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make uv an optional dependency Move `uv` from required dependencies to an optional `[uv]` extra. When uv package is not available, behavior depends on the feature: 1. `install_packages()` / `ainstall_packages()` in `_internal/installation.py`: - Falls back to pip with a deprecation warning - This maintains existing behavior (pip fallback was always there) 2. Bundle features in `_experimental/bundles/__init__.py`: - Falls back to system `uv` binary (assumes uv is in PATH) with deprecation warning - NO pip fallback here because `uv pip freeze --exclude-editable` has no pip equivalent - Docker base image includes `/bin/uv` so this works for containerized deployments This addresses #17850 where users on platforms without pre-built uv wheels (requiring Rust toolchain) or wanting smaller container images can now use Prefect without the uv Python package dependency. Closes #17850 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
nate/make-uv-optional
13 hours ago

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make uv an optional dependency
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13 hours ago
#19668
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#19586
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