **What happened?** Restart-chaos wave L7 (seed 9107, local), task codex B5 TM2, run on master after #20625. A TM3 restart resumed the run (attempt 1). During the TM2 freeze the TS runtime lost its runner: `native_session_recovery_failed: runner_local_connect_failed: PRP command runner.drain timed out`. The executor saved `retryable_failure` with `recoveryMode: "exact_checkpoint_resume"`. After the delay, recovery verified the runner process stopped (`native.local_process_stopped`). The same run then resumed as attempt 2 (`native.process_start_requested`, `providerAttempt: 2`). The restored runner reported `turn.failed` with `provider_turn_lost_on_restore` (`recoverable: true`). No continuation was sent. The run failed with `native_provider_terminal_failed`, recovery stopped with `uncertain_provider_action` / `preserve_without_replay_v1`, and the task needed Retry. **Expected behavior** The run sends the one same-conversation continuation, exactly as it does after a restart claim, and finishes without Retry. **Steps to reproduce** `node cli/node_modules/tsx/dist/cli.mjs tests/restart-chaos/main.ts --env local --adapters codex,claude --workloads A1,B5,C1 --faults TM1,TM2,TM3 --time-age-hours 1 --concurrency 3 --tasks 6 --seed 9107` (timing-dependent: the drain timeout must land during an active turn). ## What Changed - New `server/src/services/native-runtime/scheduled-resume-continuation.ts`. It decides whether a same-run scheduled resume may continue a lost turn. Each of the three proofs comes from a durable record: 1. **The previous runner is stopped.** The latest process record of the run in `heartbeat_run_events` (`native.process_start_requested`, `native.process_identity_recorded`, `native.local_process_stopped`) must be `native.local_process_stopped`. Its `processPid` must equal its `processGroupId`, and neither the pid nor the group may be alive now. This is the existing `readNativeLocalProcessStop` check, read in the claim transaction before this attempt records its own `native.process_start_requested`. 2. **The attempt was admitted under the bounded budget.** The executor's claim moves `native_run_finalizations` from phase `retryable_failure` to `observed`. It charges a provider attempt, and the claim refuses any attempt above 3 (`native_session_retry_exhausted`). The decision also requires `1 <= attempt <= NATIVE_PROVIDER_RECOVERY_ATTEMPT_LIMIT`. 3. **It is the same provider conversation.** The saved `failure_detail` must show `recoveryMode: "exact_checkpoint_resume"`, `recoverable: true`, `providerSessionEstablished: true` and `checkpointExists: true`, with no `successorRunId` or `replacementDenied`. At run time the existing runtime guards still apply: the backend must recover the checkpointed session (`recovered`, not a continuity-break replacement), and the lost turn must equal the checkpoint's `activeTurnId` and the snapshot's interrupted turn. The provider kinds stay codex, acpx and opencode, with no compaction, goal control, held result or pending runtime request. - `native-session-executor.ts`: computes that decision in the coordinator claim. It passes `resumeInterruptedTurn` when either the restart claim is `resume_dead_runner` (unchanged) or the decision allows it. - `doc/execution-semantics.md`: describes the rule and the refused cases. **Cases that stay refused** (each has a test in `scheduled-resume-continuation.test.ts`): - a restart-recovery claim (it keeps its own existing rule); - a remote execution target; - a coordinator that is not `retryable_failure`, including a fresh run; - `recoveryMode` `bootstrap_retry` or `ambiguous_state`, or no saved failure detail; - a failure that is not recoverable; - no established provider session; - no checkpoint; - a recorded replacement (`successorRunId` or `replacementDenied`); - an attempt outside 1..3; - no stop receipt, a stop receipt superseded by a newer launch, a stopped process that is still alive, or a run that never had a process. The runtime-side refusals are unchanged and already covered by `native-session-runtime.test.ts`: real provider errors, historical error-null failures, and no restart permission. ## Verification - `cd server && npx vitest run src/services/native-runtime/scheduled-resume-continuation.test.ts`: 22 tests, covering the decision table and the stop receipt in embedded Postgres. - `cd server && npx tsc --noEmit` passes. - Live: not proven. An L7 wave on this branch (seed 9107) did not reproduce the drain-timeout path, so this pull request has unit and database tests only. In that wave the same cell (codex B5 TM2) needed Retry for a different reason: TM2 aged its restart-recovery claim lease before dispatch, and budget admission refused with `Native recovery no longer owns provider dispatch`. This pull request does not change that path. Four other tasks passed. Claude C1 TM2 rested blocked without a Retry button, which is a separate cleanup-quarantine issue. ## Risks - This allows one more path to send the same-conversation continuation. It is limited to local runs. It needs the same proofs as a restart claim, and it uses the attempt the resume already charged. It does not change the generation cap or `restartResumeKeepsAttempt`. - A rolling deploy reads `failure_detail` and stop events written by earlier releases. Those fields and events already have this shape, so an older saved failure is judged by the same rule. ## Model Used - Claude Opus 5.5 (`claude-opus-5-5`), Anthropic, via Claude Code with tool use (shell, file edits, test runs). Extended reasoning. ## 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 <noreply@anthropic.com>