Markdown Became AI’s Instruction Language

A simple text format co‑created decades ago (Markdown) is now widely used to structure prompts, documentation, and instruction for large language models, making an old open‑format into a de facto control surface for modern AI. That means design decisions and conventions in small, community tools can have outsized downstream effects on how AI systems are developed, audited, and governed. — If lightweight open formats serve as the lingua franca for AI models, stewardship of those formats (licensing, defaults, provenance) becomes a tangible policy lever for transparency, safety, and platform power.