diff --git a/apps/server/src/provider/Layers/ClaudeAdapter.ts b/apps/server/src/provider/Layers/ClaudeAdapter.ts
index 11a5322b4eee..a4dbfc6dddae 100644
--- a/apps/server/src/provider/Layers/ClaudeAdapter.ts
+++ b/apps/server/src/provider/Layers/ClaudeAdapter.ts
@@ -267,7 +267,6 @@ interface ClaudeTurnState {
    * steered instead (the queued message continues the same turn).
    */
   readonly synthetic?: boolean;
-  readonly items: Array<unknown>;
   readonly assistantTextBlocks: Map<number, AssistantTextBlockState>;
   readonly assistantTextBlockOrder: Array<AssistantTextBlockState>;
   readonly capturedProposedPlanKeys: Set<string>;
@@ -422,10 +421,8 @@ interface ClaudeSessionContext {
   resumeSessionId: string | undefined;
   readonly pendingApprovals: Map<ApprovalRequestId, PendingApproval>;
   readonly pendingUserInputs: Map<ApprovalRequestId, PendingUserInput>;
-  readonly turns: Array<{
-    id: TurnId;
-    items: Array<unknown>;
-  }>;
+  /** Turn ids completed in this live session. The native Claude session file is the transcript. */
+  readonly turns: Array<{ readonly id: TurnId }>;
   readonly inFlightTools: Map<number, ToolInFlight>;
   readonly claudeTasks: Map<string, ClaudeTaskState>;
   readonly taskAgents: Map<string, ClaudeTaskAgentState>;
@@ -2176,10 +2173,7 @@ export const makeClaudeAdapter = Effect.fn("makeClaudeAdapter")(function* (
     }
     return {
       threadId,
-      turns: context.turns.map((turn) => ({
-        id: turn.id,
-        items: [...turn.items],
-      })),
+      turns: context.turns.map((turn) => ({ id: turn.id, items: [] })),
     };
   });
 
@@ -2808,10 +2802,7 @@ export const makeClaudeAdapter = Effect.fn("makeClaudeAdapter")(function* (
       });
     }
 
-    context.turns.push({
-      id: turnState.turnId,
-      items: [...turnState.items],
-    });
+    context.turns.push({ id: turnState.turnId });
 
     yield* emitThreadTokenUsage(context, usageSnapshot, {
       rawMethod: "claude/result",
@@ -3175,10 +3166,6 @@ export const makeClaudeAdapter = Effect.fn("makeClaudeAdapter")(function* (
       return;
     }
 
-    if (context.turnState) {
-      context.turnState.items.push(message.message);
-    }
-
     for (const toolResult of toolResultBlocksFromUserMessage(message)) {
       const toolEntry = Array.from(context.inFlightTools.entries()).find(
         ([, tool]) => tool.itemId === toolResult.toolUseId,
@@ -3378,7 +3365,6 @@ export const makeClaudeAdapter = Effect.fn("makeClaudeAdapter")(function* (
         turnId,
         startedAt,
         synthetic: true,
-        items: [],
         assistantTextBlocks: new Map(),
         assistantTextBlockOrder: [],
         capturedProposedPlanKeys: new Set(),
@@ -3461,7 +3447,6 @@ export const makeClaudeAdapter = Effect.fn("makeClaudeAdapter")(function* (
           cwd: path.resolve(context.session.cwd ?? "."),
         });
       }
-      context.turnState.items.push(message.message);
       if (
         normalizeClaudeActiveTokenUsage(
           message.message.usage,
@@ -5205,7 +5190,6 @@ export const makeClaudeAdapter = Effect.fn("makeClaudeAdapter")(function* (
       const turnState: ClaudeTurnState = {
         turnId,
         startedAt: yield* nowIso,
-        items: [],
         assistantTextBlocks: new Map(),
         assistantTextBlockOrder: [],
         capturedProposedPlanKeys: new Set(),