Installs the official flutter/skills and dart-lang/skills packs into
app/.agents/skills/ and appends Flutter's AI rules.md to CLAUDE.md, so
Claude Code has task-specific playbooks alongside the dart MCP server
(registered separately at user scope).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013NqCvrbFnoNNmqCwZKntBK
