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Learn

Learn covers the reference Python runtime — how Foundation Protocol works on the wire, in process, and in storage. If you want to understand how an FP message gets from Alice to Bob, what runs between them, and what state the runtime keeps along the way, you're in the right place.

For build-and-ship recipes, see Develop. For the trade and arbitration layer, see Trade & Trust.

What's in this section

  • Checkpoint Pipeline

    The ordered policy chain every inbound message walks before reaching a handler. The runtime's primary trust and governance seam.

  • Mail

    The signed envelope every message travels in. Routing, signing, optional encryption, and the seven-state lifecycle from sent to done.

  • Message

    The business payload inside the envelope. MessageKind, payload types, and how Mail and Message divide responsibility.

  • Carbon Copy

    How an entity's owner observes the conversations of every entity they own — outbound and inbound copies, deduplicated by original message id.