What it is — ASD-STE100 (Simplified Technical English) is a controlled-language standard, originally built for aircraft maintenance manuals, that constrains vocabulary and grammar so technical writing is unambiguous — and it works as a style constraint for LLM-written docs too.

Key points

• Defines ~900 approved words and 53 writing rules, maintained by ASD's Simplified Technical English Maintenance Group; free to download.
• The idea circulating in the community: require an LLM to adhere to STE's rules as a prompt constraint to cut "AI-slop"-sounding technical documentation.

Resolved via search — verify before relying on it.