diff --git a/.github/workflows/build-native.yml b/.github/workflows/build-native.yml
index 55ec9e89..fb6760a2 100644
--- a/.github/workflows/build-native.yml
+++ b/.github/workflows/build-native.yml
@@ -20,18 +20,34 @@ jobs:
             target: x86_64-unknown-linux-gnu
             node_arch: x64
             node_os: linux
+            artifact_key: linux-x64
+          - os: ubuntu-latest
+            target: aarch64-unknown-linux-gnu
+            node_arch: arm64
+            node_os: linux
+            artifact_key: linux-arm64
+            cross: true
+          - os: ubuntu-latest
+            target: x86_64-unknown-linux-musl
+            node_arch: x64
+            node_os: linux
+            artifact_key: linux-x64-musl
+            cross: true
           - os: macos-latest
             target: aarch64-apple-darwin
             node_arch: arm64
             node_os: darwin
+            artifact_key: darwin-arm64
           - os: macos-14
             target: x86_64-apple-darwin
             node_arch: x64
             node_os: darwin
+            artifact_key: darwin-x64
           - os: windows-latest
             target: x86_64-pc-windows-msvc
             node_arch: x64
             node_os: win32
+            artifact_key: win32-x64
 
     runs-on: ${{ matrix.os }}
     name: Build ${{ matrix.target }}
@@ -56,6 +72,29 @@ jobs:
         with:
           workspaces: crates/codegraph-core
 
+      - name: Install cross-compilation tools (aarch64-gnu)
+        if: matrix.target == 'aarch64-unknown-linux-gnu'
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y gcc-aarch64-linux-gnu
+          echo "CC=aarch64-linux-gnu-gcc" >> "$GITHUB_ENV"
+          echo "CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_LINKER=aarch64-linux-gnu-gcc" >> "$GITHUB_ENV"
+
+      - name: Install cross-compilation tools (x86_64-musl)
+        if: matrix.target == 'x86_64-unknown-linux-musl'
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y musl-tools
+          # Create linker script so -lgcc_s resolves to static libgcc
+          MUSL_LIB_DIR="$(dirname "$(musl-gcc -print-libgcc-file-name)")"
+          echo 'INPUT(-lgcc)' | sudo tee "${MUSL_LIB_DIR}/libgcc_s.so" > /dev/null
+          echo "CC_x86_64_unknown_linux_musl=musl-gcc" >> "$GITHUB_ENV"
+          echo "CARGO_TARGET_X86_64_UNKNOWN_LINUX_MUSL_LINKER=musl-gcc" >> "$GITHUB_ENV"
+          # Symlink libgcc_s into Rust sysroot so rust-lld can find it for host builds
+          GNU_LIB="$(rustc --print sysroot)/lib/rustlib/x86_64-unknown-linux-gnu/lib"
+          sudo ln -sf /lib/x86_64-linux-gnu/libgcc_s.so.1 "${GNU_LIB}/libgcc_s.so"
+          sudo ln -sf /lib/x86_64-linux-gnu/libgcc_s.so.1 "${GNU_LIB}/libgcc_s.so.1"
+
       - name: Install napi-rs CLI
         run: npm install -g @napi-rs/cli@3
 
@@ -66,6 +105,6 @@ jobs:
       - name: Upload artifact
         uses: actions/upload-artifact@v7
         with:
-          name: native-${{ matrix.node_os }}-${{ matrix.node_arch }}
+          name: native-${{ matrix.artifact_key }}
           path: crates/codegraph-core/*.node
           if-no-files-found: error
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index af9bf174..99c77c9f 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -97,18 +97,34 @@ jobs:
             target: x86_64-unknown-linux-gnu
             node_arch: x64
             node_os: linux
+            artifact_key: linux-x64
+          - os: ubuntu-latest
+            target: aarch64-unknown-linux-gnu
+            node_arch: arm64
+            node_os: linux
+            artifact_key: linux-arm64
+            cross: true
+          - os: ubuntu-latest
+            target: x86_64-unknown-linux-musl
+            node_arch: x64
+            node_os: linux
+            artifact_key: linux-x64-musl
+            cross: true
           - os: macos-latest
             target: aarch64-apple-darwin
             node_arch: arm64
             node_os: darwin
+            artifact_key: darwin-arm64
           - os: macos-14
             target: x86_64-apple-darwin
             node_arch: x64
             node_os: darwin
+            artifact_key: darwin-x64
           - os: windows-latest
             target: x86_64-pc-windows-msvc
             node_arch: x64
             node_os: win32
+            artifact_key: win32-x64
 
     runs-on: ${{ matrix.os }}
     name: Build ${{ matrix.target }}
@@ -133,6 +149,29 @@ jobs:
         with:
           workspaces: crates/codegraph-core
 
+      - name: Install cross-compilation tools (aarch64-gnu)
+        if: matrix.target == 'aarch64-unknown-linux-gnu'
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y gcc-aarch64-linux-gnu
+          echo "CC=aarch64-linux-gnu-gcc" >> "$GITHUB_ENV"
+          echo "CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_LINKER=aarch64-linux-gnu-gcc" >> "$GITHUB_ENV"
+
+      - name: Install cross-compilation tools (x86_64-musl)
+        if: matrix.target == 'x86_64-unknown-linux-musl'
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y musl-tools
+          # Create linker script so -lgcc_s resolves to static libgcc
+          MUSL_LIB_DIR="$(dirname "$(musl-gcc -print-libgcc-file-name)")"
+          echo 'INPUT(-lgcc)' | sudo tee "${MUSL_LIB_DIR}/libgcc_s.so" > /dev/null
+          echo "CC_x86_64_unknown_linux_musl=musl-gcc" >> "$GITHUB_ENV"
+          echo "CARGO_TARGET_X86_64_UNKNOWN_LINUX_MUSL_LINKER=musl-gcc" >> "$GITHUB_ENV"
+          # Symlink libgcc_s into Rust sysroot so rust-lld can find it for host builds
+          GNU_LIB="$(rustc --print sysroot)/lib/rustlib/x86_64-unknown-linux-gnu/lib"
+          sudo ln -sf /lib/x86_64-linux-gnu/libgcc_s.so.1 "${GNU_LIB}/libgcc_s.so"
+          sudo ln -sf /lib/x86_64-linux-gnu/libgcc_s.so.1 "${GNU_LIB}/libgcc_s.so.1"
+
       - name: Install napi-rs CLI
         run: npm install -g @napi-rs/cli@3
 
@@ -143,7 +182,7 @@ jobs:
       - name: Upload native binary
         uses: actions/upload-artifact@v7
         with:
-          name: native-${{ matrix.node_os }}-${{ matrix.node_arch }}
+          name: native-${{ matrix.artifact_key }}
           path: crates/codegraph-core/*.node
           if-no-files-found: error
 
@@ -189,11 +228,14 @@ jobs:
           VERSION: ${{ needs.compute-version.outputs.version }}
         shell: bash
         run: |
+          # Format: pkg_name|os|cpu|libc (libc empty for non-linux)
           declare -A PACKAGES=(
-            ["linux-x64"]="@optave/codegraph-linux-x64-gnu"
-            ["darwin-arm64"]="@optave/codegraph-darwin-arm64"
-            ["darwin-x64"]="@optave/codegraph-darwin-x64"
-            ["win32-x64"]="@optave/codegraph-win32-x64-msvc"
+            ["linux-x64"]="@optave/codegraph-linux-x64-gnu|linux|x64|glibc"
+            ["linux-x64-musl"]="@optave/codegraph-linux-x64-musl|linux|x64|musl"
+            ["linux-arm64"]="@optave/codegraph-linux-arm64-gnu|linux|arm64|glibc"
+            ["darwin-arm64"]="@optave/codegraph-darwin-arm64|darwin|arm64|"
+            ["darwin-x64"]="@optave/codegraph-darwin-x64|darwin|x64|"
+            ["win32-x64"]="@optave/codegraph-win32-x64-msvc|win32|x64|"
           )
 
           ARTIFACTS="${RUNNER_TEMP}/artifacts"
@@ -201,13 +243,23 @@ jobs:
 
           for artifact_dir in "${ARTIFACTS}"/native-*/; do
             platform=$(basename "$artifact_dir" | sed 's/^native-//')
-            pkg_name=${PACKAGES[$platform]}
-            node_os=${platform%%-*}
-            node_arch=${platform##*-}
+            entry=${PACKAGES[$platform]}
+            if [ -z "$entry" ]; then
+              echo "::warning::Unknown platform artifact: $platform — skipping"
+              continue
+            fi
+
+            IFS='|' read -r pkg_name node_os node_arch libc <<< "$entry"
 
             mkdir -p "${PKG_DIR}/$platform"
             cp "$artifact_dir"/*.node "${PKG_DIR}/$platform/codegraph-core.node"
 
+            # Build libc field for Linux packages
+            libc_field=""
+            if [ -n "$libc" ]; then
+              libc_field="\"libc\": [\"${libc}\"],"
+            fi
+
             cat > "${PKG_DIR}/$platform/package.json" <<PKGJSON
           {
             "name": "${pkg_name}",
@@ -215,6 +267,7 @@ jobs:
             "description": "Native codegraph-core binary for ${node_os}-${node_arch}",
             "os": ["${node_os}"],
             "cpu": ["${node_arch}"],
+            ${libc_field}
             "main": "codegraph-core.node",
             "files": ["codegraph-core.node"],
             "license": "Apache-2.0",
@@ -288,8 +341,12 @@ jobs:
           npm install ${{ github.server_url }}/${{ github.repository }}/releases/download/${TAG}/optave-codegraph-${VERSION}.tgz
 
           # For native performance, also install your platform package:
-          # Linux x64:
+          # Linux x64 (glibc):
           npm install ${{ github.server_url }}/${{ github.repository }}/releases/download/${TAG}/optave-codegraph-linux-x64-gnu-${VERSION}.tgz
+          # Linux x64 (musl/Alpine):
+          npm install ${{ github.server_url }}/${{ github.repository }}/releases/download/${TAG}/optave-codegraph-linux-x64-musl-${VERSION}.tgz
+          # Linux arm64 (glibc):
+          npm install ${{ github.server_url }}/${{ github.repository }}/releases/download/${TAG}/optave-codegraph-linux-arm64-gnu-${VERSION}.tgz
           # macOS arm64:
           npm install ${{ github.server_url }}/${{ github.repository }}/releases/download/${TAG}/optave-codegraph-darwin-arm64-${VERSION}.tgz
           \`\`\`
@@ -363,11 +420,14 @@ jobs:
           NPM_TAG: ${{ needs.compute-version.outputs.npm_tag }}
         shell: bash
         run: |
+          # Format: pkg_name|os|cpu|libc (libc empty for non-linux)
           declare -A PACKAGES=(
-            ["linux-x64"]="@optave/codegraph-linux-x64-gnu"
-            ["darwin-arm64"]="@optave/codegraph-darwin-arm64"
-            ["darwin-x64"]="@optave/codegraph-darwin-x64"
-            ["win32-x64"]="@optave/codegraph-win32-x64-msvc"
+            ["linux-x64"]="@optave/codegraph-linux-x64-gnu|linux|x64|glibc"
+            ["linux-x64-musl"]="@optave/codegraph-linux-x64-musl|linux|x64|musl"
+            ["linux-arm64"]="@optave/codegraph-linux-arm64-gnu|linux|arm64|glibc"
+            ["darwin-arm64"]="@optave/codegraph-darwin-arm64|darwin|arm64|"
+            ["darwin-x64"]="@optave/codegraph-darwin-x64|darwin|x64|"
+            ["win32-x64"]="@optave/codegraph-win32-x64-msvc|win32|x64|"
           )
 
           ARTIFACTS="${RUNNER_TEMP}/artifacts"
@@ -375,13 +435,23 @@ jobs:
 
           for artifact_dir in "${ARTIFACTS}"/native-*/; do
             platform=$(basename "$artifact_dir" | sed 's/^native-//')
-            pkg_name=${PACKAGES[$platform]}
-            node_os=${platform%%-*}
-            node_arch=${platform##*-}
+            entry=${PACKAGES[$platform]}
+            if [ -z "$entry" ]; then
+              echo "::warning::Unknown platform artifact: $platform — skipping"
+              continue
+            fi
+
+            IFS='|' read -r pkg_name node_os node_arch libc <<< "$entry"
 
             mkdir -p "${PKG_DIR}/$platform"
             cp "$artifact_dir"/*.node "${PKG_DIR}/$platform/codegraph-core.node"
 
+            # Build libc field for Linux packages
+            libc_field=""
+            if [ -n "$libc" ]; then
+              libc_field="\"libc\": [\"${libc}\"],"
+            fi
+
             cat > "${PKG_DIR}/$platform/package.json" <<PKGJSON
           {
             "name": "${pkg_name}",
@@ -389,6 +459,7 @@ jobs:
             "description": "Native codegraph-core binary for ${node_os}-${node_arch}",
             "os": ["${node_os}"],
             "cpu": ["${node_arch}"],
+            ${libc_field}
             "main": "codegraph-core.node",
             "files": ["codegraph-core.node"],
             "license": "Apache-2.0",
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4573de31..82e484b1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,7 @@ All notable changes to this project will be documented in this file. See [commit
 
 * **ast:** use single transaction for AST node insertion — astMs drops from ~3600ms to ~350ms (native) and ~547ms (WASM), reducing overall native build from 24.9 to 8.5 ms/file ([#333](https://github.com/optave/codegraph/pull/333))
 
+
 ## [3.0.2](https://github.com/optave/codegraph/compare/v3.0.1...v3.0.2) (2026-03-04)
 
 **Dataflow goes multi-language, build performance recovery, and native engine parity fixes.** This patch extends dataflow analysis from JS/TS-only to all 11 supported languages, recovers build performance lost after CFG/dataflow became default-on, fixes language-aware identifier collection in dataflow, and closes a native engine scoping bug for constants.
diff --git a/crates/codegraph-core/package.json b/crates/codegraph-core/package.json
index 1b6b3978..9ae7b833 100644
--- a/crates/codegraph-core/package.json
+++ b/crates/codegraph-core/package.json
@@ -6,6 +6,8 @@
     "binaryName": "codegraph-core",
     "targets": [
       "x86_64-unknown-linux-gnu",
+      "aarch64-unknown-linux-gnu",
+      "x86_64-unknown-linux-musl",
       "aarch64-apple-darwin",
       "x86_64-apple-darwin",
       "x86_64-pc-windows-msvc"
diff --git a/package.json b/package.json
index 0955e7e4..e30a4843 100644
--- a/package.json
+++ b/package.json
@@ -73,7 +73,10 @@
     "@modelcontextprotocol/sdk": "^1.0.0",
     "@optave/codegraph-darwin-arm64": "3.0.3",
     "@optave/codegraph-darwin-x64": "3.0.3",
+    "@optave/codegraph-linux-arm64-gnu": "3.0.3",
+    "@optave/codegraph-linux-arm64-musl": "3.0.3",
     "@optave/codegraph-linux-x64-gnu": "3.0.3",
+    "@optave/codegraph-linux-x64-musl": "3.0.3",
     "@optave/codegraph-win32-x64-msvc": "3.0.3"
   },
   "devDependencies": {
diff --git a/src/native.js b/src/native.js
index c2a9090d..785ba1be 100644
--- a/src/native.js
+++ b/src/native.js
@@ -12,9 +12,27 @@ import os from 'node:os';
 let _cached; // undefined = not yet tried, null = failed, object = module
 let _loadError = null;
 
-/** Map of (platform-arch) → npm package name. */
+/**
+ * Detect whether the current Linux environment uses glibc or musl.
+ * Returns 'gnu' for glibc, 'musl' for musl, 'gnu' as fallback.
+ */
+function detectLibc() {
+  try {
+    const { readdirSync } = require('node:fs');
+    const files = readdirSync('/lib');
+    if (files.some((f) => f.startsWith('ld-musl-') && f.endsWith('.so.1'))) {
+      return 'musl';
+    }
+  } catch {}
+  return 'gnu';
+}
+
+/** Map of (platform-arch[-libc]) → npm package name. */
 const PLATFORM_PACKAGES = {
-  'linux-x64': '@optave/codegraph-linux-x64-gnu',
+  'linux-x64-gnu': '@optave/codegraph-linux-x64-gnu',
+  'linux-x64-musl': '@optave/codegraph-linux-x64-musl',
+  'linux-arm64-gnu': '@optave/codegraph-linux-arm64-gnu',
+  'linux-arm64-musl': '@optave/codegraph-linux-arm64-musl', // not yet published — placeholder for future CI target
   'darwin-arm64': '@optave/codegraph-darwin-arm64',
   'darwin-x64': '@optave/codegraph-darwin-x64',
   'win32-x64': '@optave/codegraph-win32-x64-msvc',
@@ -29,7 +47,9 @@ export function loadNative() {
 
   const require = createRequire(import.meta.url);
 
-  const key = `${os.platform()}-${os.arch()}`;
+  const platform = os.platform();
+  const arch = os.arch();
+  const key = platform === 'linux' ? `${platform}-${arch}-${detectLibc()}` : `${platform}-${arch}`;
   const pkg = PLATFORM_PACKAGES[key];
   if (pkg) {
     try {