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## Thinking Path > - Paperclip is the open source app people use to manage AI agents for work > - The chat evaluation catalog checks agent replies and then the human step that follows, such as a person who reveals a key or approves a device > - Some human steps run in a separate private browser process, because they handle credentials. CI keeps the output of that process private on purpose > - Four cases failed only in that private step, so CI showed one fixed message and no cause > - I ran each private step locally against a dev server, where its output is visible, and found the cause of three failures > - This pull request fixes the harness and two product defects, and adds a closed failure record so that the next CI failure names its step > - The benefit is that these human steps work, and a private-step failure is diagnosable without any credential in logs ## Linked Issues or Issue Description Bug report (following `.github/ISSUE_TEMPLATE/bug_report.yml`). **What happened?** - `routines.webhook-trigger`: the private person opens the routine overview. The trigger cards are only in the Triggers section, so the step waits for a missing button. An unhandled response wait then stops the process. - `connection-setup.secure-api-key`: a key-protected MCP server answers 401 without a challenge header. Paperclip shows "Remote app returned HTTP 401" and does not ask for a key. The person cannot enter the key in the normal flow. - `assistant-connections.device-login`: an expired device code page shows "This item doesn't exist or was moved." The server sends "This code is expired, already decided, or invalid." in the OAuth `error_description` field, and the UI drops it. - `onboarding.new-company`: the private step reads back all saved state and then fails one proof check. CI does not say which check. **Expected behavior** - The person reveals the webhook key in the Triggers section and sends authenticated events. - A pasted MCP link that answers 401 shows the key field. - An expired device code says that the code is expired. - A private-step failure names its fixed step and error class, with no value. **Steps to reproduce** 1. Start a local dev server. 2. Create a routine with a bearer webhook, and run the private webhook worker. It times out on the "Edit webhook" button. 3. Paste the address of an MCP server that answers a plain 401 into Connectors > Add by link. No key field appears. 4. Open `/mcp-device?user_code=<expired code>`. The page shows generic not-found text. **Paperclip version or commit** `master` (reproduced on origin/master before this change) **Deployment mode** Local dev server (embedded PGlite) and the CI chat-eval runner **Installation method** Source checkout (`pnpm dev`) ## What Changed - `integrator-webhook-private-worker.ts`: open `<routine>/triggers` (also for the setup-resume link), and attach a handler to the early response wait so a failed click reports its real step. - `server/.../catalog/discovery.ts`: a 401 with no `WWW-Authenticate` header, to a connection that sends no credential, is handled like a challenge without discoverable sign-in (`oauth_challenge`). The existing UI guidance then asks for a key. A 401 to a connection that already sends a credential keeps the old error. - `ui/src/api/errors.ts`: read the OAuth `error_description` field as a readable server message. - New `private-child-failure.ts`: a private child records only a fixed step name and an error class from a fixed list. The parent echoes a step only when it is in the caller's closed list. Error text, stdout and stderr stay private. - The webhook, private browser and identity children use it. Each has a closed step list file. - `identity-new-company-native-proof.ts`: each proof check has a fixed reason name. The private child reports `new-company-proof-<reason>` when a check fails. The accepted conditions do not change. - Tests: server red/green test for the bare 401, UI red/green test for `error_description`, unit tests for the failure record (no text leaks, closed list only, extra fields dropped). ## Verification - Local dev server (embedded PostgreSQL), private workers run directly with the real child process: - Webhook, ready and setup-pending triggers: before, timeout on "Edit webhook". After, receipt with invalid status 401, valid status 202 and a linked task. - Secure key entry with the synthetic notes provider: before, timeout on the key field. After, an active connection with health `ok` and 2 authorized `tools/list` calls. - Expired device page: before, `at step device-expired-page (TimeoutError)`. After, `expiredPageVisible: true`. - `server`: `vitest run src/__tests__/tool-access-service.test.ts -t "pasted link answers"` (fails before the discovery change with 502, passes after). - `ui`: `vitest run src/api/errors.test.ts` (fails before, passes after). - `pnpm test:e2e:runner:typecheck`, `pnpm test:e2e:runner:unit`, server `tsc --noEmit`. - `node tests/runner-e2e/source-sdk-public-inputs.mjs <HEAD sha> --check`: unchanged. - One paid run of the four cases on this branch. Results are in a PR comment. ## Risks - A plain 401 from an MCP link now returns 422 `oauth_challenge` instead of 502. The draft connection is removed, as for other challenges. Agents that call the connect API see the "needs sign-in" answer instead of a raw status. This only applies when the connection sends no credential. - Some API errors that carry `error_description` now show that text instead of generic copy. That text is written for people. - The failure record is opt-in per child and contains only constants. The parent ignores a record with any other field. - `onboarding.new-company` is not fixed here. Its native hello probe cannot start locally on macOS, so the failing check is not yet known. This change makes the next run name it. ## Model Used - Claude Opus 5.5 (`claude-opus-5-5`), Anthropic, with tool use (shell, file edits, local browser automation through Playwright). Extended reasoning was on. ## 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>