diff --git a/docs/superpowers/plans/2026-09-01-llm-error-retry-memory.md b/docs/superpowers/plans/2026-09-01-llm-error-retry-memory.md
index f453f0a..883a718 100644
--- a/docs/superpowers/plans/2026-09-01-llm-error-retry-memory.md
+++ b/docs/superpowers/plans/2026-09-01-llm-error-retry-memory.md
@@ -704,9 +704,12 @@ package service
 import (
 	"sync"
 	"testing"
+	"time"
 )
 
 // analyzeOnce 应合并并发同键分析请求，只执行一次 fn
+// 注:singleflight 仅对 in-flight 请求去重,故 fn 内须 sleep(50ms) 拉长执行窗口,
+// 否则 10 个 goroutine 未必都在首个完成前启动,calls==1 断言会间歇失败(计划原版因此非确定,已修)。
 func TestAnalyzeOnceDedup(t *testing.T) {
 	var mu sync.Mutex
 	calls := 0
@@ -714,6 +717,7 @@ func TestAnalyzeOnceDedup(t *testing.T) {
 		mu.Lock()
 		calls++
 		mu.Unlock()
+		time.Sleep(50 * time.Millisecond)
 		return true, "dedup"
 	}
 	var wg sync.WaitGroup