Module syntax 

Tree-sitter foundation shared by highlighting, scope context, and the structural diff. Grammars are statically linked (no runtime loading, since musl-static binaries cannot dlopen); a parse failure or unknown language degrades silently to plain behavior so the UI is never blocked.

Re-exports

pub use registry::HIGHLIGHT_NAMES;

pub use registry::LangEntry;

pub use registry::LanguageRegistry;

pub use scope::ScopeIndex;

pub use symbols::Ident;

Modules

intraline

Char-precise intra-line change emphasis driven by an AST diff (syndiff), the structural counterpart to the textual engine in crate::pairing. Only the byte ranges that differ structurally are emphasized, so a reformatted or re-wrapped block highlights just the tokens that changed.

registry

Language registry: maps a file path to its tree-sitter grammar, a configured highlight configuration, and (where the grammar ships one) a tags query used for scope/definition lookup. Built once and reused.

scope

“What are we inside of”: the chain of enclosing definitions (function, class, method, …) for a line, derived from a grammar’s tags query. The result is plain data so the diff worker can compute it once and share it.

symbols

The names a file uses, as its parse tree sees them: every identifier by line and byte range, so a reader can follow one name through a change.