Add formatter metadata smoke fixtures

docs/prompt-architecture-improvement-plan.md

@@ -257,8 +257,8 @@ Improve later:
 Near-term:
 
 - Add final row hygiene already done through `prompt_hygiene.py`.
-- Add a metadata smoke checker for representative rows through
-  `tools/prompt_smoke.py`.
+- Add a metadata smoke checker for representative generated rows and static
+  formatter fixtures through `tools/prompt_smoke.py`.
 - Normalize every row with one function before JSON serialization.
 
 Medium-term:
@@ -359,5 +359,5 @@ Medium-term:
    checks.
 2. Extract hardcore role graph generation from `prompt_builder.py` into a
    dedicated `hardcore_role_graphs.py` module.
-3. Add route-level smoke fixtures for more representative Krea/SDXL/caption metadata
-   rows.
+3. Add more route-level smoke fixtures for generated edge cases that are not
+   covered by the current static Krea/SDXL/caption metadata fixtures.