diff --git a/CHANGELOG.md b/CHANGELOG.md
index b7eba597089..88a129e1d68 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -68,6 +68,7 @@ Docs: https://docs.openclaw.ai
 - Discord: prefer gateway guild id when logging inbound messages so cached-miss guilds do not appear as `guild=dm`. Thanks @thewilloftheshadow.
 - TUI: refactor searchable select list description layout and add regression coverage for ANSI-highlight width bounds.
 - Memory/QMD: cap QMD command output buffering to prevent memory exhaustion from pathological `qmd` command output.
+- Memory/QMD: parse qmd scope keys once per request to avoid repeated parsing in scope checks.
 - Memory/QMD: query QMD index using exact docid matches before falling back to prefix lookup for better recall correctness and index efficiency.
 - Memory/QMD: make QMD result JSON parsing resilient to noisy command output by extracting the first JSON array from noisy `stdout`.
 - Memory/QMD: pass result limits to `search`/`vsearch` commands so QMD can cap results earlier.
diff --git a/src/memory/qmd-scope.test.ts b/src/memory/qmd-scope.test.ts
new file mode 100644
index 00000000000..8aa1f176f58
--- /dev/null
+++ b/src/memory/qmd-scope.test.ts
@@ -0,0 +1,36 @@
+import { describe, expect, it } from "vitest";
+import type { ResolvedQmdConfig } from "./backend-config.js";
+import { deriveQmdScopeChannel, deriveQmdScopeChatType, isQmdScopeAllowed } from "./qmd-scope.js";
+
+describe("qmd scope", () => {
+  const allowDirect: ResolvedQmdConfig["scope"] = {
+    default: "deny",
+    rules: [{ action: "allow", match: { chatType: "direct" } }],
+  };
+
+  it("derives channel and chat type from canonical keys once", () => {
+    expect(deriveQmdScopeChannel("Workspace:group:123")).toBe("workspace");
+    expect(deriveQmdScopeChatType("Workspace:group:123")).toBe("group");
+  });
+
+  it("derives channel and chat type from stored key suffixes", () => {
+    expect(deriveQmdScopeChannel("agent:agent-1:workspace:channel:chan-123")).toBe("workspace");
+    expect(deriveQmdScopeChatType("agent:agent-1:workspace:channel:chan-123")).toBe("channel");
+  });
+
+  it("treats parsed keys with no chat prefix as direct", () => {
+    expect(deriveQmdScopeChannel("agent:agent-1:peer-direct")).toBeUndefined();
+    expect(deriveQmdScopeChatType("agent:agent-1:peer-direct")).toBe("direct");
+    expect(isQmdScopeAllowed(allowDirect, "agent:agent-1:peer-direct")).toBe(true);
+    expect(isQmdScopeAllowed(allowDirect, "agent:agent-1:peer:group:abc")).toBe(false);
+  });
+
+  it("applies scoped key-prefix checks against normalized key", () => {
+    const scope: ResolvedQmdConfig["scope"] = {
+      default: "deny",
+      rules: [{ action: "allow", match: { keyPrefix: "workspace:" } }],
+    };
+    expect(isQmdScopeAllowed(scope, "agent:agent-1:workspace:group:123")).toBe(true);
+    expect(isQmdScopeAllowed(scope, "agent:agent-1:other:group:123")).toBe(false);
+  });
+});
diff --git a/src/memory/qmd-scope.ts b/src/memory/qmd-scope.ts
index 9fc03abf03e..da1bdcfc0e6 100644
--- a/src/memory/qmd-scope.ts
+++ b/src/memory/qmd-scope.ts
@@ -1,13 +1,20 @@
 import type { ResolvedQmdConfig } from "./backend-config.js";
 import { parseAgentSessionKey } from "../sessions/session-key-utils.js";
 
+type ParsedQmdSessionScope = {
+  channel?: string;
+  chatType?: "channel" | "group" | "direct";
+  normalizedKey?: string;
+};
+
 export function isQmdScopeAllowed(scope: ResolvedQmdConfig["scope"], sessionKey?: string): boolean {
   if (!scope) {
     return true;
   }
-  const channel = deriveQmdScopeChannel(sessionKey);
-  const chatType = deriveQmdScopeChatType(sessionKey);
-  const normalizedKey = sessionKey ?? "";
+  const parsed = parseQmdSessionScope(sessionKey);
+  const channel = parsed.channel;
+  const chatType = parsed.chatType;
+  const normalizedKey = parsed.normalizedKey ?? "";
   for (const rule of scope.rules ?? []) {
     if (!rule) {
       continue;
@@ -29,38 +36,42 @@ export function isQmdScopeAllowed(scope: ResolvedQmdConfig["scope"], sessionKey?
 }
 
 export function deriveQmdScopeChannel(key?: string): string | undefined {
-  if (!key) {
-    return undefined;
-  }
+  return parseQmdSessionScope(key).channel;
+}
+
+export function deriveQmdScopeChatType(key?: string): "channel" | "group" | "direct" | undefined {
+  return parseQmdSessionScope(key).chatType;
+}
+
+function parseQmdSessionScope(key?: string): ParsedQmdSessionScope {
   const normalized = normalizeQmdSessionKey(key);
   if (!normalized) {
-    return undefined;
+    return {};
   }
   const parts = normalized.split(":").filter(Boolean);
+  let chatType: ParsedQmdSessionScope["chatType"];
   if (
     parts.length >= 2 &&
     (parts[1] === "group" || parts[1] === "channel" || parts[1] === "direct" || parts[1] === "dm")
   ) {
-    return parts[0]?.toLowerCase();
-  }
-  return undefined;
-}
-
-export function deriveQmdScopeChatType(key?: string): "channel" | "group" | "direct" | undefined {
-  if (!key) {
-    return undefined;
-  }
-  const normalized = normalizeQmdSessionKey(key);
-  if (!normalized) {
-    return undefined;
+    if (parts.includes("group")) {
+      chatType = "group";
+    } else if (parts.includes("channel")) {
+      chatType = "channel";
+    }
+    return {
+      normalizedKey: normalized,
+      channel: parts[0]?.toLowerCase(),
+      chatType: chatType ?? "direct",
+    };
   }
   if (normalized.includes(":group:")) {
-    return "group";
+    return { normalizedKey: normalized, chatType: "group" };
   }
   if (normalized.includes(":channel:")) {
-    return "channel";
+    return { normalizedKey: normalized, chatType: "channel" };
   }
-  return "direct";
+  return { normalizedKey: normalized, chatType: "direct" };
 }
 
 function normalizeQmdSessionKey(key: string): string | undefined {