CCPP Framework Meeting Minutes 2026 04 30

Agenda

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

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Attendees: Jesse Nusbaumer, Dom Heinzeller, Cheryl Craig, Jordan Powers, Courtney Peverley, Dustin Swales

GitHub issues, PRs, discussions

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

  • associated issue #744
  • just waiting for reviews.

• Clean CODEOWNERS #743

  • Currently approved (and will be merged).
  • Hope to reach out to Steve again later and see if he is still interested in collaborating.

• Simplify testing framework #741

  • Dom: It might be best for all of the host models to just move directly to the Python API, and thus get rid of all of this code entirely.

Drafts/On Hold

• New test to demonstrate GNU failure #689
  • Associated issue: Unallocated fields passed into Group Caps #690
  • Dustin: Automated tests all pass. Currently testing in CCPP SCM.
  • Courtney: Also testing this in SIMA (currently not working due to removed querying capabilities, but it should be fixable).
  • Dom: Can now successfully generate and build the CCPP-framework provided "hello world" example, and will work on testing it in NEPTUNE.
• DRAFT FOR DOM: Feature/capgen_for_fuji #718

Capgen project board

• No new issues/PRs

New items for discussion

• Dom's slides for optional arguments in capgen
  • Question: How should the framework handle a situation where a host doesn't provide the optional variable?
  • Courtney: If it is required by a scheme then maybe just abort if not intent(out) in the first listed scheme, or provided by the host.
  • Dom: I support this idea.
  • Dustin: What about suite-level variables? That seems to be the situation where schemes could break each other with optional arguments (either have consistency checks or require it be a host variable).
• Trim down CCPP framework invite list?
  • Courtney: We can probably remove folks from this meeting as they generally don't come. Should we?
  • Dom: Let's email them and ask if they want to keep being invited to this meeting. If they say no then let's remove them.
  • Decided to let Mike Kavulich send out the email to most of the people, as he is the official meeting owner.
• Plans for CCPP meeting presentation next Wednesday
  • Courtney and Dustin will plan to look it over and touch base next week before the meeting.
  • It would be great for Cheryl to at least look over the slides, as she has been involved the longest.
• (Dom) horizontal dimension handling
  • As a physics developer, I likely don't care how the horizontal grid is handled, I just need to know what the horizontal dimension is (so why have horizontal_dimension and horizontal_loop_extent).
  • Also horizontal_loop_extent is just horizontal_loop_begin and horizontal_loop_end, which feels like a waste.
  • So it would be nice for this all to be handled by the framework itself, and thus free the physics schemes to only worry about one horiztonal_dimension field, regardless of the CCPP phase.

Updates from last time

Previous notes

Other business

• Will plan to meet next week.

Meeting notes