Ladder Logic was always planned as the main language at rungs.dev (hence the name). It wasn't my first choice for the MVP because building such an editor takes a lot of effort, and Monaco is readily available. Structured Text was a reasonable choice to ship quickly.

rungs.dev is a tool we're building to make PLC programming easier, especially for people who write AOIs (Add-On Instructions), teach automation, or just want to test and share logic without hardware or expensive licenses. It's early in development - most features are still missing - but the core idea is simple: isolate logic, test it fast, and document it automatically.