Versioning

Fixes to lint rules, formatting layouts, etc. might prevent your scripts from passing. Due to the nature of these changes, it's highly recommended to save the exact version in your package.json, instead of using range operators.

This methodology will make sure that your script won't fail unexpectedly.

Semantic Versioning

Biome follows semantic versioning. Due to the nature of Biome as a toolchain, it can be unclear what changes are considered major, minor, or patch. That's why Biome uses the following versioning guide:

Patch Release

• Fixing a lint rule that raises lint errors for valid code (false positives)
• Fixing incorrect code suggestions
• Fixing the formatting of a syntax that results in invalid code or changes the semantics of the program.
• Improvements to the documentation
• Internal changes that don't change Biome's functionality:
  • Refactors
  • Performance improvements
  • Increase or change in test coverage
• Improving the wording of diagnostics or fixing the rendering of diagnostics.
• Re-releases after a failed release
• Changing the formatting of established syntax.

Minor Release

• Adding a new rule or promoting an existing lint rule to a stable group that is not recommended by default.
• Adding linting and formatting support for a recently introduced language feature, even if that results in more reported linting errors.
• Removal of recommended rules
• Deprecation of existing rules
• Adding new configuration optional configuration options that do not change the formatting or report more lint errors.
• Adding a new recommended lint rule or promoting an existing lint rule from the nursery group to a recommended lint rule in a stable group.
• Removal of a non-nursery rule or demoting a rule to the nursery group.

Major Release

• Changes to the configuration that result in different formatting or more reported lint errors (adding/removing options, changing the default value)
• Changes to Biome's public API
• Promotion of new features or tools that require some spotlight

Visual Studio Code Extension

Visual Studio Code doesn't support pre-release tags for extensions. That's why Biome uses the following version schema to distinguish stable and previews:

• Stable releases use even version numbers: 10, 12, 14, 16, ...
• Previews use odd version numbers: 11, 13, 15, 17, ...

Why pinning the version is important

Pinning the version of Biome in your package.json is important to ensure that every team member and CI environments use the same version of Biome. Even patch releases can result in slightly different formatting or linting results.