diff --git a/tools/ai-cli-dispatch/src/cli.ts b/tools/ai-cli-dispatch/src/cli.ts
new file mode 100644
index 0000000..b9fbbc9
--- /dev/null
+++ b/tools/ai-cli-dispatch/src/cli.ts
@@ -0,0 +1,152 @@
+import minimist from "minimist";
+import { spawnSync } from "node:child_process";
+import {
+  type ClientName,
+  type ClientInfo,
+  type ExecResult,
+  ClientNotFoundError,
+} from "./types.js";
+
+const CLIENT_NAMES: ClientName[] = ["codex", "claude", "opencode"];
+const VERSION_FLAGS: Record<ClientName, string> = {
+  codex: "--version",
+  claude: "--version",
+  opencode: "--version",
+};
+
+function whichSync(cmd: string): string | undefined {
+  const isWin = process.platform === "win32";
+  const result = spawnSync(isWin ? "where" : "which", [cmd], {
+    encoding: "utf-8",
+  });
+  if (result.status === 0) {
+    return result.stdout.trim().split("\n")[0];
+  }
+  return undefined;
+}
+
+export function discoverClients(): ClientInfo[] {
+  return CLIENT_NAMES.map((name) => {
+    const path = whichSync(name);
+    if (!path) {
+      return { name, found: false };
+    }
+    const versionResult = spawnSync(name, [VERSION_FLAGS[name]], {
+      encoding: "utf-8",
+    });
+    const version =
+      versionResult.status === 0 ? versionResult.stdout.trim() : undefined;
+    return { name, path, version, found: true };
+  });
+}
+
+export function execClient(
+  client: ClientName,
+  prompt: string,
+  clientPath?: string
+): ExecResult {
+  const path =
+    clientPath ?? discoverClients().find((c) => c.name === client)?.path;
+  if (!path) {
+    throw new ClientNotFoundError(client);
+  }
+  const result = spawnSync(client, [prompt], {
+    encoding: "utf-8",
+    stdio: ["inherit", "pipe", "pipe"],
+  });
+  return {
+    stdout: result.stdout ?? "",
+    stderr: result.stderr ?? "",
+    exitCode: typeof result.status === "number" ? result.status : 1,
+  };
+}
+
+function printHelp(): void {
+  console.log(`AI CLI Dispatch
+
+Usage:
+  ai-cli-dispatch list [--json]
+  ai-cli-dispatch exec --client <client> --prompt <prompt>
+  ai-cli-dispatch --help
+
+Clients: codex, claude, opencode`);
+}
+
+export async function main(argv: string[]): Promise<number> {
+  const rawArgs = argv.slice(2);
+  // When run via tsx, argv[2] is the script path (e.g. src/cli.ts); skip it.
+  const parseArgs =
+    rawArgs[0]?.includes("cli.ts") ? rawArgs.slice(1) : rawArgs;
+
+  const args = minimist(parseArgs, {
+    string: ["client", "prompt"],
+    boolean: ["json", "help", "debug"],
+    alias: { h: "help" },
+  });
+
+  if (args.help) {
+    printHelp();
+    return 0;
+  }
+
+  const command = args._[0];
+
+  if (command === "list") {
+    const clients = discoverClients();
+    if (args.json) {
+      console.log(JSON.stringify(clients, null, 2));
+    } else {
+      for (const c of clients) {
+        const status = c.found
+          ? `✓ ${c.version ?? "unknown version"}`
+          : "✗ not found";
+        console.log(`${c.name}: ${status}`);
+      }
+    }
+    return 0;
+  }
+
+  if (command === "exec") {
+    const client = args.client as ClientName | undefined;
+    const prompt = args.prompt as string | undefined;
+    if (!client || !CLIENT_NAMES.includes(client)) {
+      console.error(
+        `Error: --client must be one of ${CLIENT_NAMES.join(", ")}`
+      );
+      return 1;
+    }
+    if (!prompt) {
+      console.error("Error: --prompt is required");
+      return 1;
+    }
+    try {
+      const result = execClient(client, prompt);
+      if (result.stdout) process.stdout.write(result.stdout);
+      if (result.stderr) process.stderr.write(result.stderr);
+      return result.exitCode;
+    } catch (err) {
+      if (err instanceof ClientNotFoundError) {
+        console.error(err.message);
+        return 1;
+      }
+      throw err;
+    }
+  }
+
+  if (command) {
+    console.error(`Unknown command: ${command}`);
+  } else {
+    console.error("Error: no command given");
+  }
+  printHelp();
+  return 1;
+}
+
+const isMain =
+  import.meta.url.startsWith("file://") &&
+  !!process.argv[1] &&
+  import.meta.url.endsWith(process.argv[1].replace(/\\/g, "/"));
+
+if (isMain) {
+  main(process.argv).then((code) => process.exit(code));
+}
diff --git a/tools/ai-cli-dispatch/tests/cli.test.ts b/tools/ai-cli-dispatch/tests/cli.test.ts
new file mode 100644
index 0000000..39fa9c5
--- /dev/null
+++ b/tools/ai-cli-dispatch/tests/cli.test.ts
@@ -0,0 +1,66 @@
+import { describe, it } from "node:test";
+import assert from "node:assert";
+import { main, discoverClients, execClient } from "../src/cli.js";
+import { ClientNotFoundError } from "../src/types.js";
+
+describe("discoverClients", () => {
+  it("returns all three configured clients", () => {
+    const clients = discoverClients();
+    assert.strictEqual(clients.length, 3);
+    const names = clients.map((c) => c.name);
+    assert.deepStrictEqual(names, ["codex", "claude", "opencode"]);
+  });
+
+  it("returns ClientInfo with found boolean", () => {
+    const clients = discoverClients();
+    for (const c of clients) {
+      assert.strictEqual(typeof c.found, "boolean");
+    }
+  });
+});
+
+describe("main", () => {
+  it("returns 0 for --help", async () => {
+    const code = await main(["node", "cli.ts", "--help"]);
+    assert.strictEqual(code, 0);
+  });
+
+  it("returns 0 for list", async () => {
+    const code = await main(["node", "cli.ts", "list"]);
+    assert.strictEqual(code, 0);
+  });
+
+  it("returns 0 for list --json", async () => {
+    const code = await main(["node", "cli.ts", "list", "--json"]);
+    assert.strictEqual(code, 0);
+  });
+
+  it("returns 1 for exec without --client", async () => {
+    const code = await main(["node", "cli.ts", "exec", "--prompt", "hello"]);
+    assert.strictEqual(code, 1);
+  });
+
+  it("returns 1 for exec without --prompt", async () => {
+    const code = await main(["node", "cli.ts", "exec", "--client", "codex"]);
+    assert.strictEqual(code, 1);
+  });
+
+  it("returns 1 for unknown command", async () => {
+    const code = await main(["node", "cli.ts", "bogus"]);
+    assert.strictEqual(code, 1);
+  });
+
+  it("returns 1 when no command is given", async () => {
+    const code = await main(["node", "cli.ts"]);
+    assert.strictEqual(code, 1);
+  });
+});
+
+describe("execClient", () => {
+  it("throws ClientNotFoundError when client path is empty", () => {
+    assert.throws(
+      () => execClient("codex", "test prompt", ""),
+      (err: unknown) => err instanceof ClientNotFoundError
+    );
+  });
+});