agent observability, AI agent harness, AI Agents, Arize AX, claude-code, Codex, coding-agents, cursor, Evals, gemini-cli, github-copilot, harness tracing, harness-engineering, LLM observability, MCP, Open Source, OpenTelemetry, phoenix

Coding agent tracing and evaluation: An open source tool to improve AI coding workflows

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Announcing coding harness tracing for observing, evaluating, and improving coding agent workflows across Claude Code, Cursor, Codex, GitHub Copilot, and Gemini CLI.

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