26.6.0

Enhancements

• Add a new build_repodata_subset: Callable | None parameter to
  LibMambaSolver, allowing conda to provide sharded repodata instead of
  hosting the implementation in this project. The implementation in
  conda-libmamba-solver has been removed. (#908)

Bug fixes

• Fix an error when the verbosity level from conda is set higher than 4. (#948 via #949)
• Do not allow package downgrades when running conda update (#976)

Deprecations

• Remove requests, zstandard dependencies; network access, shards are
  delegated to conda. (#812)
• Require conda >=26.5 (#908)
• Remove CONDA_PLUGINS_USE_SHARDED_REPODATA/plugins.use_sharded_repodata
  setting. conda provides a repodata_use_shards (default True) setting
  instead. (#908)

Docs

• Replace sharded repodata documentation with link to conda developer guide. (#974)

Other

• Add libmambapy != 2.6.2 to run_constrained dependencies. (#959)
• Enable infrastructure-managed Dependabot configuration via conda/infrastructure templates. (#969)
• Remove temporary CI workarounds that deselected upstream tests and stripped Anaconda auth/telemetry plugins from base. (#977)
• Replace the vendored xprocess-based HTTP test server with conda's http_test_server fixture. Isolate the token-in-default_channels test in a subprocess so its localhost channel URL no longer leaks into later tests' default_channels. (#978)

Contributors

• @danyeaw
• @dholth
• @jaimergp
• @soapy1
• @conda-bot
• @dependabot[bot]
• @pre-commit-ci[bot]

Full Changelog: https://github.com/conda/conda-libmamba-solver/blob/main/CHANGELOG.md#2660-2026-06-30
All Changes: 26.4.2...26.6.0