CCPP Framework Meeting Minutes 2026 05 07

Agenda

• GitHub issues/PRs
• New items
• Updates
• Other business
• notes

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Attendees: Michael Kavulich, Dom Heinzeller, RhaeSung Kim, Jesse Nusbaumer, Cheryl Craig, Dustin Swales, Courtney Peverley

GitHub issues, PRs, discussions

PRs

• Update file_utils.py: fix evaluation of fmove #745

  • resolves #748

  • Needs two more approvals

• Bug fix in scripts/fortran_tools/parse_fortran.py for parsing character variable declarations #750
  • Needs two more approvals

Issues

• capgen: case-sensitivity when comparing metadata to Fortran #746
• capgen: dimension specifier foo(N) is not the same as foo(1:N) in Fortran code #747
• capgen Fortran parser does not accept internal DDTs as part of a registered DDT #749
• capgen: Add capability and test for passing mpi communicator as a flat field #751

Drafts/On Hold

• New test to demonstrate GNU failure #689
  • Associated issue: Unallocated fields passed into Group Caps #690
• DRAFT FOR DOM: Feature/capgen_for_fuji #718

Capgen project board

• Capgen issues discussed above; Is this still a useful way to track progress?

New items for discussion

• Trim down CCPP framework invite list
  • Done, responses are trickling in
• (Courtney & Dom) How best to continue development of Dustin's GNU bug branch

Updates from last time

Previous notes

Other business

Meeting notes

• Update file_utils.py: fix evaluation of fmove (#745)

  • Needs review from Courtney, Dustin

• Bug fix in scripts/fortran_tools/parse_fortran.py for parsing character variable declarations (#750)

  • Needs reviews as well
  • Dustin had got around this in the SCM with this

• Issues:

  • Dom encountered new issues getting capgen into NEPTUNE
    • Has fix for the MPI and internal DDT issues (same fix)

• Do we still look at the project board?

  • It’s not up to date, which is problematic
  • People agree that it’s useful

• Capgen presentation at physics meeting debrief

  • Seemed to go well
  • People learned a lot from Dom’s history
  • Seemed to be received well; people were engaged
  • Lisa asked about 3D physics - something that we can’t really handle but can feasibly integrate into host models

• Dom’s feeling like we need a redesign

  • Working on a new version of capgen
  • SIMA folks are fine with this if it works and seems like a good design
  • Some concerns about resorting to redesigns when things get hard
  • Dustin has sunk a lot of time into things and feels like there’s not a clean way forward
  • Cheryl is concerned about NCAR abandoning the CCPP if we don’t unify (internal concerns)
  • How can NCAR help current capgen while Dom works on his version of capgen?
    • We need it to work in SCM to show it can work
    • NCAR folks can keep working on current capgen in the meantime (starting with getting the DDT mods to work in CAM-SIMA)
  • Dom to share his overall design document; and will share the code when it passes all the tests

We will meet next week; Mike will be out of town