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1. Commits on Aug 15, 2026

   • Query optional build features through the C API (#4064)

     paulromano

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2. Commits on Aug 5, 2026

   • Release notes for 0.16.0 (#4045)

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     paulromano

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     pshriwise

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3. Commits on Jul 22, 2026

   • MGXS Bootstrapping (#3965)

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4. Commits on Jul 16, 2026

   • Native parametric tokamak source (#3999)

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     eepeterson

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     paulromano

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5. Commits on May 9, 2026

   • Implement DecaySpectrum distribution type and utilize in R2S (#3930)

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     paulromano

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     Copilot

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6. Commits on Mar 17, 2026

   • Add `fusion_neutron_spectrum` to openmc.stats module (#3862)

     paulromano

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7. Commits on Mar 3, 2026

   • Add method on Material for computing photon contact dose rate (#3700)

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     marco-de-pietri

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     paulromano

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8. Commits on Feb 21, 2026

   • Support arbitrary symmetry axis for CylindricalIndependent class (#3474)

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     GuySten

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     paulromano

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   • Implement tally filter for filtering by reaction (#3809)

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9. Commits on Feb 13, 2026

   • SolidRayTracePlot CAPI (#3789)

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     pshriwise

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     GuySten

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10. Commits on Feb 6, 2026

    • C-API bindings for key random ray functions (#3749)

      nuclearkevin

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    • Implement filter for secondary particle production binned by energy (#3453)

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      gridley

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      paulromano

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11. Commits on Jan 10, 2026

    • Flux Energy Group Conversion using lethargy-weighted redistribution (#3705)

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      yrrepy

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      GuySten

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12. Commits on Dec 5, 2025

    • Introduce SlicePlot and VoxelPlot to replace the Plot class (#3528)

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      bpolania

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      paulromano

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13. Commits on Nov 13, 2025

    • Addition of a collision tracking feature (#3417)

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      saliba170499

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      paulromano

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14. Commits on Nov 1, 2025

    • Automate workflow for mesh- or cell-based R2S calculations (#3508)

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15. Commits on Jul 1, 2025

    • Introduce `openmc.lib.TemporarySession` context manager (#3475)

      paulromano

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16. Commits on Jun 25, 2025

    • Introduce WeightWindowsList class that enables export to HDF5 (#3456)

      paulromano

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17. Commits on Jun 6, 2025

    • Implement a new MeshMaterialFilter (#3406)

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18. Commits on May 12, 2025

    • External transfer rates source term (#3088)

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      church89

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      paulromano

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19. Commits on May 5, 2025

    • Filter weight implementation (#3345)

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    • Updates to VTK data checks (#3371)

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      pshriwise

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      paulromano

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20. Commits on Apr 2, 2025

    • Random Ray AutoMagic Setup (#3351)

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      jtramm

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      paulromano

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21. Commits on Mar 7, 2025

    • Release notes for 0.15.1 (#3340)

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      paulromano

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      pshriwise

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22. Commits on Feb 26, 2025

    • Compute material volumes in mesh elements based on raytracing (#3129)

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23. Commits on Feb 21, 2025

    • Simulation of decay photons through the D1S method (#3235)

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      paulromano

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24. Commits on Feb 18, 2025

    • Raytrace plots (#2655)

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25. Commits on Jan 7, 2025

    • Differentiate materials in DAGMC universes (#3056)

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26. Commits on Nov 13, 2024

    • Add PointCloud spatial distribution (#3161)

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27. Commits on Nov 12, 2024

    • Add a vessel composite surface with ellipsoids on top and bottom. (#3168)

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28. Commits on Oct 11, 2024

    • Add ConicalFrustum composite surface (#3151)

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      paulromano

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      eepeterson

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29. Commits on Oct 5, 2024

    • Introduce ParticleList class for manipulating a list of source particles (#3148)

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      zoeprieto

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      paulromano

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30. Commits on Oct 4, 2024

    • Implement filter for cosine of angle of surface crossing (#2768)

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      zoeprieto

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      paulromano

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31. Commits on Aug 19, 2024

    • Add OrthogonalBox composite surface (#3118)

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32. Commits on Aug 16, 2024

    • Add delta_function convenience function (#3090)

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