ctsm5.4.011

[CTSM Gatekeeper]

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Tag name: ctsm5.4.011
Originator(s): slevis (Samuel Levis,UCAR/TSS,303-665-1310)
Date: Thu Jan 22 04:01:52 PM MST 2026
One-line Summary: Merge b4b-dev to master

Purpose and description of changes
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Change some _U and _R history fields to be on by default PR #3667 by Keith Oleson
Update to cime version that fixes the check_input_data --download issue PR #3647 by Erik Kluzek; #3647 updated to cime6.1.145, while updating b4b-dev to master in this PR gets us to cime6.1.146.
Initial fixes to generate_gdd20_baseline PR #3543
Decomp mod unittest PR #3699

Significant changes to scientifically-supported configurations
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Does this tag change answers significantly for any of the following physics configurations?
(Details of any changes will be given in the "Answer changes" section below.)

[Put an [X] in the box for any configuration with significant answer changes.]

[ ] clm6_0

[ ] clm5_0

[ ] ctsm5_0-nwp

[ ] clm4_5


Bugs fixed
----------
List of CTSM issues fixed (include CTSM Issue # and description) [one per line]:
No issues were opened for the PRs listed above.

Testing summary:
----------------

[PASS means all tests PASS; OK means tests PASS other than expected fails.]

build-namelist tests (if CLMBuildNamelist.pm has changed):

derecho - OK

python testing (if python code has changed; see instructions in python/README.md; document testing done):

derecho - OK

regular tests (aux_clm: https://github.com/ESCOMP/CTSM/wiki/System-Testing-Guide#pre-merge-system-testing):

derecho ----- OK
izumi ------- OK

Answer changes
--------------
Changes answers relative to baseline: No

Other details
-------------
Pull Requests that document the changes (include PR ids):
https://github.com/ESCOMP/ctsm/pull/3709

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