Standard parts library (parts.library, parts.insert, parts.resize): ISO 4762 socket head cap screws, ISO 4014/4017 hex bolts, ISO 4032 nuts, ISO 7089 washers, ISO 4026 set screws, ISO 8734 dowel pins and 6000/6200/600-series bearing envelopes, M3–M20, built in code from the standards' dimensions as their own components with cosmetic threads; inserted at a hole's rim they get a rigid joint that puts them on the hole's axis seated on its face; resize rebuilds in place. Circle joint origins are named after the cylindrical wall

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

crates/engine/src/cmd/mod.rs

@@ -17,6 +17,7 @@ mod inspect;
 pub(crate) mod joints;
 mod measure_sel;
 pub(crate) mod motion;
+mod parts;
 mod section;
 pub(crate) use measure_sel::measure_items;
 mod parameters;
@@ -146,6 +147,7 @@ pub fn command_specs() -> Vec<&'static CommandSpec> {
     v.extend(joints::COMMANDS.iter());
     v.extend(motion::COMMANDS.iter());
     v.extend(config::COMMANDS.iter());
+    v.extend(parts::COMMANDS.iter());
     v.extend(browser::COMMANDS.iter());
     v.extend(delete::COMMANDS.iter());
     v.extend(edit::COMMANDS.iter());