diff --git a/apps/memos-local-openclaw/README.md b/apps/memos-local-openclaw/README.md
index f2a9df64f..1886a8818 100644
--- a/apps/memos-local-openclaw/README.md
+++ b/apps/memos-local-openclaw/README.md
@@ -519,7 +519,8 @@ All optional — shown with defaults:
       "rrfK": 60,                 // RRF fusion constant
       "mmrLambda": 0.7,           // MMR relevance vs diversity (0-1)
       "recencyHalfLifeDays": 14,  // Time decay half-life
-      "vectorSearchMaxChunks": 0  // 0 = search all (default). Set 200000–300000 only if search is slow on huge DBs
+      "vectorSearchMaxChunks": 0, // 0 = search all (default). Set 200000–300000 only if search is slow on huge DBs
+      "autoRecallMinQueryLength": 2 // Auto-recall skips shorter normalized prompts; set 10 to ignore short acknowledgements
     },
     "dedup": {
       "similarityThreshold": 0.75,  // Cosine similarity for smart-dedup candidates (Top-5)
diff --git a/apps/memos-local-openclaw/index.ts b/apps/memos-local-openclaw/index.ts
index 5e2245198..dc969ef53 100644
--- a/apps/memos-local-openclaw/index.ts
+++ b/apps/memos-local-openclaw/index.ts
@@ -1882,8 +1882,9 @@ Groups: ${groupNames.length > 0 ? groupNames.join(", ") : "(none)"}`,
         const query = normalizeAutoRecallQuery(rawPrompt);
         recallQuery = query;
 
-        if (query.length < 2) {
-          ctx.log.debug("auto-recall: extracted query too short, skipping");
+        const autoRecallMinQueryLength = ctx.config.recall?.autoRecallMinQueryLength ?? DEFAULTS.autoRecallMinQueryLength;
+        if (query.length < autoRecallMinQueryLength) {
+          ctx.log.debug(`auto-recall: extracted query shorter than autoRecallMinQueryLength=${autoRecallMinQueryLength}, skipping`);
           return;
         }
         ctx.log.debug(`auto-recall: query="${query.slice(0, 80)}"`);
diff --git a/apps/memos-local-openclaw/src/config.ts b/apps/memos-local-openclaw/src/config.ts
index 150b09cc4..6e588f10c 100644
--- a/apps/memos-local-openclaw/src/config.ts
+++ b/apps/memos-local-openclaw/src/config.ts
@@ -66,6 +66,7 @@ export function resolveConfig(raw: Partial<MemosLocalConfig> | undefined, stateD
       mmrLambda: cfg.recall?.mmrLambda ?? DEFAULTS.mmrLambda,
       recencyHalfLifeDays: cfg.recall?.recencyHalfLifeDays ?? DEFAULTS.recencyHalfLifeDays,
       vectorSearchMaxChunks: cfg.recall?.vectorSearchMaxChunks ?? DEFAULTS.vectorSearchMaxChunks,
+      autoRecallMinQueryLength: cfg.recall?.autoRecallMinQueryLength ?? DEFAULTS.autoRecallMinQueryLength,
     },
     dedup: {
       similarityThreshold: cfg.dedup?.similarityThreshold ?? DEFAULTS.dedupSimilarityThreshold,
diff --git a/apps/memos-local-openclaw/src/types.ts b/apps/memos-local-openclaw/src/types.ts
index cb08eb1cf..31d80b001 100644
--- a/apps/memos-local-openclaw/src/types.ts
+++ b/apps/memos-local-openclaw/src/types.ts
@@ -312,6 +312,8 @@ export interface MemosLocalConfig {
     recencyHalfLifeDays?: number;
     /** Cap vector search to this many most recent chunks. 0 = no cap (search all; may get slower with 200k+ chunks). If you set a cap for performance, use a large value (e.g. 200000–300000) so older memories are still in the window; FTS always searches all. */
     vectorSearchMaxChunks?: number;
+    /** Auto-recall skips normalized prompts shorter than this many characters. */
+    autoRecallMinQueryLength?: number;
   };
   dedup?: {
     similarityThreshold?: number;
@@ -337,6 +339,7 @@ export const DEFAULTS = {
   mmrLambda: 0.7,
   recencyHalfLifeDays: 14,
   vectorSearchMaxChunks: 0,
+  autoRecallMinQueryLength: 2,
   dedupSimilarityThreshold: 0.80,
   evidenceWrapperTag: "STORED_MEMORY",
   excerptMinChars: 200,
diff --git a/apps/memos-local-openclaw/tests/auto-recall-min-query-length.test.ts b/apps/memos-local-openclaw/tests/auto-recall-min-query-length.test.ts
new file mode 100644
index 000000000..d756eefd1
--- /dev/null
+++ b/apps/memos-local-openclaw/tests/auto-recall-min-query-length.test.ts
@@ -0,0 +1,160 @@
+import { afterEach, describe, expect, it, vi } from "vitest";
+import * as fs from "fs";
+import * as os from "os";
+import * as path from "path";
+import type { MemosLocalConfig } from "../src/types";
+
+type AutoRecallHook = (
+  event: { prompt?: string; messages?: unknown[] },
+  hookCtx?: { agentId?: string; sessionKey?: string },
+) => Promise<unknown>;
+
+const noopLog = {
+  debug() {},
+  info() {},
+  warn() {},
+  error() {},
+};
+
+async function registerPluginAndGetAutoRecallHook(opts: {
+  config: Partial<MemosLocalConfig>;
+  engineSearch: ReturnType<typeof vi.fn>;
+}): Promise<AutoRecallHook> {
+  const tmpDir = fs.mkdtempSync(path.join(os.tmpdir(), "memos-auto-recall-min-query-"));
+  const handlers = new Map<string, AutoRecallHook>();
+
+  vi.doMock("../src/config", () => ({
+    buildContext: () => ({
+      stateDir: tmpDir,
+      workspaceDir: path.join(tmpDir, "workspace"),
+      config: {
+        storage: { dbPath: path.join(tmpDir, "memos.db") },
+        capture: { evidenceWrapperTag: "STORED_MEMORY" },
+        telemetry: {},
+        sharing: {
+          enabled: false,
+          role: "client",
+          hub: { port: 18800, teamName: "", teamToken: "" },
+          client: { hubAddress: "", userToken: "" },
+          capabilities: { hostEmbedding: false, hostCompletion: false, hostSkill: false },
+        },
+        skillEvolution: { autoRecallSkills: false },
+        ...opts.config,
+      },
+      log: noopLog,
+    }),
+  }));
+  vi.doMock("../src/storage/ensure-binding", () => ({ ensureSqliteBinding: () => {} }));
+  vi.doMock("../src/storage/sqlite", () => ({ SqliteStore: class {
+    recordToolCall() {}
+    recordApiLog() {}
+    close() {}
+  } }));
+  vi.doMock("../src/embedding", () => ({ Embedder: class { provider = "mock"; } }));
+  vi.doMock("../src/ingest/worker", () => ({ IngestWorker: class {
+    getTaskProcessor() { return { onTaskCompleted() {} }; }
+    enqueue() {}
+    async flush() {}
+  } }));
+  vi.doMock("../src/recall/engine", () => ({ RecallEngine: class {
+    search = opts.engineSearch;
+    async searchSkills() { return []; }
+  } }));
+  vi.doMock("../src/ingest/providers", () => ({ Summarizer: class {
+    async filterRelevant() { return null; }
+  } }));
+  vi.doMock("../src/viewer/server", () => ({ ViewerServer: class {
+    async start() { return "http://127.0.0.1:18799"; }
+    stop() {}
+    getResetToken() { return "token"; }
+  } }));
+  vi.doMock("../src/hub/server", () => ({ HubServer: class {
+    async start() { return "http://127.0.0.1:18800"; }
+    async stop() {}
+  } }));
+  vi.doMock("../src/client/hub", () => ({
+    hubGetMemoryDetail: async () => ({}),
+    hubRequestJson: async () => ({}),
+    hubSearchMemories: async () => ({ hits: [], meta: {} }),
+    hubSearchSkills: async () => ({ hits: [] }),
+    resolveHubClient: async () => ({ hubUrl: "", userToken: "", userId: "" }),
+  }));
+  vi.doMock("../src/client/connector", () => ({
+    connectToHub: async () => ({ connected: false }),
+    getHubStatus: async () => ({ connected: false }),
+  }));
+  vi.doMock("../src/client/skill-sync", () => ({
+    fetchHubSkillBundle: async () => ({}),
+    publishSkillBundleToHub: async () => ({}),
+    restoreSkillBundleFromHub: () => ({}),
+    unpublishSkillBundleFromHub: async () => ({}),
+  }));
+  vi.doMock("../src/skill/evolver", () => ({ SkillEvolver: class { async onTaskCompleted() {} } }));
+  vi.doMock("../src/skill/installer", () => ({ SkillInstaller: class {
+    getCompanionManifest() { return null; }
+    install() { return { message: "ok" }; }
+  } }));
+  vi.doMock("../src/skill/bundled-memory-guide", () => ({ MEMORY_GUIDE_SKILL_MD: "# mock" }));
+  vi.doMock("../src/telemetry", () => ({ Telemetry: class {
+    trackToolCalled() {}
+    trackAutoRecall() {}
+    trackMemoryIngested() {}
+    trackSkillInstalled() {}
+    trackSkillEvolved() {}
+    trackPluginStarted() {}
+    trackError() {}
+    async shutdown() {}
+  } }));
+
+  const pluginModule = await import("../plugin-impl");
+  pluginModule.default.register({
+    id: "memos-local-openclaw-plugin",
+    pluginConfig: {},
+    config: { plugins: { entries: { "memos-local-openclaw-plugin": {} } } },
+    resolvePath: (p: string) => path.join(tmpDir, p.replace(/^~[\\/]/, "")),
+    logger: { info() {}, warn() {} },
+    registerTool: () => {},
+    registerMemoryCapability: () => {},
+    registerService: () => {},
+    on: (name: string, handler: AutoRecallHook) => {
+      handlers.set(name, handler);
+    },
+  } as any);
+
+  const hook = handlers.get("before_prompt_build");
+  if (!hook) throw new Error("before_prompt_build hook was not registered");
+  return hook;
+}
+
+afterEach(() => {
+  vi.resetModules();
+  vi.clearAllMocks();
+});
+
+describe("auto-recall min query length", () => {
+  it("skips auto-recall search when query is shorter than configured threshold", async () => {
+    const search = vi.fn(async () => ({ hits: [], meta: {} }));
+    const hook = await registerPluginAndGetAutoRecallHook({
+      config: { recall: { autoRecallMinQueryLength: 10 } },
+      engineSearch: search,
+    });
+
+    await hook({ prompt: "继续吧" }, { agentId: "main" });
+
+    expect(search).not.toHaveBeenCalled();
+  });
+
+  it("runs auto-recall search when query reaches configured threshold", async () => {
+    const search = vi.fn(async () => ({ hits: [], meta: {} }));
+    const hook = await registerPluginAndGetAutoRecallHook({
+      config: { recall: { autoRecallMinQueryLength: 10 } },
+      engineSearch: search,
+    });
+
+    await hook({ prompt: "remember deployment rollback preference" }, { agentId: "main" });
+
+    expect(search).toHaveBeenCalledWith(expect.objectContaining({
+      query: "remember deployment rollback preference",
+    }));
+  });
+});
diff --git a/apps/memos-local-openclaw/tests/config.test.ts b/apps/memos-local-openclaw/tests/config.test.ts
index 072728b9d..65cb774f2 100644
--- a/apps/memos-local-openclaw/tests/config.test.ts
+++ b/apps/memos-local-openclaw/tests/config.test.ts
@@ -2,6 +2,21 @@ import { describe, expect, it } from "vitest";
 import { resolveConfig } from "../src/config";
 
 describe("resolveConfig", () => {
+  it("defaults autoRecallMinQueryLength to the existing two-character threshold", () => {
+    const resolved = resolveConfig(undefined, "/tmp/memos-config-test");
+
+    expect(resolved.recall?.autoRecallMinQueryLength).toBe(2);
+  });
+
+  it("preserves configured autoRecallMinQueryLength", () => {
+    const resolved = resolveConfig(
+      { recall: { autoRecallMinQueryLength: 10 } },
+      "/tmp/memos-config-test",
+    );
+
+    expect(resolved.recall?.autoRecallMinQueryLength).toBe(10);
+  });
+
   it("injects openclaw providers into existing blocks when host capabilities are enabled", () => {
     const resolved = resolveConfig(
       {
diff --git a/packages/memos-core/src/config.ts b/packages/memos-core/src/config.ts
index b2316d78c..7d255015b 100644
--- a/packages/memos-core/src/config.ts
+++ b/packages/memos-core/src/config.ts
@@ -65,6 +65,7 @@ export function resolveConfig(raw: Partial<MemosLocalConfig> | undefined, stateD
       mmrLambda: cfg.recall?.mmrLambda ?? DEFAULTS.mmrLambda,
       recencyHalfLifeDays: cfg.recall?.recencyHalfLifeDays ?? DEFAULTS.recencyHalfLifeDays,
       vectorSearchMaxChunks: cfg.recall?.vectorSearchMaxChunks ?? DEFAULTS.vectorSearchMaxChunks,
+      autoRecallMinQueryLength: cfg.recall?.autoRecallMinQueryLength ?? DEFAULTS.autoRecallMinQueryLength,
     },
     dedup: {
       similarityThreshold: cfg.dedup?.similarityThreshold ?? DEFAULTS.dedupSimilarityThreshold,
diff --git a/packages/memos-core/src/types.ts b/packages/memos-core/src/types.ts
index cb08eb1cf..31d80b001 100644
--- a/packages/memos-core/src/types.ts
+++ b/packages/memos-core/src/types.ts
@@ -312,6 +312,8 @@ export interface MemosLocalConfig {
     recencyHalfLifeDays?: number;
     /** Cap vector search to this many most recent chunks. 0 = no cap (search all; may get slower with 200k+ chunks). If you set a cap for performance, use a large value (e.g. 200000–300000) so older memories are still in the window; FTS always searches all. */
     vectorSearchMaxChunks?: number;
+    /** Auto-recall skips normalized prompts shorter than this many characters. */
+    autoRecallMinQueryLength?: number;
   };
   dedup?: {
     similarityThreshold?: number;
@@ -337,6 +339,7 @@ export const DEFAULTS = {
   mmrLambda: 0.7,
   recencyHalfLifeDays: 14,
   vectorSearchMaxChunks: 0,
+  autoRecallMinQueryLength: 2,
   dedupSimilarityThreshold: 0.80,
   evidenceWrapperTag: "STORED_MEMORY",
   excerptMinChars: 200,