Package fastwalk provides a faster version of filepath.Walk for file system scanning tools.

Package span contains support for representing with positions and ranges in text files.

Package stack provides support for parsing standard goroutine stack traces.

Package testenv contains helper functions for skipping tests based on which tools are present in the environment.

Package tool is a harness for writing Go tools.

Package typeparams provides functions to work indirectly with type parameter data stored in go/ast and go/types objects, while these API are guarded by a build constraint.

Package typesinternal provides access to internal go/types APIs that are not yet exported.

Package xcontext is a package to offer the extra functionality we need from contexts that is not available from the standard context package.