> ## Documentation Index > Fetch the complete documentation index at: https://docs.chronicle-labs.com/llms.txt > Use this file to discover all available pages before exploring further. # Connect your agent > Connect an agent, run an evaluation, and compare results. Bring your existing agent to Chronicle to test how it performs in a simulated world. ## Register your agent Use a Chronicle integration or the [Agents API](/api-reference/agents) to register your agent. This records its instructions, model, and tools so you can track changes between versions. ## Set up execution Provide your agent's code, dependencies, model credentials, and a command that starts it. Registration alone does not make the agent runnable. During an evaluation, your agent receives a task and credentials for its test world. It completes the task and returns an answer; scorers grade the result. See [execution setup](/api-reference/agents#run-in-an-evaluation) for the details. ## Run your first evaluation Confirm your agent appears in **Agents**, then select it in an evaluation with a task suite. Inspect the scores and recorded actions to see where it succeeded or failed. When you change your agent, register a new version and compare it against the previous one using the same tasks. Choose a task suite, run your agent, and review its results.