FPF Reference

    A.6.C:5.3 — Show (Episteme archetypes)

    Preface node heading:a-6-c-5-3-show-episteme-archetypes:9606

    What this page is

    This is generated FPF reference text from the specification preface or supporting sections. It helps interpret FPF; it is not FPF Reference product documentation.

    Methodology

    Use it to understand how the specification wants to be read, then return to a route, pattern, or work packet for active work. Cite generated IDs only when the wording changes the task decision.

    Content

    (C) Multiparty protocol boundary (behavioural and session-type motif)

    Draft wording: “The protocol guarantees progress. Participants must follow the sequence.”

    Unpack + classify:

    • Utterance: protocol description (could be a type spec or protocol spec plus explanatory views).
    • L: safety and progress properties as laws over the protocol model (truth-conditional, within the theory).
    • A: admissibility: when an interaction trace is considered valid or admissible (e.g., runtime checks; compilation checks; gating conditions for entering a session).
    • D: obligations on implementers or operators: implement the protocol; do not send messages outside the allowed state machine; publish conformance records if required.
    • E: evidence: message trace carriers, conformance test-run records, and audit trails for disputed interactions.

    (D) Socio-technical “SLA + audit trail” boundary

    Draft wording: “Provider shall respond within 4 hours for Severity‑1 incidents. Only Severity‑1 is covered. Evidence is provided by ticket logs.”

    Unpack + classify:

    • Promise content (service promise clause): responsiveness promise for a defined incident class and window.
    • Utterance: SLA publication (and its views for different audiences).
    • A: admissibility predicate for the promise: ticket qualifies iff severity classification meets stated conditions.
    • D: provider commitment to meet the target; client duties (e.g., provide required info); auditor duties if applicable.
    • E: evidence: ticket carriers, timestamps, classification records, and the measurement procedure binding “4 hours” to a time window and clock source.

    Last Updated: 2026-06-17 — upstream FPF commit 646b0b9b (github.com/ailev/FPF)