diff --git a/.husky/pre-push b/.husky/pre-push
new file mode 100644
index 0000000..f6b11f8
--- /dev/null
+++ b/.husky/pre-push
@@ -0,0 +1,3 @@
+bun run lint
+bun run typecheck
+bun test
diff --git a/bun.lock b/bun.lock
index d0c6b48..48bf595 100644
--- a/bun.lock
+++ b/bun.lock
@@ -11,6 +11,7 @@
       "devDependencies": {
         "@biomejs/biome": "^2.4.6",
         "@types/bun": "latest",
+        "husky": "^9.1.7",
       },
       "peerDependencies": {
         "typescript": "^5",
@@ -162,6 +163,8 @@
 
     "http-errors": ["http-errors@2.0.1", "", { "dependencies": { "depd": "~2.0.0", "inherits": "~2.0.4", "setprototypeof": "~1.2.0", "statuses": "~2.0.2", "toidentifier": "~1.0.1" } }, "sha512-4FbRdAX+bSdmo4AUFuS0WNiPz8NgFt+r8ThgNWmlrjQjt1Q7ZR9+zTlce2859x4KSXrwIsaeTqDoKQmtP8pLmQ=="],
 
+    "husky": ["husky@9.1.7", "", { "bin": { "husky": "bin.js" } }, "sha512-5gs5ytaNjBrh5Ow3zrvdUUY+0VxIuWVL4i9irt6friV+BqdCfmV11CQTWMiBYWHbXhco+J1kHfTOUkePhCDvMA=="],
+
     "iconv-lite": ["iconv-lite@0.7.2", "", { "dependencies": { "safer-buffer": ">= 2.1.2 < 3.0.0" } }, "sha512-im9DjEDQ55s9fL4EYzOAv0yMqmMBSZp6G0VvFyTMPKWxiSBHUj9NW/qqLmXUwXrrM7AvqSlTCfvqRb0cM8yYqw=="],
 
     "inherits": ["inherits@2.0.4", "", {}, "sha512-k/vGaX4/Yla3WzyMCvTQOXYeIHvqOKtnqBduzTHpzpQZzAskKMhZ2K+EnBiSM9zGSoIFeMpXKxa4dYeZIQqewQ=="],
diff --git a/package.json b/package.json
index af6d673..0feb408 100644
--- a/package.json
+++ b/package.json
@@ -10,12 +10,16 @@
     "test": "bun test",
     "lint": "bunx biome check src/ tests/",
     "lint:fix": "bunx biome check --write src/ tests/",
-    "format": "bunx biome format --write src/ tests/"
+    "format": "bunx biome format --write src/ tests/",
+    "typecheck": "bunx tsc --noEmit",
+    "prepare": "husky"
   },
   "devDependencies": {
     "@biomejs/biome": "^2.4.6",
-    "@types/bun": "latest"
+    "@types/bun": "latest",
+    "husky": "^9.1.7"
   },
+  "trustedDependencies": ["husky"],
   "peerDependencies": {
     "typescript": "^5"
   },
diff --git a/src/slack/handler.ts b/src/slack/handler.ts
index 2c5aee1..a42443d 100644
--- a/src/slack/handler.ts
+++ b/src/slack/handler.ts
@@ -4,8 +4,26 @@ import type { CCSlackConfig } from "../config";
 import { buildPrompt } from "../prompt/template";
 import type { TaskQueue } from "../queue/taskQueue";
 import { parseMessage } from "./parser";
+import type { SlackMessage } from "./responder";
 import { formatMentionReply, formatSessionInfo } from "./responder";
 
+async function postReplyOrEphemeral(
+  client: any,
+  {
+    channel,
+    threadTs,
+    user,
+    noreply,
+  }: { channel: string; threadTs: string | undefined; user: string; noreply: boolean },
+  payload: SlackMessage | { text: string },
+): Promise<void> {
+  if (noreply) {
+    await client.chat.postEphemeral({ channel, user, ...(threadTs && { thread_ts: threadTs }), ...payload });
+  } else {
+    await client.chat.postMessage({ channel, thread_ts: threadTs, ...payload });
+  }
+}
+
 export interface ResolvedRepo {
   repoName: string;
   repoPath: string;
@@ -103,10 +121,10 @@ export function createMentionHandler(config: CCSlackConfig, queue: TaskQueue) {
       return;
     }
 
-    const { repo, model, session: parsedSession, prompt } = parseMessage(event.text || "");
+    const { repo, model, session: parsedSession, noreply, prompt } = parseMessage(event.text || "");
     const resolvedModel = model ?? config.defaultModel;
     console.log(
-      `[mention] New request from ${event.user} | repo: ${repo ?? "(default)"} | model: ${resolvedModel ?? "(default)"} | prompt: "${prompt.slice(0, 80)}${prompt.length > 80 ? "..." : ""}"`,
+      `[mention] New request from ${event.user} | repo: ${repo ?? "(default)"} | model: ${resolvedModel ?? "(default)"} | noreply: ${noreply} | prompt: "${prompt.slice(0, 80)}${prompt.length > 80 ? "..." : ""}"`,
     );
 
     let resolved: ResolvedRepo;
@@ -168,15 +186,22 @@ export function createMentionHandler(config: CCSlackConfig, queue: TaskQueue) {
           .add({ channel: event.channel, timestamp: event.ts, name: result.success ? "white_check_mark" : "x" })
           .catch(() => {}),
       ]);
-      const messages = formatMentionReply(result);
-      for (const msg of messages) {
-        await client.chat.postMessage({ channel: event.channel, thread_ts: event.ts, ...msg });
+      // noreply: skip thread reply, send session info only to requester via ephemeral
+      if (!noreply) {
+        const messages = formatMentionReply(result);
+        for (const msg of messages) {
+          await client.chat.postMessage({ channel: event.channel, thread_ts: event.ts, ...msg });
+        }
       }
 
-      // Post session info for local resume
+      // Post session info
       if (sessionId) {
         const sessionMsg = formatSessionInfo(sessionId, resolved.repoPath, config.claudePath);
-        await client.chat.postMessage({ channel: event.channel, thread_ts: event.ts, ...sessionMsg });
+        await postReplyOrEphemeral(
+          client,
+          { channel: event.channel, threadTs: noreply ? event.thread_ts : event.ts, user: event.user, noreply },
+          sessionMsg,
+        );
       }
 
       const elapsed = ((Date.now() - startTime) / 1000).toFixed(1);
@@ -188,11 +213,11 @@ export function createMentionHandler(config: CCSlackConfig, queue: TaskQueue) {
           .remove({ channel: event.channel, timestamp: event.ts, name: "hourglass_flowing_sand" })
           .catch(() => {}),
         client.reactions.add({ channel: event.channel, timestamp: event.ts, name: "x" }).catch(() => {}),
-        client.chat.postMessage({
-          channel: event.channel,
-          thread_ts: event.ts,
-          text: "오류가 발생했습니다. 서버 로그를 확인해주세요.",
-        }),
+        postReplyOrEphemeral(
+          client,
+          { channel: event.channel, threadTs: noreply ? event.thread_ts : event.ts, user: event.user, noreply },
+          { text: "오류가 발생했습니다. 서버 로그를 확인해주세요." },
+        ),
       ]);
     }
   };
diff --git a/src/slack/parser.ts b/src/slack/parser.ts
index 2bc5e1b..baa1405 100644
--- a/src/slack/parser.ts
+++ b/src/slack/parser.ts
@@ -2,6 +2,7 @@ export interface ParsedMessage {
   repo: string | null;
   model: string | null;
   session: string | null;
+  noreply: boolean;
   prompt: string;
 }
 
@@ -20,7 +21,10 @@ export function parseMessage(text: string): ParsedMessage {
   const { value: model, remaining: r2 } = extractPrefix(r1, "model");
   const { value: session, remaining: r3 } = extractPrefix(r2, "session");
 
-  const prompt = r3.replace(/\s+/g, " ").trim();
+  const r4 = r3.replace(/\bnoreply\b/, "").trim();
+  const noreply = r4 !== r3;
 
-  return { repo, model, session, prompt };
+  const prompt = r4.replace(/\s+/g, " ").trim();
+
+  return { repo, model, session, noreply, prompt };
 }
diff --git a/tests/slack/parser.test.ts b/tests/slack/parser.test.ts
index 9031b8c..06db139 100644
--- a/tests/slack/parser.test.ts
+++ b/tests/slack/parser.test.ts
@@ -82,3 +82,49 @@ describe("parseMessage", () => {
     expect(result.prompt).toBe("add tests");
   });
 });
+
+describe("noreply flag", () => {
+  it("parses noreply keyword", () => {
+    const result = parseMessage("noreply repo:my-project run tests");
+    expect(result.noreply).toBe(true);
+    expect(result.repo).toBe("my-project");
+    expect(result.prompt).toBe("run tests");
+  });
+
+  it("noreply is false when not present", () => {
+    const result = parseMessage("repo:my-project run tests");
+    expect(result.noreply).toBe(false);
+  });
+
+  it("noreply works after bot mention", () => {
+    const result = parseMessage("<@U12345> noreply fix the bug");
+    expect(result.noreply).toBe(true);
+    expect(result.prompt).toBe("fix the bug");
+  });
+
+  it("noreply does not appear in prompt", () => {
+    const result = parseMessage("noreply do something");
+    expect(result.noreply).toBe(true);
+    expect(result.prompt).toBe("do something");
+    expect(result.prompt).not.toContain("noreply");
+  });
+
+  it("noreply in the middle of message", () => {
+    const result = parseMessage("run noreply tests");
+    expect(result.noreply).toBe(true);
+    expect(result.prompt).toBe("run tests");
+  });
+
+  it("noreply at the end of message", () => {
+    const result = parseMessage("run tests noreply");
+    expect(result.noreply).toBe(true);
+    expect(result.prompt).toBe("run tests");
+  });
+
+  it("noreply combined with model prefix", () => {
+    const result = parseMessage("noreply model:opus run tests");
+    expect(result.noreply).toBe(true);
+    expect(result.model).toBe("opus");
+    expect(result.prompt).toBe("run tests");
+  });
+});