Changelog¶

Release history from GitHub Releases.

0.8.0¶

Released 2026-10-22. View release.

What's Changed¶

New Features¶

docs(palace): add chip junction inductors and eigenmode field plots #407
docs(fdtd): use built-in arbitrary grating coupler in the GPDK example #414
feat(palace): warn when via merging grows the via area #412
feat(palace): warn when a wave-port mode solve jumps (port-mode continuity check) #410
feat(palace): default to configurable complex MUMPS multigrid #376
feat: send FDTD and Palace sizing without an SDK upgrade #344
feat(tcad): DEVSIM charge-transport backend configured by physical concern #370
feat(palace): electrostatic terminals by connected net or region #359
feat(palace): modal-to-terminal transformation for multi-conductor wave ports #345
feat(fdtd): add notebook field-monitor helper #371
feat(palace): symmetry planes for half-model driven and eigenmode simulations #338
feat(palace): native-2D BoundaryModeSim owns its run, paths and fields #350
feat(fdtd): support directional domain padding #349

Bug Fixes¶

fix(fdtd): contain disconnected sidewalls in the physical domain #418
fix(palace): detect connected conductor necks and notches #384
fix(cloud): record an uploaded job before starting it #390
fix(palace): write BoundaryMode material tensors in the 2D mesh frame #409
fix(palace): remove fixed node-count performance warning #405
fix(palace): restore executable permissions for MPI launchers #404
fix(cloud): surface sizing rejections and Palace OOM guidance #403
fix: stabilize FDTD counts and bound Palace AMR sizing #402
fix(stack): preserve YAML sidewall angles #401
fix(palace): report effective mesh sizing in diagnostics #382
fix(palace): honor layout database units in Gmsh geometry #383
fix(tcad): load scipy-openblas32 natively with DEVSIM 2.11.1 #387
fix: read gmsh meshes without a blank line per read; restore a palace export #374
fix(fdtd): warn when material dispersion is dropped; opt-in dispersion blocks #369
fix(fdtd): keep background LayerLevels that have no source polygons #367
fix(palace): reject ports outside the meshed domain before upload #366
fix(meep): report stopping mode as info, quiet the Xvfb fallback #365
fix(gcloud): keep the cloud progress bar from going backwards #364
fix(fdtd): write grid.non_pml_bounds to config.json #363
fix(fdtd): write mesh.msh and config.json with LF line endings #362
fix(palace): keep R/L/C of non-excited lumped ports in driven sims #355

Refactoring¶

refactor(palace): move the local launch into palace.runtime #391
refactor(palace): declare shared simulation state once #392

Maintenance¶

docs(palace): publish a large QPDK qubit chip demo #386
docs: automate API references and release changelog #351

Documentation¶

docs: add Codecov coverage badge to README and docs home #368
docs(palace): which Gmsh settings give the same mesh, and comparing mesh hashes #361
docs(nbs): move the CPW de-embedding legend below the panels #352

Other changes¶

test(tcad): draw the diode regions directly, not from cached cells #416
test: expand solver, geometry, and cloud coverage #373
Add asymmetric finite-ground CPW airbridge example #263

Full Changelog: https://github.com/gdsfactory/gsim/compare/0.7.0...0.8.0

0.7.0¶

Released 2026-10-09. View release.

What's Changed¶

New Features¶

feat(stack): import layer stacks from EMX process files #343
feat(palace): expose wave-port boundary policy #313
feat(palace): report solver and mode-validation evidence #317
docs(palace): use scikit-rf for transmission-line calibration #319
feat(palace): expose the Gmsh 3D algorithm and thread counts #290
feat(palace): find the electrical nets of a layout #289

Bug Fixes¶

fix(materials): silicon refractive index in the O-band (Li 1980) #346
fix(palace): derive Floquet phase from the actual mesh period #314
fix(palace): read eigenmode fields and exact-zero S parameters #315
docs: set an eigenmode target in the QPDK two-qubit meshing notebook #326
fix(mesh): ignore the user's Gmsh options file #329
fix(palace): clarify launch errors and exclude slow transmon docs notebook #324
fix(ci): install qpdk 0.4.0 for the QPDK resonator docs notebook #325
fix(palace): export valid transient solver settings #308
fix(palace): validate problem targets and fallback configs #307
fix(palace): align field saves with frequency samples #305

Refactoring¶

refactor(palace): group solver settings under sim.solver #331

Maintenance¶

ci: limit docs notebook execution to 30 minutes #333

Documentation¶

docs(palace): physical RLGC in the CPW de-embedding notebook (joint fit with impedance anchors) #342

Other changes¶

chore(deps): bump pdk-schema to 0.3.0 #347
test(palace): cover field cycles across MFEM versions #281
Circuit parameter extraction refactor #321
Palace transmon eigenmode notebook (conflicts resolved) #327
chore: update default code owners #328

Full Changelog: https://github.com/gdsfactory/gsim/compare/0.6.0...0.7.0

0.6.0¶

Released 2026-09-30. View release.

What's Changed¶

New Features¶

feat(palace): read and check the capacitance matrices of an electrostatic run #288
feat(palace): record a mesh hash and the Gmsh settings in the mesh stats #287
feat(palace): report Field DOF estimates and export mesh metadata #297
feat(palace): read the per-pass output of adaptive mesh refinement #286
feat(palace): show worst element distortion in mesh summaries #294
feat(palace): expose adaptive mesh refinement controls #285
feat(palace): report elements per region in mesh stats #284
Add Palace domain energy and port contact helpers #282
feat(palace): expose Palace's advanced wave-port eigensolver controls #253
feat(palace): clarify lumped port geometries #261
feat(palace): add PN-junction models and BoundaryMode ports #268

Bug Fixes¶

fix: support pdk-schema 0.2 analytic material cards #309
fix(palace): correct numerical solver exports #304
fix(palace): export sample counts for logarithmic sweeps #299
fix(palace): apply the airbox lateral margin once, not twice #279
fix(palace): clip GPDK wave ports to the meshed airbox #270
fix(meep): repair explicit bounds integration #260

Documentation¶

docs: add QPDK two-qubit Palace meshing notebook #295
docs: display Palace mesh summary in lumped CPW notebook #280
docs: simplify CPW examples and add de-embedding and mode comparisons #271
docs: restore the CPW wave-port tutorial #269
docs(palace): validate IHP cmim against PDK compact model + fix MIM meshing #235

Other changes¶

test(palace): pin the mesh-size options the stats fixtures rely on #296
[WIP] Adding new RF components from IHP PDK #167
Use effective indices in the 2D meep notebook, not bulk ones #254
Incorporate palace binary downloader #233

Full Changelog: https://github.com/gdsfactory/gsim/compare/0.5.0...0.6.0

0.5.0¶

Released 2026-09-15. View release.

What's Changed¶

New Features¶

feat(meep): support explicit xy bounds #258
feat: expand optical material library #255
feat(palace): emit WavePortPEC for numeric wave ports #251
feat: add simulation notebooks for new RF components #237
feat: show progress bar while waiting for cloud simulations #248
feat: improve FDTD geometry viewer #244
feat: establish GDSFactory FDTD as primary photonic engine #243
feat(fdtd): loft angled sidewalls #241
feat: add geometry-aware FDTD mesh sizing #239
feat: add ergonomic FDTD cloud workflow #238

Bug Fixes¶

fix(meep): resolve port geometry per layer #259

Documentation¶

Other changes¶

docs cleanup #252
chore: remove generated simulation output #240
perf(ci): execute only changed notebooks on pull requests #236
chore(nbs): drop ubcpdk, use generic PDK #234

Full Changelog: https://github.com/gdsfactory/gsim/compare/0.4.0...0.5.0

0.4.0¶

Released 2026-08-19. View release.

What's Changed¶

New Features¶

feat: run documentation notebooks in CI #224
feat: extend Meep background dielectrics into PML #223
feat: add Meep refractive index plots #222
feat: add PDK-native GDSFactory FDTD artifact generation #216
feat: add auto aspect to MEEP 2D plots #218
feat: add explicit MEEP Z bounds #219
feat: add canonical PDK resolver #214

Bug Fixes¶

2D TW-MZM cross-section with PN junction and CPW electrodes #232
fix(stack): remove synthetic passivation and align Meep 2D backgrounds #231
fix: hide vertices in interactive 2D plots #221
fix: prevent MEEP derived layer aliasing #220
fix: report cloud jobs that fail before start #217

Maintenance¶

Documentation¶

Other changes¶

fix: surface cache-lookup and failed-job diagnostics #226
test: migrate cloud fixtures to z bounds #229

Full Changelog: https://github.com/gdsfactory/gsim/compare/0.3.0...0.4.0

0.3.0¶

Released 2026-08-13. View release.

What's Changed¶

New Features¶

feat: add built-in MaterialCards #212

Bug Fixes¶

Fix XZ geometry export and preview #213
fix: add PyPI package description #209

Other changes¶

chore: enable tbump for releases #208

Full Changelog: https://github.com/gdsfactory/gsim/compare/0.2.0...0.3.0

0.2.0¶

Released 2026-08-12. View release.

What's Changed¶

New Features¶

feat(meep): orthogonal sim API — mode+cuts, domain.z_ref, per-axis margins #186

Bug Fixes¶

fix: support gdsfactoryplus 2 #204
fix(palace): omit BoundaryMode Target when set to auto #199
fix(palace): restore airbox in notebooks so absorbing BC is not on metal #200
fix(meep): repair mode-solver parity rejection test #194
docs: fix broken changelog and API reference links #188

Documentation¶

docs: fix mode-solver plot titles and add TFLN band diagram #198
docs: simplify eigenmode nav labels and de-emphasize solver in titles #197
docs: add Eigenmode Analysis section and fix mode-solver plot width #196
docs(meep): add mode solver notebooks to docs #195
docs(meep): add 2D grating-coupler wavelength-sweep notebook #187

Other changes¶

chore: require cache-enabled gdsfactoryplus #207
feat: derive cloud cache key from simulation inputs #206
Add RF transformer layout, Palace EM simulation, and Circulax parameter fit notebook #191
feat(meep): cloud eigenmode solver with context reconstruction #174
Fixed NaNs in visualization of surface fields and adopted PyVista #190

Full Changelog: https://github.com/gdsfactory/gsim/compare/0.1.0...0.2.0

0.1.0¶

Released 2026-07-06. View release.

What's Changed¶

New Features¶

feat(docs): add dark theme toggle and gdsfactory header link #177
feat(palace): electrostatic simulation end-to-end #146
fix(test): clean up PEC block test marks #142
Add cdaunt, flaport, and das-dias to CODEOWNERS #141
Add jupytext sync for notebook diffs #135

Bug Fixes¶

test: tighten cloud sim S-param tolerances to absolute 0.01 #178
fix(docs): run waveport on cloud and build width sweep notebook #170
fix(palace): restore air domain in CPW test fixtures via set_airbox #165
fix(meep): slice animation/diagnostics at core layer, not stack midpoint #164
fix(palace): correct metal_tags typing to satisfy ty #152
fix: replace run_local with run in notebooks, add inductor to docs #140
fix: reorder pyproject.toml sections to satisfy tombi-format #139
fix: force utf-8 on write_text so Windows cp1252 doesn't break output #127
fix: enforce cp1252 compatibility in Python sources #125

Maintenance¶

ci: add per-PR sim_smoke_test cloud check #160
ci: add Claude Code PR review workflows #159
test: add cloud simulation fixtures with cloud marker #128
ci: add Windows and macOS to test matrix #126

Documentation¶

docs: use explicit get_stack() from PDK in Palace notebooks #134

Other changes¶

Fix docs formulas and meshing plots rendering #185
Migrate docs from mkdocs to zensical #176
fix: case-insensitive material override and overlay matching (#163) #172
Add 2D Palace BoundaryMode solver support #150
feat(meep): add interactive Plotly 2D plots with layer toggle #157
feat(api): explicit Material with refractive_index support in notebooks and improve mesh refinement #155
Add RLC model fitting to inductor notebook #154
fix(palace): align PDK stack defaults #151
Curved-element meshing and Palace 3D photonics example #131
feat(mesh): decimate_tolerance, verbosity, and stale tag fix #145
feat: Simulation.run_local() for MEEP and sim fixes #144
feat: frequency-dependent material dispersion and API refactor #143
Add T-Bar CPW electrode MZM example (and supporting fixes/features) #129
Transmon qubit example with inductance port #110
Palace driven simulation for spiral inductor with guard ring #132
Update import path for apply_additive_metals #130
Relax gdsfactory version pin to >=9,<10 #124

Full Changelog: https://github.com/gdsfactory/gsim/compare/0.0.16...0.1.0

0.0.16¶

Released 2026-04-22. View release.

What's Changed¶

Bug Fixes¶

fix: replace Unicode arrow with ASCII for Windows compatibility #123

Documentation¶

Full Changelog: https://github.com/gdsfactory/gsim/compare/0.0.15...0.0.16

0.0.15¶

Released 2026-04-22. View release.

What's Changed¶

New Features¶

feat(meep): XZ 2D FDTD with fiber source and grating-coupler notebook #120

Documentation¶

Full Changelog: https://github.com/gdsfactory/gsim/compare/0.0.14...0.1.0

0.0.14¶

Released 2026-04-21. View release.

What's Changed¶

New Features¶

feat(palace): auto-size mesh, always refine ports, improve CPW defaults #111
feat: add 2D effective-index MEEP simulation mode #108
Add code coverage with Codecov #103
ci: add test workflow #101

Bug Fixes¶

fix: silence ty warnings in viz.py and rename 2D page to "2D FDTD" #118
fix(meep): log z_crop application instead of silently rewriting layers #116
fix(palace): auto-size mesh for all presets, detect CPW gap widths #114
fix(stack): respect PDK layer_type metadata in extract_layer_stack #105
fix(mesh): correctly re-identify conductor volumes after dedup and re… #104
fix: handle 403 Forbidden for accounts without cloud sim #99
fix: handle transient HTTP errors in job polling loop #98
fix: add nbformat dependency for plotly notebook rendering #97
fix: add nest_asyncio2 for PyVista trame in VS Code #95

Refactoring¶

refactor(palace): consolidate MeshConfig/MeshResult, drop pipeline.py #115
refactor(palace): drop graded preset and PEC refinement flag #113

Maintenance¶

Documentation¶

docs(meep): publish 2D effective-index notebook #117

Other changes¶

Add offset parameter to inplane and via ports. #106
Wave port #53
test: remove redundant tests, add workflow integration tests #102
Implement surface booleans via occ.cut() #79

Full Changelog: https://github.com/gdsfactory/gsim/compare/0.0.13...0.1.0

0.0.13¶

Released 2026-04-06. View release.

What's Changed¶

New Features¶

feat(meep): energy_decay stopping + fix OR condition bug #93
feat: add plot_interactive() to Palace SParams #89
add sparams_path #81
feat: add interactive Plotly S-parameter plotting #75

Bug Fixes¶

fix: use PLOTLY_RENDERER env var for interactive charts in CI #77
fix: render interactive Plotly charts on GitHub Pages #76

Refactoring¶

refactor: remove MPI process count from client API #92

Maintenance¶

ci: commit executed notebooks instead of running in CI #87
ci: make docs build manual-only and sequential #86

Documentation¶

docs: rebuild palace_qpdk_resonator notebook #91
chore: notebook cleanup, renames, and meep plot methods #90

Other changes¶

chore: pin gdsfactoryplus minimum version #94
deps: update gdsfactory to ~=9.39, unpin gdsfactoryplus #88
Add configurable verbosity to mesh generator, fix tests, refactor palace simulation classes and local non-Apptainer Palace support #49

Full Changelog: https://github.com/gdsfactory/gsim/compare/0.1.0...0.1.1

0.0.12¶

Released 2026-03-26. View release.

What's Changed¶

New Features¶

feat: add port name mapping to Palace S-parameter results #73

Full Changelog: https://github.com/gdsfactory/gsim/compare/0.0.11...0.1.0

0.0.11¶

Released 2026-03-25. View release.

What's Changed¶

New Features¶

feat: via volume meshing with fragment-based boolean pipeline #69

Bug Fixes¶

fix: revert Netgen meshing for via ports #71
fix: resolve type errors for ty 0.0.25 #70

Documentation¶

docs: split API reference into per-module pages #67
docs: add field viz to QPDK resonator notebook #66
docs: add field component plots to CPW field viz notebook #65
docs: Palace field visualization notebook #64

Maintenance¶

ci: allow pages deploy on workflow_dispatch #72

Full Changelog: https://github.com/gdsfactory/gsim/compare/0.0.10...0.0.11

0.0.10¶

Released 2026-03-20. View release.

What's Changed¶

New Features¶

feat: auto-label PRs for categorized release notes by @vvahidd in https://github.com/gdsfactory/gsim/pull/55
feat: add live log streaming for cloud simulation jobs by @vvahidd in https://github.com/gdsfactory/gsim/pull/59
feat: add PEC block support for Palace simulations by @vvahidd in https://github.com/gdsfactory/gsim/pull/60
feat: add field saving parameters for Palace simulations by @vvahidd in https://github.com/gdsfactory/gsim/pull/63

Bug Fixes¶

fix: cpw bug phase shift by @cdaunt in https://github.com/gdsfactory/gsim/pull/57

Documentation¶

docs: improve Palace config docstrings and notebook defaults by @vvahidd in https://github.com/gdsfactory/gsim/pull/62

Other Changes¶

better names for docs by @joamatab in https://github.com/gdsfactory/gsim/pull/58

New Contributors¶

@joamatab made their first contribution in https://github.com/gdsfactory/gsim/pull/58
@cdaunt made their first contribution in https://github.com/gdsfactory/gsim/pull/57

Full Changelog: https://github.com/gdsfactory/gsim/compare/0.0.9...0.0.10

0.0.9¶

Released 2026-03-18. View release.

What's Changed¶

Other Changes¶

feat: add auto-generated release notes by @vvahidd in https://github.com/gdsfactory/gsim/pull/47
fix: default CPW port length to 0.1 µm by @vvahidd in https://github.com/gdsfactory/gsim/pull/50
fix: add missing trame core package to dependencies by @vvahidd in https://github.com/gdsfactory/gsim/pull/51
fix: fuse overlapping same-layer surfaces before extrusion in Palace mesh by @vvahidd in https://github.com/gdsfactory/gsim/pull/54

Full Changelog: https://github.com/gdsfactory/gsim/compare/0.0.8...0.0.9

0.0.8¶

Released 2026-03-05. View release.

No release notes were published for this version.

0.0.6¶

Released 2026-02-24. View release.

No release notes were published for this version.

0.0.5¶

Released 2026-02-19. View release.

No release notes were published for this version.

0.0.4¶

Released 2026-02-05. View release.

No release notes were published for this version.

0.0.3¶

Released 2026-02-03. View release.

No release notes were published for this version.

0.0.2¶

Released 2026-01-24. View release.

No release notes were published for this version.

0.0.0¶

Released 2026-01-23. View release.

No release notes were published for this version.