#A.6.B:1 — Problem frame

Preface node heading:a-6-b-1-problem-frame:8773

#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

Boundary descriptions routinely collapse four distinct claim families into “contract soup”: definitions are written as obligations, runtime gates are hidden inside laws, governance talk is assigned to “the interface”, and “guarantees” are asserted without any evidence story. The resulting boundary is brittle: substitution becomes unclear, and auditability becomes performative rather than adjudicable.

FPF already separates the necessary strata (Signature vs Mechanism, EntityOfConcern, Description episteme, and carrier, views under viewpoints). What is still needed is a single, reusable classification primitive that any boundary text can apply consistently and that other patterns can cite as a stable authoring module.

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