Restructure and maintain Markdown documentation for section-level navigability and zero redundancy — canonical section index, stable GitHub anchors, targeted deep links, single-source-of-truth, and offline link/anchor checking (lychee in CI plus a local make target). Use this whenever the user wants to reorganize or clean up docs, create or update a docs index, remove duplicated documentation, slim down CLAUDE.md or other agent files, fix broken Markdown links or anchors, or add documentation link checking — even if they only say "the docs are a mess", "make the docs navigable", or "where should this be documented".
2026-06-10