sketch.dimension reports measured on the solved sketch: it reported the value the geometry had before the new dimension was solved, so dimensioning a 99.84 mm trough line to 100 answered measured: 99.84 and looked like the dimension had not taken. The command now measures the new dimension again once the sketch is solved (driven dimensions too), through a new solvecraft_sketch::measure_dimension that shares the solver's own measuring. Tests: lengths, a driven distance and a diameter report their solved values

crates/engine/src/cmd/sketch.rs

@@ -1443,6 +1443,8 @@ fn dimension(s: &mut Session, p: &Value) -> Result<Value> {
         place_text(sk, &id, text_at);
         Ok((pname, name, cur))
     })?;
+    // Report what the dimension measures once the sketch is solved, not the geometry before.
+    let current = solved_measure(s, p, cmd).unwrap_or(current);
     if driven {
         return Ok(json!({"param": Value::Null, "driven": true, "type": kind_name, "measured": current, "sketch": info}));
     }
@@ -1453,6 +1455,12 @@ fn dimension(s: &mut Session, p: &Value) -> Result<Value> {
     Ok(json!({"param": param, "type": kind_name, "expression": v, "measured": current, "sketch": info}))
 }
 
+/// What the dimension just added (the sketch's last constraint) measures on the solved sketch.
+fn solved_measure(s: &Session, p: &Value, cmd: &str) -> Option<f64> {
+    let sk = s.doc.sketch(target_sketch(s, p, cmd).ok()?).ok()?;
+    solvecraft_sketch::measure_dimension(sk, &sk.constraints.last()?.kind)
+}
+
 /// Keep a dimension's text where it was placed (`at`, sketch coordinates), relative to the
 /// dimension so it follows the geometry.
 fn place_text(sk: &mut Sketch, id: &str, at: Option<Vec2>) {