FA-54182 / Accessibility interaction semantics / Member archive

Zero-width annotations are exposed as text spans · case 02

Zero-width annotations are exposed as text spans.

Member previewVariant 2 · 3 implementations · 7 checks per implementation

Case contract

Input [length,annotations,types] annotations [id,start,end,kind,detail,resolved]. Admit allowed types and unresolved annotations with nonempty detail. Clamp half-open ranges, discard empty or reversed. Preserve overlapping annotations; dedupe same ID by first eligible record. Output sorted by start,end,ID. Return [id,start,end,kind,detail]. Spelling, grammar, comment are the only recognized kinds even if types requests unknown types.

Why this case matters

Offline accessibility bridge model with explicit policy; useful for testing semantic API adapters independently of browser implementations.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
contract fixture 4	`[["a", 0, 0, "comment", "zero"]]`	`[]`	Failed

MEMBER ARCHIVE

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

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