Configurations: a configuration table of rows (parameter expressions and feature suppressions per row) that switch the design (config.activate: undoable, all or nothing), kept through parameter renames and feature deletes; FusionStartDesignConfigModeCmd, FusionShowDesignConfigPanelCmd (with whether the design still matches the active row), config.column, config.row

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

crates/engine/src/cmd/mod.rs

@@ -11,6 +11,7 @@ mod face;
 mod features;
 mod features_more;
 pub use features::auto_operation;
+mod config;
 mod file;
 mod inspect;
 pub(crate) mod joints;
@@ -144,6 +145,7 @@ pub fn command_specs() -> Vec<&'static CommandSpec> {
     v.extend(component::COMMANDS.iter());
     v.extend(joints::COMMANDS.iter());
     v.extend(motion::COMMANDS.iter());
+    v.extend(config::COMMANDS.iter());
     v.extend(browser::COMMANDS.iter());
     v.extend(delete::COMMANDS.iter());
     v.extend(edit::COMMANDS.iter());