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UI/UX design intelligence. 50 styles, 21 palettes, 50 font pairings, 20 charts, 9 stacks.

Write comprehensive XML-structured project specifications for software projects. Use when a user wants to create a build plan, project spec, technical specification, or detailed requirements document for an application they want built. Triggers include requests like "write a project spec", "create a build plan", "make a technical specification", "spec out this app idea", "write requirements for my project", or any request to produce a structured document describing what to build. Also use when refining or expanding an existing spec. The output is an XML-formatted .md file optimized for consumption by AI coding agents (e.g., Claude Code, Cursor, Copilot Workspace) or human developers.