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## Summary The release pipeline's two \`uv pip install dist/*.whl\` calls fail when the released package depends on a langgraph alpha that itself has transitive prerelease deps. uv's default \`if-necessary-or-explicit\` mode allows prereleases for first-party explicit markers (the wheel's own deps) but rejects transitive ones, so the install fails on the wheel — even when the wheel itself names an explicit prerelease for the immediate dependency. Add a workflow input \`allow-prereleases\` (default \`false\`, on both \`workflow_call\` and \`workflow_dispatch\` triggers). When true, both install steps pass \`--prerelease=allow\`. When false (the default), behavior is unchanged. The existing \`check_prerelease_dependencies.py\` step still gates stable releases against accidentally-pinned prerelease deps.