diff --git a/cmd/auth/login_result.go b/cmd/auth/login_result.go
index ef288d45..0d1a3b46 100644
--- a/cmd/auth/login_result.go
+++ b/cmd/auth/login_result.go
@@ -1,3 +1,6 @@
+// Copyright (c) 2026 Lark Technologies Pte. Ltd.
+// SPDX-License-Identifier: MIT
+
 package auth
 
 import (
diff --git a/cmd/auth/login_scope_cache.go b/cmd/auth/login_scope_cache.go
index 2549c0e3..ad8036bd 100644
--- a/cmd/auth/login_scope_cache.go
+++ b/cmd/auth/login_scope_cache.go
@@ -1,3 +1,6 @@
+// Copyright (c) 2026 Lark Technologies Pte. Ltd.
+// SPDX-License-Identifier: MIT
+
 package auth
 
 import (
diff --git a/cmd/auth/login_scope_cache_test.go b/cmd/auth/login_scope_cache_test.go
index 4d0bea91..b2cc1bba 100644
--- a/cmd/auth/login_scope_cache_test.go
+++ b/cmd/auth/login_scope_cache_test.go
@@ -1,3 +1,6 @@
+// Copyright (c) 2026 Lark Technologies Pte. Ltd.
+// SPDX-License-Identifier: MIT
+
 package auth
 
 import (
diff --git a/cmd/auth/login_strict_test.go b/cmd/auth/login_strict_test.go
index 82621d55..206929bb 100644
--- a/cmd/auth/login_strict_test.go
+++ b/cmd/auth/login_strict_test.go
@@ -1,3 +1,6 @@
+// Copyright (c) 2026 Lark Technologies Pte. Ltd.
+// SPDX-License-Identifier: MIT
+
 package auth
 
 import (
diff --git a/extension/credential/env/env_test.go b/extension/credential/env/env_test.go
index 8b7af93f..2fbc7c9e 100644
--- a/extension/credential/env/env_test.go
+++ b/extension/credential/env/env_test.go
@@ -1,3 +1,6 @@
+// Copyright (c) 2026 Lark Technologies Pte. Ltd.
+// SPDX-License-Identifier: MIT
+
 package env
 
 import (
diff --git a/extension/credential/registry_test.go b/extension/credential/registry_test.go
index 1c394f51..e4ab0885 100644
--- a/extension/credential/registry_test.go
+++ b/extension/credential/registry_test.go
@@ -1,3 +1,6 @@
+// Copyright (c) 2026 Lark Technologies Pte. Ltd.
+// SPDX-License-Identifier: MIT
+
 package credential
 
 import (
diff --git a/internal/credential/credential_provider_test.go b/internal/credential/credential_provider_test.go
index aedb3d80..509e83a7 100644
--- a/internal/credential/credential_provider_test.go
+++ b/internal/credential/credential_provider_test.go
@@ -1,3 +1,6 @@
+// Copyright (c) 2026 Lark Technologies Pte. Ltd.
+// SPDX-License-Identifier: MIT
+
 package credential
 
 import (
diff --git a/internal/credential/default_provider_test.go b/internal/credential/default_provider_test.go
index f1c081cc..5aa25849 100644
--- a/internal/credential/default_provider_test.go
+++ b/internal/credential/default_provider_test.go
@@ -1,3 +1,6 @@
+// Copyright (c) 2026 Lark Technologies Pte. Ltd.
+// SPDX-License-Identifier: MIT
+
 package credential
 
 import (
diff --git a/internal/credential/integration_test.go b/internal/credential/integration_test.go
index f843c987..46a3485f 100644
--- a/internal/credential/integration_test.go
+++ b/internal/credential/integration_test.go
@@ -1,3 +1,6 @@
+// Copyright (c) 2026 Lark Technologies Pte. Ltd.
+// SPDX-License-Identifier: MIT
+
 package credential_test
 
 import (
diff --git a/internal/credential/types.go b/internal/credential/types.go
index e6b33183..54620621 100644
--- a/internal/credential/types.go
+++ b/internal/credential/types.go
@@ -1,3 +1,6 @@
+// Copyright (c) 2026 Lark Technologies Pte. Ltd.
+// SPDX-License-Identifier: MIT
+
 package credential
 
 import (
diff --git a/internal/credential/types_test.go b/internal/credential/types_test.go
index c8c8ccf5..b4feec7d 100644
--- a/internal/credential/types_test.go
+++ b/internal/credential/types_test.go
@@ -1,3 +1,6 @@
+// Copyright (c) 2026 Lark Technologies Pte. Ltd.
+// SPDX-License-Identifier: MIT
+
 package credential
 
 import (
diff --git a/internal/keychain/auth_log_test.go b/internal/keychain/auth_log_test.go
index c81fc1ff..423d2b1c 100644
--- a/internal/keychain/auth_log_test.go
+++ b/internal/keychain/auth_log_test.go
@@ -1,3 +1,6 @@
+// Copyright (c) 2026 Lark Technologies Pte. Ltd.
+// SPDX-License-Identifier: MIT
+
 package keychain
 
 import (
diff --git a/internal/keychain/keychain_darwin_test.go b/internal/keychain/keychain_darwin_test.go
index 0ae77947..5dc9ddb9 100644
--- a/internal/keychain/keychain_darwin_test.go
+++ b/internal/keychain/keychain_darwin_test.go
@@ -1,3 +1,6 @@
+// Copyright (c) 2026 Lark Technologies Pte. Ltd.
+// SPDX-License-Identifier: MIT
+
 //go:build darwin
 
 package keychain
diff --git a/internal/keychain/keychain_other_test.go b/internal/keychain/keychain_other_test.go
index a07cd881..e89d16e4 100644
--- a/internal/keychain/keychain_other_test.go
+++ b/internal/keychain/keychain_other_test.go
@@ -1,3 +1,6 @@
+// Copyright (c) 2026 Lark Technologies Pte. Ltd.
+// SPDX-License-Identifier: MIT
+
 //go:build linux
 
 package keychain
diff --git a/internal/vfs/default.go b/internal/vfs/default.go
index 5b0148c2..78b4d91a 100644
--- a/internal/vfs/default.go
+++ b/internal/vfs/default.go
@@ -1,3 +1,6 @@
+// Copyright (c) 2026 Lark Technologies Pte. Ltd.
+// SPDX-License-Identifier: MIT
+
 package vfs
 
 import (
diff --git a/internal/vfs/fs.go b/internal/vfs/fs.go
index 6ac5acd9..acaea3e1 100644
--- a/internal/vfs/fs.go
+++ b/internal/vfs/fs.go
@@ -1,3 +1,6 @@
+// Copyright (c) 2026 Lark Technologies Pte. Ltd.
+// SPDX-License-Identifier: MIT
+
 package vfs
 
 import (
diff --git a/internal/vfs/osfs.go b/internal/vfs/osfs.go
index 09a2d673..081801ae 100644
--- a/internal/vfs/osfs.go
+++ b/internal/vfs/osfs.go
@@ -1,3 +1,6 @@
+// Copyright (c) 2026 Lark Technologies Pte. Ltd.
+// SPDX-License-Identifier: MIT
+
 package vfs
 
 import (
diff --git a/internal/vfs/osfs_test.go b/internal/vfs/osfs_test.go
index 83dccd1a..ac6e592b 100644
--- a/internal/vfs/osfs_test.go
+++ b/internal/vfs/osfs_test.go
@@ -1,3 +1,6 @@
+// Copyright (c) 2026 Lark Technologies Pte. Ltd.
+// SPDX-License-Identifier: MIT
+
 package vfs
 
 import (
diff --git a/scripts/issue-labels/index.js b/scripts/issue-labels/index.js
index f0984faf..cdeec91b 100644
--- a/scripts/issue-labels/index.js
+++ b/scripts/issue-labels/index.js
@@ -1,3 +1,6 @@
+// Copyright (c) 2026 Lark Technologies Pte. Ltd.
+// SPDX-License-Identifier: MIT
+
 /*
  * Issue labeler for this repository.
  *
diff --git a/scripts/issue-labels/test.js b/scripts/issue-labels/test.js
index 4be78587..b28ca47e 100644
--- a/scripts/issue-labels/test.js
+++ b/scripts/issue-labels/test.js
@@ -1,3 +1,6 @@
+// Copyright (c) 2026 Lark Technologies Pte. Ltd.
+// SPDX-License-Identifier: MIT
+
 const fs = require("fs");
 const path = require("path");