Deprecating My Symfony Profiler MCP Bundle: Right About the Problem, Half-Wrong About the Solution
In March 2025 I built mcp-profiler-bundle , a Symfony bundle that let AI coding agents read the Symfony Profiler: the requests your app just served, the queries they ran, the exceptions they threw. The bet was simple. An agent that can see what the app actually did should debug it better than one that can only read the source. This week I deprecated it. Symfony now ships the official version of…
My Symfony Profiler MCP Bundle was a tool that allowed AI coding agents to read the Symfony Profiler, including requests, queries, and exceptions generated by the app. I developed the bundle in March 2025, with the aim of enabling agents to debug applications more effectively than those that could only read the source code. However, I recently deprecated the bundle as Symfony now offers an official version of the same idea, and upon reviewing my code, I realized that while I was correct about the problem, I was only partly right about the solution.
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