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## Thinking Path > - Paperclip is the open source app people use to manage AI agents for work. > - Agents use task monitors to resume work after a future check. > - The runner rejects monitor arguments that fail the tool schema. > - It returned a generic error with no field or repair guidance. > - An agent could treat a repairable call as a scheduling outage and block its task. > - This pull request adds safe repair guidance and shows the nested request shape. > - Agents can correct the call and confirm a saved schedule before they yield. ## Linked Issues or Issue Description Refs: #15446, #16686. **What happened?** A rejected native `set_task_monitor` call returned `invalid_tool_call` with only “Paperclip rejected this semantic tool call.” The agent could not identify the invalid field. A retry could fail again and leave unfinished work without a scheduled wake. **Expected behavior** Reject invalid arguments before any mutation. Give the provider bounded schema locations and clear repair guidance. A corrected call must save a monitor and allow one wake without duplicate effects. **Steps to reproduce** 1. Call `set_task_monitor` with `idempotencyKey`, `nextCheckAt`, and `notes` at the top level. 2. The schema rejects the call because scheduling fields belong inside `monitor`. 3. Before this change, the provider received no guidance about the required shape. **Paperclip version or commit** Reproduced against master `35c75b56d4` with a failing Rust regression. **Deployment mode** Source checkout. This affects the native runner tool bridge. ## What Changed - Add monitor-specific repair guidance to the runner's existing safe schema error path. - Keep feedback within 512 bytes and omit submitted values and unknown field names. - Show the nested monitor request in the production tool description. Refresh generated contracts and catalog identities. - Test flat and nested invalid input, private value handling, and unchanged authorization errors. - Test rejection, correction with the same key, saved schedule and audit, receipt replay, and one timer wake with real PostgreSQL and the native tool authority. - Update execution documentation and the task verification recipes. ## Verification - Red/green: the Rust provider error regression failed on master because monitor repair guidance was absent. It passed after the fix. - Passed: 29 PostgreSQL monitor and scheduler integration tests. These use the real tool authority and scheduler, with a no-op process agent for wake delivery. - Passed: the native Codex server vertical-slice test. It runs the rebuilt Runner binary with a fake provider and checks durable results and session resume. - Passed: map structure checks, Rust formatting, and `git diff --check`. - Passed locally: full repository `pnpm -r typecheck`, `pnpm build`, and all 392 Rust library unit tests. - Passed on commit `3b667ad24763c1828edd48f56ef7a10766aeb946`: [CI run 39290889768](https://github.com/paperclipai/paperclip/actions/runs/39290889768), including all server, Runner, serialized, browser, typecheck, build, and canary gates. Across the PR, 56 checks passed and four conditional checks were skipped. No check remains pending or failed. - Greptile: 5/5 on that exact commit. The check concluded success, with no review comments or unresolved threads. - The duplicate local `pnpm test:run` attempt did not complete. It was stopped after the full CI suite passed; it is not counted as a local full-suite pass. - The first PostgreSQL attempt could not bind localhost inside the shell sandbox. It passed with normal localhost access. The first broader Rust attempt had 37 socket-permission failures and 355 passes; all 392 passed with localhost access and no code change. - Live model recovery was not run. Local execution policy did not authorize an extra acceptance run through the signed-in provider account. This PR does not include a deployment or recovery of an existing task. ## Risks - Error feedback must not reveal submitted values. Tests cover private values, unknown keys, nested constraints, length bounds, and unchanged generic authorization errors. - This changes guidance only. It does not relax the schema, retry calls automatically, or change scheduling authority. - A new runner binary and refreshed provider contract must reach the target instance before agents receive this guidance. ## Model Used OpenAI Codex, GPT-6, with reasoning, tool use, and code execution. The exact runtime suffix and context window size 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>