diff --git a/packages/opencode/src/session/processor.ts b/packages/opencode/src/session/processor.ts
index e7532d20073b..f9716a72cc46 100644
--- a/packages/opencode/src/session/processor.ts
+++ b/packages/opencode/src/session/processor.ts
@@ -279,7 +279,7 @@ export namespace SessionProcessor {
                     sessionID: input.sessionID,
                     messageID: input.assistantMessage.parentID,
                   })
-                  if (await SessionCompaction.isOverflow({ tokens: usage.tokens, model: input.model })) {
+                  if (!input.assistantMessage.summary && await SessionCompaction.isOverflow({ tokens: usage.tokens, model: input.model })) {
                     needsCompaction = true
                   }
                   break