FA-22807 / Autocomplete interactions / Member archive

Undoable autocomplete acceptance: redo appends completion text onto the old prefix · case 02

The redo-text completion transition produces an incorrect observable state.

Member previewVariant 2 · 3 implementations · 22 checks per implementation

Case contract

A completion acceptance is one undo transaction containing draft, committed identity and caret. Undo restores the pre-accept snapshot; redo restores the accepted snapshot. A subsequent edit discards redo, transient hover never enters the stack, and history snapshots own their data.

Why this case matters

Autocomplete couples draft text, suggestion identity and asynchronous presentation; this bounded lifecycle model isolates one observable interaction defect.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
normal redo-text	`"peapear"`	`"pear"`	Failed

MEMBER ARCHIVE

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

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