Writing a tiny shell in C — Part 1: the loop that runs your programs
Build tinysh from scratch: a Read-Eval-Print loop in C that reads input, tokenizes commands, and runs programs with fork, execvp, and wait.
Michael Karotsieris
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Latest posts
What Do We Mean When We Say Evals?
A practical framing of AI evals — what to evaluate across model, agent, and application layers, when to run them, and how to turn vibe coding into engineering.
Here is how I built a simple coding agent
Walking through spek, a small LLM-powered coding agent that turns a markdown spec into a working, tested Python package — and the six design questions I had to answer to build it.
Poking Around ChatGPT's Sandbox
An exploration of what ChatGPT's code execution environment can and can't do — filesystem access, process introspection, networking, and the curious 'prove it' prompting pattern.