mwolson · Sep 30, 2026 · Oct 10, 2026 · Oct 14, 2026 · Oct 17, 2026 · Oct 19, 2026
diff --git a/packaging/aur/t3code-bin/PKGBUILD b/packaging/aur/t3code-bin/PKGBUILD
@@ -94,7 +94,7 @@ TryExec=t3code
 Terminal=false
 Type=Application
 Icon=t3code
-StartupWMClass=t3code
+StartupWMClass=com.t3tools.T3Code
 Categories=Development;
 MimeType=x-scheme-handler/t3code;
 EOF

diff --git a/packaging/aur/t3code-nightly-bin/PKGBUILD b/packaging/aur/t3code-nightly-bin/PKGBUILD
@@ -95,7 +95,7 @@ TryExec=t3code-nightly
 Terminal=false
 Type=Application
 Icon=t3code-nightly
-StartupWMClass=t3code
+StartupWMClass=com.t3tools.T3Code
 Categories=Development;
 MimeType=x-scheme-handler/t3code;
 EOF

diff --git a/scripts/build-desktop-artifact.test.ts b/scripts/build-desktop-artifact.test.ts
@@ -684,6 +684,9 @@ it.layer(NodeServices.layer)("build-desktop-artifact", (it) => {
       assert.deepStrictEqual((linux.linux as Record<string, unknown>).protocols, [
         { name: "T3 Code", schemes: ["t3code", "t3code-dev"] },
       ]);
+      assert.deepStrictEqual((linux.linux as Record<string, unknown>).desktop, {
+        entry: { StartupWMClass: "com.t3tools.T3Code" },
+      });
       assert.deepStrictEqual(mac.files, [...DESKTOP_FILE_EXCLUSIONS, ...MAC_FILE_EXCLUSIONS]);
       assert.deepStrictEqual(linux.files, [...DESKTOP_FILE_EXCLUSIONS, ...LINUX_FILE_EXCLUSIONS]);
       assert.deepStrictEqual(win.files, DESKTOP_FILE_EXCLUSIONS);

diff --git a/scripts/build-desktop-artifact.ts b/scripts/build-desktop-artifact.ts
@@ -2756,7 +2756,9 @@ export const createBuildConfig = Effect.fn("createBuildConfig")(function* (
       ],
       desktop: {
         entry: {
-          StartupWMClass: "t3code",
+          // Matches the app id from setDesktopName, so docks group the running
+          // window under this launcher rather than the hidden URL handler.
+          StartupWMClass: "com.t3tools.T3Code",
         },
       },
     };