diff --git a/.agents/notes/proposed/simplification/2026-07-26-builtin-timer-promises-for-hand-rolled-sleeps.i18n.yaml b/.agents/notes/rejected/simplification/2026-07-26-builtin-timer-promises-for-hand-rolled-sleeps.i18n.yaml
similarity index 71%
rename from .agents/notes/proposed/simplification/2026-07-26-builtin-timer-promises-for-hand-rolled-sleeps.i18n.yaml
rename to .agents/notes/rejected/simplification/2026-07-26-builtin-timer-promises-for-hand-rolled-sleeps.i18n.yaml
index 95e1524788..c13545596e 100644
--- a/.agents/notes/proposed/simplification/2026-07-26-builtin-timer-promises-for-hand-rolled-sleeps.i18n.yaml
+++ b/.agents/notes/rejected/simplification/2026-07-26-builtin-timer-promises-for-hand-rolled-sleeps.i18n.yaml
@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write
-2026-07-26-builtin-timer-promises-for-hand-rolled-sleeps.md: 1a012aeabc7f9445127d6b8edcbe2f72e62f0eba
-2026-07-26-builtin-timer-promises-for-hand-rolled-sleeps.zh.md: 742d2c5ee8573c9b2bdf555c938c83dd6ea9f999
+2026-07-26-builtin-timer-promises-for-hand-rolled-sleeps.md: 475fd632cd4f75c966d4693e049edd48a1301992
+2026-07-26-builtin-timer-promises-for-hand-rolled-sleeps.zh.md: 47b20fdb237ab52aecba6b7df20dbd25eeb1649e
diff --git a/.agents/notes/proposed/simplification/2026-07-26-builtin-timer-promises-for-hand-rolled-sleeps.md b/.agents/notes/rejected/simplification/2026-07-26-builtin-timer-promises-for-hand-rolled-sleeps.md
similarity index 92%
rename from .agents/notes/proposed/simplification/2026-07-26-builtin-timer-promises-for-hand-rolled-sleeps.md
rename to .agents/notes/rejected/simplification/2026-07-26-builtin-timer-promises-for-hand-rolled-sleeps.md
index 1a012aeabc..475fd632cd 100644
--- a/.agents/notes/proposed/simplification/2026-07-26-builtin-timer-promises-for-hand-rolled-sleeps.md
+++ b/.agents/notes/rejected/simplification/2026-07-26-builtin-timer-promises-for-hand-rolled-sleeps.md
@@ -1,6 +1,6 @@
 # Agent Note: Use node:timers/promises for hand-rolled cancellable sleeps
 
-Status: proposed
+Status: rejected — implementation (PR #679) falsified the parity premise: vitest's fake clock does not intercept `node:timers/promises`, so the swap costs deterministic fast tests for ~10 deleted lines
 
 English | [中文](2026-07-26-builtin-timer-promises-for-hand-rolled-sleeps.zh.md)
 
diff --git a/.agents/notes/proposed/simplification/2026-07-26-builtin-timer-promises-for-hand-rolled-sleeps.zh.md b/.agents/notes/rejected/simplification/2026-07-26-builtin-timer-promises-for-hand-rolled-sleeps.zh.md
similarity index 93%
rename from .agents/notes/proposed/simplification/2026-07-26-builtin-timer-promises-for-hand-rolled-sleeps.zh.md
rename to .agents/notes/rejected/simplification/2026-07-26-builtin-timer-promises-for-hand-rolled-sleeps.zh.md
index 742d2c5ee8..47b20fdb23 100644
--- a/.agents/notes/proposed/simplification/2026-07-26-builtin-timer-promises-for-hand-rolled-sleeps.zh.md
+++ b/.agents/notes/rejected/simplification/2026-07-26-builtin-timer-promises-for-hand-rolled-sleeps.zh.md
@@ -1,6 +1,6 @@
 # Agent Note: 用 node:timers/promises 替代手写的可取消休眠
 
-Status: proposed
+Status: rejected — 实现（PR #679）证伪了行为等价前提：vitest 的假时钟不拦截 `node:timers/promises`，这次替换用确定性的快速测试换来约 10 行删除，得不偿失
 
 [English](2026-07-26-builtin-timer-promises-for-hand-rolled-sleeps.md) | 中文