diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 7f438d0a2e3..2c578bf23f0 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -359,7 +359,7 @@ importers:
         version: 10.6.2
       openclaw:
         specifier: '>=2026.3.11'
-        version: 2026.3.13(@napi-rs/canvas@0.1.95)(@types/express@5.0.6)(audio-decode@2.2.3)(jimp@1.6.0)(node-llama-cpp@3.16.2(typescript@5.9.3))
+        version: 2026.3.13(@discordjs/opus@0.10.0)(@napi-rs/canvas@0.1.95)(@types/express@5.0.6)(audio-decode@2.2.3)(jimp@1.6.0)(node-llama-cpp@3.16.2(typescript@5.9.3))
 
   extensions/huggingface: {}
 
@@ -430,7 +430,7 @@ importers:
     dependencies:
       openclaw:
         specifier: '>=2026.3.11'
-        version: 2026.3.13(@napi-rs/canvas@0.1.95)(@types/express@5.0.6)(audio-decode@2.2.3)(jimp@1.6.0)(node-llama-cpp@3.16.2(typescript@5.9.3))
+        version: 2026.3.13(@discordjs/opus@0.10.0)(@napi-rs/canvas@0.1.95)(@types/express@5.0.6)(audio-decode@2.2.3)(jimp@1.6.0)(node-llama-cpp@3.16.2(typescript@5.9.3))
 
   extensions/memory-lancedb:
     dependencies:
@@ -7482,7 +7482,7 @@ snapshots:
     dependencies:
       css-tree: 3.2.1
 
-  '@buape/carbon@0.0.0-beta-20260216184201(hono@4.12.8)(opusscript@0.1.1)':
+  '@buape/carbon@0.0.0-beta-20260216184201(@discordjs/opus@0.10.0)(hono@4.12.8)(opusscript@0.1.1)':
     dependencies:
       '@types/node': 25.5.0
       discord-api-types: 0.38.37
@@ -12403,11 +12403,11 @@ snapshots:
       ws: 8.19.0
       zod: 4.3.6
 
-  openclaw@2026.3.13(@napi-rs/canvas@0.1.95)(@types/express@5.0.6)(audio-decode@2.2.3)(jimp@1.6.0)(node-llama-cpp@3.16.2(typescript@5.9.3)):
+  openclaw@2026.3.13(@discordjs/opus@0.10.0)(@napi-rs/canvas@0.1.95)(@types/express@5.0.6)(audio-decode@2.2.3)(jimp@1.6.0)(node-llama-cpp@3.16.2(typescript@5.9.3)):
     dependencies:
       '@agentclientprotocol/sdk': 0.16.1(zod@4.3.6)
       '@aws-sdk/client-bedrock': 3.1009.0
-      '@buape/carbon': 0.0.0-beta-20260216184201(hono@4.12.8)(opusscript@0.1.1)
+      '@buape/carbon': 0.0.0-beta-20260216184201(@discordjs/opus@0.10.0)(hono@4.12.8)(opusscript@0.1.1)
       '@clack/prompts': 1.1.0
       '@discordjs/voice': 0.19.2(@discordjs/opus@0.10.0)(opusscript@0.1.1)
       '@grammyjs/runner': 2.0.3(grammy@1.41.1)
diff --git a/src/auto-reply/reply/memory-flush.ts b/src/auto-reply/reply/memory-flush.ts
index 95f6dbaa053..5d68d55d45a 100644
--- a/src/auto-reply/reply/memory-flush.ts
+++ b/src/auto-reply/reply/memory-flush.ts
@@ -167,6 +167,8 @@ export function resolveMemoryFlushContextWindowTokens(params: {
   );
 }
 
+const _warnedReserve = new Set<string>();
+
 export function shouldRunMemoryFlush(params: {
   entry?: Pick<
     SessionEntry,
@@ -197,9 +199,18 @@ export function shouldRunMemoryFlush(params: {
     return false;
   }
   const contextWindow = Math.max(1, Math.floor(params.contextWindowTokens));
-  const reserveTokens = Math.max(0, Math.floor(params.reserveTokensFloor));
   const softThreshold = Math.max(0, Math.floor(params.softThresholdTokens));
-  const threshold = Math.max(0, contextWindow - reserveTokens - softThreshold);
+  const rawReserve = Math.max(0, Math.floor(params.reserveTokensFloor));
+  const maxReserve = Math.max(0, contextWindow - softThreshold - 1);
+  const warnKey = `${rawReserve}:${maxReserve}`;
+  if (rawReserve > maxReserve && !_warnedReserve.has(warnKey)) {
+    _warnedReserve.add(warnKey);
+    console.warn(
+      `reserveTokensFloor (${rawReserve}) exceeds contextWindow - softThreshold - 1 (${maxReserve}), clamping to ${maxReserve}`,
+    );
+  }
+  const reserveTokens = Math.min(rawReserve, maxReserve);
+  const threshold = contextWindow - reserveTokens - softThreshold;
   if (threshold <= 0) {
     return false;
   }
diff --git a/src/auto-reply/reply/reply-state.test.ts b/src/auto-reply/reply/reply-state.test.ts
index f83d313e2d3..0ba30d1f83b 100644
--- a/src/auto-reply/reply/reply-state.test.ts
+++ b/src/auto-reply/reply/reply-state.test.ts
@@ -357,6 +357,17 @@ describe("shouldRunMemoryFlush", () => {
       }),
     ).toBe(false);
   });
+
+  it("triggers when reserveTokensFloor equals contextWindowTokens", () => {
+    expect(
+      shouldRunMemoryFlush({
+        entry: { totalTokens: 199_000, compactionCount: 0 },
+        contextWindowTokens: 200_000,
+        reserveTokensFloor: 200_000,
+        softThresholdTokens: 4_000,
+      }),
+    ).toBe(true);
+  });
 });
 
 describe("hasAlreadyFlushedForCurrentCompaction", () => {