> For the complete documentation index, see [llms.txt](/llms.txt).
> Markdown versions of each page are available by appending .md to any URL.

# Harnesses in Oz

Run Claude Code or Codex as cloud agents. Both inherit the same triggers, environments, secrets, and observability as Warp Agent.

Oz can run third-party agents — [Claude Code](/agent-platform/cloud-agents/harnesses/claude-code/) and [Codex](/agent-platform/cloud-agents/harnesses/codex/) — as cloud agents alongside Warp Agent. You choose the harness (agent runtime) that fits the task; the platform around the run stays the same.

## What stays the same

Third-party harnesses inherit the same Oz platform features as Warp Agent:

-   **Triggers** — Slack, Linear, schedules, CI, and API [triggers](/agent-platform/cloud-agents/triggers/) launch any harness.
-   **Environments and secrets** — Reuse the same [environments](/agent-platform/cloud-agents/environments/) and [agent secrets](/agent-platform/cloud-agents/secrets/).
-   **Skills and Rules** — Saved [Skills](/agent-platform/capabilities/skills/) and [Rules](/agent-platform/capabilities/rules/) apply across harnesses.
-   **Observability** — Every run produces a transcript and shareable session in the [Oz dashboard](/agent-platform/cloud-agents/managing-cloud-agents/).

## Billing

Claude Code and Codex each call their provider directly using credentials you supply, and the provider bills your account for inference. Warp meters [compute credits](/support-and-community/plans-and-billing/credits/#compute-credits) for the run’s sandbox and [platform credits](/support-and-community/plans-and-billing/platform-credits/) for the orchestration layer.

## How to switch harnesses

### Warp desktop app

In Cloud Mode, choose a harness from the **Agent harness** dropdown above the input.

Note

You can enter Cloud Mode by creating a new **Cloud Agent** tab or by using the `/cloud-agent` slash command.

### Oz web app

On the new run or new schedule pane, choose the harness in the **Harness** field.

### API and SDK

Set the `harness` field on the agent config. See the [API reference](/reference/api-and-sdk/) for the exact field names.

## Related pages

-   [Warp Agent with Oz](/agent-platform/cloud-agents/harnesses/warp-agent/) — Oz’s default first-party harness.
-   [Claude Code with Oz](/agent-platform/cloud-agents/harnesses/claude-code/) — Claude Code as a cloud harness.
-   [Codex with Oz](/agent-platform/cloud-agents/harnesses/codex/) — Codex as a cloud harness.
-   [Authentication](/agent-platform/cloud-agents/harnesses/authentication/) — connect credentials and launch Claude Code or Codex.
-   [Third-party CLI agents in the Warp terminal](/agent-platform/cli-agents/overview/) — run Claude Code, Codex, and other CLI agents locally.