diff --git a/tools/ai-cli-dispatch/src/cli.ts b/tools/ai-cli-dispatch/src/cli.ts
index 080692e..b04dae2 100644
--- a/tools/ai-cli-dispatch/src/cli.ts
+++ b/tools/ai-cli-dispatch/src/cli.ts
@@ -71,10 +71,25 @@ function printHelp(): void {
 
 Usage:
   ai-cli-dispatch list [--json|--text]
-  ai-cli-dispatch run --client <client> --prompt <prompt> [--json|--text]
-  ai-cli-dispatch dispatch <prompt> [--client <client>] [--json|--text]
+  ai-cli-dispatch run --client <client> --prompt <prompt> [--sync] [--timeout <ms>] [--debug] [--json|--text]
+  ai-cli-dispatch dispatch <prompt> [--client <client>] [--sync] [--timeout <ms>] [--debug] [--json|--text]
+  ai-cli-dispatch start --client <client> --prompt <prompt> [--timeout <ms>] [--debug] [--json|--text]
+  ai-cli-dispatch status <job-id> [--json|--text]
+  ai-cli-dispatch results <job-id> [--json|--text]
+  ai-cli-dispatch cancel <job-id> [--json|--text]
+  ai-cli-dispatch list-jobs [--status running|completed|failed] [--json|--text]
+  ai-cli-dispatch cleanup-jobs [--max-age <number>[h|m|s|d]] [--json|--text]
   ai-cli-dispatch --help
 
+Flags:
+  --sync          Run synchronously and block until the client returns (default is async)
+  --timeout       Timeout in milliseconds (or override via config)
+  --debug         Emit diagnostic JSON to stderr
+  --max-age       Maximum age for cleanup (default unit: hours)
+  --status        Filter jobs by status (running, completed, failed)
+  --json          Output JSON (default)
+  --text          Output plain text
+
 Clients: codex, claude, opencode`);
 }
 
diff --git a/tools/ai-cli-dispatch/tests/cli.test.ts b/tools/ai-cli-dispatch/tests/cli.test.ts
index 69e2286..107613c 100644
--- a/tools/ai-cli-dispatch/tests/cli.test.ts
+++ b/tools/ai-cli-dispatch/tests/cli.test.ts
@@ -1428,4 +1428,180 @@ describe("main", () => {
       out.restore();
     }
   });
+
+  // S-303: help output and CLI integration smoke tests
+
+  it("--help output documents start subcommand", async () => {
+    const out = captureOutput();
+    try {
+      const code = await main(["node", "cli.ts", "--help"]);
+      assert.strictEqual(code, 0);
+      const help = out.logs.join("\n");
+      assert.ok(help.includes("start"), "help should mention start");
+    } finally {
+      out.restore();
+    }
+  });
+
+  it("--help output documents status subcommand", async () => {
+    const out = captureOutput();
+    try {
+      const code = await main(["node", "cli.ts", "--help"]);
+      assert.strictEqual(code, 0);
+      const help = out.logs.join("\n");
+      assert.ok(help.includes("status"), "help should mention status");
+    } finally {
+      out.restore();
+    }
+  });
+
+  it("--help output documents results subcommand", async () => {
+    const out = captureOutput();
+    try {
+      const code = await main(["node", "cli.ts", "--help"]);
+      assert.strictEqual(code, 0);
+      const help = out.logs.join("\n");
+      assert.ok(help.includes("results"), "help should mention results");
+    } finally {
+      out.restore();
+    }
+  });
+
+  it("--help output documents cancel subcommand", async () => {
+    const out = captureOutput();
+    try {
+      const code = await main(["node", "cli.ts", "--help"]);
+      assert.strictEqual(code, 0);
+      const help = out.logs.join("\n");
+      assert.ok(help.includes("cancel"), "help should mention cancel");
+    } finally {
+      out.restore();
+    }
+  });
+
+  it("--help output documents list-jobs subcommand", async () => {
+    const out = captureOutput();
+    try {
+      const code = await main(["node", "cli.ts", "--help"]);
+      assert.strictEqual(code, 0);
+      const help = out.logs.join("\n");
+      assert.ok(help.includes("list-jobs"), "help should mention list-jobs");
+    } finally {
+      out.restore();
+    }
+  });
+
+  it("--help output documents cleanup-jobs subcommand", async () => {
+    const out = captureOutput();
+    try {
+      const code = await main(["node", "cli.ts", "--help"]);
+      assert.strictEqual(code, 0);
+      const help = out.logs.join("\n");
+      assert.ok(help.includes("cleanup-jobs"), "help should mention cleanup-jobs");
+    } finally {
+      out.restore();
+    }
+  });
+
+  it("--help output documents --sync flag", async () => {
+    const out = captureOutput();
+    try {
+      const code = await main(["node", "cli.ts", "--help"]);
+      assert.strictEqual(code, 0);
+      const help = out.logs.join("\n");
+      assert.ok(help.includes("--sync"), "help should mention --sync");
+    } finally {
+      out.restore();
+    }
+  });
+
+  it("--help output documents --timeout flag", async () => {
+    const out = captureOutput();
+    try {
+      const code = await main(["node", "cli.ts", "--help"]);
+      assert.strictEqual(code, 0);
+      const help = out.logs.join("\n");
+      assert.ok(help.includes("--timeout"), "help should mention --timeout");
+    } finally {
+      out.restore();
+    }
+  });
+
+  it("--help output documents --debug flag", async () => {
+    const out = captureOutput();
+    try {
+      const code = await main(["node", "cli.ts", "--help"]);
+      assert.strictEqual(code, 0);
+      const help = out.logs.join("\n");
+      assert.ok(help.includes("--debug"), "help should mention --debug");
+    } finally {
+      out.restore();
+    }
+  });
+
+  it("--help output documents --max-age flag", async () => {
+    const out = captureOutput();
+    try {
+      const code = await main(["node", "cli.ts", "--help"]);
+      assert.strictEqual(code, 0);
+      const help = out.logs.join("\n");
+      assert.ok(help.includes("--max-age"), "help should mention --max-age");
+    } finally {
+      out.restore();
+    }
+  });
+
+  it("--help output documents --status flag for list-jobs", async () => {
+    const out = captureOutput();
+    try {
+      const code = await main(["node", "cli.ts", "--help"]);
+      assert.strictEqual(code, 0);
+      const help = out.logs.join("\n");
+      assert.ok(help.includes("--status"), "help should mention --status");
+    } finally {
+      out.restore();
+    }
+  });
+
+  it("start returns 1 for unknown client", async () => {
+    const out = captureOutput();
+    try {
+      const code = await main(
+        ["node", "cli.ts", "start", "--client", "bogus", "--prompt", "hello"],
+        {
+          detectClients: () => mockClients,
+        }
+      );
+      assert.strictEqual(code, 1);
+      const parsed = JSON.parse(out.errors[0]);
+      assert.ok(parsed.error.includes("client"));
+    } finally {
+      out.restore();
+    }
+  });
+
+  it("start prints text output with --text", async () => {
+    const out = captureOutput();
+    try {
+      const code = await main(
+        ["node", "cli.ts", "start", "--client", "codex", "--prompt", "hello", "--text"],
+        {
+          detectClients: () => mockClients,
+          startJob: async (client, prompt) => ({
+            id: "job-start-txt",
+            client,
+            prompt,
+            status: "running",
+            startedAt: new Date().toISOString(),
+          }),
+        }
+      );
+      assert.strictEqual(code, 0);
+      assert.ok(out.logs[0].includes("job-start-txt"));
+      assert.ok(out.logs[0].includes("codex"));
+      assert.ok(out.logs[0].includes("running"));
+    } finally {
+      out.restore();
+    }
+  });
 });