PencilPlaybook is the UI Skills / Taste-Skill for Pencil.dev + Claude Code — a design playbook that gives Claude real perceptual psychology and senior-level guardrails so it stops producing averaged-out AI slop.

Claude Code skill for naming products, SaaS, and brands. Metaphor-driven naming that avoids AI slop.

Open-source Agent Skill that scores AI-sounding writing 0–100, edits it with your assistant.