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agent-trace: The Black Box for AI Agent Debugging — Record and Replay Every Tool Call in Full

agent-trace is an observation tool designed specifically for AI agents. It can capture every tool call, prompt, and response from MCP clients like Claude Code and Cursor, helping developers debug complex workflows.

AI 智能体调试工具可观测性MCPClaude CodeCursor追踪日志DatadogHoneycomb
Published 2026-04-09 16:11Recent activity 2026-04-09 16:15Estimated read 3 min
agent-trace: The Black Box for AI Agent Debugging — Record and Replay Every Tool Call in Full
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Section 01

Introduction / Main Floor: agent-trace: The Black Box for AI Agent Debugging — Record and Replay Every Tool Call in Full

agent-trace is an observation tool designed specifically for AI agents. It can capture every tool call, prompt, and response from MCP clients like Claude Code and Cursor, helping developers debug complex workflows.

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Section 02

Core Features: Full-Link Capture

The design goal of agent-trace is to provide full observability of AI agent behaviors. It can:

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Section 03

1. Capture Every Tool Call

Modern AI agents complete complex tasks by calling external tools (such as file reading/writing, code execution, API requests). agent-trace records the parameters, execution time, and return results of each tool call, forming a complete call chain.

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Section 04

2. Save Complete Prompts and Responses

It not only records the requests sent by the agent but also includes the user's original prompt and the model's complete response. This is crucial for understanding the agent's decision-making logic.

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Section 05

3. Session Replay Capability

The captured trace data can be fully replayed. Developers can reproduce the agent's entire execution process like watching a video, precisely locating the moment when a problem occurs.

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Section 06

4. Multi-Client Compatibility

agent-trace works based on the MCP (Multi-Client Protocol) and supports:

  • Claude Code
  • Cursor
  • Other MCP-compatible AI clients
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Section 07

Debug Complex Workflows

When an agent performs multi-step tasks (e.g., "analyze codebase, identify performance bottlenecks, generate optimization plans"), errors in any intermediate step may cause the final result to deviate from expectations. agent-trace allows developers to check each decision point step by step.

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Section 08

Audit and Compliance

In an enterprise environment, understanding which data the AI system accessed and which operations it performed is a basic requirement for compliance audits. agent-trace provides non-repudiable operation logs.