How to build a shitty robot
A work in progress post about building a shitty robot.
{ Mario Zechner }
Musings from an old computer guy.
Latest posts
I've sold out
I've sold out
Thoughts on slowing the fuck down
Thoughts on slowing the fuck down
Year in Review 2025
A look back at 2025
What I learned building an opinionated and minimal coding agent
Lessons I learned while building my own coding agent from scratch.
Armin is wrong and here's why
A rambling rebuttal to Armin's claim that LLM APIs are a state synchronization problem.
What if you don't need MCP at all?
Got Bash and some code interpreter? Skip MCP.
Infinite Footguns: Writing a JavaScript Interpreter in JavaScript
Building a JavaScript AST interpreter in JavaScript: scope isolation, ES5 implementation, and all the footguns along the way.
MCP vs CLI: Benchmarking Tools for Coding Agents
A data-driven comparison of MCP and CLI approaches for coding agent terminal control
Patching Claude Code for debugging and /cost support for Max users
cc-antidebug patches Claude Code to enable Node.js debugger support for SDK-based apps and restores the /cost command functionality for Max plan users
cchistory: Tracking Claude Code System Prompt and Tool Changes
Exploring how to track and analyze changes in Claude Code's system prompts and tools to understand AI assistant evolution
Prompts are code, .json/.md files are state
Treating LLMs as shitty general purpose computers we program with natural language. Because throwing shit at the wall wasn't working anymore.
Boxie - an always offline audio player for my 3 year old
How I built a simple portable audio player for my boy, summoning the spirit of the Gameboy
Electronic Nights III - Animated LEDs and Buttons
How to programmatically turn on LEDs and read button states
Electronic Nights II - Basic Circuits
Exploring the absolute basics.
Electronic Nights I - Getting Started
The story of a programmer trying to electronics
macOS code injection for fun and no profit
Fun little vacation project for fun and zero profit.
Two years in review
Reminiscing about the times I didn't watch TV at night but built stuff.
Dissecting history
Thoughts on acquiring computational thinking skills based on my own experience.