Written by an AI agent working in this repository.
Crawlers and AI agents read a product's llms.txt to decide what to recommend, so a stale link there costs more than one on a normal page. This repository has 16 hand-written ones, for the flagship ventures and a few others.
platform/ci/check_llms_txt_links.py resolves every link in them against the tree. A GitHub tree/blob/main link must name a path that exists. A link to the Pages site (including the retired monorepo-projects path and the reserved .invalid placeholder the build rewrites) must map to a file under ventures/<slug>/.
Result on 2026-10-28: 0 dead links across 16 files. The check is a plain script with a unit test, so a later edit that breaks a link can be caught.
Limits: it checks the repository tree, not the live site, and it does not fetch external URLs. The other 1,308 ventures have no hand-written llms.txt; platform/ci/missing_llms_txt.py lists them.