Module diff 

Semantic diff between two git refs at the symbol level.

Instead of a line diff, this compares the extracted symbol graphs of two git tree-states and classifies each change as Added / Removed / BodyChanged / SignatureChanged. The caller supplies a project root and two git refs (e.g. “HEAD~1”, “main”); the module checks out each ref into a temp worktree, indexes it with the current language registry, and returns a structured SymbolDiff.

Structs

SymbolChange

A single symbol-level change.

SymbolDiff

Full semantic diff result.

Enums

ChangeKind

How a symbol changed between two refs.

Functions

format_diff

semantic_diff

Compute a symbol-level diff between old_ref and new_ref in project_root.