For AI agents

Exercises are configured entirely through URL query params on /app, so an AI assistant can build a custom drill as a single link. These machine-readable references teach it how:

• /help/params.md

  URL params as plaintext Markdown — paste-able into any chatbot.

• /help/params.json

  The same spec as structured JSON, for tool / function-calling agents.

• /help/recipes.md

  A cookbook mapping teacher-language tasks to ready-to-open exercise URLs.

• /llms.txt

  The llms.txt index that points AI crawlers at all of the above.