skillify

Invoke Create mode with a request like "create a skill for X" and provide at least three concrete trigger prompts. The workflow drafts kebab-case frontmatter, a numbered workflow, an output contract, and validates the result with quick_validate.py and check_links.py.

Use Compress mode by asking to "shrink this skill" or "reduce token cost". It moves long examples and variant-specific guidance into one-level-deep reference files, replaces them with pointers, and stops when SKILL.md is under 350 lines and 5,000 tokens.

Yes, the compatibility field covers claude-code, codex, copilot, gemini, and antigravity. Adapt mode translates platform-specific frontmatter fields and folder locations, and the platforms/ directory contains per-host install instructions.

Descriptions fail when they exceed 1024 characters, contain XML angle brackets, or lack trigger language such as "Use when" or "Triggers on". Names must also be lowercase kebab-case under 64 characters and match the folder name.

Split when the description needs more than two unrelated "and" clauses or the skill handles multiple distinct responsibilities. Split mode clusters tasks by dominant user intent, proposes new names and negative triggers, and validates each resulting folder.