Issues

• Renumbering a surface or cell leaves it under its old number in the problem's collection

  bugs
  idaholab/MontePy#1029 · Filter by author MicahGale opened on Oct 19, 2026

• Cell.surfaces and Cell.complements keep objects removed from the geometry

  bugs
  Bug

  idaholab/MontePy#1027 · Filter by author MicahGale opened on Oct 18, 2026

• Support the data cards that modify a tally

  feature request
  Feature

  idaholab/MontePy#1026 · Filter by author MicahGale opened on Oct 18, 2026

• Support superimposed mesh tallies (TMESH and FMESH)

  feature request
  Feature

  idaholab/MontePy#1025 · Filter by author MicahGale opened on Oct 18, 2026
  1

• Support detector (F5) and radiography (FIP, FIR, FIC) tallies

  feature request
  Feature

  idaholab/MontePy#1024 · Filter by author MicahGale opened on Oct 18, 2026
  1

• Validate that an FM tally multiplier is allowed for its tally's type

  feature request
  Feature

  idaholab/MontePy#1023 · Filter by author MicahGale opened on Oct 18, 2026

• FM Inputs with a trailing C (cumulative) flag fail to parse

  bugsparsers are hard
  Bug

  idaholab/MontePy#1021 · Filter by author MicahGale opened on Oct 18, 2026

• Interpolate shortcut not re-fitted when all of its values shift

  bugslow priority
  Bug

  idaholab/MontePy#1020 · Filter by author MicahGale opened on Oct 17, 2026

• Decimal multiply shortcuts (e.g. 1.5m) fail to parse

  bugs
  Bug

  idaholab/MontePy#1019 · Filter by author MicahGale opened on Oct 17, 2026
  1

• Fix incorrect and missing tin isotope abundances in the pin-cell notebooks

  bugsdocumentation
  Bug

  idaholab/MontePy#1012 · Filter by author Sardor-tracker opened on Oct 6, 2026
  3

• Add support for MCNP 6.3.2

  good first prompt 🤖MCNP Manual
  Task

  idaholab/MontePy#1010 · Filter by author tjlaboss opened on Aug 24, 2026
  2

• Load partial inputs

  feature requestread file=...
  Feature

  idaholab/MontePy#999 · Filter by author tjlaboss opened on Jul 29, 2026
  4

• Easily Replace Materials

  feature request
  Feature

  idaholab/MontePy#998 · Filter by author tjlaboss opened on Jul 29, 2026
  2

• Add Ability to add a balance material component

  feature request
  Feature

  idaholab/MontePy#997 · Filter by author MicahGale opened on Jul 29, 2026

• 'black' target version warning

  CI/CD
  idaholab/MontePy#993 · Filter by author tjlaboss opened on Jul 27, 2026
  1

• Implement a search by comment function

  feature request
  Feature

  idaholab/MontePy#982 · Filter by author MicahGale opened on Jul 7, 2026
  1

  

• Add build attestation to CI release workflow

  CI/CDcode improvement
  Task

  idaholab/MontePy#971 · Filter by author MicahGale opened on Jun 17, 2026

• Adopt SPEC 8: Release control

  CI/CD
  Task

  idaholab/MontePy#959 · Filter by author MicahGale opened on May 28, 2026

• Add Accessibility audit to documentation CI.

  CI/CDdocumentationgood first prompt 🤖
  Task

  idaholab/MontePy#958 · Filter by author MicahGale opened on May 28, 2026
  1

• doc-build fails with warning

  CI/CDcode improvement
  Bug

  idaholab/MontePy#953 · Filter by author tjlaboss opened on May 8, 2026
  5

  

• Implement HalfSpace.mcnp_str() and HalfSpace.format_for_mcnp_input()

  feature requestgood first issue
  Feature

  idaholab/MontePy#942 · Filter by author tjlaboss opened on Apr 2, 2026
  2

• Migrate to Sphinx 9

  documentationgood first prompt 🤖
  Task

  idaholab/MontePy#939 · Filter by author MicahGale opened on Mar 29, 2026

• Make black CI job just commit changes

  CI/CDgood first prompt 🤖
  Task

  idaholab/MontePy#927 · Filter by author MicahGale opened on Mar 10, 2026

• Easily add comments to objects

  feature request
  Feature

  idaholab/MontePy#900 · Filter by author tjlaboss opened on Feb 19, 2026
  5

• Reconsider Surface.find_duplicate_surfaces()

  code improvement
  Feature

  idaholab/MontePy#878 · Filter by author tjlaboss opened on Jan 13, 2026
  1