diff --git a/config/assertion-safety-baseline.txt b/config/assertion-safety-baseline.txt
index 9c81ddadcc35..28e149715c38 100644
--- a/config/assertion-safety-baseline.txt
+++ b/config/assertion-safety-baseline.txt
@@ -436,7 +436,6 @@ extensions/discord/src/send.shared.ts	4
 extensions/discord/src/send.webhook.ts	1
 extensions/discord/src/setup-account-state.ts	1
 extensions/discord/src/setup-core.ts	1
-extensions/discord/src/shared-interactive.ts	1
 extensions/discord/src/shared.ts	1
 extensions/discord/src/status-issues.ts	1
 extensions/discord/src/target-parsing.ts	1
diff --git a/extensions/discord/src/shared-interactive.test.ts b/extensions/discord/src/shared-interactive.test.ts
index 642627a6d6df..5eed7ac26003 100644
--- a/extensions/discord/src/shared-interactive.test.ts
+++ b/extensions/discord/src/shared-interactive.test.ts
@@ -98,6 +98,59 @@ describe("buildDiscordInteractiveComponents", () => {
     });
   });
 
+  it.each([
+    {
+      name: "approval",
+      action: {
+        type: "approval" as const,
+        approvalId: "approval-1",
+        approvalKind: "exec" as const,
+        decision: "allow-once" as const,
+      },
+      expected: {
+        internalCustomId: "execapproval:kind=exec;id=approval-1;action=allow-once",
+      },
+    },
+    {
+      name: "callback",
+      action: { type: "callback" as const, value: "plugin:opaque|value" },
+      expected: { callbackData: "plugin:opaque|value", callbackDataKind: "callback" },
+    },
+    {
+      name: "command",
+      action: { type: "command" as const, command: "/codex inspect" },
+      expected: { callbackData: "/codex inspect", callbackDataKind: "command" },
+    },
+    {
+      name: "question",
+      action: {
+        type: "question" as const,
+        questionId: "ask_0123456789abcdef0123456789abcdef",
+        optionValue: "Production",
+      },
+      expected: { internalCustomId: "ocq:id=ask_0123456789abcdef0123456789abcdef;i=1" },
+    },
+  ])("preserves typed $name authority through the legacy renderer", ({ action, expected }) => {
+    expect(
+      buildDiscordInteractiveComponents({
+        blocks: [
+          {
+            type: "buttons",
+            buttons: [
+              {
+                label: "Unavailable",
+                action: { type: "web-app", widgetId: "invalid" },
+              },
+              { label: "Continue", action },
+            ],
+          },
+        ],
+      }),
+    ).toMatchObject({
+      blocks: [{ type: "actions", buttons: [{ label: "Continue", ...expected }] }],
+    });
+  });
+
   it.each(["url", "web-app"] as const)(
     "renders typed %s actions as Discord link buttons",
     (type) => {
diff --git a/extensions/discord/src/shared-interactive.ts b/extensions/discord/src/shared-interactive.ts
index a6ce85a64caa..d7fa5ba9fdb6 100644
--- a/extensions/discord/src/shared-interactive.ts
+++ b/extensions/discord/src/shared-interactive.ts
@@ -1,6 +1,6 @@
 // Discord plugin module implements shared interactive behavior.
 import {
-  reduceLegacyInteractiveReply,
+  legacyInteractiveReplyToPresentation,
   resolveMessagePresentationActionValue,
   resolveMessagePresentationButtonAction,
   resolveMessagePresentationOptionAction,
@@ -180,28 +180,9 @@ function appendDiscordSelectBlock(
 export function buildDiscordInteractiveComponents(
   interactive?: LegacyInteractiveReply,
 ): DiscordComponentMessageSpec | undefined {
-  const blocks = reduceLegacyInteractiveReply(
-    interactive,
-    [] as NonNullable<DiscordComponentMessageSpec["blocks"]>,
-    (state, block) => {
-      if (block.type === "text") {
-        const text = block.text.trim();
-        if (text) {
-          state.push({ type: "text", text });
-        }
-        return state;
-      }
-      if (block.type === "buttons") {
-        appendDiscordButtonBlocks(state, block.buttons);
-        return state;
-      }
-      if (block.type === "select") {
-        appendDiscordSelectBlock(state, block);
-      }
-      return state;
-    },
+  return buildDiscordPresentationComponents(
+    interactive ? legacyInteractiveReplyToPresentation(interactive) : undefined,
   );
-  return blocks.length > 0 ? { blocks } : undefined;
 }
 
 export function buildDiscordPresentationComponents(