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DottaandClaude Opus 5.5
f09b4704b6
## Thinking Path > - Paperclip is the open source app people use to manage AI agents for work > - Task recovery restarts agent work after a control-plane restart or a failed run > - When automatic recovery runs out or is blocked, the user clicks Retry > - Retry then started a fresh isolated attempt cloned from committed HEAD, so the agent lost its uncommitted files, its task branch and the worktree Git link > - A restart must never lose the agent's work > - This pull request makes Retry keep the task's own workspace when that is safe, and tells the agent where the old files are when a fresh attempt is still required > - The benefit is that a Retry continues the real work instead of starting over ## Linked Issues or Issue Description **What happened?** After `native_restart_recovery_blocked` or an exhausted recovery generation, a Retry ran in `isolated-workspace-attempts/<company>/<issue>/<run>/workspace`. That directory was a detached clone of the base ref. It did not contain the uncommitted edits from the issue's git worktree. It was not on the task branch. The agent was not told where the old files were. A restart-chaos wave graded this as an R2 failure (`pre_fault_files_lost`). A second defect: when a restart hit the bootstrap of a fresh attempt, preparing the same run again failed with `isolated_task_directory_binding_mismatch`, so the Retry could not finish. **Expected behavior** Retry continues in the task's own workspace with its edits and `.git` intact when no other writer can hold it. When a fresh attempt is really needed, the old directory stays as it was and the agent gets its path and its changed files. Preparing the same attempt again after a restart is idempotent. **Paperclip version or commit** `master` at `e482f0f632`, restart-chaos waves on 2026-11-06. **Steps to reproduce** 1. Start a native task in a git worktree. Let the agent write an uncommitted file. 2. Kill the control plane so recovery ends in `native_restart_recovery_blocked` or an exhausted generation. 3. Click Retry. 4. The successor runs in a fresh clone without the uncommitted file or the task branch. Root cause: - `server/src/services/fresh-workspace-continuation.ts` `canSelectFreshWorkspace` returns a fresh intent for every task Retry that has a system recovery record. - `server/src/services/explicit-native-continuation.ts` (fresh selection in the source loop) then always persisted `fresh_isolated_workspace`. - `server/src/services/fresh-workspace-seed.ts` `materializeFreshWorkspaceSeed` clones the project source at the base ref with `--no-local`, checks out a detached commit and removes `origin`. Uncommitted work and the branch are not carried over. - RC-35: `server/src/services/heartbeat/workspace-preparation.ts` rejected any reusable existing workspace while `fresh` was true, including the attempt directory that the same run had already created and bound. ## What Changed - New continuation mode `reuse_issue_workspace`. At Retry admission, after all stop proofs pass, `retainedIssueWorkspaceForRetry` checks that the task's bound workspace is the single local directory the failed run used, owned by the task, not a shared workspace, not under remote storage authority, with no other lease, failed cleanup or running workspace operation, a settled recovery generation, no workspace-export failure, and a readable Git state rooted at that directory. Then the Retry continues there with a fresh session. Otherwise the existing fresh attempt is kept. - The reuse decision consumes the generation's one alternative attempt (`freshAttemptRunId`), sets the Retry strategy to `continue`, and records `issue.retry_workspace_reused`. - Environment selection pins the reused workspace binding and fails with `retry_workspace_binding_mismatch` if the binding changed before dispatch. - Fresh fallback: the run's continuation context gets `priorWorkspace` (path, branch, bounded list of uncommitted files). Git status is read with optional locks disabled. The prompt tells the agent to inspect it and carry over the work. The old directory is not changed. - RC-35: preparing the same fresh attempt again after a restart reuses the attempt directory that this run already bound. - Reuse checks run Git through the shared workspace scan scheduler with short deadlines, because admission can hold the issue lock. - `doc/task-recovery.md` and `doc/execution-semantics.md` describe the new contract. ## Verification - `server/src/services/retry-workspace-continuity.test.ts` (embedded Postgres, real git worktree with uncommitted edits): - exhausted-generation Retry and blocked-recovery Retry continue in the same worktree, `.git` file and branch intact. Both failed before the fix (readiness was `fresh_isolated_workspace`). - Blocked recovery without a generation and duplicate holds for one run also reuse the worktree. A running operation orphaned by a restart of the stopped source does not block reuse. - The fresh attempt is kept when the workspace is unsafe: live lease, running workspace operation, corrupt `.git`, missing directory, remote authority, shared workspace, running export generation. `priorWorkspace` is omitted for the unsafe writer and shared cases. - `workspace-preparation.test.ts`: - A `reuse_issue_workspace` Retry prepares in the original worktree with its uncommitted file and branch. - RC-35 red/green: re-preparing the same fresh attempt reuses its bound directory and keeps files written before the restart. Another run still gets `isolated_task_directory_binding_mismatch`. - The fresh fallback sets `priorWorkspace` with the old path and `unpublished.txt`. - `environment-selection.test.ts`: the new mode pins the binding and rejects a changed binding or cwd. - `packages/adapter-utils/src/server-utils.test.ts`: the prompt names the retained directory and its files. - Regression files run locally: `workspace-preparation`, `environment-selection`, `task-retry`, `quarantined-task-retry`, `explicit-native-continuation`, `workspace-recovery`. - Restart-chaos (`tests/restart-chaos`, local, B1+B5, codex+claude, K1/K4/K6, concurrency 2, rc06-masked): - Final head: wave `w-20261107T014633-s7206` on `c6776283f3`: 8/8 PASS, all 8 restart-crossing. 5 tasks needed a Retry (t03-t07: codex B1 K6, codex B1 K1, codex B5 K6, codex B5 K1, claude B5 K6). All five finished in the original git worktree with `.git` and every pre-fault file present (`workspaceMovedTo` empty, `lostFiles` empty); no "Retry keeps a fresh attempt" log line. - Wave `w-20261107T004829-s7205` on `29373a6b6a`: 8/8 PASS, all 8 restart-crossing. 3 tasks needed a Retry (t02, t06, t07). All three finished in the original git worktree with `.git` and every pre-fault file present; no "Retry keeps a fresh attempt" log line. (`cc178492ef` only makes the operation filter stricter for run-less jobs.) - Wave `w-20261107T000412-s7204` on `d197082107`: 8/8 PASS, 7 restart-crossing. 3 tasks needed a Retry (t02, t04, t06). All three finished in the original git worktree (`workspaceMovedTo` is empty), R2 passed with `.git` and every pre-fault file present, and no "Retry keeps a fresh attempt" log line appeared. - Wave `w-20261106T231416-s7203` on the first commit: 6/6 PASS, but its t01 Retry still moved to `isolated-workspace-attempts`. That instance was not kept, so the exact rejection was not recorded. The likely cause is a `running` workspace operation that a killed server left on the stopped source (the source restarted three times). The second commit treats such restart orphans as not live and logs the rejection reason. A `--replay` of that t01 on `d197082107` finished in the original worktree with its `.git` file and no attempt directory. - Review follow-ups in `d197082107`, `29373a6b6a`, `cc178492ef` and `c6776283f3` (run-less workspace jobs still block reuse; red/green covered by the `running_operation` case): holds are grouped by source run; the readiness fallback (blocked recovery without a generation) also reuses the task workspace; Git probes go through the shared scan scheduler with 10-15 s deadlines; `priorWorkspace` is only set for a task-owned directory with no other writer; the reuse rejection reason is logged; `priorWorkspace` uses the same task-owned, settled, single-writer predicate as reuse; Git probes share one budget per workspace; the RC-35 check is a pure path check; renames are parsed from either porcelain column. ## Risks - A Retry now writes into the old directory instead of a new one. The checks above prevent a second writer. A stale binding fails the run with `retry_workspace_binding_mismatch`; it does not write to another directory. - If the cause of the failure was inside the workspace itself, reuse could repeat it. Workspace-export failures, restore failures and required workspace recovery keep the fresh attempt. - A workspace operation of the stopped source that started before the source settled and before the current server process no longer blocks reuse (a restart orphan). Operations with no run, of another run, or started in the current process still block it. - `priorWorkspace` is an optional new field in the continuation envelope. Older adapters ignore it. ## Model Used - Claude Opus 5.5 (`claude-opus-5-5`), Anthropic, used through Claude Code with tool use (shell, file edits, test runs). ## 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>