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Deprecated option alias migration: Deprecated aliases override canonical settings · case 05

Deprecated aliases override canonical settings.

Member previewVariant 5 · 3 implementations · 7 checks per implementation

Case contract

Copy canonical values; map alias values only when canonical is absent, remove alias keys, preserve unrelated options, and report conflicts where alias and canonical differ.

Why this case matters

An offline model of deprecated option alias migration, suitable for testing build and release tooling without external services.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
fixture 3	`[{"new": 1}, ["new"]]`	`[{"new": 2}, ["new"]]`	Failed

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

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