diff --git a/README.md b/README.md
index 84732dff..0970f5d7 100644
--- a/README.md
+++ b/README.md
@@ -224,39 +224,47 @@ Each profile points to a Claude settings JSON file. Create settings files per [C
 
 ### Windows Configuration
 
-**Important**: Windows Claude CLI uses **environment variables** instead of settings files.
+**Important**: Windows Claude CLI uses **environment variables** instead of --settings flag.
 
-Config format:
+Windows uses the same file structure as Linux, but settings files contain environment variables:
 
+**Config format** (`~/.ccs/config.json`):
 ```json
 {
   "profiles": {
-    "glm": {
-      "ANTHROPIC_BASE_URL": "https://api.z.ai/api/anthropic",
-      "ANTHROPIC_AUTH_TOKEN": "your_glm_api_key",
-      "ANTHROPIC_MODEL": "glm-4.6",
-      "ANTHROPIC_DEFAULT_OPUS_MODEL": "glm-4.6",
-      "ANTHROPIC_DEFAULT_SONNET_MODEL": "glm-4.6",
-      "ANTHROPIC_DEFAULT_HAIKU_MODEL": "glm-4.6"
-    },
-    "son": {},
-    "default": {}
+    "glm": "~/.ccs/glm.settings.json",
+    "son": "~/.ccs/sonnet.settings.json",
+    "default": "~/.claude/settings.json"
   }
 }
 ```
 
-**Profile types**:
-- **With env vars** (GLM): Sets environment variables for API providers
-- **Empty object** `{}` (Claude): Uses Claude subscription (no API key needed)
-- **Empty object** `{}` (default): Uses current environment variables
+**GLM profile** (`~/.ccs/glm.settings.json`):
+```json
+{
+  "ANTHROPIC_BASE_URL": "https://api.z.ai/api/anthropic",
+  "ANTHROPIC_AUTH_TOKEN": "your_glm_api_key",
+  "ANTHROPIC_MODEL": "glm-4.6",
+  "ANTHROPIC_DEFAULT_OPUS_MODEL": "glm-4.6",
+  "ANTHROPIC_DEFAULT_SONNET_MODEL": "glm-4.6",
+  "ANTHROPIC_DEFAULT_HAIKU_MODEL": "glm-4.6"
+}
+```
 
-**Environment Variables**:
-- `ANTHROPIC_BASE_URL`: API endpoint URL
-- `ANTHROPIC_AUTH_TOKEN`: Your API key
-- `ANTHROPIC_MODEL`: Default model
-- `ANTHROPIC_DEFAULT_OPUS_MODEL`: Model for Opus-class requests
-- `ANTHROPIC_DEFAULT_SONNET_MODEL`: Model for Sonnet-class requests
-- `ANTHROPIC_DEFAULT_HAIKU_MODEL`: Model for Haiku-class requests
+**Claude profile** (`~/.ccs/sonnet.settings.json`):
+```json
+{
+  "env": {}
+}
+```
+
+**How it works**:
+- CCS reads the settings file for the selected profile
+- Temporarily sets environment variables from the settings file
+- Executes Claude CLI with those variables
+- Restores original environment variables after execution
+
+**Compatibility**: Settings files support both direct format (Windows) and `{"env": {...}}` wrapper (Linux compatibility).
 
 ## Usage
 
diff --git a/README.vi.md b/README.vi.md
index 12b71b2a..e8c1daab 100644
--- a/README.vi.md
+++ b/README.vi.md
@@ -209,33 +209,65 @@ Nếu cần tùy chỉnh:
 }
 ```
 
-**Lưu ý**: Config dùng Unix-style paths (`~/`) để tương thích đa nền tảng. Phiên bản Windows tự động chuyển đổi paths.
+### Cấu Hình macOS / Linux
 
-Mỗi profile trỏ đến một file settings JSON của Claude. Tạo file settings theo [tài liệu Claude CLI](https://docs.claude.com/en/docs/claude-code/installation).
-
-### Cấu Hình GLM Profile
-
-Installer tự động cấu hình GLM profiles với các biến môi trường nâng cao:
+Dùng file paths trỏ đến settings files:
 
 ```json
 {
-  "env": {
-    "ANTHROPIC_BASE_URL": "https://api.z.ai/api/anthropic",
-    "ANTHROPIC_AUTH_TOKEN": "GLM_API_KEY_CUA_BAN",
-    "ANTHROPIC_MODEL": "glm-4.6",
-    "ANTHROPIC_DEFAULT_OPUS_MODEL": "glm-4.6",
-    "ANTHROPIC_DEFAULT_SONNET_MODEL": "glm-4.6",
-    "ANTHROPIC_DEFAULT_HAIKU_MODEL": "glm-4.6"
+  "profiles": {
+    "glm": "~/.ccs/glm.settings.json",
+    "sonnet": "~/.ccs/sonnet.settings.json",
+    "default": "~/.claude/settings.json"
   }
 }
 ```
 
-**Các biến môi trường**:
-- `ANTHROPIC_DEFAULT_OPUS_MODEL`: Model mặc định cho requests Opus-class
-- `ANTHROPIC_DEFAULT_SONNET_MODEL`: Model mặc định cho requests Sonnet-class
-- `ANTHROPIC_DEFAULT_HAIKU_MODEL`: Model mặc định cho requests Haiku-class
+Mỗi profile trỏ đến một file settings JSON của Claude. Tạo file settings theo [tài liệu Claude CLI](https://docs.claude.com/en/docs/claude-code/installation).
 
-Các biến này đảm bảo GLM được dùng làm provider mặc định khi chuyển profiles.
+### Cấu Hình Windows
+
+**Quan trọng**: Claude CLI trên Windows dùng **biến môi trường** thay vì --settings flag.
+
+Windows dùng cùng cấu trúc file như Linux, nhưng settings files chứa environment variables:
+
+**Config format** (`~/.ccs/config.json`):
+```json
+{
+  "profiles": {
+    "glm": "~/.ccs/glm.settings.json",
+    "son": "~/.ccs/sonnet.settings.json",
+    "default": "~/.claude/settings.json"
+  }
+}
+```
+
+**GLM profile** (`~/.ccs/glm.settings.json`):
+```json
+{
+  "ANTHROPIC_BASE_URL": "https://api.z.ai/api/anthropic",
+  "ANTHROPIC_AUTH_TOKEN": "GLM_API_KEY_CUA_BAN",
+  "ANTHROPIC_MODEL": "glm-4.6",
+  "ANTHROPIC_DEFAULT_OPUS_MODEL": "glm-4.6",
+  "ANTHROPIC_DEFAULT_SONNET_MODEL": "glm-4.6",
+  "ANTHROPIC_DEFAULT_HAIKU_MODEL": "glm-4.6"
+}
+```
+
+**Claude profile** (`~/.ccs/sonnet.settings.json`):
+```json
+{
+  "env": {}
+}
+```
+
+**Cách hoạt động**:
+- CCS đọc settings file của profile được chọn
+- Tạm thời set biến môi trường từ settings file
+- Chạy Claude CLI với các biến đó
+- Khôi phục biến môi trường gốc sau khi thực thi
+
+**Tương thích**: Settings files hỗ trợ cả format trực tiếp (Windows) và wrapper `{"env": {...}}` (tương thích Linux).
 
 ## Sử Dụng
 
diff --git a/ccs.ps1 b/ccs.ps1
index fc3657f7..cdd5ef31 100644
--- a/ccs.ps1
+++ b/ccs.ps1
@@ -1,5 +1,5 @@
 # CCS - Claude Code Switch (Windows PowerShell)
-# Cross-platform Claude CLI profile switcher using environment variables
+# Cross-platform Claude CLI profile switcher
 # https://github.com/kaitranntt/ccs
 
 param(
@@ -50,10 +50,10 @@ if (-not $Config.profiles) {
     exit 1
 }
 
-# Get profile config
-$ProfileConfig = $Config.profiles.$Profile
+# Get settings path for profile
+$SettingsPath = $Config.profiles.$Profile
 
-if (-not $ProfileConfig) {
+if (-not $SettingsPath) {
     Write-Host "Error: Profile '$Profile' not found in $ConfigFile" -ForegroundColor Red
     Write-Host ""
     Write-Host "Available profiles:"
@@ -63,40 +63,59 @@ if (-not $ProfileConfig) {
     exit 1
 }
 
-# Profile config can be either a string (settings file path) or object (env vars)
-# For backward compatibility with Unix, support both formats
+# Path expansion and normalization
+# 1. Handle Unix-style tilde expansion (~/path -> %USERPROFILE%\path)
+if ($SettingsPath -match '^~[/\\]') {
+    $SettingsPath = $SettingsPath -replace '^~', $env:USERPROFILE
+}
 
-if ($ProfileConfig -is [string]) {
-    # Legacy format: path to settings file (for cross-platform configs)
-    # This won't work on Windows Claude CLI, show helpful error
-    Write-Host "Error: Windows Claude CLI doesn't support settings files." -ForegroundColor Red
+# 2. Expand Windows environment variables (%USERPROFILE%, etc.)
+$SettingsPath = [System.Environment]::ExpandEnvironmentVariables($SettingsPath)
+
+# 3. Convert forward slashes to backslashes (Unix path compatibility)
+$SettingsPath = $SettingsPath -replace '/', '\'
+
+# Validate settings file exists
+if (-not (Test-Path $SettingsPath)) {
+    Write-Host "Error: Settings file not found: $SettingsPath" -ForegroundColor Red
     Write-Host ""
-    Write-Host "Windows uses environment variables instead."
-    Write-Host "Update your profile in $ConfigFile to use this format:"
-    Write-Host ""
-    Write-Host '  "' + $Profile + '": {'
-    Write-Host '    "ANTHROPIC_AUTH_TOKEN": "your_api_key",'
-    Write-Host '    "ANTHROPIC_BASE_URL": "https://api.z.ai/api/anthropic",'
-    Write-Host '    "ANTHROPIC_MODEL": "glm-4.6"'
-    Write-Host '  }'
-    Write-Host ""
-    Write-Host "Or leave empty {} for Claude subscription (no API key needed)."
+    Write-Host "Create the settings file or update the path in $ConfigFile"
     exit 1
 }
 
-# Apply environment variables from profile
-# Save original values to restore after command execution
+# Read settings file (contains environment variables for Windows)
+try {
+    $SettingsContent = Get-Content $SettingsPath -Raw -ErrorAction Stop
+    $Settings = $SettingsContent | ConvertFrom-Json -ErrorAction Stop
+} catch {
+    Write-Host "Error: Invalid JSON in $SettingsPath" -ForegroundColor Red
+    exit 1
+}
+
+# Windows Claude CLI uses environment variables instead of --settings flag
+# Settings file contains env vars directly or nested in "env" object (Linux compat)
+
+# Check if settings contain "env" wrapper (Linux format) or direct env vars (Windows format)
+$EnvVars = if ($Settings.env) {
+    # Linux format: { "env": { "ANTHROPIC_AUTH_TOKEN": "..." } }
+    $Settings.env
+} else {
+    # Windows format: { "ANTHROPIC_AUTH_TOKEN": "..." }
+    $Settings
+}
+
+# Save original environment variables to restore after execution
 $OriginalEnvVars = @{}
 
-if ($ProfileConfig.PSObject.Properties.Count -gt 0) {
-    foreach ($Property in $ProfileConfig.PSObject.Properties) {
+if ($EnvVars.PSObject.Properties.Count -gt 0) {
+    foreach ($Property in $EnvVars.PSObject.Properties) {
         $VarName = $Property.Name
         $VarValue = $Property.Value
 
         # Save original value
         $OriginalEnvVars[$VarName] = [System.Environment]::GetEnvironmentVariable($VarName, 'Process')
 
-        # Set new value for this process
+        # Set new value for this process only
         [System.Environment]::SetEnvironmentVariable($VarName, $VarValue, 'Process')
     }
 }
diff --git a/install.ps1 b/install.ps1
index 93e7d130..7e7b21bd 100644
--- a/install.ps1
+++ b/install.ps1
@@ -198,33 +198,38 @@ Write-Host "┌─ Configuring Profiles$ProviderLabel"
 
 $NeedsGlmKey = $false
 
-# Create ccs config (Windows uses environment variables, not settings files)
+# Create ccs config with file paths (same structure as Linux)
 $ConfigFile = "$CcsDir\config.json"
 if (-not (Test-Path $ConfigFile)) {
-    # Detect if user has GLM API key set in environment
-    $HasGlmKey = $env:ANTHROPIC_AUTH_TOKEN -and $env:ANTHROPIC_BASE_URL -match "z\.ai"
-
     $ConfigContent = @{
         profiles = @{
-            glm = @{
-                ANTHROPIC_BASE_URL = "https://api.z.ai/api/anthropic"
-                ANTHROPIC_AUTH_TOKEN = if ($HasGlmKey) { $env:ANTHROPIC_AUTH_TOKEN } else { "YOUR_GLM_API_KEY_HERE" }
-                ANTHROPIC_MODEL = $GlmModel
-                ANTHROPIC_DEFAULT_OPUS_MODEL = $GlmModel
-                ANTHROPIC_DEFAULT_SONNET_MODEL = $GlmModel
-                ANTHROPIC_DEFAULT_HAIKU_MODEL = $GlmModel
-            }
-            son = @{}  # Empty = use Claude subscription (no env vars needed)
-            default = @{}  # Empty = use current environment settings
+            glm = "~/.ccs/glm.settings.json"
+            son = "~/.ccs/sonnet.settings.json"
+            default = "~/.claude/settings.json"
         }
     }
 
     $ConfigContent | ConvertTo-Json -Depth 10 | Set-Content $ConfigFile
     Write-Host "|  [OK] Config -> $env:USERPROFILE\.ccs\config.json"
+}
 
-    if (-not $HasGlmKey) {
+# Create profile settings files
+$GlmSettings = "$CcsDir\glm.settings.json"
+$SonnetSettings = "$CcsDir\sonnet.settings.json"
+
+if (-not (Test-Path $GlmSettings)) {
+    New-GlmProfile -Provider $CurrentProvider
+    if ($CurrentProvider -ne "glm") {
         $NeedsGlmKey = $true
     }
+} else {
+    Write-Host "|  [OK] GLM profile exists: $GlmSettings"
+}
+
+if (-not (Test-Path $SonnetSettings)) {
+    New-SonnetProfile -Provider $CurrentProvider
+} else {
+    Write-Host "|  [OK] Sonnet profile exists: $SonnetSettings"
 }
 
 Write-Host "└─"
@@ -254,8 +259,8 @@ if ($UserPath -notlike "*$CcsDir*") {
 if ($NeedsGlmKey) {
     Write-Host "[!]  ACTION REQUIRED"
     Write-Host ""
-    Write-Host "   Edit $env:USERPROFILE\.ccs\config.json and add your GLM API key"
-    Write-Host "   Replace YOUR_GLM_API_KEY_HERE in the 'glm' profile with your actual API key"
+    Write-Host "   Edit $env:USERPROFILE\.ccs\glm.settings.json and add your GLM API key"
+    Write-Host "   Replace YOUR_GLM_API_KEY_HERE with your actual API key"
     Write-Host ""
 }