Design file format 2 with a migration chain (doc::format: older formats upgraded step by step, newer refused with a message, out-of-range numbers and broken occurrence placements refused); a corpus of designs saved by the M0, components-era, joints-era and current builds that must open and evaluate as saved (two pre-versioning behaviour changes listed with their reasons); damaged and hostile variants of every corpus file never panic

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01AS5Tn3xieewUSg3uxrMVdL

apps/solvecraft-cli/tests/corpus/scripts/m0-revolve-primitives.json

@@ -0,0 +1,11 @@
+{"commands": [
+ {"command": "SketchCreate", "params": {"plane": "XZ"}},
+ {"command": "DrawPolyline", "params": {"points": [[10, 0], [15, 0], [15, 5], [10, 5]], "closed": true}},
+ {"command": "SketchStop", "params": {}},
+ {"command": "Revolve", "params": {"axis": "y"}},
+ {"command": "PrimitiveBox", "params": {"length": 10, "width": 10, "height": 10, "corner": [30, 0, 0]}},
+ {"command": "PrimitiveCylinder", "params": {"diameter": 4, "height": 20, "base": [35, 5, -5]}},
+ {"command": "FusionCombineCommand", "params": {"target": "Body2", "tools": ["Body3"], "operation": "cut"}},
+ {"command": "FusionChamferCommand", "params": {"edges": [[30, 5, 10]], "distance": 1}},
+ {"command": "timeline.edit", "params": {"feature": "Revolve1", "set": {"angle": "180 deg"}}}
+]}