convex-sentinel — Claude Code skill: what it does, how to install

---
name: convex-sentinel
description: "Set up Sentinel production error capture in your own Convex deployment."
---

<!-- GENERATED from convex-agents content/capabilities/sentinel.json — do not edit by hand. -->

# Capture production errors in your own deployment

Install `@convex-dev/sentinel` to capture production errors (server function failures, client JS/React crashes, OCC and scale signals) into a table in the user's OWN deployment, redacted at write time, then react to new ones. Data never leaves the user's deployment.

## Workflow

1. Install the component: `app.use(sentinel)` in `convex/convex.config.ts`.
2. Wire the client SDK: a React error boundary plus `window.onerror`/`unhandledrejection` and breadcrumbs.
3. Redaction runs at write time and is on by default (default-deny on secret key names and value patterns).
4. Read recent errors with the Convex CLI (`convex data`, `run-once-query`); react to new ones via the monitor's `prod_error` event.
5. Optionally enable the self-healing cron: `triage` classifies each error and, for recurring non-transient ones, hands it to ai-runner to open a fix PR.

## Rules

- Redaction is mandatory and on by default — never store raw secrets; the agent's reads reach the model provider.
- Data stays in the user's deployment; never send it to a third party.
- Sample and cap to control volume and cost.
- Capturing PROD errors needs a deployed cloud app; install works anonymously.