Codex Builds an FPGA Spectrum Analyzer
newhouseb · x · 2026-07-13
After handing an old hobby project over to Codex, the AI managed to build a 2.5GHz "spectrum analyzer" based on the SERDES block of an old PicoEVB FPGA in about 12 hours. It even handled PCIe-related details, making the author feel that a task originally projected to take months had been massively accelerated. However, Codex later hit a reproducibility snag: because it had performed compaction, it realized it was building upon partial cached artifacts and couldn't reproduce the final bitstream. It then spent another 12 hours "tinkering" to fix the issue. The author concludes by stating they now mandate using git for version control.
Related event: Codex Builds 2.5GHz Spectrum Analyzer in 12 Hours(2 posts)→
More from coding & agent
- X post asks whether Cursor Composer, built on Kimi models, would also be banned — max_paperclips · 2026-07-21
- A developer’s Codex usage is draining pooled enterprise credits at a small company — Distinct_Relation_62 · 2026-07-21
- Qwen Code ships cua-driver-rs 0.7.3 with relative coordinates and MCP filtering — github-actions[bot] · 2026-07-21
- Matt Pocock says every new codebase turns legacy within days — mattpocockuk · 2026-07-21
- Meta and Unity link AI workflows to Quest development across setup, input and validation — Vjeux · 2026-07-21
- AI Engineer World’s Fair spotlights Kids Day with 87 children learning to code — steveonjava · 2026-07-21