Features - CRUX

01

Causal blame

Ask about a behavior and get the commit. Not a build. A behavior.

Minimized diffs

The change shrinks to its essential lines. The real cause survives. The noise does not.

Interaction faults

Two commits pass alone. Merged they break the build. CRUX names the pair.

Ranked honesty

Ambiguous causes come ranked with the evidence for each candidate. You decide the tie.

02

Dependency-transitive blame

Your code stayed clean. The library under you changed. CRUX blames the library.

Environmental honesty

The config moved. Not the code. CRUX separates the two.

History rewrite proof

Rebases and squashes change nothing. CRUX blames the original commit not the wrapper.

03

Watch mode

Declare golden behaviors. CRUX watches every PR and flags drift with the blame attached.

Prediction

Feed CRUX a PR and it lists which behaviors will change. Before merge. Before breakage.

Reproducible findings

Every report replays in a sealed world. Same input. Same seed. Same output.

04

What CRUX is not

Not a debugger

It answers one question. It will not step through your code.

Not a linter

It does not judge your style. It does not care about your smells.

Not a CI runner

It reads history and behavior. That is the whole job.

One question runs the whole product. Which commit changed this behavior. If a feature does not serve that question it does not ship.

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