fieldtest close: Floats — B1 fixed, F1+G1 documented, architect-checklist queued

docs/roadmap.md

@@ -112,8 +112,16 @@ work progresses.
   silently regrow history anchors / REVERTED narratives /
   workflow detail / stale cross-references. Path-anchored
   exceptions (`docs/specs/2026-05-09-*`) need an allowlist.
+  Same extension should add the **lockstep-checklist** the
+  Floats fieldtest exposed: for every new typecheck reject arm
+  on a pattern shape, verify the corresponding desugar pass does
+  not eat that shape first; for every new lowering arm in
+  `lower_app`, verify `is_static_callee` recognises it. Both
+  shipped silently-broken in the Floats milestone (B1 and the
+  iter-4.2/4.4 pull-forwards) and the architect missed them.
   - context: JOURNAL 2026-05-10 ("Milestone close:
-    design-md-consolidation").
+    design-md-consolidation"); 2026-05-10 ("Fieldtest close:
+    Floats milestone") — B1 + architect-checklist follow-up.
 - [ ] **\[todo\]** `design_schema_drift.rs` fidelity widening —
   current test checks anchor *presence* anywhere in DESIGN.md;
   the audit found that `[high]` schema gaps in §"Data model"