Utilities

Four small modules under utilities/ are generally useful for anyone embedding Python tooling in Blender:

• get_fcurves_from_object_action.py: get_fcurves_from_object_action(obj) returns the fcurves of an object's active action, handling legacy actions (reading action.fcurves directly, the pre-5.0 behavior) and Blender 5.0+ slotted actions (via bpy_extras.anim_utils.action_get_channelbag_for_slot() on the active action slot); it returns None when the object has no animated action or the lookup fails. The foot-group-movement foot locking method calls it.
• git_source_manager.py: resolve_git_sources() clones or fast-forward-updates git repositories into ~/.cache/freemocap/git_sources/ (override with FREEMOCAP_GIT_SOURCES_DIR or XDG_CACHE_HOME), records last-seen commits in .source_lock.json, stashes local changes before pulling, and degrades gracefully to the cached copy when offline. It's stdlib-only, so it works in Blender's bundled Python. The addon imports it at startup but does not currently call it for anything.
• install_dependencies.py: ensures pip exists in Blender's interpreter, checks imports locally with zero subprocesses, and installs anything missing from pip, git URL, or local-path specs. Presently a no-op beyond the pip check, given the empty dependency list.
• recording_framerate.py: the timestamps-based framerate derivation described preceding.