feat: Add commit SHA tracking to version.json for precise version identification

**Version Tracking Enhancement**:
- Add commit_sha field to version.json for distinguishing development versions
- Auto-detect commit SHA from downloaded repository using git rev-parse
- Fallback to GitHub API if git is unavailable
- Update both PowerShell and Bash installers

**version.json Structure**:
```json
{
  "version": "3.4.1",
  "commit_sha": "9a49a86",
  "installation_mode": "Global",
  "installation_path": "...",
  "installation_date_utc": "...",
  "source_branch": "main",
  "installer_version": "2.2.0"
}
```

**Benefits**:
- /version command can precisely identify installed version
- Distinguish between stable releases and development builds
- Track exact commit for debugging and support

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Install-Claude.ps1

@@ -63,7 +63,9 @@ param(
 
     [string]$SourceVersion = "",
 
-    [string]$SourceBranch = ""
+    [string]$SourceBranch = "",
+
+    [string]$SourceCommit = ""
 )
 
 # Set encoding for proper Unicode support
@@ -651,10 +653,12 @@ function Create-VersionJson {
     # Determine version from source parameter (passed from install-remote.ps1)
     $versionNumber = if ($SourceVersion) { $SourceVersion } else { $DefaultVersion }
     $sourceBranch = if ($SourceBranch) { $SourceBranch } else { "unknown" }
+    $commitSha = if ($SourceCommit) { $SourceCommit } else { "unknown" }
 
     # Create version.json content
     $versionInfo = @{
         version = $versionNumber
+        commit_sha = $commitSha
         installation_mode = $InstallationMode
         installation_path = $TargetClaudeDir
         installation_date_utc = (Get-Date).ToUniversalTime().ToString("yyyy-MM-ddTHH:mm:ssZ")
@@ -666,7 +670,7 @@ function Create-VersionJson {
 
     try {
         $versionInfo | ConvertTo-Json | Out-File -FilePath $versionJsonPath -Encoding utf8 -Force
-        Write-ColorOutput "Created version.json: $versionNumber ($InstallationMode)" $ColorSuccess
+        Write-ColorOutput "Created version.json: $versionNumber ($commitSha) - $InstallationMode" $ColorSuccess
         return $true
     } catch {
         Write-ColorOutput "WARNING: Failed to create version.json: $($_.Exception.Message)" $ColorWarning

install-remote.ps1

@@ -260,7 +260,8 @@ function Invoke-LocalInstaller {
     param(
         [string]$RepoDir,
         [string]$VersionInfo = "",
-        [string]$BranchInfo = ""
+        [string]$BranchInfo = "",
+        [string]$CommitSha = ""
     )
 
     $installerPath = Join-Path $RepoDir "Install-Claude.ps1"
@@ -285,9 +286,10 @@ function Invoke-LocalInstaller {
     if ($NonInteractive) { $params["NonInteractive"] = $NonInteractive }
     if ($BackupAll) { $params["BackupAll"] = $BackupAll }
 
-    # Pass version and branch information
+    # Pass version, branch, and commit information
     if ($VersionInfo) { $params["SourceVersion"] = $VersionInfo }
     if ($BranchInfo) { $params["SourceBranch"] = $BranchInfo }
+    if ($CommitSha) { $params["SourceCommit"] = $CommitSha }
 
     try {
         # Change to repo directory and run installer
@@ -564,6 +566,8 @@ function Main {
 
         # Determine version and branch information to pass
         $versionToPass = ""
+        $commitSha = ""
+
         if ($Tag) {
             # Specific tag version
             $versionToPass = $Tag -replace '^v', ''  # Remove 'v' prefix
@@ -580,12 +584,30 @@ function Main {
             $versionToPass = "latest"
         }
 
+        # Get commit SHA from the downloaded repository
+        try {
+            Push-Location $repoDir
+            $commitSha = (git rev-parse --short HEAD 2>$null)
+            if (-not $commitSha) {
+                # Fallback: try to get from GitHub API
+                $commitUrl = "https://api.github.com/repos/catlog22/Claude-Code-Workflow/commits/$Branch"
+                $commitResponse = Invoke-RestMethod -Uri $commitUrl -UseBasicParsing -TimeoutSec 5 -ErrorAction SilentlyContinue
+                if ($commitResponse.sha) {
+                    $commitSha = $commitResponse.sha.Substring(0, 7)
+                }
+            }
+            Pop-Location
+        } catch {
+            Pop-Location
+            $commitSha = "unknown"
+        }
+
         $branchToPass = if ($Version -eq "branch") { $Branch } elseif ($Version -eq "latest") { "main" } elseif ($Tag) { $Tag } else { "main" }
 
-        Write-ColorOutput "Version info: $versionToPass (branch: $branchToPass)" $ColorInfo
+        Write-ColorOutput "Version info: $versionToPass (branch: $branchToPass, commit: $commitSha)" $ColorInfo
 
         # Run local installer with version information
-        $success = Invoke-LocalInstaller -RepoDir $repoDir -VersionInfo $versionToPass -BranchInfo $branchToPass
+        $success = Invoke-LocalInstaller -RepoDir $repoDir -VersionInfo $versionToPass -BranchInfo $branchToPass -CommitSha $commitSha
         if (-not $success) {
             throw "Installation script failed"
         }

install-remote.sh

@@ -211,6 +211,7 @@ function invoke_local_installer() {
     local repo_dir="$1"
     local version_info="$2"
     local branch_info="$3"
+    local commit_sha="$4"
     local installer_path="${repo_dir}/Install-Claude.sh"
 
     # Make installer executable
@@ -251,7 +252,7 @@ function invoke_local_installer() {
         params+=("-BackupAll")
     fi
 
-    # Pass version and branch information
+    # Pass version, branch, and commit information
     if [ -n "$version_info" ]; then
         params+=("-SourceVersion" "$version_info")
     fi
@@ -260,6 +261,10 @@ function invoke_local_installer() {
         params+=("-SourceBranch" "$branch_info")
     fi
 
+    if [ -n "$commit_sha" ]; then
+        params+=("-SourceCommit" "$commit_sha")
+    fi
+
     # Execute installer
     if (cd "$repo_dir" && "$installer_path" "${params[@]}"); then
         return 0
@@ -646,6 +651,7 @@ function main() {
             # Determine version and branch information to pass
             local version_to_pass=""
             local branch_to_pass=""
+            local commit_sha=""
 
             if [ -n "$TAG_VERSION" ]; then
                 # Specific tag version - remove 'v' prefix
@@ -674,10 +680,19 @@ function main() {
                 branch_to_pass="main"
             fi
 
-            write_color "Version info: $version_to_pass (branch: $branch_to_pass)" "$COLOR_INFO"
+            # Get commit SHA from the downloaded repository
+            if command -v git &> /dev/null && [ -d "$repo_dir/.git" ]; then
+                commit_sha=$(cd "$repo_dir" && git rev-parse --short HEAD 2>/dev/null || echo "unknown")
+            else
+                # Fallback: try to get from GitHub API
+                commit_sha=$(curl -fsSL "https://api.github.com/repos/catlog22/Claude-Code-Workflow/commits/$branch_to_pass" 2>/dev/null | grep -o '"sha": *"[^"]*"' | head -1 | cut -d'"' -f4 | cut -c1-7)
+                [ -z "$commit_sha" ] && commit_sha="unknown"
+            fi
+
+            write_color "Version info: $version_to_pass (branch: $branch_to_pass, commit: $commit_sha)" "$COLOR_INFO"
 
             # Run local installer with version information
-            if invoke_local_installer "$repo_dir" "$version_to_pass" "$branch_to_pass"; then
+            if invoke_local_installer "$repo_dir" "$version_to_pass" "$branch_to_pass" "$commit_sha"; then
                 success=true
                 echo ""
                 write_color "✓ Remote installation completed successfully!" "$COLOR_SUCCESS"