v46.8.1

46.8.1

🐛 Bug Fixes

• Skip material-merge clash check for single-child stacks (#5576)

v46.8.0

46.8.0

🚀 Features

• Has material fix in detray converter (#5511) by @asalzburger
• Introduce GBL as a new plugin for ACTS (#5501) by @chrishanw
• Adding gen1 - gen3 - (detray) - geant4 propagation (#5514) by @asalzburger
• Fix in detray for loglevel change (#5518) by @asalzburger
• Add appending of track states to tracks in PyACTS bindings (#5422) by @H4m5t3r
• Space point performance writer for Examples (#5486) by @andiwand
• Initial Arrow conversion and parquet output (#5410) by @paulgessinger
• IAxis gains AxisDirection (#5540) by @andiwand
• AnyOf polymorphic value (#5542) by @paulgessinger
• Add MMG/EdgeLayerConnector for GNN track building (#5539) by @benjaminhuth
• Augment portal merge failures with context (#5548) by @paulgessinger
• Add option to set the propagator max step in Geant4 if needed (#5559) by @pbutti
• Enable reading of detector files for detray in Examples (#5561) by @asalzburger

🐛 Bug Fixes

• Deprecate material lookup based on global coordinates (#5413) by @asalzburger
• Bugs in the record_propagation function (#5516) by @niermann999
• Fix timed clusterization with duplicate cells (#4762) by @DJDuque
• Circumvent symbol visibility issues with templated final classes (#5547) by @andiwand
• Revise zero-charge q/p (#5420) by @andiwand
• Replacing Gen3 onLayer/onContainer can wrap (#5549) by @paulgessinger
• Spatial grid accelerator intersection (#5558) by @niermann999
• Faulty access to position with index (#5564) by @paulgessinger
• Make onLayer change backward compatible (#5563) by @paulgessinger
• Surface double counting in the object tracer (#5565) by @niermann999
• Add formatting as a cmdl option (#5570) by @niermann999
• Prevent dangling bfield reference in record propagation function (#5566) by @niermann999
• Set link artifacts CompositePortalLink for Cylinder and Discs as well (#5573) by @asalzburger
• Arrow-related clang-tidy issues (#5574) by @paulgessinger

📚 Documentation

• Add CODEOWNERS file (#5375) by @stephenswat
• Cleanup Axis documentation (#5533) by @andiwand

🛠️ Build

• Separate covfie setup from traccc (#5512) by @stephenswat
• (detray) Add CMake external include guards (#5513) by @stephenswat
• (deps) Bump https://github.com/BlankSpruce/gersemi-pre-commit from 0.27.6 to 0.27.7 (#5525) by @dependabot[bot]
• VecMem Setup Fix, main branch (2026.05.29.) (#5519) by @krasznaa
• (deps) Bump actions/checkout from 5.0.1 to 6.0.2 (#5553) by @dependabot[bot]
• (deps) Bump actions/download-artifact from 4.3.0 to 8.0.1 (#5554) by @dependabot[bot]
• (deps) Bump pypa/cibuildwheel from 3.3.1 to 3.4.1 (#5555) by @dependabot[bot]
• (deps) Bump astral-sh/setup-uv from 7.6.0 to 8.1.0 (#5532) by @dependabot[bot]
• (deps) Bump actions/upload-artifact from 4.6.2 to 7.0.1 (#5552) by @dependabot[bot]

⚙️ Miscellaneous Tasks

• hasMaterial helper for surfaces and volumes (#5509) by @andiwand
• Automated python requirements upgrades (#5526) by @github-actions[bot]
• Clarify our understanding of CODEOWNERS in the README (#5520) by @asalzburger
• Harden GitHub Actions and enforce hash-pinning via zizmor (#5529) by @paulgessinger
• Allow return of references with template_switch (#5537) by @andiwand
• Add pypi deployment and nightly to main repo (#5528) by @benjaminhuth
• Extract IGrid into its own header (#5534) by @andiwand
• Extract NeighborHoodIndices into its own header (#5535) by @andiwand
• Cleanup Utilities source folder (#5538) by @andiwand
• Try to take ownership (#5522) by @AJPfleger
• Dependencies to 23.1.0 (#5550) by @goblirsc
• Cleanup geometry building examples (#5527) by @asalzburger
• Cleanup and move grid_helper.hpp to MultiAxisHelper.hpp (#5541) by @andiwand
• Revise interpolation implementation (#5543) by @andiwand
• Automated python requirements upgrades (#5556) by @github-actions[bot]
• Ownership for some stuff (#5568) by @benjaminhuth
• Turn on Arrow plugin in CI (#5557) by @paulgessinger
• Rm print_units_physical_constants.py (#5523) by @AJPfleger

v46.7.0

46.7.0

🚀 Features

• Geometric digitization with debugged drift, and correct threshold setting (#4169) by @asalzburger
• Improve Mille example (#5432) by @goblirsc
• Bind measurement subset to python (#5474) by @benjaminhuth
• Added correct handling of strip spacepoints to GBTS (#5456) by @jpreston-cern
• Detray geometry converter (and ODD tests) (#5449) by @asalzburger
• Bump traccc version (#5503) by @paradajzblond
• Support geometric (segmented) digitization on cylinder surfaces (#5493) by @altsybee

🐛 Bug Fixes

• GNN4ITk example + AthenaDumpWriter (#5468) by @benjaminhuth
• Track container resize dynamic columns if the column is created after tracks have been made (#5463) by @junggjo9
• Assign spacepoints in prototracks-to-seeds algorithm (#5485) by @benjaminhuth
• Adjust the name of the detray internal SVG display variable (#5470) by @niermann999
• Avoid use-after-free in Any copy assignment with type change (#5494) by @paulgessinger
• Don't mark Any copy operations noexcept (#5495) by @paulgessinger

🛠️ Build

• Allow ACTS to export detray targets (#5462) by @stephenswat
• Update traccc build (#5469) by @paradajzblond
• Covfie Configuration Fix, main branch (2026.05.20.) (#5473) by @krasznaa
• Find VDT quietly since it is not used anymore with ROOT 6.40 (#5491) by @jmcarcell
• (detray) Increase usability of detray build (#5502) by @stephenswat
• Toggle default off for covfie, detray, vecmem (#5504) by @andiwand
• (deps) Bump SonarSource/sonarqube-scan-action from 8.0.0 to 8.1.0 (#5505) by @dependabot[bot]
• (deps) Bump https://github.com/BlankSpruce/gersemi-pre-commit from 0.27.5 to 0.27.6 (#5506) by @dependabot[bot]
• (deps) Bump https://github.com/psf/black-pre-commit-mirror from 26.5.0 to 26.5.1 (#5507) by @dependabot[bot]

⚙️ Miscellaneous Tasks

• Run detray GitLab CI only for detray changes (#5472) by @stephenswat
• Exclude StrawLineFitterTest from debug build tests (#5489) by @andiwand
• Automated python requirements upgrades (#5508) by @github-actions[bot]

v46.6.0

46.6.0

🚀 Features

• Add ODD json roundtrip conversion (#5423) by @benjaminhuth
• Add parent id to existing SimParticle EDM (#5440) by @paulgessinger
• Adding beam spot as an additional measurement to refitting algorithm (#5342) by @delitez
• Add time covariance for core spacepoint (#5442) by @wangyanqi191025
• Make ScopedTimer threadsafe (#5439) by @paulgessinger
• Provide access to tangents from seed estimation function (#5437) by @andiwand
• Elevate strip space point calibration to public API (#5444) by @andiwand
• Bind measurement container to python (#5464) by @benjaminhuth
• Reference trajectory builder + Kalman-based fitter (#5400) by @andiwand
• Bind index-maps to python (#5465) by @benjaminhuth

🐛 Bug Fixes

• Expand the detray component label to the detray plugin (#5431) by @niermann999
• Explicitly include <DD4hep/Fields.h> from DD4hepFieldAdapter (#5443) by @veprbl
• Set strip half length vector in SpacePointMaker (#5445) by @andiwand
• Logic operator bug in propagator (#5452) by @niermann999
• Make JsonSurfacesWriter work with ConvexPolygonBounds (#5466) by @altsybee

🚜 Refactor

• (ci) Extract functions and variables in unused files check (#5397) by @AJPfleger
• Revise track parameter estimation implementation (#5436) by @andiwand
• (GNN) Use MMG library kernels instead of local copies (#5438) by @benjaminhuth
• Remove some dead code from the detray plugin (#5455) by @niermann999

📚 Documentation

• Add a favicon (#5415) by @AJPfleger

🛠️ Build

• (deps) Bump actions/checkout from 4 to 6 (#5426) by @dependabot[bot]
• (deps) Bump https://github.com/pre-commit/mirrors-clang-format from v22.1.4 to 22.1.5 (#5427) by @dependabot[bot]
• (deps) Bump https://github.com/psf/black-pre-commit-mirror from 26.3.1 to 26.5.0 (#5459) by @dependabot[bot]
• (deps) Bump https://github.com/BlankSpruce/gersemi-pre-commit from 0.27.4 to 0.27.5 (#5458) by @dependabot[bot]
• Enable DD4hep automatically if ODD is built (#5467) by @benjaminhuth

⚙️ Miscellaneous Tasks

• Bump dependencies to v23.0.0 (#5414) by @paulgessinger
• Deprecate broadly templated seed parameter estimation functions (#5451) by @andiwand
• Try fix merge sentinel for detray jobs (#5457) by @andiwand
• Trim lcg jobs (#5454) by @andiwand
• Remove some leftover copyright statements (#5453) by @niermann999
• Automated python requirements upgrades (#5460) by @github-actions[bot]

v46.5.0

46.5.0

🚀 Features

• Implement RiddersStepper (#5352) by @andiwand
• Add edm4hep tracker hit links to PODIO track container (#5354) by @paulgessinger
• Add Detray to ACTS (#5374) by @niermann999
• Iterative gauss fit for performance plots (#5417) by @andiwand
• Prefix for seeds and seeding performance writers for multi-pass tracking (#5409) by @altsybee

🐛 Bug Fixes

• Don't load GNN cmake dependencies in installation (#5412) by @benjaminhuth

🚜 Refactor

• Move of AdaptiveHT core codes to Core (#5403) by @tboldagh

⚡ Performance

• Speed up vertex conversion in EDM4hep sim input (#5407) by @paulgessinger

🛠️ Build

• Switch ODD source to GitHub (#5408) by @paulgessinger
• Use named args in add_examples_binding_if (#5398) by @paulgessinger
• (deps) Bump SonarSource/sonarqube-scan-action from 7.1.0 to 8.0.0 (#5405) by @dependabot[bot]
• (deps) Bump https://github.com/BlankSpruce/gersemi-pre-commit from 0.27.2 to 0.27.4 (#5428) by @dependabot[bot]

⚙️ Miscellaneous Tasks

• Add navigator concept (#5419) by @andiwand
• Add referenceFrame overload without position/direction for plane surfaces (#5416) by @andiwand
• Automated python requirements upgrades (#5406) by @github-actions[bot]
• Automated python requirements upgrades (#5429) by @github-actions[bot]
• Upgrade actions depending on node20 to newer versions (#5399) by @AJPfleger
• Some clang tidy fixes (#5425) by @andiwand

v46.4.0

46.4.0

🚀 Features

• Add TGeo based Gen3 building (+ demo with ODD) (#5350) by @paulgessinger
• Add elemental fractions to the material recording step (#5280) by @56laurenwills
• (Gnn) Enable runtime CPU/GPU choice + refactoring (#5347) by @benjaminhuth
• Tracking geometry json converter (#5336) by @ssdetlab
• GBTS create seeds from nodes (#5382) by @andiwand
• Serlializer for DiamondSurface / DiamondBounds (#5381) by @benjaminhuth
• Final set of changes for GBTSv3 (#5390) by @jpreston-cern
• Add support for multi-pass tracking (#5370) by @jburzy
• Stubgeneration for python bindings (#5383) by @benjaminhuth
• Serializer for multilayer navigation (#5380) by @benjaminhuth
• Add a cartesian space point grid (#5389) by @goblirsc

🐛 Bug Fixes

• Clear components during multi stepper initialization (#5364) by @andiwand
• Initialize Uproot readers correctly (#5371) by @benjaminhuth
• CloneablePtr - Assign cloner if object is assigned from unique_ptr (#5373) by @junggjo9
• Missing default constructor for geometry converter config (#5402) by @benjaminhuth

🚜 Refactor

• Logging and binding for geometry serialization (#5384) by @benjaminhuth
• Use stepper surface update in SurfaceReached aborter (#5386) by @andiwand

⚡ Performance

• (python) Implement buffered access in uproot based readers (#5379) by @diptaparna
• Better optimize cotTheta filter for strip seeding (#5395) by @mvessell96

🧪 Testing

• Add epsTime to propagation integration tests (#5388) by @andiwand
• Rework PropagatorTest actor (#5387) by @andiwand

🛠️ Build

• (deps) Bump aidasoft/run-lcg-view from 5 to 6 (#5365) by @dependabot[bot]
• (deps) Bump https://github.com/pre-commit/mirrors-clang-format from v22.1.3 to 22.1.4 (#5392) by @dependabot[bot]

⚙️ Miscellaneous Tasks

• Remove AlignedTelescopeDetector and default-align TelescopeDetector (#5369) by @goblirsc
• Remove setIdentityJacobian from stepper interface (#5356) by @andiwand
• Automated python requirements upgrades (#5367) by @github-actions[bot]
• (deps) Gersemi pre-commit hook repo reference (#5378) by @AJPfleger
• Version bump of Traccc, Detray and VecMem (#5376) by @paradajzblond
• Automated python requirements upgrades (#5393) by @github-actions[bot]
• Drop additionalFreeCovariance from StraightLineStepper (#5385) by @andiwand
• Bump cuda architectures (#5396) by @benjaminhuth

v46.3.0

46.3.0

🚀 Features

• Python bindings for SimHit/SimHitContainer + UprootReader (#5330) by @benjaminhuth
• Gen3 DD4hep construction (#5193) by @paulgessinger
• Add combinatoric indices utilitiy (#5344) by @junggjo9
• Demonstrator for MillePede alignment of ACTS Kalman tracks (#5256) by @goblirsc
• Make the usage of writeHelixParameters esier in python simulation example (#5360) by @avallier-cern
• Composable vertex position generators with event number (#5308) by @paulgessinger

🐛 Bug Fixes

• CompositeSpacePointLineFitter - Avoid FPE from sqrt (#5346) by @junggjo9
• Pass restrictToSensitives to functor (#5345) by @osbornjd
• Propagate edge features in edge classification modules (#5340) by @benjaminhuth
• Broken Link in README.md (#5357) by @benjaminhuth
• Adapt Mat_map_surface_plot_dist and Mat_map_surface_plot_dist to the new surface type and range lookup (#5359) by @veprbl
• Restore accidentally deleted file (#5362) by @paulgessinger
• Dump_args_calls (#5343) by @timadye

📚 Documentation

• Fix link URL (#5361) by @paulgessinger
• Update cppreference links (#5363) by @andiwand

⚡ Performance

• Split MbfSmoother compilation by measurement dimension (#5355) by @andiwand

⚙️ Miscellaneous Tasks

• RootMaterialTrackIo - Don't restrict input tree to be a TChain and add eventId getter (#5349) by @junggjo9
• Bump MMG version to 1.4.1 (#5351) by @benjaminhuth
• Move this_acts.sh after dependencies scripts (#5358) by @paulgessinger

v46.2.0

46.2.0

🚀 Features

• Adding JsonKindDispatcher + Surface conversion (#5195) by @ssdetlab
• dlopen-based geometry module support (#5253) by @paulgessinger
• Pass the detector construction options to the addGeant4 function (#5296) by @pbutti
• Part 2 of migration to GBTSv3 (#5328) by @jpreston-cern
• Replace boost::hash_combine with murmur3-mixed hashCombine (#5325) by @paulgessinger
• Add switch for Joseph form to GainMatrixUpdater (#5338) by @andiwand
• Add geometric filter options for strip seeding (#5339) by @mvessell96

🐛 Bug Fixes

• Std::ranges fixes done by AI (#5311) by @asalzburger
• Push_back to emplace_back done by AI (#5314) by @asalzburger
• MaterialDecorator - Don't clear the surface material (#5317) by @junggjo9
• Fix & build python binding of TensorRT in CI (#5324) by @benjaminhuth
• (cmake) Add Alignment component before Plugins subdirectory (#5329) by @wdconinc
• Bug fixes for GraphBasedSeedingConfig and layerNumbering function in examples (#5323) by @jpreston-cern

🚜 Refactor

• Use particle outcome for alive check (#5300) by @andiwand
• Split GNN bindings from between Plugins and Core (#5326) by @benjaminhuth
• Revise GbtsLayerConnection reading from file (#5331) by @andiwand
• Revise GraphBasedTrackSeeder::createSeeds interface (#5335) by @andiwand
• Use Acts::Result in GainMatrixUpdater (#5337) by @andiwand

🛠️ Build

• (deps) Bump SonarSource/sonarqube-scan-action from 7.0.0 to 7.1.0 (#5315) by @dependabot[bot]
• (deps) Bump actions/github-script from 8 to 9 (#5333) by @dependabot[bot]
• (deps) Bump https://github.com/pre-commit/mirrors-clang-format from v22.1.2 to 22.1.3 (#5332) by @dependabot[bot]

⚙️ Miscellaneous Tasks

• Automated python requirements upgrades (#5316) by @github-actions[bot]
• Automated python requirements upgrades (#5334) by @github-actions[bot]

v46.1.0

46.1.0

🚀 Features

• Bind more EDM types, simple python only demo script (#5271) by @benjaminhuth
• Add check for SurfaceArray grid + transform handling improvement (#5247) by @paulgessinger
• Add TGeoAxes python bindings (#5277) by @knutzk
• Inclination dependent SurfaceArray lookup (#5186) by @andiwand
• Python-only histogram writer and plotting utilities (#5276) by @benjaminhuth

🐛 Bug Fixes

• Limit external-eic-shell error reports to downstream use only (#4907) by @wdconinc
• Improve unused files check and exclude Python (#5075) by @AJPfleger
• Add missing const to Fpe monitoring (#5284) by @delitez
• Python version regex (#5299) by @benjaminhuth

🚜 Refactor

• Muon space point chi2 calculation -> simplification (#5294) by @junggjo9
• Push SurfaceGridLookup to .cpp file (#5285) by @paulgessinger
• Pass geo context to SurfaceArray lookup and return std::span (#5291) by @andiwand
• Split Fatras simulation header into single and multi particle sim (#5289) by @andiwand

📚 Documentation

• Improve pyproject.toml to include more information (#5306) by @benjaminhuth
• Update and extend docs on python bindings (#5302) by @benjaminhuth

🛠️ Build

• (deps) Bump https://github.com/pre-commit/mirrors-clang-format from v22.1.1 to 22.1.2 (#5297) by @dependabot[bot]

⚙️ Miscellaneous Tasks

• Remove outdate and/or unused CI scripts (#5214) by @AJPfleger
• Augment navigator logging messages (#5283) by @junggjo9
• Cleanup Geant4 simulation code (#5287) by @andiwand
• Bump dependencies package to v22.1.0 (#5292) by @paulgessinger
• Add unittest for rangeContainsValue function (#5293) by @junggjo9
• Bind free functions to namespace in FpeMonitoring plugin (#5290) by @andiwand
• Automated python requirements upgrades (#5298) by @github-actions[bot]
• Fix spack package repo ref (#5301) by @paulgessinger
• Changing material mapping default to navigation-less (#5281) by @asalzburger
• Rename Fatras ParticleOutcome to SimulationOutcome (#5215) by @andiwand
• Rename Fatras ProcessType to GenerationProcess (#5213) by @andiwand
• Follow-up after SurfaceArray changes in #5186 (#5307) by @andiwand

v46.0.0

46.0.0

🚨 BREAKING CHANGES

• Error handling for material mapping (#5031) by @andiwand
• Cleanup SpacePointContainer2 interface (#5144) by @andiwand
• Cleanup SeedContainer2 interface (#5145) by @andiwand
• Fix call signature for Material accumulator and mapper (#5181) by @asalzburger
• Move try all navigators to experimental namespace (#5233) by @andiwand
• Rename accumulater ->accumulator (#5209) by @AJPfleger
• Rename validater -> validator (#5208) by @AJPfleger
• Propagate the alignable volume to the Multilayer navigation policy (#5224) by @junggjo9
• Remove unused files (#5074) by @AJPfleger
• Distinct MultiComponentTrackParameters (#5150) by @andiwand
• One charge hypothesis (#5076) by @andiwand
• Make stepper bound params more explicit for propagation (#5240) by @andiwand
• Deprecate templated seeding (#5261) by @andiwand
• Generalize navigation options for external surfaces (#5243) by @andiwand

🚀 Features

• Python bindings for ObjVisualization3D (#5250) by @paulgessinger
• Chain method setting for Extent (#5244) by @paulgessinger
• Add Ranges utility to (#5246) by @paulgessinger
• Bindings for Spacepoints, Seeds and TrackContainer (#5242) by @paulgessinger

🐛 Bug Fixes

• Send transform to SrfArr in policy (#5238) by @paulgessinger
• Cmake: not all examples options set general examples (#5183) by @AJPfleger
• Pass proxy information to uv (#5178) by @fwyzard
• Cppcheck issues (#5217) by @asalzburger
• Make ROOT example python bindings respond to the correct flag (#5259) by @goblirsc
• Fix Fatras photon conversion (#5258) by @andiwand
• Fix GeoModel version compile switch (#5266) by @andiwand
• Spacepoint-Track association in GNN algorithm (#5263) by @benjaminhuth

🚜 Refactor

• Material designator with less boilerplate (#5221) by @paulgessinger
• Improved FPE mon, extend to macOS (#5231) by @paulgessinger
• Reduce verbosity of blueprint id assignment (#5245) by @paulgessinger
• Output improvement in TryAllNavPolicy (#5248) by @paulgessinger
• Combine try all navigators (#5232) by @andiwand
• Move logic into TrackerHitLocal (#5234) by @paulgessinger

📚 Documentation

• Improve ODD setup documentation, add redirects (#5237) by @paulgessinger

⚡ Performance

• Reduce number of redundant calls in strip seeding (#5239) by @mvessell96

🛠️ Build

• (cmake) Use tmpdir for uv python installation (#5235) by @paulgessinger
• (deps) Bump https://github.com/psf/black-pre-commit-mirror from 26.1.0 to 26.3.1 (#5273) by @dependabot[bot]
• (deps) Bump https://github.com/pre-commit/mirrors-clang-format from v22.1.0 to 22.1.1 (#5272) by @dependabot[bot]
• (deps) Bump https://github.com/BlankSpruce/gersemi from 0.26.0 to 0.26.1 (#5274) by @dependabot[bot]

⚙️ Miscellaneous Tasks

• Remove unused CI requirements (#5200) by @AJPfleger
• Bump Python version to 3.14 in github workflows (#5199) by @AJPfleger
• Pre-commit: bump code-spell 2.2.4 -> 2.4.2 (#5207) by @AJPfleger
• Surface & Volume remove deprecated symbols (#5176) by @junggjo9
• Automated python requirements upgrades (#5241) by @github-actions[bot]
• Add a C++23 build (#5223) by @paulgessinger
• Cleanup Fatras interaction code (#5257) by @andiwand
• Centrally typedef truth info in Examples (#5254) by @andiwand
• Some clang-tidy fixes (#5262) by @andiwand
• Add a notification for Key4hep when the build fails (#5265) by @jmcarcell
• Use dependabot to update pre-commit (#5268) by @AJPfleger
• Automated python requirements upgrades (#5275) by @github-actions[bot]
• Bump ModuleMapGraph to version 1.4.0 (#5269) by @benjaminhuth