Show HN: MicroCodex Coding Agent – OpenAI/codex reimplemented in C++ <1MB binary

Post by paoloanzn » Mon, Aug 03, 2026, 2:15 PM UTC

selcuka wrote: post #18

paoloanzn wrote: post #15

Earlier quoted context omitted.

I ported almost every key feature already tbh. Of course there will always be a compromise, but there is even still margin to add more. Tools, skills, context compaction, it’s all already implemented.

I haven't actually tried it, my comment was based on the "Known bugs and issues" section in the readme (e.g. no MCP support yet). Apologies if that section is out of date. If the functionality is on par with the mainstream ones, then sure, small and lightweight is preferable.

Post by fractorial » Mon, Aug 03, 2026, 4:12 PM UTC

embedding-shape wrote: post #10

fractorial wrote: post #2

I’m not quite sure why the harness itself needs to be small. Isn’t the system prompt and management of system prompt the bit you want lightweight?

Probably you want all of them to be as simple and small as possible, especially if you want to use it to work on itself. Smaller codebases are (generally) easier to work with.