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## Thinking Path > - Paperclip is the open source app people use to manage AI agents for work. > - The Daytona driver streams sandbox command output to the host. > - A log socket can stop delivering bytes without closing or rejecting. > - Missing permission requests and cancellation results can leave a run active and block queued work. > - This pull request switches an idle log stream to saved-output polling for the same command. > - The host can receive the missing output without another command dispatch. ## Linked Issues or Issue Description **What happened?** The driver waits for the SDK log-stream promise before it can start recovery. If that promise never settles, the host can miss new output that is already in the provider's saved logs. A run can remain active after a watch completes. Interrupt can then time out with “Execution is still stopping; termination has not been verified.” **Expected behavior** Recover command observation when the live stream stalls. Forward new permission requests and cancellation results. Require a recorded command exit before reporting completion. Keep quiet commands running under the caller's existing lifetime controls. **Steps to reproduce** 1. Start a session command and leave the callback log promise pending. 2. Put new output in the snapshot API without invoking the stream callback. 3. Keep the command running until the host receives that output, then expose its cancellation output and exit code. 4. Verify that the host receives each byte once and dispatches the command once. **Paperclip version or commit** Base commit `479554120d`. **Agent adapter(s) involved** Daytona session commands, including sandbox ACP agent sessions. Related: #14799 handles closed streams; this change handles sockets that never close. #14485 handles input delivery retries. #13262 adds permission diagnostics. ## What Changed - After 15 seconds with no stdout or stderr, switch directly to the existing status and log-snapshot polling path. - Ignore callbacks and delayed failures from the abandoned stream. Clear its idle timer on every exit path. - Preserve byte-offset deduplication, one command dispatch, and independent timeouts for recovery reads. - Add regressions for an initial stream stall, a stall after UTF-8 output, cancellation output, late callbacks, hung recovery reads, and quiet commands that outlive an operation timeout. - Update the provider documentation and keep hour-long healthy-stream coverage active with periodic output. ## Verification - `pnpm vitest run packages/plugins/sandbox-providers/daytona/src/plugin.test.ts`: 245 passed. - `pnpm exec vitest run --project @paperclipai/plugin-daytona`: 339 passed; 14 gated live tests skipped. - Both new stalled-stream regressions fail on the unchanged base driver because it never starts snapshot recovery. Both pass with this change. - `pnpm -r typecheck`: passed. - `pnpm build`: passed. - `pnpm test:run`: the local run did not pass. It was stopped after confirmed local skill-path and macOS skill-cache failures, once complete PR CI was green. Four chat/email tests could not load connector skill files from an ancestor directory outside the checkout. Three company-skills tests hit macOS `EACCES` during cache publication. One unrelated wakeup test timed out in the full run and passed on a focused rerun (`1 passed`, `27 skipped`). No source or test assertions were changed for these failures. This is not a complete local-suite pass. - Complete PR CI on `11ac4e030b`: 53 successful checks, 2 expected skips, no pending or failed checks. The clean CI run includes the full test suite. - Greptile reviewed `11ac4e030b` at 5/5 with no findings or unresolved threads. The branch has no merge conflicts with `master`. - `git diff --check` and a local scan for secrets and private identifiers passed. ## Risks - Quiet healthy commands also switch to polling. Full snapshots can increase bandwidth as output grows; polling remains limited to one snapshot per second. - The SDK exposes no stream cancellation handle. The old socket remains owned by session teardown, and its callbacks cannot publish after fallback. - This change recovers a stalled output stream. It does not claim to identify every cause of an unanswered permission request or change the requirement to verify termination before releasing work. - No schema migration or command replay. ## Model Used OpenAI GPT-6 through Codex, with tool use and code execution. The exact serving model ID and context window are not exposed in this session. ## 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 local change-specific tests; the full suite passes in CI, with local-suite limitations documented above - [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>