Version 2.9.0

What's Changed

Features:

• Support for boost-histogram 1.6, drop support for Python 3.8, boost-histogram < 1.5, add support for Python 3.14/3.14t #597 #618, #631
• Support serialization with boost-histogram 1.6 #627
• Add legend=True for plot1d stacked #622
• Specify license with SPDX, add some authors #625, #628

Fixes:

• Handle fill-flattened for non-user args #612
• Handle string args for fill-flattened #629
• Label/name propagation fixed for casting histograms #630

Tests:

• Handle tests that need mplhep #604
• Modernize noxfile #623
• Use dependency-groups #624

CI:

• Upload nightly wheels to Anaconda #611
• Add pass job to tests #619
• Modernize pylint and uv #629
• Update and check the minimum versions in CI #621
• Speed up read-the-docs #576

New Contributors

• @APN-Pucky made their first contribution in #604
• @aknierim made their first contribution in #614
• @Jammf made their first contribution in #612
• @Copilot made their first contribution in #622

Full Changelog: v2.8.1...v2.9.0