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DottaandPaperclip
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## Thinking Path > - Paperclip is the open source app people use to manage AI agents for work. > - Hosted instances must become quiet when they have no work. > - Browser Use queried its session table every three seconds, even when empty. > - Existing session rows already store the next poll time and cleanup lease. > - This pull request uses commit signals and those saved deadlines to schedule cleanup. > - Empty instances stop browser database scans. Live sessions keep their safety checks. ## Linked Issues or Issue Description **What existing behavior does this improve?** Browser Use background cleanup and recovery. This follows #15625 and #15750. **Subsystem affected** server/ — REST API and orchestration services. **Current behavior** The app scans for due sessions every three seconds, including instances that have never used Browser Use. **Proposed behavior** Scan once at startup. Wake after session creation, provider-create settlement, stop requests, or credential-removal cleanup. Schedule the next check from `nextPollAt` and `leaseUntil`. Stop scheduling when all sessions are terminal. **Reason and benefit** Remove empty database traffic so idle stacks and their database connections can become quiet. **Breaking changes** No API or schema change. Running and idle sessions retain provider polling, cost accounting, access checks, expiry checks, and cleanup retries. ## What Changed - Register browser cleanup with the existing work coordinator. Remove the app's three-second interval. - Signal existing session transactions before writes. No new tables or provider infrastructure. - Restore deadlines from live sessions and their leases. Wake after a credential-removal sweep releases its lease. - Wait for concurrent cleanup instead of returning while it still runs. Drain and standby preserve deferred work. - Add scheduler tests and database-backed commit and restart coverage. Update the connector guide and sleep inventory. ## Verification - Passed: focused browser worker and shared coordinator tests, 17 tests. - Passed: browser lifecycle, route-scope, viewport, and transport tests, 50 tests. The lifecycle suite uses real local Postgres and a simulated provider. - Passed: `pnpm -r typecheck` and `pnpm build`. - Passed: all hosted test groups for this commit. Started full local `pnpm test:run`, then stopped its duplicate serial run after the complete hosted sharded suite passed; no full local-suite pass is claimed. - Passed: direct server TypeScript check. Greptile reviewed `99c3217a2dea505be94081e729941e542e6fbc03` at 5/5 with no findings. All 54 applicable hosted checks passed; the two Storybook checks were skipped because this PR has no UI changes. ## Risks - Process-local signals cover services that share the instrumented database owner. Independent processes and direct SQL writes require startup recovery; this does not add cross-process notification. - Live sessions still poll. This removes empty scans; it does not make a running hosted browser sleep. - Cleanup uses the existing provider protocol and lease fences. Tests simulate the provider; no paid live browser was created for this scheduling change. ## Model Used OpenAI Codex, GPT-6, with reasoning, tool use, and code execution. The exact deployment 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 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 - [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>