Closed-loop camera calibration: pixel servo handles arbitrary rig conventions

MeshGod/TRELLIS Mixamo re-rigs pose half a metre underground and compressed
(bone-space origin at hips, 0.01/100 scale sandwich). Instead of fighting
transform conventions, the renderer probes the first posed frame, measures
the actual sprite in pixels, and servo-corrects ortho scale + camera z:
unclip -> converge height -> pin feet to the ground row. Also: normalize
scales all root objects, deformed-height helper.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

characters/birdie/manifest.json

@@ -0,0 +1,42 @@
+{
+  "id": "birdie",
+  "name": "BIRDIE",
+  "health": 900,
+  "walk_speed": 3.8,
+  "back_speed": 3.0,
+  "jump_velocity": -14.0,
+  "color": "#e878b0",
+  "sprite_scale": 1.25,
+  "wardrobe": {
+    "states": [
+      "base",
+      "torn"
+    ],
+    "tear_below_hp": 0.35
+  },
+  "normals": {
+    "P": "jab",
+    "6P": "straight",
+    "K": "kick"
+  },
+  "command_moves": [
+    {
+      "motion": [
+        2,
+        3,
+        6
+      ],
+      "button": "P",
+      "move": "special"
+    }
+  ],
+  "finisher": {
+    "motion": [
+      2,
+      3,
+      6
+    ],
+    "button": "K",
+    "move": "finisher"
+  }
+}

characters/birdie/moves/block/data.json

@@ -0,0 +1,440 @@
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+}

characters/birdie/moves/crouch/data.json

@@ -0,0 +1,180 @@
+{
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+  "loop": false,
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+}

characters/birdie/moves/death/data.json

@@ -0,0 +1,280 @@
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