ChimeraX Developer Meeting

Attendance: Zach, Eric, Tom, Greg

January 26, 2026

Agenda

• Decide on numpy, PySide, Python updates for 1.12 (3.13 or 3.14?)
• Brainstorm about log performance, #9909
• Chimera not working with macOS 26, graphics pane positioned over command-line.
• Work in progress reports
• Inside ribbon color?
• Make Chimera end-of-life bug report and registration changes.

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Discussion

• Web accessibility
  • Greg reports current rbvi siteimprove score is 76.3/100 or 86.5%.
  • Looking for a Swishy page missing html language tag.
  • Still working on A and AA issues, but may need to look at AAA to improve score.

• Log performance
  • Discussed how to reduce large log size, for example, by linking old logs instead of embedding with disclosure triangle.
  • Tom suggests creating a test case that demonstrates the problem.
  • GUI Log code appears to only append messages to a file and a separate Qt HTML process renders. So not clear why this would slowdown ChimeraX even with large log.
  • Eric will ask Tristan for an example.

• OpenFold 3
  • Tom testing OpenFold 3 structure prediction as an open source alternative to Boltz.
  • OpenFold development focused on replicating AlphaFold 3 rather than novel features.

• Chimera Mac graphic mispositioned
  • Eric found window system app deactivate event that happens when Mac resize panel pops up and fixes the graphics position.
  • Next will see if he can replicate that event.

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Action Items