Changelog 0.3.x

0.3.0

This release introduces the uv project, tool, script, and python interfaces. If you've been following uv's development, you've probably seen these new commands behind a preview flag. Now, the interfaces are stable and ready for production-use.

These features are all documented in new, comprehensive documentation.

This release also stabilizes preview functionality in uv venv:

uv venv --python <version> will automatically download the Python version if required
uv venv will read the required Python version from the .python-version file or pyproject.toml

The uv pip interface should not be affected by any breaking changes.

Note the following changelog entries does not include all the new features since they were added incrementally as preview features. See the feature page in the documentation for a comprehensive listing, or read the blog post for more context on the new features.

Breaking changes

Migrate to XDG and Linux strategy for macOS directories (#5806)
Move concurrency settings to top-level (#4257)
Apply system Python filtering to executable name requests (#4309)
Remove --legacy-setup-py command-line argument (#4255)
Stabilize preview features (#6166)

Enhancements

Add 32-bit Windows target (#6252)
Add support for python_version in ... markers (#6172)
Allow user to constrain supported lock environments (#6210)
Lift requirement that .egg-info filenames must include version (#6179)
Change "any of" to "all of" in error messages (#6222)
Collapse redundant dependency clauses enumerating available versions (#6160)
Collapse unavailable packages in resolver errors (#6154)
Fix messages for unavailable packages when range is plural (#6221)
Improve resolver error messages when --offline is used (#6156)
Avoid overwriting dependencies with different markers in uv add (#6010)
Simplify available package version ranges when the name includes markers or extras (#6162)
Simplify version ranges reported for unavailable packages (#6155)
Rename environment-markers to resolution-markers (#6240)
Support uv add -r requirements.txt (#6005)

CLI

Hide global options in uv generate-shell-completion (#6170)
Show generate-shell-completion command in uv help (#6180)
Special-case reinstalls in environment update summaries (#6243)
Add output when uv add and uv remove update scripts (#6231)
Add support for package@latest in tool run (#6138)
Show python find output with -q (#6256)
Warn when --upgrade is passed to tool run (#6140)

Configuration

Allow customizing the tool install directory with UV_TOOL_BIN_DIR (#6207)

Performance

Use FxHash in uv-auth (#6149)

Bug fixes

Avoid panicking when the resolver thread encounters a closed channel (#6182)
Respect release-only semantics of python_full_version when constructing markers (#6171)
Tolerate missing [project] table in uv venv (#6178)
Avoid using workspace lock_path as relative root (#6157)

Documentation

Preview changes are now included in the standard changelog (#6259)
Document dynamic metadata behavior for cache (#5993)
Document the effect of ordering on package priority (#6211)
Make some edits to the workspace concept documentation (#6223)
Update environment variables doc (#5994)
Disable collapsible navigation in the documentation (#5674)
Document uv add and uv remove behavior with markers (#6163)
Document the Python installation directory (#6227)
Document the uv.pip section semantics (#6225)
Document the cache directory (#6229)
Document the tools directory (#6228)
Document yanked packages caveat during sync (#6219)
Link to persistent configuration options in Python versions document (#6226)
Link to the projects concept from the dependencies concept (#6224)
Improvements to the Docker installation guide (#6216)
Increase the size of navigation entries (#6233)
Install ca-certificates in docker and use pipefail (#6208)
Add script support to feature highlights in index (#6251)
Show uv generate-shell-completion in CLI documentation reference (#6146)
Update Docker guide for projects (#6217)
Use uv add --script in guide (#6215)
Show pinned version example on in GitHub Actions integration guide (#6234)

0.3.1

Enhancements

Add --with-editable support to uv run (#6262)
Respect .python-version files and pyproject.toml in uv python find (#6369)
Allow manylinux compatibility override via _manylinux module (#6039)

CLI

Avoid treating uv add -r as --raw-sources (#6287)

Bug fixes

Always invoke found interpreter when uv run python is used (#6363)
Avoid adding extra newline for script with non-empty prelude (#6366)
Fix metadata cache instability for lockfile (#6332)
Handle Ctrl-C properly in uvx invocations (#6346)
Ignore workspace discovery errors with --no-workspace (#6328)
Invalidate uv.lock when virtual dev-dependencies change (#6291)
Make cache robust to removed archives (#6284)
Preserve Git username for SSH dependencies (#6335)
Respect --no-build-isolation in uv add (#6368)
Respect .python-version files in uv run outside projects (#6361)
Use sys_executable for uv run invocations (#6354)
Use atomic write for pip compile output (#6274)
Use consistent logic for deserializing short revisions (#6341)

Documentation

Remove the preview default value of python-preference (#6301)
Update env vars doc about XDG_* variables on macOS (#6337)

0.3.2

Configuration

Add support for configuring python-downloads with UV_PYTHON_DOWNLOADS (#6436)
Add support for configuring the python-preference with UV_PYTHON_PREFERENCE (#6432)
Deny invalid members in workspace schema (#6450)

Performance

Stop streaming wheels when METADATA is discovered (if range requests aren't supported) (#6470)

Bug fixes

Remove URI type from JSON Schema (#6449)
Fix retrieval of credentials for URLs from cache (#6452)
Restore cache suffix on Windows cache path (#6482)
Treat .pyw files as scripts in uv run on Windows (#6453)
Treat invalid extras as false in marker evaluation (#6395)
Avoid overwriting symlinks in pip compile output (#6487)

Documentation

Add uv run hint to the uvx guide (#6454)
Add a guide for using uv with FastAPI (#6401)
Add tip for using managed = false to disable project management (#6465)
Clarify the uv tool run, uvx, and uv run relationships (#6455)
Fix references to --python-downloads (it is --no-python-downloads) (#6439)
Further clarifications to the tools documentation (#6474)
Update docs dockerfile (bullseye -> bookworm) (#6441)
Update the installation documentation page (#6468)
Update pip compatibility pages to mention configuration files support (#6410)
Add uv run docs for gui scripts (#6478)

0.3.3

Enhancements

Add uv sync --no-install-project to skip installation of the project (#6538)
Add uv sync --no-install-workspace to skip installation of all workspace members (#6539)
Add uv sync --no-install-package to skip installation of specific packages (#6540)
Show previous version in self update message (#6473)

CLI

Add --no-project alias for uv python pin --no-workspace (#6514)
Ignore .python-version files in uv venv with --no-config (#6513)
Include virtual environment interpreters in uv python find (#6521)
Respect - as stdin channel for uv run (#6481)
Revert changes to pyproject.toml when sync fails during uv add (#6526)

Configuration

Add UV_COMPILE_BYTECODE environment variable (#6530)

Bug fixes

Set VIRTUAL_ENV for uv run invocations (#6543)
Ignore errors in workspace discovery with --no-project (#6554)

Documentation

Add documentation for uv python find (#6527)
Add uv tool install example in Docker (#6547)
Document why we do lower bounds (#6516)
Fix to miss string termination in PowerShell commands for shell autocompletion documentation (#6491)
Fix incorrect workspace members keyword (#6502)
Use proper environment variables for Windows (#6433)
Improve caveat in uvx note (#6546)

0.3.4

CLI

Show --editable on the uv add CLI (#6608)
Add --refresh to tool run warning for --with dependencies (#6609)

Bug fixes

Allow per dependency build isolation for setup.py-based projects (#6517)
Avoid un-strict syncing by-default for build isolation (#6606)
Respect --no-build-isolation-package in uv sync (#6605)
Respect extras and markers on virtual dev dependencies (#6620)
Support PEP 723 scripts in GUI files (#6611)
Update lockfile after setting minimum bounds in uv add (#6618)
Use relative paths for --find-links and local registries (#6566)
Use separate types to represent raw vs. resolver markers (#6646)
Parse wheels WHEEL and METADATA files as email messages (#6616)
Support unquoted hrefs in --find-links and other HTML sources (#6622)
Don't canonicalize paths to user requirements (#6560)

Documentation

Add FastAPI guide to overview (#6603)
Add docs for disabling build isolation with uv sync (#6607)
Add example of reading script from stdin using echo (#6567)
Add tip to use intermediate layers in Docker builds (#6650)
Clarify need to include pyproject.toml with --no-install-project (#6581)
Move WORKDIR directive in Docker examples (#6652)
Remove duplicate WORKDIR directive in Docker example (#6651)

0.3.5

Enhancements

Add support for --allow-insecure-host (aliased to --trusted-host) (#6591)
Read requirements from requires.txt when available (#6655)
Respect tool.uv.environments in pip compile --universal (#6663)
Use relative paths by default in uv add (#6686)
Improve messages for empty solves and installs (#6588)

Bug fixes

Avoid reusing state across tool upgrades (#6660)
Detect musl and error for musl Python builds (#6643)
Ignore send errors in installer (#6667)

Documentation

Add development section to Docker guide and reference new example project (#6666)
Add docs for constraint-dependencies and override-dependencies (#6596)
Clarify package priority order in pip compatibility guide (#6619)
Fix docs for disabling build isolation with uv sync (#6674)
Improve consistency of directory lookup instructions in Docker (#6665)
Improve lockfile concept documentation, add coverage for upgrades (#6698)
Shift the order of some of the Docker guide content (#6664)
Use python to highlight requirements and use more content tabs (#6549)