Drag manipulators and automatic operation: extrude (two arrows when symmetric), fillet/chamfer, shell and move arrows drag their value with round-step snapping (Alt/Ctrl: free) and the dialog follows; Extrude operation "auto" (engine) and the dialog follow the geometry: into a body cuts (red), out of one joins, free space makes a new body; a manual choice sticks

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

crates/engine/src/lib.rs

@@ -20,7 +20,7 @@ use serde_json::Value;
 use solvecraft_doc::{Document, Model, ModelState};
 use solvecraft_geom::Vec3;
 
-pub use cmd::{CommandInfo, CommandSpec, command_specs, find_command};
+pub use cmd::{CommandInfo, CommandSpec, auto_operation, command_specs, find_command};
 pub use solvecraft_doc as doc;
 pub use solvecraft_geom as geom;
 pub use solvecraft_io as io;