Use Kimodo body motion for regular 360 flips

docs/kimodo-360-flip.md

@@ -0,0 +1,41 @@
+# Kimodo 360-flip body replacement
+
+The regular 360 flip uses Kimodo variation 1 from the three-pose Blender test.
+The existing `B_360FLIP_G` / `B_360FLIP_A` graph path, metadata, timing,
+stance mirroring, trajectory and skateboard animation still own the trick.
+All D/GONZ/HSU low/high ground and air slots receive the replacement body.
+Nollie variants, dark catches, idle and carving are unchanged.
+
+The optional local asset is `assets/private/custom/360flip.json`. Missing it
+restores stock playback; malformed data reports an error at startup. The asset
+is private and ignored by Git, like the other imported animation data.
+
+The file contains 46 absolute native-space skeleton poses converted from the
+Blender comparison's `KIMODO Kickflip - Variation 1` action. Its translation
+is anchored to the source clip's first hip position; the comparison's side-by-side
+object offset and Kimodo's floor normalization are removed. The source ground
+section is frames 0–12 and the air section is 13–45, independently retimed to
+each stock slot's original key count. Three-frame entry/exit fades retain the
+stock endpoints. There is no new fade at the ground/air seam.
+
+At load time the evaluator converts body globals into local deltas relative to
+the bank's `RIG_TPOSE`. Board-parented hand/toe targets are recomputed against
+each stock frame's moving board. Trajectory and board subtree samples, channel
+weights, loop transforms and headers remain the original values. All normal
+tree blending and mirroring then operate on those samples.
+
+Source workspace: `../skate-animation-extraction/kimodo-three-pose-test/`.
+`export_game.py` is the Blender CLI exporter; `generation-info.json` records the
+Kimodo model, seed and prompt. Only Skate 3 source frames 1, 23.5 and 46 were
+provided to Kimodo. Its output is native 30 fps, retargeted to this skater and
+resampled to the source clip's 60 fps timeline for this replacement.
+
+Export SHA-256:
+`f086c70fabf13f02f59f7b792f528d7c519dad43c7536c168e675f1069580294`.
+
+Validation covers native reference-pose removal, malformed assets, all twelve
+replacement slots, unchanged board/trajectory samples and timing, entry/exit
+poses, channel weights, finite mirrored poses and unchanged nollie/idle clips.
+The original 360-flip graph pipeline fixture also passes in both stances.
+Rendered evaluator captures check the imported body and retained board together;
+these are not a controller-played visual acceptance test.