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Composition-aware keyboard commands: Escape clears the draft before cancellation handling · case 04

Escape clears the draft before cancellation handling.

Member previewVariant 4 · 3 implementations · 13 checks per implementation

Case contract

Composition state or legacy code 229 delegates to native input; plain multiline Enter inserts newline; other Enter submits; Escape preserves draft; Tab honors Shift.

Why this case matters

A deterministic model of composition-aware keyboard commands; 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
escape	`["cancel", ""]`	`["cancel", "draft"]`	Failed

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