Story

Hi HN,

I'm Bryan, an ex-big-tech engineer that's been tinkering with AI for the past two years. I made Pixie, an open-source project that allows you to debug your AI application interactively in the web browser, with just a few lines of setup.

## Why

I started this project because I find debugging my AI applications time-consuming and cumbersome. A lot of my projects are experimental, so it doesn’t make sense for me to build the frontend just to test, or setup automated tests/evals. So what I ended up doing is a lot of inputting awkwardly into the command line, and looking through walls of logs in different places.

## How it works

Start local devserver:

```bash pip install pixie-sdk pixie ```

Add decorator to an async function or generator for the AI app.

```python import pixie

... @pixie.app async def my_app(initial_input): ... # use this if you want interactivity from web ui # specify expected input type with any json or pydantic type user_input = yield pixie.InputRequired(int) ... ```

Then open [Web UI](https://gopixie.ai) to start debugging.

Here's a [demo](https://www.loom.com/share/6d419cfe20884b3994121697377b2a7e)

It currently works out-of-the-box for applications built with Pydantic-ai, langchain, langgraph and openAI SDK/Agents.

Looks interesting? Would love to hear your thoughts!