Issues

• Xpress missing _license_probe: licensed_solvers includes xpress with an out-of-date licence, breaking local tests

  bugsolver interface
  PyPSA/linopy#994 · Filter by author FabianHofmann opened on Sep 28, 2026

• spec: rows emptied by absence are dropped silently; revisit strict refusal

  discussionmath-spec
  PyPSA/linopy#993 · Filter by author FabianHofmann opened on Sep 28, 2026
  2

• Tracking: sparse/CSR path follow-ups after #961

  performancesparse
  PyPSA/linopy#972 · Filter by author FabianHofmann opened on Sep 23, 2026

• Document the sparse expression path (CSRLinearExpression, sparse=True, sparse_groupby)

  documentationsparse
  PyPSA/linopy#971 · Filter by author FabianHofmann opened on Sep 22, 2026

• Make the sparse path observable and controllable (.is_sparse, densify warning, per-call sparse=)

  enhancementsparse
  PyPSA/linopy#969 · Filter by author FabianHofmann opened on Sep 22, 2026

• add_piecewise_formulation use case: snapshot-dimensioned breakpoints (PyPSA/PyPSA#1914)

  enhancementmodel formulation
  PyPSA/linopy#953 · Filter by author MaykThewessen opened on Sep 10, 2026

• Mosek output not shown in console when log_fn is set

  bugsolver interface
  PyPSA/linopy#948 · Filter by author mgrabovsky opened on Sep 8, 2026

• Zero culling forces model rebuilding

  bugdata-modelperformance
  PyPSA/linopy#925 · Filter by author olivier-lacroix opened on Sep 4, 2026
  1

• spec: grouped operators crash on string labels under pandas 3.0 (ArrowStringArray)

  bugmath-spec
  PyPSA/linopy#924 · Filter by author FabianHofmann opened on Sep 4, 2026

• Math-spec integration

  enhancementmath-spec
  PyPSA/linopy#919 · Filter by author FabianHofmann opened on Sep 3, 2026
  2

• Add LazyExpresssions

  data-modelenhancementmath-spec
  PyPSA/linopy#888 · Filter by author brynpickering opened on Aug 12, 2026

• Move to mkdocs (or equivalent) for docs

  documentation
  PyPSA/linopy#873 · Filter by author brynpickering opened on Jul 27, 2026 · Post v1
  3

• Plan: v1 semantics community discussion (open after #717 merges)

  discussionmodel formulationv1
  PyPSA/linopy#857 · Filter by author FBumann opened on Jul 20, 2026

• Remove legacy semantics at linopy 1.0 (Stage 3)

  model formulationrefactorv1
  PyPSA/linopy#846 · Filter by author FBumann opened on Jul 16, 2026 · Predictabe Semantics: Arithmetics, Broadcasting, Joining, Absence

• Make v1 the default arithmetic convention (Stage 2)

  enhancementmodel formulationv1
  PyPSA/linopy#845 · Filter by author FBumann opened on Jul 16, 2026 · Predictabe Semantics: Arithmetics, Broadcasting, Joining, Absence

• CodSpeed regression: highspy 1.15.0 addRows ~4x slower in direct HiGHS handoff (#809 bump)

  bugdependenciesperformancesolver interface
  PyPSA/linopy#813 · Filter by author FBumann opened on Jul 2, 2026

• Add Variable.reindex (mirroring LinearExpression.reindex)

  data-modelenhancement
  PyPSA/linopy#800 · Filter by author FabianHofmann opened on Jun 30, 2026
  2

• Add a mask parameter to add_piecewise_formulation

  enhancementmodel formulation
  Feature

  PyPSA/linopy#799 · Filter by author FBumann opened on Jun 29, 2026

• Design: Model.restrict / advance — slice a model along a coordinate and condition on boundary values (rolling horizon)

  data-modeldiscussionenhancementperformance
  PyPSA/linopy#768 · Filter by author FabianHofmann opened on Jun 7, 2026
  10

• Split dev-facing extras into PEP 735 dependency groups (and the pip ≥ 25.1 implication)

  dependenciesrefactor
  PyPSA/linopy#763 · Filter by author FBumann opened on Jun 5, 2026

• groupby-sum pads every group to the largest group size

  data-modelenhancementperformance
  PyPSA/linopy#745 · Filter by author FBumann opened on Jun 3, 2026 · Resolve Memory issues in sparse models
  1

• Tighten type hints on add_variables / add_constraints / add_objective

  data-modelrefactor
  PyPSA/linopy#734 · Filter by author FBumann opened on May 27, 2026
  1

• Variable.update() / Constraint.update() should validate inputs the same way add_variables() / add_constraints() do

  data-modelenhancement
  PyPSA/linopy#731 · Filter by author FBumann opened on May 27, 2026

• Opt-in allocator arena release after Model.solve() to bound RSS across sequential solves

  enhancementperformance
  PyPSA/linopy#720 · Filter by author MaykThewessen opened on May 21, 2026
  3

• Extend xarray method coverage on Variable / LinearExpression

  data-modeldiscussionenhancement
  PyPSA/linopy#703 · Filter by author FBumann opened on May 20, 2026 · Predictabe Semantics: Arithmetics, Broadcasting, Joining, Absence
  4