Custom Harnesses

Tuneloop has first-class integrations for Claude Code, Codex, OpenCode, and Pi. For other harnesses, there are three paths depending on your setup.

Claude Agent SDK

If your team has built agents using the Claude Agent SDK, they produce the same session transcripts as Claude Code. The same plugin-based setup works — see the Claude Code integration page.

OpenTelemetry Collector (Beta)

Already instrumenting your agents with OpenTelemetry? Tuneloop's OTel collector endpoint accepts standard OTLP traces and maps them into Tuneloop's session model. This is currently in beta — please reach out at founders@tuneloop.io if this is your use case.

Tuneloop SDK (Coming Soon)

For custom agent frameworks, we're building a lightweight SDK that you can drop into your harness to capture sessions — similar to how you'd instrument with Braintrust, Langfuse, or Arize today. A few lines of code to wrap your agent's session lifecycle, tool calls, and model interactions.

If you're building a custom harness and want early access, reach out at founders@tuneloop.io.