diff --git a/electron/mcp/agent-frame-fixtures.ts b/electron/mcp/agent-frame-fixtures.ts
index ad78a1a4..70dcd1ad 100644
--- a/electron/mcp/agent-frame-fixtures.ts
+++ b/electron/mcp/agent-frame-fixtures.ts
@@ -51,6 +51,14 @@ export const READY_AGENT_FRAME_FIXTURES: AgentFrameFixture[] = [
       '> Type your message or @path/to/file',
     ].join('\n'),
   },
+  {
+    name: 'Codex CLI 0.154.0 "Ask Codex to do anything" prompt (custom nono agent wrapper)',
+    frame: [
+      '›  Ask Codex to do anything',
+      '',
+      'gpt-5.6-luna high · /Users/brooksc/git/parallel-code/.worktrees/task-031-nono',
+    ].join('\n'),
+  },
 ];
 
 export const NOT_READY_AGENT_FRAME_FIXTURES: NotReadyAgentFrameFixture[] = [
diff --git a/electron/mcp/coordinator-test-harness.ts b/electron/mcp/coordinator-test-harness.ts
index fccf4f24..7896700b 100644
--- a/electron/mcp/coordinator-test-harness.ts
+++ b/electron/mcp/coordinator-test-harness.ts
@@ -146,7 +146,7 @@ vi.mock('../shared/prompt-detect.js', () => ({
       .slice(-1000)
       .split(/\r\n?|\n/)
       .some((line) =>
-        /(?:^|\s)[❯›]\s*$|^\s*--\s*INSERT\s*--\s*$|^\s*>\s*(?:Type your message|$)/i.test(
+        /(?:^|\s)❯\s*$|^\s*--\s*INSERT\s*--\s*$|^\s*[›>]\s*(?:Type your message|Ask Codex to do anything|$)/i.test(
           line.trim(),
         ),
       );
@@ -171,7 +171,7 @@ vi.mock('../shared/prompt-detect.js', () => ({
     return tail
       .split(/\r\n?|\n/)
       .some((line) =>
-        /(?:^|\s)[❯›]\s*$|^\s*--\s*INSERT\s*--\s*$|^\s*>\s*(?:Type your message|$)/i.test(
+        /(?:^|\s)❯\s*$|^\s*--\s*INSERT\s*--\s*$|^\s*[›>]\s*(?:Type your message|Ask Codex to do anything|$)/i.test(
           line.trim(),
         ),
       );
diff --git a/electron/mcp/prompt-detect.test.ts b/electron/mcp/prompt-detect.test.ts
index 159ee21d..9fd9d454 100644
--- a/electron/mcp/prompt-detect.test.ts
+++ b/electron/mcp/prompt-detect.test.ts
@@ -259,6 +259,21 @@ describe('chunkContainsAgentPrompt', () => {
     ).toBe(true);
   });
 
+  it('returns true for Codex CLI 0.154.0 "Ask Codex to do anything" prompt (› prompt char)', () => {
+    expect(chunkContainsAgentPrompt('›  Ask Codex to do anything')).toBe(true);
+  });
+
+  it('returns true for Codex CLI "Ask Codex to do anything" prompt above footer/status text', () => {
+    const footer = '\n\ngpt-5.6-luna high · ~/repo/worktree';
+    expect(chunkContainsAgentPrompt(`›  Ask Codex to do anything${footer}`)).toBe(true);
+  });
+
+  it('returns true for a plain-> variant of the "Ask Codex to do anything" prompt', () => {
+    // Defensive: some agent builds may render the composer with a plain `>`
+    // instead of Codex's usual `›` — both should be recognized as ready.
+    expect(chunkContainsAgentPrompt('> Ask Codex to do anything')).toBe(true);
+  });
+
   it('does not treat Codex startup screens as ready', () => {
     expect(
       chunkContainsAgentPrompt('Starting MCP servers (0/2): codex_apps, parallel-code\n›'),
diff --git a/electron/shared/prompt-detect.ts b/electron/shared/prompt-detect.ts
index 63f1ecd7..8c8420e4 100644
--- a/electron/shared/prompt-detect.ts
+++ b/electron/shared/prompt-detect.ts
@@ -29,8 +29,7 @@ export const PROMPT_PATTERNS: RegExp[] = [
 export const AGENT_READY_TAIL_PATTERNS: RegExp[] = [
   /^\s*❯\s*$/,
   /^\s*--\s*INSERT\s*--(?:$|\s|[^\w].*$)/i,
-  /^\s*›\s*$/,
-  /^\s*>\s*(?:Type your message|$)/i,
+  /^\s*[›>]\s*(?:Type your message|Ask Codex to do anything|$)/i,
 ];
 
 export const AGENT_READY_TAIL_CHARS = 1000;