What Is a Semantic Diff?
A semantic diff compares two versions of code, a schema, or structured data based on their structure and meaning instead of line-by-line text. It treats whitespace changes, reordering, or formatting as no-ops while surfacing genuine differences like a removed field. This produces a diff aligned with what actually changed in behavior.
Why it matters
A semantic diff cuts noise from reviews and powers accurate breaking-change and compatibility checks. It distinguishes a cosmetic edit from one that alters a contract.
Related guides
What Is Breaking Change Detection?Breaking change detection is automated analysis that compares a change against a prior version to flag modifi…
What Is Snapshot Approval?Snapshot approval is reviewing and accepting a changed test snapshot, confirming the new output is intended b…
What Is a Visual Baseline?A visual baseline is the stored reference screenshot that visual regression tests compare new renders against…