flexcompute · daquinteroflex · Jul 26, 2025 · Jul 11, 2025 · Jul 30, 2025 · Jul 29, 2025
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -7,6 +7,15 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Changed
+- Validate mode solver object for large number of grid points on the modal plane.
+
+### Fixed
+- Fixed missing amplitude factor and handling of negative normal direction case when making adjoint sources from `DiffractionMonitor`.
+- Improved the robustness of batch jobs. The batch state, including all `task_ids`, is now saved to `batch.hdf5` immediately after upload. This fixes an issue where an interrupted batch (e.g., due to a kernel crash or network loss) would be unrecoverable.
+- Fixed warning for running symmetric adjoint simulations by port to not trigger when there is a single port.
+- Bug in `CoaxialLumpedPort` where source injection is off when the `normal_axis` is not `z`.
+
 ## [2.9.0] - 2025-08-04
 
 ### Added

diff --git a/docs/api/index.rst b/docs/api/index.rst
@@ -23,6 +23,7 @@ API |:computer:|
     output_data
     scene
     logging
+    utilities
     submit_simulations
     mesh/index
     heat/index
@@ -37,6 +38,7 @@ API |:computer:|
     viz
 
 .. include:: /api/simulation.rst
+.. include:: /api/utilities.rst
 .. include:: /api/boundary_conditions.rst
 .. include:: /api/geometry.rst
 .. include:: /api/mediums.rst
@@ -62,4 +64,4 @@ API |:computer:|
 .. include:: /api/constants.rst
 .. include:: /api/abstract_base.rst
 .. include:: /api/abstract_models.rst
-.. include:: /api/viz.rst
+.. include:: /api/viz.rst
diff --git a/docs/api/simulation.rst b/docs/api/simulation.rst
@@ -8,4 +8,3 @@ Simulation
    :template: module.rst
 
    tidy3d.Simulation
-   tidy3d.RunTimeSpec
diff --git a/docs/api/utilities.rst b/docs/api/utilities.rst
@@ -0,0 +1,14 @@
+.. currentmodule:: tidy3d
+
+Utilities
+=========
+
+.. autosummary::
+   :toctree: _autosummary/
+   :template: module.rst
+
+   tidy3d.RunTimeSpec
+   tidy3d.FreqRange
+   tidy3d.FrequencyUtils
+   tidy3d.frequencies
+   tidy3d.wavelengths
diff --git a/tests/test_components/test_autograd_mode_polyslab_numerical.py b/tests/test_components/test_autograd_mode_polyslab_numerical.py
@@ -457,7 +457,7 @@ def eval_fn(sim_data):
     fd_mag = np.linalg.norm(fd_grad)
     adj_mag = np.linalg.norm(pattern_dot_adj_gradient)
     percentage_error = 100.0 * np.mean(
-        (fd_grad - pattern_dot_adj_gradient) / (fd_grad + np.finfo(np.float64).eps)
+        np.abs(fd_grad - pattern_dot_adj_gradient) / (np.abs(fd_grad) + np.finfo(np.float64).eps)
     )
 
     print("\n" * 3)

diff --git a/tests/test_components/test_autograd_numerical.py b/tests/test_components/test_autograd_numerical.py
@@ -333,7 +333,7 @@ def test_finite_difference_field_data(field_data_test_parameters, rng, tmp_path,
     fd_mag = np.linalg.norm(fd_grad)
     adj_mag = np.linalg.norm(pattern_dot_adj_gradient)
     percentage_error = 100.0 * np.mean(
-        (fd_grad - pattern_dot_adj_gradient) / (fd_grad + np.finfo(np.float64).eps)
+        np.abs(fd_grad - pattern_dot_adj_gradient) / (np.abs(fd_grad) + np.finfo(np.float64).eps)
     )
 
     print("\n" * 3)
Original file line number	Diff line number	Diff line change
Expand Up		@@ -8,4 +8,3 @@ Simulation
		:template: module.rst

		tidy3d.Simulation
		tidy3d.RunTimeSpec