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DottaandClaude Opus 5.5
3374ca54f5
## Thinking Path > - Paperclip is the open source app people use to manage AI agents for work > - The native runner (`runnerd`) runs each provider turn, and the server records why a run stopped and what the person can do next > - When `runnerd` exits during a provider turn, the server saved the run as `native_provider_terminal_failed`: "The provider session is permanently unusable", with automatic retries stopped > - The real cause was the runner process, and the transport already names it (`native_runner_process_exited`) at the start of the closed-stream message > - Separately, the process-lineage sampler added in #19727 panicked on Linux debug builds when a provider tool started its own session, and that panic text became the run's visible failure > - This pull request records a runner exit mid-turn as runner loss, and reads session IDs without the assertion that panicked > - The benefit is that a person sees the true cause of a stopped run, and recovery treats a lost runner like every other runner exit ## Linked Issues or Issue Description Refs #19727 **What happened** A chat eval killed only the owned `runnerd` process (SIGKILL) while a provider tool was running. The run failed with `errorCode: native_provider_terminal_failed` and the next action "The provider session is permanently unusable". The error text was `Notification transport failed closed: native_runner_process_exited: runnerd exited unexpectedly: paperclip-runnerd panic: panicked at rustix-1.1.4/src/pid.rs:61:9: assertion failed: raw > 0`. The panic came from the lineage sampler thread before the kill. It called `rustix::process::getsid`, which asserts a nonzero session. A kernel thread, or a process whose session leader is outside the PID namespace, reports session 0. **Expected behavior** A runner process exit is recorded as `native_runner_process_exited`, the same cause the server already uses for a runner exit outside a turn. Recovery then applies its normal runner-loss rules (checkpoint evidence, bounded attempts, cleanup quarantine). The lineage sampler does not panic, and its diagnostics do not replace the real failure text. **Steps to reproduce** 1. Start a native OpenCode run on Linux with a debug `runnerd`. 2. Let the agent run a shell tool that starts its own session (for example a long `node -e` command). 3. Send SIGKILL to the `runnerd` PID only. 4. Read `GET /api/heartbeat-runs/<runId>`: `errorCode` is `native_provider_terminal_failed` and the error names the rustix panic. ## What Changed - `nativeSessionFailureSourceCode` returns `native_runner_process_exited` for a `NativeProviderTerminalFailure` with code `notification_transport_failed` when its message starts with `Notification transport failed closed: native_runner_process_exited: `. Only the runner transport writes that prefix. Other closed-stream causes stay `native_provider_terminal_failed`. - `paperclip-process-table` has a new `session(pid)` function. Linux reads the session field of `/proc/<pid>/stat`. macOS calls `getsid`. A session of 0 or an error gives `None`. - `process_lineage` reads sessions through `paperclip_process_table::session` instead of rustix `getsid`. - Regression tests: the runner-loss classification (attempts 1 and 3, and three negative shapes), the stat session parser with a kernel-thread line, and a live read of this process's session. ## Verification - `cd server && npx vitest run src/services/native-runtime/native-session-executor.test.ts -t "runner process exit that closed|preserves stable provider and runner|model rejection from a provider terminal|operator-owned through terminal"` (8 passed) - `cd packages/paperclip-runner/runner && cargo test -p paperclip-process-table` (macOS: 3 passed; the Linux-only parser tests run in CI) - `cd packages/paperclip-runner/runner && cargo test -p paperclip-runner-core --lib process_lineage` (6 passed) - End to end: the `recovery.*` chat eval cells that kill `runnerd` are run against this change on a separate eval branch. ## Risks - Behavior shift: a runner exit during a turn now follows runner-loss recovery instead of stopping as a permanent provider failure. Recovery still decides from durable evidence. Ambiguous state stays terminal, and an unverified cleanup stays quarantined. - Previous-release story: no persisted shape changes. Runs saved earlier with `native_provider_terminal_failed` keep that code. Only new failures are classified with the new rule. - The session read on Linux now uses `/proc` instead of a syscall. It gives the same value, and it reports 0 (now `None`) in the same cases. ## Model Used - Anthropic Claude Opus 5.5 (`claude-opus-5-5`), via Claude Code with tool use (shell, file edits). ## 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>