What I learned building an opinionated and minimal coding agent
Lessons I learned while building my own coding agent from scratch.
What I learned building an opinionated and minimal coding agent
mariozechner.atSaved December 13, 2025
Developer Tooling Blog Post
Summary
The author built pi-coding-agent, a deliberately minimal terminal‑based coding assistant, after finding existing tools overly complex. The post explains the three core packages—pi-ai for unified LLM access, pi-agent-core for the agent loop, and pi-tui for a flicker‑free UI—and why many advanced features were left out.
Highlights
- Created to avoid feature bloat in tools like Claude Code.
- pi-ai provides a provider‑agnostic wrapper for Anthropic, OpenAI and other LLM APIs.
- pi-agent-core implements a simple, inspectable agent loop without background execution or sub‑agents.
- pi-tui delivers a smooth terminal UI that updates without flicker.
- Design prioritizes simplicity, transparency, and self‑hosted LLM compatibility.
auto-generated
Context
Audience
Developers and technical users who want a lightweight, terminal‑first coding assistant they can read, modify, and run themselves
DomainAI assisted software development
Formatlong-form article with code snippets
Accessfree online, open source on GitHub
Topics
Related
LangChainAutoGPTCrewAIOpenAI function callingSelf‑hosted LLMs
