diff --git a/.changeset/yolo-temp-approval.md b/.changeset/yolo-temp-approval.md
new file mode 100644
index 0000000..b76cee1
--- /dev/null
+++ b/.changeset/yolo-temp-approval.md
@@ -0,0 +1,9 @@
+---
+"@moonshot-ai/agent-core": patch
+"@moonshot-ai/kaos": patch
+"@moonshot-ai/kimi-code": patch
+---
+
+Allow temp directory access outside workspace in yolo mode without approval.
+
+Add `gettmpdir()` method to the `Kaos` interface and its implementations (`LocalKaos` and `SSHKaos`).
diff --git a/packages/agent-core/src/agent/permission/policies/yolo-workspace-access.ts b/packages/agent-core/src/agent/permission/policies/yolo-workspace-access.ts
index b95b954..9125b20 100644
--- a/packages/agent-core/src/agent/permission/policies/yolo-workspace-access.ts
+++ b/packages/agent-core/src/agent/permission/policies/yolo-workspace-access.ts
@@ -1,6 +1,7 @@
 import type { ToolInputDisplay } from '../../../tools/display';
 import {
   DEFAULT_WORKSPACE_ACCESS_POLICY,
+  isWithinDirectory,
   resolvePathAccess,
   type PathAccessOperation,
 } from '../../../tools/policies/path-access';
@@ -55,6 +56,14 @@ export const YoloOutsideWorkspacePermissionPolicy: PermissionPolicy = {
     }
 
     if (!access.outsideWorkspace) return undefined;
+
+    // In yolo mode, temp directory access does not require approval
+    const kaos = agent.runtime.kaos;
+    const pathClass = kaos.pathClass();
+    if (isWithinDirectory(access.path, kaos.gettmpdir(), pathClass)) {
+      return undefined;
+    }
+
     return {
       kind: 'ask',
       display: {
diff --git a/packages/agent-core/test/agent/harness/agent.ts b/packages/agent-core/test/agent/harness/agent.ts
index 3e57bb6..058a59e 100644
--- a/packages/agent-core/test/agent/harness/agent.ts
+++ b/packages/agent-core/test/agent/harness/agent.ts
@@ -516,6 +516,7 @@ function createResumeNoSideEffectKaos(): Kaos {
     normpath: (p: string) => p,
     gethome: () => '/home/test',
     getcwd: () => '/workspace',
+    gettmpdir: () => '/tmp',
     chdir: () => fail('chdir'),
     stat: () => fail('stat'),
     iterdir: () => fail('iterdir'),
diff --git a/packages/agent-core/test/agent/permission.test.ts b/packages/agent-core/test/agent/permission.test.ts
index 987e87b..846933e 100644
--- a/packages/agent-core/test/agent/permission.test.ts
+++ b/packages/agent-core/test/agent/permission.test.ts
@@ -389,11 +389,9 @@ describe('Permission auto mode', () => {
   );
 
   it.each([
-    ['Read', { path: '/tmp/notes.md' }, 'read'],
-    ['ReadMediaFile', { path: '/tmp/image.png' }, 'read'],
-    ['Write', { path: '/tmp/notes.md', content: 'x' }, 'write'],
-    ['Edit', { path: '/tmp/notes.md', old_string: 'a', new_string: 'b' }, 'edit'],
-    ['Grep', { pattern: 'TODO', path: '/tmp' }, 'grep'],
+    ['Read', { path: '/outside/notes.md' }, 'read'],
+    ['ReadMediaFile', { path: '/outside/image.png' }, 'read'],
+    ['Grep', { pattern: 'TODO', path: '/outside' }, 'grep'],
   ] as const)(
     'requests approval for %s outside the workspace in yolo mode',
     async (toolName, args, operation) => {
@@ -421,6 +419,28 @@ describe('Permission auto mode', () => {
     },
   );
 
+  it.each([
+    ['Read', { path: '/tmp/notes.md' }],
+    ['ReadMediaFile', { path: '/tmp/image.png' }],
+    ['Write', { path: '/tmp/notes.md', content: 'x' }],
+    ['Edit', { path: '/tmp/notes.md', old_string: 'a', new_string: 'b' }],
+    ['Grep', { pattern: 'TODO', path: '/tmp' }],
+  ] as const)(
+    'does not request approval for %s outside the workspace in yolo mode when target is temp directory',
+    async (toolName, args) => {
+      const { manager, requestApproval } = makePermissionManager(async () => ({
+        decision: 'approved',
+      }));
+      manager.setMode('yolo');
+
+      await expect(
+        manager.beforeToolCall(hookContext({ id: `call_${toolName}`, toolName, args })),
+      ).resolves.toBeUndefined();
+
+      expect(requestApproval).not.toHaveBeenCalled();
+    },
+  );
+
   it.each([
     ['Read', { path: '/workspace/notes.md' }],
     ['ReadMediaFile', { path: '/workspace/image.png' }],
@@ -504,7 +524,7 @@ describe('Permission auto mode', () => {
         hookContext({
           id: 'call_read_session',
           toolName: 'Read',
-          args: { path: '/tmp/notes.md' },
+          args: { path: '/outside/notes.md' },
         }),
       );
 
diff --git a/packages/agent-core/test/tools/fixtures/fake-kaos.ts b/packages/agent-core/test/tools/fixtures/fake-kaos.ts
index 0f6c558..b920cd9 100644
--- a/packages/agent-core/test/tools/fixtures/fake-kaos.ts
+++ b/packages/agent-core/test/tools/fixtures/fake-kaos.ts
@@ -27,6 +27,7 @@ export function createFakeKaos(overrides?: Partial<Kaos>): Kaos {
     normpath: (p: string) => p,
     gethome: () => '/home/test',
     getcwd: () => '/workspace',
+    gettmpdir: () => '/tmp',
     chdir: () => notImplemented('chdir'),
     stat: () => notImplemented('stat'),
     iterdir: () => notImplemented('iterdir'),
diff --git a/packages/kaos/src/kaos.ts b/packages/kaos/src/kaos.ts
index 252bae2..d75b2d2 100644
--- a/packages/kaos/src/kaos.ts
+++ b/packages/kaos/src/kaos.ts
@@ -22,6 +22,8 @@ export interface Kaos {
   gethome(): string;
   /** Return the current working directory. */
   getcwd(): string;
+  /** Return the temp directory for the current environment. */
+  gettmpdir(): string;
 
   // ── Directory operations (async) ────────────────────────────────────
 
diff --git a/packages/kaos/src/local.ts b/packages/kaos/src/local.ts
index d0c6795..b0ac8ec 100644
--- a/packages/kaos/src/local.ts
+++ b/packages/kaos/src/local.ts
@@ -10,7 +10,7 @@ import {
   stat,
   writeFile,
 } from 'node:fs/promises';
-import { homedir } from 'node:os';
+import { homedir, tmpdir } from 'node:os';
 import { isAbsolute, join as pathJoin, normalize } from 'node:path';
 import type { Readable, Writable } from 'node:stream';
 
@@ -176,6 +176,10 @@ export class LocalKaos implements Kaos {
     return this._cwd;
   }
 
+  gettmpdir(): string {
+    return tmpdir();
+  }
+
   /**
    * Change the working directory of this LocalKaos instance.
    *
diff --git a/packages/kaos/src/ssh.ts b/packages/kaos/src/ssh.ts
index 71a92ca..1bb31a5 100644
--- a/packages/kaos/src/ssh.ts
+++ b/packages/kaos/src/ssh.ts
@@ -429,12 +429,14 @@ export class SSHKaos implements Kaos {
   private _sftp: SFTPWrapper;
   private _home: string;
   private _cwd: string;
+  private _tmpdir: string;
 
-  private constructor(client: Client, sftp: SFTPWrapper, home: string, cwd: string) {
+  private constructor(client: Client, sftp: SFTPWrapper, home: string, cwd: string, tmpdir: string) {
     this._client = client;
     this._sftp = sftp;
     this._home = home;
     this._cwd = cwd;
+    this._tmpdir = tmpdir;
   }
 
   private _resolvePath(path: string): string {
@@ -501,7 +503,14 @@ export class SSHKaos implements Kaos {
         }
       }
 
-      return new SSHKaos(client, sftp, home, cwd);
+      let tmpdir = '/tmp';
+      try {
+        tmpdir = await sftpRealpath(sftp, '/tmp');
+      } catch {
+        // fallback to /tmp
+      }
+
+      return new SSHKaos(client, sftp, home, cwd, tmpdir);
     } catch (error) {
       client.end();
       throw error;
@@ -526,6 +535,10 @@ export class SSHKaos implements Kaos {
     return this._cwd;
   }
 
+  gettmpdir(): string {
+    return this._tmpdir;
+  }
+
   // ── Directory operations (async) ───────────────────────────────────
 
   async chdir(path: string): Promise<void> {
diff --git a/packages/kaos/test/current.test.ts b/packages/kaos/test/current.test.ts
index 92baa00..ead331b 100644
--- a/packages/kaos/test/current.test.ts
+++ b/packages/kaos/test/current.test.ts
@@ -37,6 +37,7 @@ function createMockKaos(name: string): Kaos {
     normpath: (p: string) => p,
     gethome: () => '/',
     getcwd: () => '/',
+    gettmpdir: () => '/tmp',
     chdir: async () => {},
     stat: () =>
       Promise.resolve({
diff --git a/packages/kaos/test/e2e/async-isolation.test.ts b/packages/kaos/test/e2e/async-isolation.test.ts
index 345c0db..e49bbc2 100644
--- a/packages/kaos/test/e2e/async-isolation.test.ts
+++ b/packages/kaos/test/e2e/async-isolation.test.ts
@@ -14,6 +14,7 @@ function createNamedKaos(kaosName: string): Kaos {
     normpath: (p: string) => base.normpath(p),
     gethome: () => base.gethome(),
     getcwd: () => base.getcwd(),
+    gettmpdir: () => base.gettmpdir(),
     chdir: async (p: string) => base.chdir(p),
     stat: async (p: string, opts?: { followSymlinks?: boolean }) => base.stat(p, opts),
     iterdir: (p: string) => base.iterdir(p),
diff --git a/packages/kaos/test/e2e/path-cross-platform.test.ts b/packages/kaos/test/e2e/path-cross-platform.test.ts
index adf845f..3b3bd9c 100644
--- a/packages/kaos/test/e2e/path-cross-platform.test.ts
+++ b/packages/kaos/test/e2e/path-cross-platform.test.ts
@@ -23,6 +23,9 @@ function createMockKaos(overrides: Partial<Kaos> & { name: string }): Kaos {
     getcwd(): string {
       return '/default/cwd';
     },
+    gettmpdir(): string {
+      return '/tmp';
+    },
     async chdir(): Promise<void> {
       // no-op
     },
diff --git a/packages/kaos/test/path.test.ts b/packages/kaos/test/path.test.ts
index a290c36..253dd95 100644
--- a/packages/kaos/test/path.test.ts
+++ b/packages/kaos/test/path.test.ts
@@ -17,6 +17,7 @@ function makeMockKaos(pathClass: 'posix' | 'win32', overrides: Partial<Kaos> = {
     normpath: (p: string) => (pathClass === 'win32' ? win32Path.normalize(p) : p),
     gethome: () => (pathClass === 'win32' ? 'C:\\Users\\test' : '/home/test'),
     getcwd: () => (pathClass === 'win32' ? 'C:\\work\\project' : '/work/project'),
+    gettmpdir: () => (pathClass === 'win32' ? 'C:\\Users\\test\\AppData\\Local\\Temp' : '/tmp'),
     chdir: async () => {},
     stat: async () => ({
       stMode: 0,
@@ -225,6 +226,7 @@ describe('KaosPath', () => {
         normpath: (p: string) => win32Path.normalize(p),
         gethome: () => 'C:\\Users\\test',
         getcwd: () => 'C:\\work\\project',
+        gettmpdir: () => 'C:\\Users\\test\\AppData\\Local\\Temp',
         chdir: async () => {},
         stat: async () => ({
           stMode: 0,