# Concepts Core vocabulary: what a box, a card, and the engine are. - [cards.md](https://beebox.run/docs/concepts/cards.md): The card format: YAML frontmatter plus a markdown body. - [chat-schedules.md](https://beebox.run/docs/concepts/chat-schedules.md): Timers the agent sets from chat that fire later. - [connectors.md](https://beebox.run/docs/concepts/connectors.md): What a connector is: the sync boundary between an external service and the box filesystem. - [enriched-markdown.md](https://beebox.run/docs/concepts/enriched-markdown.md): Cards are markdown enriched in specific ways: a header that each kind of card extends, and a body with a small baseline of cross-cutting marks (quote, source, todo) that any card can use. - [glossary.md](https://beebox.run/docs/concepts/glossary.md): Bee Box terms, one line each. - [landmarks.md](https://beebox.run/docs/concepts/landmarks.md): Landmarks: the short curated navigation surface over a box. - [model-policy.md](https://beebox.run/docs/concepts/model-policy.md): Which engine (Claude Code or Codex) and which model tier a box thinks with. - [procedures.md](https://beebox.run/docs/concepts/procedures.md): Procedures: multi-step workflows expressed as cards and run by the engine. - [questions.md](https://beebox.run/docs/concepts/questions.md): The questions subsystem: how the agent asks, where answers go, and what they change. - [triage.md](https://beebox.run/docs/concepts/triage.md): The intake pipeline: how an inbox item is classified, filed, or turned into a question.