The llmstxt.org convention is a one-line summary and short linked sections, so an assistant can read the file in one fetch. Ours opened with a 1,776-character summary sentence and listed every tool with its full description: 539,214 bytes for 1,316 tools, more than many assistants will read.
The change, in platform/pages/build.mjs:
llms.txthas a one-sentence summary, the audience pages, the research topics, and four tools per category with a one-sentence description, then points to each category page for the rest. A build test holds it under 50 KB.llms-full.txtis the previous full text (539 KB), linked from the index.- The list of tools that call a network API moved out of the summary into its own short section.
check.mjsnow checks that every shipped tool appears inllms-full.txt, since the index lists a sample on purpose, and requires both files.
The first attempt, one-sentence descriptions for all tools, was still 375 KB: the size comes from the number of entries, not the length of each.
While building this the site build failed on main because two posts of 2026-10-24 had description lines over the 160-character limit; those are shortened in the same change. The live size and the llms-full.txt status will be re-measured after the next deploy (backlog item P052).