Kolo is a text-based Python debugger for AI agents. Capture every executed function call, return value, local variable, HTTP request, and more in greppable trace files.

Kolo

[!TIP] Kolo v3 is here Trace data as plain text files, searchable by humans and agents alike. See what's new.

Trace and visualize your Python code.

📋 docs.kolo.app

Screenshot of Kolo from the Todo Demo app

Quickstart

Getting started with Kolo only takes a couple of minutes. The fastest way to understand what Kolo does and how it can be helpful is by trying it out on a codebase you work on. But if you're in a hurry or can't try Kolo on your own codebase, you can preview some functionality in our playground.

Trace a Django request

Trace a Django request for inspection, visualization, and debugging purposes.

Install kolo using pip install kolo
Add "kolo.middleware.KoloMiddleware" to the top of your MIDDLEWARE list in settings.py
Start your Django server using python manage.py runserver and make a request to any page.
Browse to localhost:8000/_kolo/ to view your traced request. It should look similar to the screenshot at the top of the page 🚀

(For a more in-depth version of this tutorial see How to: Trace Django requests)