E.15:4.1 - Recover the actual change

1. Name the predecessor, candidate, question, and receiving use. Use exact editions or recoverable source values. Add a ClaimScope, ReferenceScheme, model-use structure, or other qualifier only when the receiving use depends on it.
2. Read the changed passage in both wholes. Inspect enough of each pattern to recover the passage’s function, not only its changed tokens.
3. Describe the actual practitioner effect. Ask separately whether the change alters recognition or entry, required inputs, the first or later action, applicability or stop conditions, returned result, normative claims, ontology, dependent uses, or assurance needed for reliance.
4. Classify only after that comparison. Use the smallest Delta-Class that matches the observed effect in §4.3. The planned label, commit subject, or amount of changed text is evidence to inspect, not the answer.

Keep wording, examples, informative rationale, normative conditions, and public naming distinct; changing one does not silently change the others. Keep ClaimScope and WorkScope distinct when both are current.

If an exact predecessor value needed for this comparison is unavailable, return that bounded continuity gap. Do not reconstruct it from a later edition, a title, or a remembered summary.