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Add new stretching transformation to mesh tools#270

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cjohnson-pi wants to merge 22 commits intoMetOffice:mainfrom
cjohnson-pi:stretching
Open

Add new stretching transformation to mesh tools#270
cjohnson-pi wants to merge 22 commits intoMetOffice:mainfrom
cjohnson-pi:stretching

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@cjohnson-pi cjohnson-pi commented Feb 10, 2026

PR Summary

Sci/Tech Reviewer:
Code Reviewer: @mo-rickywong

Code Quality Checklist

  • I have performed a self-review of my own code
  • My code follows the project's style guidelines
  • Comments have been included that aid understanding and enhance the readability of the code
  • My changes generate no new warnings
  • All automated checks in the CI pipeline have completed successfully

Testing

  • I have tested this change locally, using the LFRic Core rose-stem suite
  • If required (e.g. API changes) I have also run the LFRic Apps test suite using this branch
  • If any tests fail (rose-stem or CI) the reason is understood and acceptable (e.g. kgo changes)
  • I have added tests to cover new functionality as appropriate (e.g. system tests, unit tests, etc.)
  • Any new tests have been assigned an appropriate amount of compute resource and have been allocated to an appropriate testing group (i.e. the developer tests are for jobs which use a small amount of compute resource and complete in a matter of minutes)

LFRic Apps Testing still to be completed.

trac.log

Test Suite Results - lfric_core - test_stretching/run10

Suite Information

Item Value
Suite Name test_stretching/run10
Suite User christine.johnson
Workflow Start 2026-03-05T11:56:06
Groups Run suite_default
Dependency Reference Main Like
lfric_core cjohnson-pi/lfric_core@stretching False
SimSys_Scripts MetOffice/SimSys_Scripts@2025.12.1 True

Task Information

✅ succeeded tasks - 378

Security Considerations

  • I have reviewed my changes for potential security issues
  • Sensitive data is properly handled (if applicable)
  • Authentication and authorisation are properly implemented (if applicable)

Performance Impact

  • Performance of the code has been considered and, if applicable, suitable performance measurements have been conducted

AI Assistance and Attribution

  • Some of the content of this change has been produced with the assistance of Generative AI tool name (e.g., Met Office Github Copilot Enterprise, Github Copilot Personal, ChatGPT GPT-4, etc) and I have followed the Simulation Systems AI policy (including attribution labels)

Documentation

  • Where appropriate I have updated documentation related to this change and confirmed that it builds correctly

PSyclone Approval

  • If you have edited any PSyclone-related code (e.g. PSyKAl-lite, Kernel interface, optimisation scripts, LFRic data structure code) then please contact the TCD Team

Sci/Tech Review

  • I understand this area of code and the changes being added
  • The proposed changes correspond to the pull request description
  • Documentation is sufficient (do documentation papers need updating)
  • Sufficient testing has been completed

(Please alert the code reviewer via a tag when you have approved the SR)

Code Review

  • All dependencies have been resolved
  • Related Issues have been properly linked and addressed
  • CLA compliance has been confirmed
  • Code quality standards have been met
  • Tests are adequate and have passed
  • Documentation is complete and accurate
  • Security considerations have been addressed
  • Performance impact is acceptable

@github-actions github-actions bot added the cla-required The CLA has not yet been signed by the author of this PR - added by GA label Feb 10, 2026
@cjohnson-pi cjohnson-pi added the KGO This PR contains changes to KGO label Feb 18, 2026
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poly_power

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Document describing the new stretching function and its implementation stretch.pdf

@cjohnson-pi cjohnson-pi marked this pull request as ready for review March 4, 2026 10:46
@cjohnson-pi cjohnson-pi requested review from a team and mo-rickywong as code owners March 4, 2026 10:46
@cjohnson-pi cjohnson-pi added this to the Summer 2026 milestone Mar 4, 2026
@github-actions github-actions bot added cla-signed The CLA has been signed as part of this PR - added by GA and removed cla-required The CLA has not yet been signed by the author of this PR - added by GA labels Mar 5, 2026
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