diff --git a/src/engine/adapters/codex-26.707.css b/src/engine/adapters/codex-26.707.css
index 86276a7..6eafe47 100644
--- a/src/engine/adapters/codex-26.707.css
+++ b/src/engine/adapters/codex-26.707.css
@@ -264,13 +264,21 @@ html.awesome-codex-theme :is(.composer-root, .composer-surface-chrome) {
   backdrop-filter: blur(24px) saturate(120%);
 }
 
-html.awesome-codex-theme :is(button[data-testid="composer-send-button"], .composer-send-button) {
+html.awesome-codex-theme :is(
+  button[data-testid="composer-send-button"],
+  .composer-send-button,
+  button[data-awesome-codex-composer-control="primary"]
+) {
   color: var(--act-background) !important;
   background: var(--act-accent) !important;
   border-color: var(--act-accent-hover) !important;
 }
 
-html.awesome-codex-theme :is(button[data-testid="composer-send-button"], .composer-send-button):not(:disabled):hover {
+html.awesome-codex-theme :is(
+  button[data-testid="composer-send-button"],
+  .composer-send-button,
+  button[data-awesome-codex-composer-control="primary"]
+):not(:disabled):hover {
   background: var(--act-accent-hover) !important;
 }
 
diff --git a/tests/engine/adapter.test.mjs b/tests/engine/adapter.test.mjs
index 352dd1d..92d7a9d 100644
--- a/tests/engine/adapter.test.mjs
+++ b/tests/engine/adapter.test.mjs
@@ -56,6 +56,15 @@ describe('loadCodexAdapter', () => {
     );
   });
 
+  test('styles the semantic primary composer control with contrasting foreground and background', async () => {
+    const { css } = await loadCodexAdapter('26.715.31925');
+
+    expect(css).toContain('button[data-awesome-codex-composer-control="primary"]');
+    expect(css).toMatch(
+      /button\[data-awesome-codex-composer-control="primary"\][^}]*\{[^}]*color:\s*var\(--act-background\)\s*!important;[^}]*background:\s*var\(--act-accent\)\s*!important;/s,
+    );
+  });
+
   test('uses the shared mapping as a best-effort adapter for every numeric version', async () => {
     await expect(loadCodexAdapter('26.716.1')).resolves.toEqual(
       expect.objectContaining({