Local indexer + watch mode
AST + embeddings on-device, with incremental updates as files change.
What gets indexed
CodeFathom captures definitions, references, imports/exports, and embeddings so retrieval stays code-aware instead of keyword-only.
Incremental watch mode
File watchers update only the modules that changed, keeping the index fresh without full rebuilds.
Output budgets and chunking
Chunks align to functions and classes, and retrieval respects token budgets so the plan stays in the prompt.