# Recent Changes

## User-facing Changes

For recent changes in lint's set of features affecting users
of lint, see [](usage/changes.md.html).

## Lint API Changes

For recent changes in lint's internals affecting authors of
lint checks, see [](api-guide/changes.md.html).

## Documentation Changes

2022/06/29: Added documentation on how to write error messages, and fixed a bug
  which had left chapters 7-11 missing from the api-guide (the chapters on
  partial analysis, the dataflow analyzer, annotations and options).

2021/07/12: Documentation for the testing infrastructure test modes

2021/06/02: Documentation for the data flow analyzer and Gradle DSL

2021/03/29: Various updates
  Added separate user and API guides, added a chapter on performance
  tuning, added a section on how to unpublish a lint check, and a few
  other edits here and there.

2021/03/15: Initial version.

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