phase: 20.49 COMPLETE; 20.50 Flow+String minimal reps; 20.51 selfhost v0/v1 minimal (Option A/B); hv1-inline binop/unop/copy; docs + run_all + CURRENT_TASK -> 21.0

apps/tmp_len_stringbox_probe.hako

@@ -0,0 +1,12 @@
+// Probe: StringBox.length() value path under JIT-direct
+static box Main {
+  main() {
+    local s
+    s = new StringBox("abc")
+    local n
+    n = s.length()
+    print("len=" + n.toString())
+    return n
+  }
+}
+