# Willyu1007 AI First Template Data Fetching > Data Fetching - Skill: `tomevault-io/willyu1007-ai-first-template-data-fetching` (Agent Skill, multi-file: 2 files) - Install (CLI): `npx skillmds@latest add tomevault-io/willyu1007-ai-first-template-data-fetching` - Raw SKILL.md: https://api.skillmd.com/api/skills/tomevault-io/willyu1007-ai-first-template-data-fetching/raw - Safety review: pending (external: skill-scanner PASS, skillspector PASS) - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: Coding & Dev Tools - Author: tomevault-io (https://skillmd.com/u/tomevault-io) - Updated: 2026-09-17 - Page: https://skillmd.com/skills/tomevault-io/willyu1007-ai-first-template-data-fetching --- # Data Fetching This skill describes patterns for client-side data fetching and caching. --- ## 1. Core rules 1. Prefer a single data access layer (API client + feature APIs). 2. Use stable query keys for caching. 3. Invalidate caches intentionally on mutations. 4. Keep loading/error UX consistent (Suspense or explicit states). --- ## 2. Query key pattern Example shape: - `["users", "list", filters]` - `["users", "detail", userId]` Avoid: - keys that depend on unstable object identity - mixing unrelated resources in a single key --- ## 3. Mutation pattern After a successful mutation: - invalidate affected list queries - update detail caches when possible --- ## 4. Error handling - Show user-friendly errors. - Capture exceptions to monitoring with route/feature context (when available). --- > Converted and distributed by [TomeVault](https://tomevault.io/claim/willyu1007) — claim your Tome and manage your conversions.