Individual skill

error-handling

Designs typed, observable, recoverable error handling - an explicit taxonomy of retryable vs terminal failures, Result types at boundaries, single-point logging, and retry policies with real backoff numbers. Use when someone asks "should I retry this error", "how do I structure error types", "why are my logs full of duplicate stack traces", "where do I put the try/catch", or is designing failure paths for an API, job, or client. Do NOT use for building the circuit breaker component itself - use circuit-breaker-builder instead; do NOT use for handling 429s against third-party APIs - use rate-limit-handler instead; do NOT use for writing user-facing error copy - use error-message-writer instead.

skills/error-handling/SKILL.md

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# Error Handling

Most production incidents are not caused by the original failure - they are caused by the handling: a retry storm that turns one slow dependency into a full outage, a swallowed exception that surfaces as silent data corruption three weeks later, or duplicate logging at five layers that buries the root cause. This skill designs error handling as a first-class part of the system: every failure classified, every class given one owner and one response.

## Operating procedure

### Step 1: Gather inputs

- The unit of work being protected (a request, a job, a batch, a UI subtree).
- Every external dependency it touches and which operations are idempotent.
- Where errors currently surface (logs, tracker, user) and who consumes each.
- Latency budget - it caps how much retrying is even allowed.

### Step 2: Build the error taxonomy
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