tools/sage-claude-plugin/skills/mobile/SKILL.md
Universal mobile development principles — offline-first, 60fps, touch, battery, platform patterns
npx skillsauth add xoai/sage mobileInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
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Layer 1 — Domain Foundation
Universal mobile development principles that apply to every mobile project regardless of framework. React Native, Flutter, Swift, Kotlin — these hold.
Mobile is not "web on a small screen." The constraints are fundamentally different: unreliable networks, limited battery, touch as primary input, platform-specific user expectations, background/foreground lifecycle, and physical device variations from $80 phones to $1500 flagships.
This pack encodes the mobile-specific principles that agents consistently miss when applying web-first thinking to mobile development.
| Type | Files | Coverage | |------|-------|----------| | Patterns | 7 | Offline-first, performance/60fps, touch & gestures, navigation, lifecycle, responsive layout, platform conventions | | Anti-patterns | 5 | Web-first thinking, blocking main thread, ignoring lifecycle, hardcoded dimensions, permission spam | | Constitution | 1 | 6 non-negotiable mobile principles |
react-native, flutter)backend)development
Branch-per-initiative git discipline for all delivery workflows. Defines branch naming by workflow, the propose-confirm creation protocol, dirty-tree and detached-HEAD handling, the always user-gated merge protocol, worktree support for parallel sessions, and abandonment cleanup. Activates only in git repositories — silently inactive everywhere else. Use when starting /build, /fix, /architect, or /build-x at Standard+ scope, when resuming an initiative, when offering a merge at a completion checkpoint, or when the user wants a second concurrent initiative.
development
Drives task-by-task execution from an approved plan with quality gates between each task. Reads the plan, finds the next incomplete task, dispatches implementation, validates, updates progress, and continues. Use after a plan is approved and the user says "go", "start building", "execute the plan", or "implement the feature".
testing
Preserves and restores context across agent sessions using plan file checkboxes as source of truth. Use when starting a new session, resuming previous work, ending a session, or when the user says "continue from last time", "what was I doing", or "save progress".
tools
Captures agent mistakes, corrections, and discovered gotchas so they are not repeated. Use when: (1) a command or operation fails unexpectedly, (2) the user corrects the agent, (3) the agent discovers non-obvious behavior through debugging, (4) an API or tool behaves differently than expected, (5) a better approach is found for a recurring task. Also searches past learnings before starting tasks to avoid known pitfalls. Activate alongside the sage-memory skill — they share the same MCP backend but serve different purposes (sage-memory = codebase knowledge, sage-self-learning = agent mistakes and gotchas).