diff --git a/home-modules/dev.nix b/home-modules/dev.nix
index d8ee71a..3fa2672 100644
--- a/home-modules/dev.nix
+++ b/home-modules/dev.nix
@@ -47,12 +47,33 @@
       nodejs_24
       codex
       claude-code
-      opencode
+      (
+        # Wrapping opencode to set the OPENCODE_ENABLE_EXA environment variable
+        runCommand "opencode" {
+          buildInputs = [ makeWrapper ];
+        } ''
+          mkdir -p $out/bin
+          makeWrapper ${pkgs.opencode}/bin/opencode $out/bin/opencode \
+            --set OPENCODE_ENABLE_EXA "1"
+          ''
+      )
       winbox4
       amdgpu_top
       dua
     ];
 
+    # Inject the opencode-claude-auth plugin into the user's opencode.json without
+    # overwriting it — replaces any stale store path for this plugin and adds if absent.
+    home.activation.opencodeClaudeAuth = lib.hm.dag.entryAfter [ "writeBoundary" ] ''
+      cfg="$HOME/.config/opencode/opencode.json"
+      mkdir -p "$(dirname "$cfg")"
+      [ -f "$cfg" ] || echo '{}' > "$cfg"
+      tmp=$(mktemp)
+      ${pkgs.jq}/bin/jq --arg path "file://${pkgs.opencode-claude-auth}" '
+        .plugin = ((.plugin // []) | map(select(test("opencode-claude-auth") | not)) + [$path])
+      ' "$cfg" > "$tmp" && mv "$tmp" "$cfg"
+    '';
+
     # SSH config
     programs.ssh = {
       enable = true;
@@ -95,4 +116,4 @@
       ''
     );
   };
-}
\ No newline at end of file
+}
diff --git a/overlays/pkgs.nix b/overlays/pkgs.nix
index 4104b41..304a645 100644
--- a/overlays/pkgs.nix
+++ b/overlays/pkgs.nix
@@ -1,6 +1,7 @@
 self: super:
 {
   ddccontrol = super.callPackage ../pkgs/ddccontrol {};
+  opencode-claude-auth = super.callPackage ../pkgs/opencode-claude-auth {};
   # Pin some kde packages to 6.3.1, 6.3.2 breaks thunderbolt
   # kdePackages = super.kdePackages.overrideScope(kdeFinal: kdePrev: {
   #   kwin = kdePrev.kwin.overrideAttrs (prevAttrs: {
diff --git a/pkgs/opencode-claude-auth/default.nix b/pkgs/opencode-claude-auth/default.nix
new file mode 100644
index 0000000..b335b13
--- /dev/null
+++ b/pkgs/opencode-claude-auth/default.nix
@@ -0,0 +1,18 @@
+{ stdenv, fetchurl }:
+
+stdenv.mkDerivation {
+  pname = "opencode-claude-auth";
+  version = "1.5.0";
+
+  src = fetchurl {
+    url = "https://registry.npmjs.org/opencode-claude-auth/-/opencode-claude-auth-1.5.0.tgz";
+    hash = "sha512-5NSL+x++VTe2ZrFSznXKv7imiKObIBz0QXPuL+g1NAXAcdTGcbEbQBvvHZeIaSBNjmwpY2MR67Yez1f3LlPl7w==";
+  };
+
+  dontBuild = true;
+
+  installPhase = ''
+    mkdir -p $out
+    cp -r ./ $out/
+  '';
+}