diff --git a/VIBE-WORK/261031/FIX-DUA-INSTALL-IMP-PLAN.md b/VIBE-WORK/261031/FIX-DUA-INSTALL-IMP-PLAN.md
new file mode 100644
index 0000000..8d80b9b
--- /dev/null
+++ b/VIBE-WORK/261031/FIX-DUA-INSTALL-IMP-PLAN.md
@@ -0,0 +1,38 @@
+# dua 설치 스크립트 오류 수정 계획 (FIX-DUA-INSTALL-IMP-PLAN)
+
+## 1. 원인 분석
+`Byron/dua-cli` GitHub 저장소는 워크스페이스 내 라이브러리 크레이트(`dua-core-v5.0.1`, `dua-core-v5.0.0` 등)의 릴리스도 함께 발행합니다.
+기존 `install-dua.sh`는 단순히 `prerelease == false`인 첫 번째 릴리스 태그를 가져오도록 작성되어 있어, 바이너리 에셋이 전혀 없는 `dua-core-v5.0.1` 태그를 선택하고 `dua-dua-core-v5.0.1-x86_64-unknown-linux-musl.tar.gz`와 같은 존재하지 않는 다운로드 URL을 요청하여 404 에러로 실패하였습니다.
+또한 Windows용 `install-dua.ps1`은 `winget`에만 의존하고 있어, GitHub Releases에서 직접 최신 `v*` 바이너리를 다운로드하거나 폴백으로 설치하는 기능이 부족했습니다.
+
+```mermaid
+flowchart TD
+    Start([설치 시작]) --> API[GitHub Releases API 조회]
+    API --> Filter{태그가 'v*' 로 시작하고<br/>assets가 존재하는가?}
+    Filter -- No (예: dua-core-v*) --> Skip[무시하고 다음 릴리스 검사]
+    Skip --> Filter
+    Filter -- Yes (예: v2.46.0) --> Download[아키텍처별 에셋 다운로드<br/>dua-vX.Y.Z-target.tar.gz/.zip]
+    Download --> Extract[압축 해제 및 ~/.local/bin 배포]
+    Extract --> PathConfig[PATH 환경변수 등록]
+    PathConfig --> Done([설치 완료])
+```
+
+## 2. 작업 단계 및 체크리스트
+
+### 단계 1: 원인 분석 및 계획 수립
+- [x] GitHub Releases API 응답 구조 확인 (`dua-core-v*` vs `v*`)
+- [x] 실행 계획서(`VIBE-WORK/261031/FIX-DUA-INSTALL-IMP-PLAN.md`) 작성
+
+### 단계 2: `install-dua.sh` 수정
+- [x] `_json_latest_tag` 함수에서 `prerelease == false` 조건뿐만 아니라 `tag_name`이 `v`로 시작하고(`startswith("v")`) `assets` 배열이 비어있지 않은 릴리스만 선택하도록 필터 강화
+- [x] GitHub API 호출 시 User-Agent 헤더 및 Fallback 태그(`v2.46.0`) 안전장치 추가
+- [x] `bash -n install-dua.sh` 문법 검사 및 태그 추출 테스트
+
+### 단계 3: `install-dua.ps1` 개선
+- [x] GitHub Releases에서 `v*` 태그의 Windows 바이너리(`dua-{TAG}-{ARCH}-pc-windows-msvc.zip`)를 직접 다운로드하여 `$env:USERPROFILE\.local\bin`에 설치하도록 개선 (다른 스크립트들과 일관된 방식)
+- [x] PATH 환경변수 자동 등록 및 버전 확인 로직 구성
+
+### 단계 4: 완료 보고서 작성 및 Graphify 업데이트 / Git 푸시
+- [x] 완료 보고서(`VIBE-WORK/261031/FIX-DUA-INSTALL-PHASE01.md`) 작성
+- [x] `uv tool run --from graphifyy graphify update .` 실행
+- [x] Git commit 및 push
diff --git a/VIBE-WORK/261031/FIX-DUA-INSTALL-PHASE01.md b/VIBE-WORK/261031/FIX-DUA-INSTALL-PHASE01.md
new file mode 100644
index 0000000..6629f96
--- /dev/null
+++ b/VIBE-WORK/261031/FIX-DUA-INSTALL-PHASE01.md
@@ -0,0 +1,20 @@
+# dua 설치 스크립트 오류 수정 완료 보고서 (FIX-DUA-INSTALL-PHASE01)
+
+## 1. 장애 원인
+`Byron/dua-cli` GitHub 저장소에서 CLI 바이너리 릴리스(`v2.46.0` 등) 외에 내부 코어 라이브러리 릴리스(`dua-core-v5.0.1` 등, 바이너리 에셋 없음)를 함께 발행하기 시작하면서, 기존 `prerelease == false` 조건만 검사하던 로직이 `dua-core-v5.0.1` 태그를 선택하여 존재하지 않는 URL(`.../dua-dua-core-v5.0.1-...`)을 다운로드하려다 404 오류가 발생하였습니다.
+
+```mermaid
+flowchart LR
+    API[GitHub Releases API] --> Old[기존: 첫 번째 prerelease=false 선택<br/>dua-core-v5.0.1 선택됨 -> 404 에러]
+    API --> New[수정: tag_name이 'v*'로 시작하고<br/>assets가 존재하는 릴리스만 선택<br/>v2.46.0 정상 다운로드]
+```
+
+## 2. 주요 변경 사항
+
+### 2.1. `install-dua.sh`
+- `jq` 및 `python3`, `grep` 파서에서 `tag_name`이 `v`로 시작하고(`startswith("v")`) `assets` 배열이 비어있지 않은 릴리스만 필터링하도록 수정
+- GitHub API Rate Limit 등으로 실패할 경우를 대비한 `FALLBACK_TAG="v2.46.0"` 안전장치 추가
+- Linux에서 불필요하게 실패하는 배포판 패키지 매니저(`apt`, `dnf` 등에는 기본적으로 `dua-cli`가 없음) 시도 과정을 제거하고 GitHub 공식 정적 바이너리(`musl`)를 `~/.local/bin/dua`에 직접 설치하도록 개선
+
+### 2.2. `install-dua.ps1`
+- `winget` 의존성을 제거하고 GitHub Releases API에서 `v*` 태그의 Windows 아키텍처별 바이너리(`dua-{TAG}-{ARCH}-pc-windows-msvc.zip`)를 직접 다운로드하여 `$env:USERPROFILE\.local\bin\dua.exe`에 설치하고 사용자 PATH에 자동 등록하도록 개선
diff --git a/install-dua.ps1 b/install-dua.ps1
index 7824ab0..e83192d 100644
--- a/install-dua.ps1
+++ b/install-dua.ps1
@@ -1,18 +1,24 @@
 #Requires -Version 5.1
 <#
 .SYNOPSIS
-    Installs dua (Disk Usage Analyzer).
+    Installs dua (Disk Usage Analyzer) from GitHub releases.
 
 .DESCRIPTION
-    Installs dua via winget (Byron.dua-cli) on Windows.
-    dua is a fast disk usage analyzer with interactive TUI mode.
+    Auto-detects the latest CLI release (v*) from
+    https://github.com/Byron/dua-cli/releases, downloads the zip archive
+    matching your Windows architecture, and installs dua.exe into
+    $env:USERPROFILE\.local\bin.
 
     Supported platforms:
       - Windows x64 (AMD64 / Intel 64bit)
       - Windows ARM64
+      - Windows x86 (32bit)
 
-    Prerequisites:
-      - winget (Windows Package Manager) — built into Windows 10 1709+
+.PARAMETER InstallDir
+    Directory to install dua.exe. Default: $env:USERPROFILE\.local\bin
+
+.PARAMETER AddToPath
+    Whether to permanently add InstallDir to user PATH. Default: $true
 
 .EXAMPLE
     .\install-dua.ps1
@@ -26,7 +32,10 @@
 #>
 
 [CmdletBinding()]
-param()
+param(
+    [string] $InstallDir = "$env:USERPROFILE\.local\bin",
+    [bool]   $AddToPath = $true
+)
 
 Set-StrictMode -Version Latest
 $ErrorActionPreference = 'Stop'
@@ -34,6 +43,13 @@ $ErrorActionPreference = 'Stop'
 # Force TLS 1.2+ for HTTPS downloads (required on Windows 10 / PowerShell 5.1)
 [Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
 
+# ────────────────────────────────────────────
+# Constants
+# ────────────────────────────────────────────
+$REPO         = "Byron/dua-cli"
+$API_URL      = "https://api.github.com/repos/$REPO/releases"
+$FALLBACK_TAG = "v2.46.0"
+
 # ────────────────────────────────────────────
 # Utility functions
 # ────────────────────────────────────────────
@@ -43,111 +59,194 @@ function Success { Write-Host "[OK]    $args" -ForegroundColor Green }
 function ErrExit { Write-Host "[ERROR] $args" -ForegroundColor Red; exit 1 }
 
 # ────────────────────────────────────────────
-# Step 1: Install dua
+# Architecture detection
 # ────────────────────────────────────────────
-Info "Installing dua (Disk Usage Analyzer)..."
+function Get-Platform {
+    $envArch = $env:PROCESSOR_ARCHITEW6432
+    if (-not $envArch) { $envArch = $env:PROCESSOR_ARCHITECTURE }
 
-$duaCmd = Get-Command dua -ErrorAction SilentlyContinue
-if ($duaCmd) {
-    $currentVer = & dua --version 2>$null
-    if (-not $currentVer) { $currentVer = "unknown" }
-    Info "dua is already installed ($currentVer). Skipping installation."
-} else {
-    if (-not (Get-Command winget -ErrorAction SilentlyContinue)) {
-        ErrExit "winget is required. Install it from the Microsoft Store or https://learn.microsoft.com/en-us/windows/package-manager/winget/"
+    switch -Regex ($envArch) {
+        '^AMD64$' { return "x86_64-pc-windows-msvc" }
+        '^ARM64$' { return "aarch64-pc-windows-msvc" }
+        '^x86$'   { return "i686-pc-windows-msvc" }
     }
 
-    winget install --id Byron.dua-cli --accept-package-agreements --accept-source-agreements 2>&1 | Out-Null
-    Success "dua installed via winget"
-}
-
-# ────────────────────────────────────────────
-# Verify dua is available and add to PATH permanently if needed
-# ────────────────────────────────────────────
-$duaBin = $null
-
-# 1) Try current PATH
-$duaCmd = Get-Command dua -ErrorAction SilentlyContinue
-if ($duaCmd) {
-    $duaBin = $duaCmd.Source
-}
-
-# 2) Refresh PATH from registry (winget may have added paths)
-if (-not $duaBin) {
-    $env:Path = [System.Environment]::GetEnvironmentVariable('Path', 'User') + ';' + [System.Environment]::GetEnvironmentVariable('Path', 'Machine')
-    $duaCmd = Get-Command dua -ErrorAction SilentlyContinue
-    if ($duaCmd) {
-        $duaBin = $duaCmd.Source
+    try {
+        $arch = [System.Runtime.InteropServices.RuntimeInformation]::OSArchitecture
+        switch ($arch) {
+            'X64'   { return "x86_64-pc-windows-msvc" }
+            'Arm64' { return "aarch64-pc-windows-msvc" }
+            'X86'   { return "i686-pc-windows-msvc" }
+            default { ErrExit "Unsupported architecture: $arch" }
+        }
+    } catch {
+        ErrExit "Failed to detect architecture: $_"
     }
 }
 
-# 3) Search common locations where winget installs
-if (-not $duaBin) {
-    $searchDirs = @(
-        (Join-Path $env:LOCALAPPDATA 'Microsoft\WinGet\Links'),
-        (Join-Path $env:LOCALAPPDATA 'Programs\dua-cli'),
-        'C:\Program Files\dua-cli',
-        'C:\Program Files (x86)\dua-cli'
-    )
-    foreach ($dir in $searchDirs) {
-        if (Test-Path $dir) {
-            $candidate = Join-Path $dir 'dua.exe'
-            if (Test-Path $candidate) { $duaBin = $candidate; break }
+# ────────────────────────────────────────────
+# Get latest stable CLI release tag (starts with 'v')
+# ────────────────────────────────────────────
+function Get-LatestTag {
+    Info "Fetching latest dua release from GitHub API..."
+
+    try {
+        $releases = Invoke-RestMethod -Uri $API_URL -UseBasicParsing `
+            -Headers @{ 'User-Agent' = 'install-dua-ps1' } -TimeoutSec 15
+
+        # Byron/dua-cli also publishes 'dua-core-v*' library tags without binary assets.
+        # Filter only CLI releases whose tag_name starts with 'v' and have assets.
+        $latest = $releases | Where-Object {
+            $_.prerelease -eq $false -and
+            $_.tag_name -like 'v*' -and
+            $_.assets -and
+            $_.assets.Count -gt 0
+        } | Select-Object -First 1
+
+        if ($latest -and $latest.tag_name) {
+            return $latest.tag_name
+        }
+    } catch {
+        Warn "GitHub API lookup failed: $_"
+    }
+
+    Warn "Using fallback release tag: $FALLBACK_TAG"
+    return $FALLBACK_TAG
+}
+
+# ────────────────────────────────────────────
+# Build download URL
+# ────────────────────────────────────────────
+function Get-DownloadUrl {
+    param([string]$Tag, [string]$Triple)
+    $filename = "dua-${Tag}-${Triple}.zip"
+    return "https://github.com/$REPO/releases/download/$Tag/$filename"
+}
+
+# ────────────────────────────────────────────
+# Download, extract & install
+# ────────────────────────────────────────────
+function Install-Dua {
+    param([string]$Url)
+
+    $tmpDir = Join-Path $env:TEMP "dua_install_$(Get-Random)"
+    New-Item -ItemType Directory -Path $tmpDir -Force | Out-Null
+
+    try {
+        $zipPath = Join-Path $tmpDir "dua.zip"
+
+        Info "Downloading: $Url"
+        try {
+            $ProgressPreference = 'SilentlyContinue'
+            Invoke-WebRequest -Uri $Url -OutFile $zipPath -UseBasicParsing
+            $ProgressPreference = 'Continue'
+        } catch {
+            ErrExit "Download failed from $Url : $_"
+        }
+
+        Info "Extracting archive..."
+        Expand-Archive -Path $zipPath -DestinationPath $tmpDir -Force
+
+        $duaExe = Get-ChildItem -Path $tmpDir -Recurse -Filter "dua.exe" |
+                  Select-Object -First 1
+        if (-not $duaExe) {
+            ErrExit "Cannot find 'dua.exe' in the downloaded archive."
+        }
+
+        if (-not (Test-Path $InstallDir)) {
+            New-Item -ItemType Directory -Path $InstallDir -Force | Out-Null
+        }
+
+        $destPath = Join-Path $InstallDir "dua.exe"
+        Info "Installing to: $destPath"
+        Copy-Item -Path $duaExe.FullName -Destination $destPath -Force
+
+        Success "dua installed to $destPath"
+        return $destPath
+    } finally {
+        if (Test-Path $tmpDir) {
+            Remove-Item -Path $tmpDir -Recurse -Force -ErrorAction SilentlyContinue
+        }
+    }
+}
+
+# ────────────────────────────────────────────
+# Add to PATH (user environment variable)
+# ────────────────────────────────────────────
+function Add-ToUserPath {
+    param([string]$Dir)
+
+    $normalizedDir = $Dir.TrimEnd('\')
+
+    if ($env:Path -notlike "*$normalizedDir*") {
+        $env:Path = "$normalizedDir;$env:Path"
+        Info "Added $normalizedDir to current session PATH."
+    }
+
+    $currentPath = [Environment]::GetEnvironmentVariable('Path', 'User')
+    if (-not $currentPath) { $currentPath = '' }
+    $dirs = @($currentPath -split ';' | Where-Object { $_ -ne '' })
+
+    $alreadyInPath = $false
+    foreach ($d in $dirs) {
+        if ($d.Trim().TrimEnd('\') -eq $normalizedDir) {
+            $alreadyInPath = $true
+            break
         }
     }
 
-    # Recurse under WinGet/Packages for dua
-    if (-not $duaBin -and (Test-Path (Join-Path $env:LOCALAPPDATA 'Microsoft\WinGet\Packages'))) {
-        $found = Get-ChildItem -Path (Join-Path $env:LOCALAPPDATA 'Microsoft\WinGet\Packages') -Recurse -Filter 'dua.exe' -ErrorAction SilentlyContinue | Select-Object -First 1
-        if ($found) { $duaBin = $found.FullName }
-    }
-}
-
-if ($duaBin) {
-    # Add dua's directory to PATH for this session
-    $duaDir = Split-Path $duaBin
-    if ($env:Path -notlike "*$duaDir*") {
-        $env:Path = "$duaDir;$env:Path"
-        Info "Added $duaDir to PATH for this session"
-    }
-    Success "dua is available: $duaBin"
-
-    # Permanently add dua's directory to user PATH if not already there
-    $userPath = [System.Environment]::GetEnvironmentVariable('Path', 'User')
-    if ($userPath -notlike "*$duaDir*") {
-        [System.Environment]::SetEnvironmentVariable('Path', "$duaDir;$userPath", 'User')
-        Success "Added $duaDir to user PATH permanently (takes effect on next login)"
+    if (-not $alreadyInPath) {
+        $newPath = if ($currentPath) { "$normalizedDir;$currentPath" } else { $normalizedDir }
+        [Environment]::SetEnvironmentVariable('Path', $newPath, 'User')
+        Success "Added '$normalizedDir' to User PATH permanently."
+        Warn "Open a new terminal for PATH changes to take full effect."
     } else {
-        Info "$duaDir already in user PATH"
+        Info "'$normalizedDir' is already in User PATH."
     }
-} else {
-    Warn "dua was not found in PATH after installation."
-    Warn "Please restart your terminal or add dua's directory to your PATH manually."
 }
 
 # ────────────────────────────────────────────
-# Step 2: Post-install notes
+# Main
 # ────────────────────────────────────────────
-Info ""
-Info "=================================================="
-Success "dua installation complete!"
-Info "=================================================="
-if ($duaBin) {
+function Main {
+    Info "===== dua (Disk Usage Analyzer) install script (Windows PowerShell) ====="
+
+    $triple = Get-Platform
+    Info "Detected platform: $triple"
+
+    $tag = Get-LatestTag
+    Info "Release tag: $tag"
+
+    $url = Get-DownloadUrl -Tag $tag -Triple $triple
+    $duaBin = Install-Dua -Url $url
+
+    if ($AddToPath) {
+        Add-ToUserPath -Dir $InstallDir
+    } else {
+        Warn "Skipping automatic PATH registration."
+        Warn "Add to PATH manually: $InstallDir"
+    }
+
     Info ""
-    Info "dua binary: $duaBin"
+    Info "=================================================="
+    Success "dua installation complete!"
+    Info "=================================================="
+    if ($duaBin -and (Test-Path $duaBin)) {
+        $ver = & $duaBin --version 2>$null
+        Info "Installed version: $ver ($duaBin)"
+    }
+    Info ""
+    Info "Getting started:"
+    Info "  dua                     - Show disk usage of current directory"
+    Info "  dua /path/to/dir        - Show disk usage of specific directory"
+    Info "  dua i                   - Interactive mode (explore & delete)"
+    Info "  dua --help              - Show help"
+    Info ""
+    Info "Interactive mode shortcuts:"
+    Info "  Arrow keys / h/j/k/l   - Navigate"
+    Info "  ?                       - Show help"
+    Info "  d                       - Delete selected entry"
+    Info "  q / Esc                 - Quit"
 }
-Info ""
-Info "IMPORTANT: Close this terminal and open a new one to use dua."
-Info "PATH changes require a new terminal session to take effect."
-Info ""
-Info "Getting started:"
-Info "  dua                     - Show disk usage of current directory"
-Info "  dua /path/to/dir        - Show disk usage of specific directory"
-Info "  dua i                   - Interactive mode (explore & delete)"
-Info "  dua --help              - Show help"
-Info ""
-Info "Interactive mode shortcuts:"
-Info "  Arrow keys / h/j/k/l   - Navigate"
-Info "  ?                       - Show help"
-Info "  d                       - Delete selected entry"
-Info "  q / Esc                 - Quit"
\ No newline at end of file
+
+Main
\ No newline at end of file
diff --git a/install-dua.sh b/install-dua.sh
index 586c4c8..bda2e06 100755
--- a/install-dua.sh
+++ b/install-dua.sh
@@ -18,6 +18,7 @@ set -euo pipefail
 # ────────────────────────────────────────────
 REPO="Byron/dua-cli"
 API_URL="https://api.github.com/repos/${REPO}/releases"
+FALLBACK_TAG="v2.46.0"
 INSTALL_DIR="${HOME}/.local/bin"
 
 # ────────────────────────────────────────────
@@ -71,22 +72,28 @@ for cmd in curl; do
 done
 
 # Fallback: use python3 if jq is not available
+# Note: Byron/dua-cli publishes library tags like 'dua-core-v5.0.1' without binary assets.
+# Filter only CLI releases whose tag starts with 'v' and contain downloadable assets.
 if command -v jq &>/dev/null; then
 	_json_latest_tag() {
-		jq -r '[.[] | select(.prerelease==false)] | .[0].tag_name'
+		jq -r '[.[] | select(.prerelease==false and (.tag_name | startswith("v")) and (.assets | length > 0))] | .[0].tag_name'
 	}
-else
-	command -v python3 &>/dev/null || error "'jq' or 'python3' is required."
+elif command -v python3 &>/dev/null; then
 	_json_latest_tag() {
 		python3 -c "
 import sys, json
 data = json.load(sys.stdin)
 for r in data:
-    if not r.get('prerelease'):
-        print(r['tag_name'])
+    tag = r.get('tag_name', '')
+    if not r.get('prerelease') and tag.startswith('v') and r.get('assets'):
+        print(tag)
         break
 "
 	}
+else
+	_json_latest_tag() {
+		grep -oE '"tag_name":[[:space:]]*"v[0-9]+\.[0-9]+\.[0-9]+"' | head -1 | sed -E 's/.*"v/v/; s/"$//'
+	}
 fi
 
 # ────────────────────────────────────────────
@@ -95,14 +102,79 @@ fi
 get_latest_tag() {
 	info "Fetching latest release from GitHub API..."
 
-	local releases
-	releases="$(curl -fsSL "${API_URL}")" || error "Failed to call GitHub API."
+	local releases=""
+	releases="$(curl -fsSL -H "User-Agent: install-dua-sh" "${API_URL}" 2>/dev/null)" || true
+
+	local tag=""
+	if [[ -n "$releases" ]]; then
+		tag="$(echo "$releases" | _json_latest_tag 2>/dev/null || true)"
+	fi
+
+	if [[ -z "$tag" || "$tag" == "null" ]]; then
+		warn "Could not fetch latest release tag from GitHub API. Using fallback tag: ${FALLBACK_TAG}"
+		tag="${FALLBACK_TAG}"
+	fi
+	echo "$tag"
+}
+
+# ────────────────────────────────────────────
+# Install binary from GitHub releases
+# ────────────────────────────────────────────
+install_from_github() {
+	local target=""
+	case "$OS" in
+	Darwin)
+		case "$ARCH" in
+		x86_64 | amd64) target="x86_64-apple-darwin" ;;
+		aarch64 | arm64) target="aarch64-apple-darwin" ;;
+		*) error "Unsupported macOS architecture: $ARCH" ;;
+		esac
+		;;
+	Linux)
+		case "$ARCH" in
+		x86_64 | amd64) target="x86_64-unknown-linux-musl" ;;
+		aarch64 | arm64) target="aarch64-unknown-linux-musl" ;;
+		armv7l | armhf) target="arm-unknown-linux-gnueabihf" ;;
+		riscv64) target="riscv64gc-unknown-linux-gnu" ;;
+		*) error "Unsupported Linux architecture: $ARCH" ;;
+		esac
+		;;
+	esac
 
 	local tag
-	tag="$(echo "$releases" | _json_latest_tag)"
+	tag="$(get_latest_tag)"
+	local filename="dua-${tag}-${target}.tar.gz"
+	local download_url="https://github.com/${REPO}/releases/download/${tag}/${filename}"
 
-	[[ -z "$tag" || "$tag" == "null" ]] && error "Could not find latest release tag."
-	echo "$tag"
+	info "Downloading: $download_url"
+	TMPDIR="$(mktemp -d)"
+	trap '[[ -d "${TMPDIR:-}" ]] && rm -rf "$TMPDIR"' EXIT
+
+	curl -fsSL --progress-bar -o "${TMPDIR}/${filename}" "$download_url" ||
+		error "Download failed: $download_url"
+
+	info "Extracting..."
+	tar -xzf "${TMPDIR}/${filename}" -C "$TMPDIR"
+
+	# Find the dua binary
+	local dua_bin
+	dua_bin="$(find "$TMPDIR" -maxdepth 3 -type f -name "dua" | head -1)"
+	[[ -z "$dua_bin" ]] && error "Cannot find 'dua' binary in the archive."
+
+	mkdir -p "$INSTALL_DIR"
+	cp "$dua_bin" "${INSTALL_DIR}/dua"
+	chmod +x "${INSTALL_DIR}/dua"
+	export PATH="${INSTALL_DIR}:${PATH}"
+	success "dua ${tag} installed to ${INSTALL_DIR}/dua"
+
+	# PATH instructions
+	if ! grep -qs "${INSTALL_DIR}" "${HOME}/.bashrc" "${HOME}/.zshrc" 2>/dev/null; then
+		if [[ ":$PATH:" != *":${INSTALL_DIR}:"* ]]; then
+			warn "'${INSTALL_DIR}' is not in your PATH."
+		fi
+		info "Ensure '${INSTALL_DIR}' is in your PATH (e.g. ~/.bashrc or ~/.zshrc):"
+		info "  export PATH=\"\$HOME/.local/bin:\$PATH\""
+	fi
 }
 
 # ────────────────────────────────────────────
@@ -112,96 +184,24 @@ info "Installing dua (Disk Usage Analyzer)..."
 
 if command -v dua &>/dev/null; then
 	CURRENT_VER="$(dua --version 2>/dev/null || echo 'unknown')"
-	info "dua is already installed ($CURRENT_VER). Skipping installation."
-else
-	case "$OS" in
-	Darwin)
-		ensure_brew
-		brew install dua-cli
-		success "dua installed via Homebrew"
-		;;
-	Linux)
-		# Try package managers first
-		DUA_INSTALLED=false
-
-		if command -v apt-get &>/dev/null; then
-			info "Trying apt-get..."
-			sudo apt-get update -y 2>/dev/null || true
-			if sudo apt-get install -y dua-cli 2>/dev/null; then
-				DUA_INSTALLED=true
-				success "dua installed via apt-get"
-			fi
-		fi
-
-		if [ "$DUA_INSTALLED" = "false" ] && command -v dnf &>/dev/null; then
-			info "Trying dnf..."
-			if sudo dnf install -y dua-cli 2>/dev/null; then
-				DUA_INSTALLED=true
-				success "dua installed via dnf"
-			fi
-		fi
-
-		if [ "$DUA_INSTALLED" = "false" ] && command -v pacman &>/dev/null; then
-			info "Trying pacman..."
-			if sudo pacman -S --noconfirm dua-cli 2>/dev/null; then
-				DUA_INSTALLED=true
-				success "dua installed via pacman"
-			fi
-		fi
-
-		if [ "$DUA_INSTALLED" = "false" ] && command -v zypper &>/dev/null; then
-			info "Trying zypper..."
-			if sudo zypper -n install dua-cli 2>/dev/null; then
-				DUA_INSTALLED=true
-				success "dua installed via zypper"
-			fi
-		fi
-
-		# Fallback: download binary from GitHub releases
-		if [ "$DUA_INSTALLED" = "false" ]; then
-			info "No package manager had dua-cli. Downloading from GitHub releases..."
-
-			# Determine target
-			case "$ARCH" in
-			x86_64 | amd64) TARGET="x86_64-unknown-linux-musl" ;;
-			aarch64 | arm64) TARGET="aarch64-unknown-linux-musl" ;;
-			*) error "Unsupported Linux architecture: $ARCH" ;;
-			esac
-
-			TAG="$(get_latest_tag)"
-			FILENAME="dua-${TAG}-${TARGET}.tar.gz"
-			DOWNLOAD_URL="https://github.com/${REPO}/releases/download/${TAG}/${FILENAME}"
-
-			info "Downloading: $DOWNLOAD_URL"
-			TMPDIR="$(mktemp -d)"
-			trap '[[ -d "${TMPDIR:-}" ]] && rm -rf "$TMPDIR"' EXIT
-
-			curl -fsSL --progress-bar -o "${TMPDIR}/${FILENAME}" "$DOWNLOAD_URL" ||
-				error "Download failed: $DOWNLOAD_URL"
-
-			info "Extracting..."
-			tar -xzf "${TMPDIR}/${FILENAME}" -C "$TMPDIR"
-
-			# Find the dua binary
-			DUA_BIN="$(find "$TMPDIR" -maxdepth 3 -type f -name "dua" | head -1)"
-			[[ -z "$DUA_BIN" ]] && error "Cannot find 'dua' binary in the archive."
-
-			mkdir -p "$INSTALL_DIR"
-			cp "$DUA_BIN" "${INSTALL_DIR}/dua"
-			chmod +x "${INSTALL_DIR}/dua"
-			success "dua installed to ${INSTALL_DIR}/dua"
-
-			# PATH instructions
-			if ! echo ":${PATH}:" | grep -q ":${INSTALL_DIR}:"; then
-				warn "'${INSTALL_DIR}' is not in your PATH."
-				warn "Add this line to your ~/.bashrc or ~/.zshrc:"
-				warn "  export PATH=\"\$HOME/.local/bin:\$PATH\""
-			fi
-		fi
-		;;
-	esac
+	info "dua is already installed ($CURRENT_VER). Updating/checking latest version..."
 fi
 
+case "$OS" in
+Darwin)
+	if command -v brew &>/dev/null && brew install dua-cli 2>/dev/null; then
+		success "dua installed via Homebrew"
+	else
+		info "Installing dua from GitHub releases..."
+		install_from_github
+	fi
+	;;
+Linux)
+	info "Installing dua from GitHub releases..."
+	install_from_github
+	;;
+esac
+
 # Verify dua is available
 if command -v dua &>/dev/null; then
 	success "dua is available: $(command -v dua)"