Refitting fails on a custom rig

[met4citizen]

Describe the bug

• I created a new human character using: New human | From scratch | Create human
• Loaded my custom rig from a local file: Developer | Load rig | "talkinghead.mpfbskel"
• Loaded my custom weights: Developer | Load weights | "talkinghead.mhw"
• When I then attempt to refit using Model| Refit assets to basemesh, I receive the following error: "FileNotFoundError: [Errno 2] No such file or directory: '/Users/mikasuominen/Library/Application Support/Blender/5.0/extensions/blender_org/mpfb/data/rigs/standard/rig.unknown.json'"

It seems that RigService attempts to identify the rig type based on current bone names. This process fails because my rig uses custom bone names. In a sense, this a good thing, because if the matching logic were to incorrectly identify the rig as a known standard rig, the rig and weights would probably have been modified.

As a temporary workaround, I copied my custom rig file "talkinghead.mpfbskel" to "rig.unknown.json" and my custom weights file "talkinghead.mhw" to "weights.unknown.json". After doing this, refitting works as expected. However, this approach is clearly a hack, and a more robust solution would be preferable.

Screenshots / logs

Platform and versions

• OS: macOS
• Blender 5.0
• MFPB v2.0.13