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Nicky LeachandPaperclip
b83e14ad2c
## Thinking Path > - Paperclip is the open source app people use to manage AI agents for work. > - The workspace runtime starts guest processes and exposes their ports. > - The readiness wait bound the guest port to test whether it was ready. > - That bind could take the port before the guest process used it. > - This pull request reads listener state without a competing bind and recovers from a real port collision. > - The benefit is stable runtime exposure and a clear recovery path for a genuine collision. ## Linked Issues or Issue Description **What happened?** The managed HTTPS exposure test failed intermittently with `listen EADDRINUSE` on `127.0.0.1:42000`. The readiness wait bound the guest port before the guest process could bind it. **Expected behavior** The readiness wait must not hold the guest port. The runtime must recover when an external process owns the assigned port. **Steps to reproduce** 1. Run `npx vitest run server/src/services/workspace-runtime-exposure.test.ts` from the repository root. 2. Inject a delayed guest bind and a widened readiness-probe hold. 3. Observe the port collision before this fix and the successful retry after this fix. **Paperclip version or commit** `b375bbd913cb2edc8e077f4339ce0745e53bd462` **Deployment mode** Built from source with the server test suite. **Installation method** Built from source with pnpm. **Agent adapter(s) involved** Not adapter-specific. This is a core runtime test. **Database mode** Not database-related. **Relevant logs or output** Before this fix, the test reported `listen EADDRINUSE: address already in use 127.0.0.1:42000`. ## What Changed - Read listener presence from `/proc` on Linux instead of binding the guest port. - Keep the bind probe as the fallback on non-Linux hosts. - Capture the current port owner when an exposed guest exits with `EADDRINUSE`. - Quarantine the app and HMR pair, then allocate the next free port pair within the existing range. - Add a deterministic regression test for quarantine, re-allocation, and self-diagnosis logging. ## Verification - Run `npx vitest run server/src/services/workspace-runtime-exposure.test.ts` from the repository root. - The target suite passes 19 tests locally. - The related runtime suites pass 105, 128, and 21 tests locally. - Run `tsc -p server/tsconfig.json` to check the changed server files. - CI must pass the general server shard and all required checks. - Greptile must report 5/5 with no open P2 comments, recommendations, or follow-ups. ## Risks The Linux readiness path now depends on `/proc` listener data. Non-Linux hosts retain the existing bind-probe fallback. The port range and allocation limit do not change. ## Model Used OpenAI GPT-5. This agent used tool calls for repository checks and GitHub PR management. Priya Raman authored the code change. ## 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>