# Flutter > Flutter patterns — widget architecture, state management, Impeller renderer, platform-adaptive design Use when this capability is needed. - Skill: `tomevault-io/flutter` (Agent Skill, multi-file: 2 files) - Install (CLI): `npx skillmds@latest add tomevault-io/flutter` - Raw SKILL.md: https://api.skillmd.com/api/skills/tomevault-io/flutter/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/flutter --- # flutter **Layer 2 — Framework Pack** Flutter patterns for modern development (3.x+). Widget architecture, state management, Impeller renderer, platform-adaptive design, and the common mistakes agents make from outdated tutorials. ## Philosophy Flutter's "everything is a widget" model is simultaneously its greatest strength and the main source of agent mistakes. Agents build monolithic widget trees with thousands of lines, misuse `setState` for everything, nest widgets 15 levels deep, and ignore the widget lifecycle. This pack establishes clean widget architecture, proper state management selection, and Impeller-era performance patterns. ## What's Included | Type | Files | Coverage | |------|-------|----------| | Patterns | 7 | Widget architecture, state management, async/data, navigation, platform-adaptive, testing, performance | | Anti-patterns | 5 | God widgets, setState everywhere, ignoring dispose, hardcoded dimensions, unnecessary packages | | Constitution | 1 | 5 Flutter-specific principles | | Gate | 1 | Flutter pattern compliance check | --- > Source: [xoai/sage](https://github.com/xoai/sage) — distributed by [TomeVault](https://tomevault.io).