feat: skip llama-server upgrade when local version matches remote

Parse the build number from `llama-server --version` output and compare
with the remote release tag. If they match, skip the download entirely.
Shows clear upgrade path info (e.g. "b8200 → b8287") when upgrading.

Made-with: Cursor

Author: ganisback

scripts/install.ps1

@@ -139,7 +139,7 @@ function Install-CsghubLite {
 function Install-LlamaServer {
     $existingLlama = Get-Command "llama-server.exe" -ErrorAction SilentlyContinue
     if ($existingLlama) {
-        Info "llama-server found at $($existingLlama.Source), upgrading to latest version..."
+        Info "llama-server found at $($existingLlama.Source)"
     } else {
         Warn "llama-server not found. It is required for model inference."
     }
@@ -168,6 +168,31 @@ function Install-LlamaServer {
     }
 
     $llamaTag = $release.tag_name
+
+    # Compare local and remote versions to skip unnecessary downloads.
+    # llama-server --version outputs: "version: <build_number> (<hash>)"
+    # Release tags use format: "b<build_number>"
+    if ($existingLlama) {
+        $localBuild = $null
+        try {
+            $verOutput = & $existingLlama.Source --version 2>&1 | Out-String
+            if ($verOutput -match 'version:\s+(\d+)') {
+                $localBuild = $Matches[1]
+            }
+        } catch {}
+
+        $remoteBuild = $llamaTag.TrimStart('b')
+        if ($localBuild -and $localBuild -eq $remoteBuild) {
+            Info "llama-server is already up to date ($llamaTag)."
+            return
+        }
+        if ($localBuild) {
+            Info "Upgrading llama-server from b$localBuild to $llamaTag..."
+        } else {
+            Info "Upgrading llama-server to $llamaTag..."
+        }
+    }
+
     Info "llama.cpp release: $llamaTag"
 
     $arch = $env:PROCESSOR_ARCHITECTURE

scripts/install.sh

@@ -141,7 +141,7 @@ get_latest_version() {
 install_llama_server() {
     _existing_llama="$(command -v llama-server 2>/dev/null || true)"
     if [ -n "$_existing_llama" ]; then
-        info "llama-server found at ${_existing_llama}, upgrading to latest version..."
+        info "llama-server found at ${_existing_llama}"
     else
         warn "llama-server not found. It is required for model inference."
     fi
@@ -164,7 +164,6 @@ install_llama_server() {
 
     OS="$(detect_os)"
     ARCH="$(detect_arch)"
-    info "Downloading llama.cpp for ${OS}/${ARCH}..."
 
     _gh_url="${GITHUB_API}/${LLAMA_CPP_REPO}/releases/latest"
     _gl_url="${GITLAB_API}/${GITLAB_LLAMA_ID}/releases/permalink/latest"
@@ -181,6 +180,25 @@ install_llama_server() {
         return
     fi
 
+    # Compare local and remote versions to skip unnecessary downloads.
+    # llama-server --version outputs: "version: <build_number> (<hash>)"
+    # Release tags use format: "b<build_number>"
+    if [ -n "$_existing_llama" ]; then
+        _local_build="$("$_existing_llama" --version 2>&1 | sed -n 's/.*version: *\([0-9]*\).*/\1/p' | head -1)"
+        _remote_build="${_llama_tag#b}"
+        if [ -n "$_local_build" ] && [ "$_local_build" = "$_remote_build" ]; then
+            info "llama-server is already up to date (${_llama_tag})."
+            return
+        fi
+        if [ -n "$_local_build" ]; then
+            info "Upgrading llama-server from b${_local_build} to ${_llama_tag}..."
+        else
+            info "Upgrading llama-server to ${_llama_tag}..."
+        fi
+    fi
+
+    info "Downloading llama.cpp for ${OS}/${ARCH}..."
+
     # Build ordered list of candidate asset names (best match first)
     _candidates=""
     case "$OS" in