This PR contains critical changes to Perseus that affect published data. Please review the changes and note that you may need to coordinate deployment of these changes with other teams at Khan Academy, especially with #cp-eng to publish a content update.

Usually this means you need to update the Go parser that Content Platform maintains. Follow these steps on how to release. See this list of post-mortems for more information.

👀 Review the diff below. Once you've confirmed the change is intentional and any required follow-ups are in motion, add the schema-change-ack label to acknowledge. The check will re-run automatically.

diff --unified /home/github/work/_temp/branch-compare/base/schema.d.ts /home/github/work/_temp/branch-compare/pr/schema.d.ts
--- /home/github/work/_temp/branch-compare/base/schema.d.ts	2026-06-05 17:37:55.575058183 +0000
+++ /home/github/work/_temp/branch-compare/pr/schema.d.ts	2026-06-05 17:37:49.466772804 +0000
@@ -613,6 +613,7 @@
   };
   export type LockedPolygonPointType = {
     coord: Coord;
+    showAngle: boolean;
   };
   export type LockedPolygonType = {
     type: "polygon";