Your first ACP client — connect to the Grok agent and send a prompt.
Full tutorial: https://lab.pollack.ai/docs/acp-java-sdk/tutorial/01-first-contact
Requires the Grok CLI on your PATH, signed in once with grok login.
The module launches it as grok agent stdio; no API key is needed.
./mvnw exec:java -pl module-01-first-contact