s34-documentation-writing

Generate comprehensive project documentation including technical specs, user flows, beginner-friendly usage guides, and README files. Use when the user says "write docs", "create documentation", "add README", "user guide", "technical spec", "usage instructions", "how to use this", "explain for beginners", "write a userflow", "onboarding docs", or explicitly invokes /documentation-writing. Covers four documentation types: (1) Technical — architecture, APIs, data models, infrastructure for engineers; (2) User Flow — step-by-step journey maps, interaction sequences, decision trees; (3) Usage Instructions — plain-language guides for non-technical users, screenshots-first; (4) README — project overview, quickstart, badges, contributing guide. Produces Markdown artifacts in docs/ or project root. Callable at ANY phase.