Validation cleanup — delete error_handling.py and validation.py

.github/workflows/main.yml

@@ -26,9 +26,9 @@ jobs:
           - '3.14'
     steps:
       - uses: actions/checkout@v6
-      - uses: prefix-dev/setup-pixi@v0.9.5
+      - uses: prefix-dev/setup-pixi@v0.9.6
         with:
-          pixi-version: v0.68.1
+          pixi-version: v0.69.0
           cache: true
           cache-write: ${{ github.event_name == 'push' && github.ref_name == 'main' }}
           environments: tests-cpu
@@ -57,9 +57,9 @@ jobs:
           - '3.14'
     steps:
       - uses: actions/checkout@v6
-      - uses: prefix-dev/setup-pixi@v0.9.5
+      - uses: prefix-dev/setup-pixi@v0.9.6
         with:
-          pixi-version: v0.68.1
+          pixi-version: v0.69.0
           cache: true
           cache-write: ${{ github.event_name == 'push' && github.ref_name == 'main' }}
           environments: type-checking
@@ -80,9 +80,9 @@ jobs:
           nvidia-smi
           nvcc --version || echo "nvcc not found"
       - uses: actions/checkout@v6
-      - uses: prefix-dev/setup-pixi@v0.9.5
+      - uses: prefix-dev/setup-pixi@v0.9.6
         with:
-          pixi-version: v0.68.1
+          pixi-version: v0.69.0
           cache: true
           cache-write: ${{ github.event_name == 'push' && github.ref_name == 'main' }}
           environments: tests-cuda12
@@ -99,9 +99,9 @@ jobs:
           nvidia-smi
           nvcc --version || echo "nvcc not found"
       - uses: actions/checkout@v6
-      - uses: prefix-dev/setup-pixi@v0.9.5
+      - uses: prefix-dev/setup-pixi@v0.9.6
         with:
-          pixi-version: v0.68.1
+          pixi-version: v0.69.0
           cache: true
           cache-write: ${{ github.event_name == 'push' && github.ref_name == 'main' }}
           environments: tests-cuda12
@@ -114,9 +114,9 @@ jobs:
   #   runs-on: ubuntu-latest
   #   steps:
   #     - uses: actions/checkout@v6
-  #     - uses: prefix-dev/setup-pixi@v0.9.5
+  #     - uses: prefix-dev/setup-pixi@v0.9.6
   #       with:
-  #         pixi-version: v0.68.1
+  #         pixi-version: v0.69.0
   #         cache: true
   #         cache-write: ${{ github.event_name == 'push' && github.ref_name == 'main' }}
   #         environments: tests-cpu

.pre-commit-config.yaml

@@ -5,7 +5,7 @@ repos:
       - id: check-hooks-apply
       - id: check-useless-excludes
   - repo: https://github.com/tox-dev/pyproject-fmt
-    rev: v2.21.1
+    rev: v2.21.2
     hooks:
       - id: pyproject-fmt
   - repo: https://github.com/lyz-code/yamlfix
@@ -54,7 +54,7 @@ repos:
     hooks:
       - id: check-github-workflows
   - repo: https://github.com/astral-sh/ruff-pre-commit
-    rev: v0.15.12
+    rev: v0.15.14
     hooks:
       - id: ruff-check
         args:

docs/user_guide/pandas_interop.md

@@ -172,10 +172,10 @@ def is_good_health(health: DiscreteState) -> IntND:
     return jnp.int32(health == Health.good)
 ```
 
-## Validating Transition Probabilities
+## Validating State Transition Probabilities
 
-Check that a transition probability array has the correct shape, values in $[0, 1]$, and
-rows that sum to 1:
+Check that a state transition probability array has the correct shape, values in
+$[0, 1]$, and rows that sum to 1:
 
 ```python
 from lcm import validate_transition_probs
@@ -197,6 +197,9 @@ Raises `ValueError` if:
 
 Call this after building the array to catch mistakes early.
 
+Regime transition probabilities are validated automatically during `model.solve()` and
+`model.simulate()`, so this helper covers only state transitions.
+
 ## Under the Hood
 
 Internally, `solve()` and `simulate()` call `convert_series_in_params` (in

src/lcm/__init__.py

@@ -68,9 +68,12 @@
     _bind_forward_refs as _bind_persistence_forward_refs,
 )
 from lcm.simulation.result import SimulationResult  # noqa: E402
-from lcm.user_regime import MarkovTransition, Regime  # noqa: E402
+from lcm.user_regime import (  # noqa: E402
+    MarkovTransition,
+    Regime,
+    validate_transition_probs,
+)
 from lcm.utils.containers import invert_regime_ids  # noqa: E402
-from lcm.utils.error_handling import validate_transition_probs  # noqa: E402
 from lcm.variables import (  # noqa: E402
     _bind_forward_refs as _bind_variables_forward_refs,
 )