diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 2642f2a2..06da872f 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -4,7 +4,7 @@ on:
   push:
     branches:
       - main
-      - beta
+      - dev
   workflow_dispatch:
 
 jobs:
diff --git a/.releaserc.json b/.releaserc.json
index 29c4836c..8bde2f39 100644
--- a/.releaserc.json
+++ b/.releaserc.json
@@ -1,7 +1,7 @@
 {
   "branches": [
     "main",
-    { "name": "beta", "prerelease": true }
+    { "name": "dev", "prerelease": true }
   ],
   "plugins": [
     "@semantic-release/commit-analyzer",
diff --git a/CHANGELOG.md b/CHANGELOG.md
index d3a3701d..2f925bfb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,11 @@
+## [5.4.1-dev.1](https://github.com/kaitranntt/ccs/compare/v5.4.0...v5.4.1-dev.1) (2025-12-03)
+
+
+### Bug Fixes
+
+* **cliproxy:** resolve windows auth browser not opening ([af4d6cf](https://github.com/kaitranntt/ccs/commit/af4d6cff89395a74e2eaf56551d3f56b95e0a6ce)), closes [#42](https://github.com/kaitranntt/ccs/issues/42)
+* **doctor:** resolve windows claude cli detection failure ([cfe9ba0](https://github.com/kaitranntt/ccs/commit/cfe9ba05a4351302fbb330ca00b6025cb65a8f20)), closes [#41](https://github.com/kaitranntt/ccs/issues/41)
+
 # [5.4.0](https://github.com/kaitranntt/ccs/compare/v5.3.0...v5.4.0) (2025-12-02)
 
 
diff --git a/CLAUDE.md b/CLAUDE.md
index 3935f770..6063af47 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -159,22 +159,22 @@ git commit -m "WIP"
 ### Branch Hierarchy
 
 ```
-main (production) ← beta (integration) ← feat/* | fix/* | docs/*
-     ↑                    ↑
-     │                    └── All development merges here FIRST
+main (production) ← dev (integration) ← feat/* | fix/* | docs/*
+     ↑                   ↑
+     │                   └── All development merges here FIRST
      │
-     └── Only receives: (1) Tested code from beta, (2) Hotfixes
+     └── Only receives: (1) Tested code from dev, (2) Hotfixes
 ```
 
 ### Branch Types
 
 | Branch | Purpose | Merges From | Releases To |
 |--------|---------|-------------|-------------|
-| `main` | Production-ready | `beta`, `hotfix/*` | npm `@latest` |
-| `beta` | Integration/staging | `feat/*`, `fix/*`, `docs/*` | npm `@beta` |
-| `feat/*` | New features | - | → `beta` |
-| `fix/*` | Bug fixes | - | → `beta` |
-| `docs/*` | Documentation | - | → `beta` |
+| `main` | Production-ready | `dev`, `hotfix/*` | npm `@latest` |
+| `dev` | Integration/staging | `feat/*`, `fix/*`, `docs/*` | npm `@dev` |
+| `feat/*` | New features | - | → `dev` |
+| `fix/*` | Bug fixes | - | → `dev` |
+| `docs/*` | Documentation | - | → `dev` |
 | `hotfix/*` | Critical production fixes | - | → `main` directly |
 
 ### Branch Naming Convention
@@ -189,34 +189,34 @@ docs/update-installation-guide
 hotfix/critical-auth-bug
 ```
 
-### Standard Development Workflow (Features/Fixes → Beta → Main)
+### Standard Development Workflow (Features/Fixes → Dev → Main)
 
 ```bash
-# 1. ALWAYS start from beta (integration branch)
-git checkout beta
-git pull origin beta
+# 1. ALWAYS start from dev (integration branch)
+git checkout dev
+git pull origin dev
 
-# 2. Create feature branch FROM BETA
+# 2. Create feature branch FROM DEV
 git checkout -b feat/my-feature
 
 # 3. Make changes with conventional commits
 git commit -m "feat(scope): add new feature"
 git commit -m "test(scope): add unit tests"
 
-# 4. Push and create PR to BETA (not main!)
+# 4. Push and create PR to DEV (not main!)
 git push -u origin feat/my-feature
-gh pr create --base beta --title "feat(scope): add new feature"
-# → Merge triggers npm @beta release for testing
+gh pr create --base dev --title "feat(scope): add new feature"
+# → Merge triggers npm @dev release for testing
 
-# 5. After testing in beta, promote to main (MUST use feat: or fix: prefix!)
-git checkout beta
-gh pr create --base main --title "feat(release): promote beta to main"
+# 5. After testing in dev, promote to main (MUST use feat: or fix: prefix!)
+git checkout dev
+gh pr create --base main --title "feat(release): promote dev to main"
 # → Merge triggers npm @latest release
 # WARNING: Using "chore:" will NOT trigger a release!
 
 # 6. Clean up
-git checkout beta
-git pull origin beta
+git checkout dev
+git pull origin dev
 git branch -d feat/my-feature
 ```
 
@@ -233,39 +233,39 @@ git checkout -b hotfix/critical-bug
 # 3. Fix and commit
 git commit -m "fix: critical authentication bypass"
 
-# 4. PR directly to main (skip beta)
+# 4. PR directly to main (skip dev)
 gh pr create --base main --title "fix: critical authentication bypass"
 # → Merge triggers immediate npm @latest release
 
-# 5. Sync hotfix back to beta
-git checkout beta
-git pull origin beta
+# 5. Sync hotfix back to dev
+git checkout dev
+git pull origin dev
 git merge main
-git push origin beta
+git push origin dev
 
 # 6. Clean up
 git branch -d hotfix/critical-bug
 ```
 
-### Keeping Beta in Sync with Main
+### Keeping Dev in Sync with Main
 
 ```bash
-# After any main release, sync to beta
-git checkout beta
-git pull origin beta
+# After any main release, sync to dev
+git checkout dev
+git pull origin dev
 git merge main
-git push origin beta
+git push origin dev
 ```
 
 ### Rules
 
-1. **NEVER commit directly to `main` or `beta`** - always use PRs
-2. **ALWAYS create feature branches from `beta`** (not main)
+1. **NEVER commit directly to `main` or `dev`** - always use PRs
+2. **ALWAYS create feature branches from `dev`** (not main)
 3. **Only `hotfix/*` branches go directly to `main`**
-4. **`beta` must always be up-to-date with `main`**
+4. **`dev` must always be up-to-date with `main`**
 5. **Delete feature branches after merge**
-6. **Test in `@beta` before promoting to `@latest`**
-7. **beta→main PRs MUST use `feat:` or `fix:` prefix** - `chore:` won't trigger npm release
+6. **Test in `@dev` before promoting to `@latest`**
+7. **dev→main PRs MUST use `feat:` or `fix:` prefix** - `chore:` won't trigger npm release
 
 ## Automated Releases (DO NOT MANUALLY TAG)
 
@@ -275,7 +275,7 @@ git push origin beta
 | Branch | npm Tag | When |
 |--------|---------|------|
 | `main` | `@latest` | Merge PR to main |
-| `beta` | `@beta` | Push to beta branch |
+| `dev` | `@dev` | Push to dev branch |
 
 ### What CI Does Automatically
 1. Analyzes commits since last release
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 88905c92..fe0a7c50 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -99,22 +99,22 @@ Test on all platforms before submitting PR:
 #### Branch Hierarchy
 
 ```
-main (production) ← beta (integration) ← feat/* | fix/* | docs/*
-     ↑                    ↑
-     │                    └── All contributions merge here FIRST
+main (production) ← dev (integration) ← feat/* | fix/* | docs/*
+     ↑                   ↑
+     │                   └── All contributions merge here FIRST
      │
-     └── Only: tested beta code OR hotfix/*
+     └── Only: tested dev code OR hotfix/*
 ```
 
 #### Branch Types
 
 | Branch | Purpose | PRs Target | Releases To |
 |--------|---------|------------|-------------|
-| `main` | Production | From `beta` only | npm `@latest` |
-| `beta` | Integration/testing | From `feat/*`, `fix/*` | npm `@beta` |
-| `feat/*` | New features | → `beta` | - |
-| `fix/*` | Bug fixes | → `beta` | - |
-| `docs/*` | Documentation | → `beta` | - |
+| `main` | Production | From `dev` only | npm `@latest` |
+| `dev` | Integration/testing | From `feat/*`, `fix/*` | npm `@dev` |
+| `feat/*` | New features | → `dev` | - |
+| `fix/*` | Bug fixes | → `dev` | - |
+| `docs/*` | Documentation | → `dev` | - |
 | `hotfix/*` | Critical fixes | → `main` directly | npm `@latest` |
 
 #### Branch Naming Convention
@@ -139,11 +139,11 @@ cd ccs
 # 2. Add upstream remote
 git remote add upstream https://github.com/kaitranntt/ccs.git
 
-# 3. ALWAYS start from latest BETA (not main!)
-git checkout beta
-git pull upstream beta
+# 3. ALWAYS start from latest DEV (not main!)
+git checkout dev
+git pull upstream dev
 
-# 4. Create feature branch FROM BETA
+# 4. Create feature branch FROM DEV
 git checkout -b feat/my-feature    # for features
 git checkout -b fix/bug-name       # for bug fixes
 git checkout -b docs/update-readme # for documentation
@@ -154,16 +154,16 @@ git commit -m "feat(scope): add new feature"
 # 6. Push to your fork
 git push -u origin feat/my-feature
 
-# 7. Create PR targeting BETA (not main!)
-gh pr create --base beta --title "feat(scope): add new feature"
-# → After merge, your changes release to npm @beta for testing
+# 7. Create PR targeting DEV (not main!)
+gh pr create --base dev --title "feat(scope): add new feature"
+# → After merge, your changes release to npm @dev for testing
 
-# 8. Maintainers will promote tested beta to main
+# 8. Maintainers will promote tested dev to main
 # → This triggers npm @latest release
 
 # 9. After PR merged, clean up
-git checkout beta
-git pull upstream beta
+git checkout dev
+git pull upstream dev
 git branch -d feat/my-feature
 ```
 
@@ -181,18 +181,18 @@ git checkout -b hotfix/critical-bug
 # 3. Fix and commit
 git commit -m "fix: critical security vulnerability"
 
-# 4. PR directly to main (skip beta)
+# 4. PR directly to main (skip dev)
 gh pr create --base main --title "fix: critical security vulnerability"
 
-# 5. After merge, sync to beta
+# 5. After merge, sync to dev
 # (Maintainers will handle this)
 ```
 
 #### Rules
 
-- **NEVER** commit directly to `main` or `beta`
-- **ALWAYS** create branches from `beta` (not main)
-- **ALWAYS** target PRs to `beta` (not main)
+- **NEVER** commit directly to `main` or `dev`
+- **ALWAYS** create branches from `dev` (not main)
+- **ALWAYS** target PRs to `dev` (not main)
 - **ONLY** `hotfix/*` branches target `main` directly
 - **DELETE** branches after merge
 
@@ -200,15 +200,15 @@ gh pr create --base main --title "fix: critical security vulnerability"
 
 #### Before Submitting
 
-1. Ensure branch is from `beta` (not main)
+1. Ensure branch is from `dev` (not main)
 2. Ensure branch follows naming: `feat/*`, `fix/*`, `docs/*`
 3. Run `bun run validate` - must pass
-4. Rebase on latest beta: `git rebase beta`
+4. Rebase on latest dev: `git rebase dev`
 5. Test on all platforms if possible
 
 #### Pull Request Requirements
 
-- **Target `beta` branch** (not main!) - unless hotfix
+- **Target `dev` branch** (not main!) - unless hotfix
 - Clear description of changes
 - Testing instructions if applicable
 - Link to relevant issues
@@ -401,7 +401,7 @@ Be respectful, constructive, and focused on the project's philosophy of simplici
 ### How Releases Work
 
 1. **Write conventional commits** during development
-2. **Merge PR to `main`** (or push to `beta`)
+2. **Merge PR to `main`** (or push to `dev`)
 3. **CI automatically:**
    - Analyzes commits since last release
    - Determines version bump from commit types
@@ -415,7 +415,7 @@ Be respectful, constructive, and focused on the project's philosophy of simplici
 | Branch | npm Tag | Use Case |
 |--------|---------|----------|
 | `main` | `@latest` | Stable production releases |
-| `beta` | `@beta` | Pre-release testing |
+| `dev` | `@dev` | Pre-release testing |
 
 ### Workflow
 
@@ -426,11 +426,11 @@ git commit -m "feat: add new feature"
 gh pr create --base main
 # → Merge PR → CI auto-releases to npm @latest
 
-# Beta release
-git checkout beta
+# Dev release
+git checkout dev
 git merge feat/experimental
-git push origin beta
-# → CI auto-releases to npm @beta
+git push origin dev
+# → CI auto-releases to npm @dev
 ```
 
 **NEVER DO:**
diff --git a/VERSION b/VERSION
index 8a30e8f9..ef39ed80 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-5.4.0
+5.4.1-dev.1
diff --git a/docs/version-management.md b/docs/version-management.md
index 90cd0788..45cd8ef2 100644
--- a/docs/version-management.md
+++ b/docs/version-management.md
@@ -9,14 +9,14 @@ CCS uses **semantic-release** for fully automated versioning and releases. Versi
 | Branch | npm Tag | Example | Description |
 |--------|---------|---------|-------------|
 | `main` | `@latest` | `5.1.0` | Stable production releases |
-| `beta` | `@beta` | `5.1.0-beta.1` | Pre-release testing |
+| `dev` | `@dev` | `5.1.0-dev.1` | Pre-release testing |
 
 ## How Releases Work
 
 ### Automatic Release (Default)
 
 1. **Write conventional commits** during development
-2. **Merge PR to `main`** (or push to `beta`)
+2. **Merge PR to `main`** (or push to `dev`)
 3. **CI automatically**:
    - Analyzes commits to determine version bump
    - Updates `CHANGELOG.md`
@@ -70,15 +70,15 @@ gh pr create --base main
 # 3. Merge PR → CI auto-releases to npm @latest
 ```
 
-### Beta Release
+### Dev Release
 
 ```bash
-# 1. Switch to beta branch
-git checkout beta
+# 1. Switch to dev branch
+git checkout dev
 git merge feat/experimental
 
-# 2. Push → CI auto-releases to npm @beta
-git push origin beta
+# 2. Push → CI auto-releases to npm @dev
+git push origin dev
 ```
 
 ### Installing Different Channels
@@ -87,11 +87,11 @@ git push origin beta
 # Stable (default)
 npm install -g @kaitranntt/ccs
 
-# Beta
-npm install -g @kaitranntt/ccs@beta
+# Dev
+npm install -g @kaitranntt/ccs@dev
 
 # Specific version
-npm install -g @kaitranntt/ccs@5.1.0-beta.1
+npm install -g @kaitranntt/ccs@5.1.0-dev.1
 ```
 
 ## Version Files
@@ -163,10 +163,10 @@ git commit --amend
 
 Check if commits include releasable types (`feat:`, `fix:`, `perf:`). Documentation-only commits (`docs:`) don't trigger releases.
 
-### Beta out of sync with main
+### Dev out of sync with main
 
 ```bash
-git checkout beta
+git checkout dev
 git rebase main
-git push --force-with-lease origin beta
+git push --force-with-lease origin dev
 ```
diff --git a/installers/install.ps1 b/installers/install.ps1
index 9db970c2..a24b7d9e 100644
--- a/installers/install.ps1
+++ b/installers/install.ps1
@@ -83,7 +83,7 @@ $InstallMethod = if ($ScriptDir -and ((Test-Path "$ScriptDir\lib\ccs.ps1") -or (
 # IMPORTANT: Update this version when releasing new versions!
 # This hardcoded version is used for standalone installations (irm | iex)
 # For git installations, VERSION file is read if available
-$CcsVersion = "5.4.0"
+$CcsVersion = "5.4.1-dev.1"
 
 # Try to read VERSION file for git installations
 if ($ScriptDir) {
diff --git a/installers/install.sh b/installers/install.sh
index 4e389816..5de1b2b8 100755
--- a/installers/install.sh
+++ b/installers/install.sh
@@ -84,7 +84,7 @@ fi
 # IMPORTANT: Update this version when releasing new versions!
 # This hardcoded version is used for standalone installations (curl | bash)
 # For git installations, VERSION file is read if available
-CCS_VERSION="5.4.0"
+CCS_VERSION="5.4.1-dev.1"
 
 # Try to read VERSION file for git installations
 if [[ -f "$SCRIPT_DIR/VERSION" ]]; then
diff --git a/package.json b/package.json
index 0eaf83cd..584e8de2 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@kaitranntt/ccs",
-  "version": "5.4.0",
+  "version": "5.4.1-dev.1",
   "description": "Claude Code Switch - Instant profile switching between Claude Sonnet 4.5 and GLM 4.6",
   "keywords": [
     "cli",
diff --git a/scripts/bump-version.sh b/scripts/bump-version.sh
index 2648450b..cf1df612 100755
--- a/scripts/bump-version.sh
+++ b/scripts/bump-version.sh
@@ -4,7 +4,7 @@
 #
 # Releases are now automated via semantic-release:
 #   - Merge to main  → stable release (npm @latest)
-#   - Merge to beta  → beta release (npm @beta)
+#   - Merge to dev   → dev release (npm @dev)
 #
 # Version is determined automatically from conventional commits:
 #   - feat: commit   → MINOR bump (5.0.2 → 5.1.0)
@@ -23,7 +23,7 @@ echo "============================================================="
 echo "[!] DEPRECATED: This script is for emergency use only."
 echo ""
 echo "    Releases are now automated via semantic-release."
-echo "    Simply merge to 'main' or 'beta' branch."
+echo "    Simply merge to 'main' or 'dev' branch."
 echo ""
 echo "    Version is determined from conventional commits:"
 echo "      feat: commit   -> MINOR (5.0.2 -> 5.1.0)"
diff --git a/src/cliproxy/auth-handler.ts b/src/cliproxy/auth-handler.ts
index eb027268..4a192c33 100644
--- a/src/cliproxy/auth-handler.ts
+++ b/src/cliproxy/auth-handler.ts
@@ -94,8 +94,10 @@ function isHeadlessEnvironment(): boolean {
     return true;
   }
 
-  // Non-interactive (piped stdin)
-  if (!process.stdin.isTTY) {
+  // Non-interactive (piped stdin) - skip on Windows
+  // Windows npm wrappers don't set isTTY correctly (returns undefined, not true)
+  // Windows desktop environments always have browser capability
+  if (process.platform !== 'win32' && !process.stdin.isTTY) {
     return true;
   }
 
diff --git a/src/commands/help-command.ts b/src/commands/help-command.ts
index edac032a..8c065226 100644
--- a/src/commands/help-command.ts
+++ b/src/commands/help-command.ts
@@ -1,7 +1,11 @@
+import * as fs from 'fs';
+import * as path from 'path';
 import { initUI, box, color, dim, sectionHeader, subheader } from '../utils/ui';
 
-// Version is read from VERSION file during build
-const VERSION = '5.3.0';
+// Get version from package.json (same as version-command.ts)
+const VERSION = JSON.parse(
+  fs.readFileSync(path.join(__dirname, '../../package.json'), 'utf8')
+).version;
 
 /**
  * Print a major section with ═══ borders (only for 3 main sections)
diff --git a/src/management/doctor.ts b/src/management/doctor.ts
index ae9a98d4..51e9f5c8 100644
--- a/src/management/doctor.ts
+++ b/src/management/doctor.ts
@@ -6,7 +6,8 @@ import * as fs from 'fs';
 import * as path from 'path';
 import * as os from 'os';
 import { spawn } from 'child_process';
-import { detectClaudeCli } from '../utils/claude-detector';
+import { getClaudeCliInfo } from '../utils/claude-detector';
+import { escapeShellArg } from '../utils/shell-executor';
 import { initUI, header, box, table, color, ok, fail, warn, info } from '../utils/ui';
 import packageJson from '../../package.json';
 import {
@@ -180,9 +181,9 @@ class Doctor {
   private async checkClaudeCli(): Promise<void> {
     const spinner = ora('Checking Claude CLI').start();
 
-    const claudeCli = detectClaudeCli();
+    const cliInfo = getClaudeCliInfo();
 
-    if (!claudeCli) {
+    if (!cliInfo) {
       spinner.fail();
       console.log(`  ${fail('Claude CLI'.padEnd(22))}  Not found in PATH`);
       this.results.addCheck(
@@ -195,13 +196,23 @@ class Doctor {
       return;
     }
 
+    const { path: claudeCli, needsShell } = cliInfo;
+
     // Try to execute claude --version
     try {
       const result = await new Promise<string>((resolve, reject) => {
-        const child = spawn(claudeCli, ['--version'], {
-          stdio: 'pipe',
-          timeout: 5000,
-        });
+        // When shell is needed (Windows .cmd/.bat files), concatenate into string
+        // to avoid DEP0190 warning about passing args with shell: true
+        const child = needsShell
+          ? spawn([claudeCli, '--version'].map(escapeShellArg).join(' '), {
+              stdio: 'pipe',
+              timeout: 5000,
+              shell: true,
+            })
+          : spawn(claudeCli, ['--version'], {
+              stdio: 'pipe',
+              timeout: 5000,
+            });
 
         let output = '';
         child.stdout?.on('data', (data: Buffer) => (output += data));