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Form dirty-field bookkeeping: Typing rewrites the baseline instead of the draft · case 03

Typing rewrites the baseline instead of the draft.

Member previewVariant 3 · 3 implementations · 10 checks per implementation

Case contract

Edits change draft only; reset restores baseline; commit accepts draft; unmount removal clears both; dirty comparison includes additions and removals.

Why this case matters

A deterministic model of form dirty-field bookkeeping; this isolates one interface invariant without requiring a browser.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
edit	`[{"a": 2}, {"a": 1}, ["a"]]`	`[{"a": 1}, {"a": 2}, ["a"]]`	Failed

MEMBER ARCHIVE

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This record includes three runnable implementations, regression fixtures, execution results, and source hashes.

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