Expose recording renderer clear reset automation

docs/modernization/roadmap.md

@@ -860,7 +860,10 @@ Results:
   render-pass/depth-clear counts, and draw
   descriptor vertex/index totals, scissor/depth/blend-state plus
   shader-uniform/texture/sampler-bind/upload/mipmap-generation/texture-transition/texture-copy/readback/
-  frame-capture/blit command/byte totals for agent automation, with an
+  frame-capture/blit command/byte totals for agent automation. The
+  `--exercise-clear` mode deliberately clears an interrupted trace/render pass,
+  verifies stale trace-scope state is rejected, verifies the render context can
+  be reused, and then emits that reset status in JSON. It also has an
   expected-failure smoke for oversized render/readback targets.
 - `pano_cli simulate-document-history` exercises pure document history
   apply/undo/redo behavior and emits JSON layer/frame/history state for agent