Drop Python 3.10/3.11 support, add Python 3.14

- Update requires-python to >=3.12, add 3.14 classifier
- Set Python 3.14 as default dev, typecheck, and docs version
- Remove py310/py311 pixi features, CI matrix entries, and environments
- Add py314 pixi feature and environments across linux, mac/win, nevergrad
- Remove test-old-pandas env (pandas <2 incompatible with Python 3.12+)
- Remove petsc4py upper bound pin (no 3.14 builds at <=3.23.4)
- Update ruff target-version to py312
- Update publish workflow and RTD config Python versions

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: timmens

.github/workflows/main.yml

@@ -18,10 +18,9 @@ jobs:
       fail-fast: false
       matrix:
         python-version:
-          - '310'
-          - '311'
           - '312'
           - '313'
+          - '314'
     steps:
       - uses: actions/checkout@v4
       - uses: prefix-dev/setup-pixi@v0.9.4
@@ -35,7 +34,7 @@ jobs:
         shell: bash -el {0}
         run: pixi run -e test-linux-py${{ matrix.python-version }} tests-with-cov
       - name: Upload coverage report.
-        if: matrix.python-version == '310'
+        if: matrix.python-version == '312'
         uses: codecov/codecov-action@v4
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
@@ -49,10 +48,9 @@ jobs:
           - macos-latest
           - windows-latest
         python-version:
-          - '310'
-          - '311'
           - '312'
           - '313'
+          - '314'
     steps:
       - uses: actions/checkout@v4
       - uses: prefix-dev/setup-pixi@v0.9.4
@@ -65,21 +63,6 @@ jobs:
       - name: Run pytest
         shell: bash -el {0}
         run: pixi run -e test-py${{ matrix.python-version }} tests-fast
-  run-tests-with-old-pandas:
-    name: Run tests on ubuntu-latest with pandas < 2
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - uses: prefix-dev/setup-pixi@v0.9.4
-        with:
-          pixi-version: v0.65.0
-          cache: true
-          cache-write: ${{ github.event_name == 'push' && github.ref_name == 'main' }}
-          frozen: true
-          environments: test-old-pandas
-      - name: Run pytest
-        shell: bash -el {0}
-        run: pixi run -e test-old-pandas tests-fast
   run-tests-with-old-numpy:
     name: Run tests on ubuntu-latest with numpy < 2
     runs-on: ubuntu-latest
@@ -117,10 +100,9 @@ jobs:
       fail-fast: false
       matrix:
         python-version:
-          - '310'
-          - '311'
           - '312'
           - '313'
+          - '314'
     steps:
       - uses: actions/checkout@v4
       - uses: prefix-dev/setup-pixi@v0.9.4
@@ -146,11 +128,11 @@ jobs:
           cache: true
           cache-write: ${{ github.event_name == 'push' && github.ref_name == 'main' }}
           frozen: true
-          environments: test-linux-py312
+          environments: test-linux-py314
       - name: Run doctest
         shell: bash -el {0}
         run: >-
-          pixi run -e test-linux-py312
+          pixi run -e test-linux-py314
           python -m doctest -v docs/source/how_to/how_to_constraints.md
   run-mypy:
     name: Run mypy

.github/workflows/publish-to-pypi.yml

@@ -7,10 +7,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - name: Set up Python 3.10
+      - name: Set up Python 3.12
         uses: actions/setup-python@v5
         with:
-          python-version: '3.10'
+          python-version: '3.12'
       - name: Install pypa/build
         run: >-
           python -m

.readthedocs.yml

@@ -3,7 +3,7 @@ version: 2
 build:
   os: ubuntu-24.04
   tools:
-    python: '3.12'
+    python: '3.14'
   jobs:
     create_environment:
       - asdf plugin add pixi

pyproject.toml

@@ -4,7 +4,7 @@
 [project]
 name = "optimagic"
 description = "Tools to solve difficult numerical optimization problems."
-requires-python = ">=3.10"
+requires-python = ">=3.12"
 dependencies = [
     "cloudpickle",
     "joblib",
@@ -40,10 +40,9 @@ classifiers = [
     "Operating System :: MacOS :: MacOS X",
     "Operating System :: Microsoft :: Windows",
     "Operating System :: POSIX",
-    "Programming Language :: Python :: 3.10",
-    "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: 3.13",
+    "Programming Language :: Python :: 3.14",
     "Topic :: Scientific/Engineering",
 ]
 authors = [
@@ -96,7 +95,7 @@ allow-direct-references = true
 # Ruff configuration
 # ======================================================================================
 [tool.ruff]
-target-version = "py310"
+target-version = "py312"
 fix = true
 
 [tool.ruff.lint]
@@ -403,7 +402,7 @@ platforms = ["linux-64", "osx-arm64", "win-64"]
 
 # --- Base dependencies (all environments) -------------------------------------------
 [tool.pixi.dependencies]
-python = ">=3.10,<3.14"
+python = ">=3.12,<3.15"
 # Prefer conda-forge builds for compiled scientific packages
 numpy = "*"
 scipy = ">=1.2.1"
@@ -436,14 +435,12 @@ gradient-free-optimizers = ">=1.6.0"
 pyswarms = "*"
 
 # --- Python version features --------------------------------------------------------
-[tool.pixi.feature.py310.dependencies]
-python = "~=3.10.0"
-[tool.pixi.feature.py311.dependencies]
-python = "~=3.11.0"
 [tool.pixi.feature.py312.dependencies]
 python = "~=3.12.0"
 [tool.pixi.feature.py313.dependencies]
 python = "~=3.13.0"
+[tool.pixi.feature.py314.dependencies]
+python = "~=3.14.0"
 
 # --- Feature: test (test infrastructure) ---------------------------------------------
 [tool.pixi.feature.test.dependencies]
@@ -475,7 +472,7 @@ mypy = "mypy"
 platforms = ["linux-64"]
 [tool.pixi.feature.linux.dependencies]
 jax = ">=0.4.1"
-petsc4py = "<=3.23.4"
+petsc4py = "*"
 
 # --- Feature: docs -------------------------------------------------------------------
 [tool.pixi.feature.docs.dependencies]
@@ -500,10 +497,6 @@ intersphinx-registry = "*"
 build-docs = { cmd = "make html", cwd = "docs" }
 
 # --- Compat features (version overrides for backward-compat CI) ---------------------
-[tool.pixi.feature.old-pandas.dependencies]
-numpy = "<2"
-pandas = "<2"
-
 [tool.pixi.feature.old-numpy.dependencies]
 numpy = "<2"
 pandas = ">=2"
@@ -520,28 +513,24 @@ nevergrad = "*"
 
 # --- Environments --------------------------------------------------------------------
 [tool.pixi.environments]
-# Default dev environment (Python 3.12, everything)
-default = { features = ["test", "py312"], solve-group = "py312" }
+# Default dev environment (Python 3.14, everything)
+default = { features = ["test", "py314"], solve-group = "py314" }
 # Linux CI (with JAX + PETSc)
-test-linux-py310 = { features = ["test", "linux", "py310"], solve-group = "linux-py310" }
-test-linux-py311 = { features = ["test", "linux", "py311"], solve-group = "linux-py311" }
 test-linux-py312 = { features = ["test", "linux", "py312"], solve-group = "linux-py312" }
 test-linux-py313 = { features = ["test", "linux", "py313"], solve-group = "linux-py313" }
+test-linux-py314 = { features = ["test", "linux", "py314"], solve-group = "linux-py314" }
 # macOS/Windows CI
-test-py310 = { features = ["test", "py310"], solve-group = "py310" }
-test-py311 = { features = ["test", "py311"], solve-group = "py311" }
 test-py312 = { features = ["test", "py312"], solve-group = "py312" }
 test-py313 = { features = ["test", "py313"], solve-group = "py313" }
-# Backward-compat CI (Python 3.10 only)
-test-old-pandas = { features = ["test", "old-pandas", "py310"] }
-test-old-numpy = { features = ["test", "old-numpy", "py310"] }
-test-old-plotly = { features = ["test", "old-plotly", "py310"] }
+test-py314 = { features = ["test", "py314"], solve-group = "py314" }
+# Backward-compat CI (Python 3.12, lowest supported)
+test-old-numpy = { features = ["test", "old-numpy", "py312"] }
+test-old-plotly = { features = ["test", "old-plotly", "py312"] }
 # Nevergrad CI (bayesian-optimization==1.4.0)
-test-nevergrad-py310 = { features = ["test", "nevergrad", "py310"] }
-test-nevergrad-py311 = { features = ["test", "nevergrad", "py311"] }
 test-nevergrad-py312 = { features = ["test", "nevergrad", "py312"] }
 test-nevergrad-py313 = { features = ["test", "nevergrad", "py313"] }
+test-nevergrad-py314 = { features = ["test", "nevergrad", "py314"] }
 # Type checking
-typecheck = { features = ["typecheck", "py310"], solve-group = "py310" }
+typecheck = { features = ["typecheck", "py314"], solve-group = "py314" }
 # Docs
-docs = { features = ["docs", "py312"], solve-group = "py312" }
+docs = { features = ["docs", "py314"], solve-group = "py314" }