scratch-coding-skills

Build a Scratch program from a user prompt using vibe coding, then distill the novel techniques into a new reusable SKILL.md. Use this skill when you want to grow the skills collection with a new pattern discovered during live coding.

Spawn an autonomous sub-agent that implements a test Scratch program using only a newly written skill, then reports whether the skill's documentation is accurate, complete, and sufficient to produce working code.

Pattern for coordinating pen drawing across multiple sprites. Uses a stage-based broadcast to ensure "pen clear" runs once before all sprites begin drawing, preventing partial erasure.

Pattern for storytelling with sequential dialog (message chaining) and simultaneous speech (parallel broadcast). Combines backdrop switching with broadcast messages to create multi-scene conversations between characters.