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1. Commits on Oct 10, 2026

   • Annihilate positrons below the positron energy cutoff (#4157)

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2. Commits on Oct 9, 2026

   • Fix temperature interpolation at the high endpoint (#4169)

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     agourakis82

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     paulromano

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   • Fix Model.run returning a stale statepoint on coarse timestamps (#4184)

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3. Commits on Oct 8, 2026

   • Fix variance tally trigger to use its own uncertainty ratio (#4175)

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     yrrepy

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     paulromano

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   • Use int64 flat filter index in WeightWindows::update_weights (#4174)

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     yrrepy

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     paulromano

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   • Report unresolvable nuclide names instead of terminating (#4130)

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   • Preserve ENDF target excitation and reaction metadata in HDF5 (#4146)

     paulromano

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4. Commits on Oct 7, 2026

   • Broadcast tally results in chunks (#4125)

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   • Assign the delayed yield to every delayed group (#4148)

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   • Avoid NaN standard deviation from roundoff in Tally.std_dev (#4127)

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   • Close tally group for internal tallies on statepoint load (#4173)

     yrrepy

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   • Clarify AI disclosure and security reporting policies (#4172)

     paulromano

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5. Commits on Oct 6, 2026

   • Restrict pull request merging to Technical Committee members (#4171)

     paulromano

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6. Commits on Oct 5, 2026

   • Follow-up to Clip negative atom densities: Cleanup of redundant warnings and clips (#4170)

     yrrepy

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7. Commits on Oct 4, 2026

   • Avoid ldexp call when converting random numbers to double (#4159)

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     GuySten

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     claude

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8. Commits on Oct 3, 2026

   • Fix input_path resolving empty filenames to cwd (#4154)

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     Arthur031221

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     paulromano

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   • test: reuse canonical unstructured mesh assets (#4152)

     kvnloo

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   • Add a length multiplier option for XDG meshes. (#4155)

     nuclearkevin

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   • test: share weight-window data paths (#4151)

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   • test: share DAGMC unit-test geometry fixtures (#4150)

     kvnloo

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9. Commits on Sep 27, 2026

   • Add XDG support for unstructured mesh tallies (#3889)

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10. Commits on Sep 25, 2026

    • Add OpenAI config YAML file for reviewing-openmc-code skill (#4145)

      paulromano

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11. Commits on Sep 22, 2026

    • Add PNNL material composition library (#4134)

      paulromano

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12. Commits on Sep 20, 2026

    • Set format install to fix git repo builds (#4143)

      nuclearkevin

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13. Commits on Sep 19, 2026

    • Enable unused variable warnings (#4142)

      paulromano

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14. Commits on Sep 16, 2026

    • Add domain decomposition for random ray solver (#4026)

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15. Commits on Sep 13, 2026

    • Distinguish atomic and nuclear masses (#4129)

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      paulromano

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      claude

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16. Commits on Sep 12, 2026

    • Replace git submodules with `find_package` + FetchContent (#4085)

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17. Commits on Sep 11, 2026

    • Random Ray Linear Source Gradient Limiter (#4121)

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    • Naive Flux Linear Source Consistency Fix (#4111)

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18. Commits on Sep 10, 2026

    • Deprecate surf_source_read in favor of a file source (#4123)

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    • Reset settings leaked across openmc_finalize() (#4122)

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      GuySten

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      claude

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    • Compute bounding boxes for general planes and tori in C++ (#4087)

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      dylanpulver

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      paulromano

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19. Commits on Sep 9, 2026

    • Make keff search control work with depletion. (#4083)

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    • Adaptive Volume Estimators (#4110)

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