internal/

Package astcache holds the long-lived index caches (Phase 2 of docs/mcp-server-plan.md) plus the by-name call-graph index they populate.

Package cerr holds the semantic error classification shared by the gorefactor CLI and its importable refactoring engines.

Package goload holds the AST / type / package-loading helpers shared by the gorefactor CLI and its importable refactoring engines (refactor/extract, refactor/changesig).