Pick your stack Claude CodeOne command. Zero code changes.CodexOne command. Zero code changes.AnthropicOne line. Patches the SDK.OpenAIOne line. Patches the SDK.Python SDKCustom agents. Decorators or manual spans. What you get GuardBlock, modify, or escalate every tool call before it runs.Self-HealDiagnose failures from traces and source. Open fix PRs.DatasetsCurate eval datasets from real traces. Score with any Python function.Claude CodeTrace every Claude Code session, tool use, and stop event with one command.