FAILURE MAP
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Incremental rebuild decision: Recipe changes reuse obsolete outputs · case 05

Recipe changes reuse obsolete outputs.

Member previewVariant 5 · 3 implementations · 32 checks per implementation

Case contract

Rebuild if output absent, content digest changed, tool changed, recipe changed, or a prerequisite failed; timestamps alone are irrelevant.

Why this case matters

An offline model of incremental rebuild decision, 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 fixtureActualExpectedOutcome
fixture 19falsetrueFailed

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

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