hatch: changelog & breaking changes

Auto-tracked from github.com/pypa/hatch. Updated Jul 06, 2026.

hatchling-v1.30.1

2026-06-02

✓ No breaking changes detected — looks safe to upgrade.

hatch-v1.17.0

2026-06-02
âš  Breaking changes
  • The hatch fmt command is now deprecated in favor of the new hatch check command group
  • Migrate HTTP client from httpx to httpx2

hatch-v1.16.5

2026-02-27
âš  Breaking changes
  • Handle a breaking change in virtualenv by only supporting the latest version and adding python-discovery as a dependency.

hatchling-v1.29.0

2026-02-23
âš  Breaking changes
  • Source Date Epoch no longer fails when set to date before 1980.

hatch-v1.16.4

2026-02-23

✓ No breaking changes detected — looks safe to upgrade.

hatch-v1.16.3

2026-01-21

✓ No breaking changes detected — looks safe to upgrade.

hatch-v1.16.2

2025-12-06
âš  Breaking changes
  • Fix regression where environments no longer acknowledged the project.optional-dependencies field

hatchling-v1.28.0

2025-11-27
âš  Breaking changes
  • Drop support for Python 3.9
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