Agent Profiler: A Local Open-Source Trace Viewer for Coding Agents

Agent Profiler is an innovative, open-source tool aimed at simplifying the debugging of local coding agents. Created for developers who face challenges in assessing poor performance in Claude Code subagents, it serves a critical need in agentic development. Unlike traditional software performance tools, Agent Profiler is designed specifically for the unique demands of coding agent sessions, which often contain an overwhelming amount of local tool interactions rather than just LLM API calls.

This tool requires zero setup — simply use Node.js to run it and enjoy a local UI that doesn’t require any kind of external account or data sharing. It analyzes local transcripts from your coding sessions, providing insights into where context bloat might be affecting performance. Because the tool operates entirely on the user’s machine, all data remains private, ensuring a local-first development approach.

Common commands are included for ease of use, allowing developers to easily manage their debugging processes. As developers increasingly rely on agentic systems like Claude Code, tools like Agent Profiler are essential for maintaining performance and efficiency in software development practices.