Repository Instructions

For book-cover fixes in _reading/*.md, use skills/openlibrary-covers/SKILL.md before editing image URLs.
Prefer validated Open Library cover_i URLs in the form https://covers.openlibrary.org/b/id/<cover_id>-M.jpg; avoid trusting existing ISBN URLs because they can point at the wrong edition.
Validate candidate cover URLs with ?default=false and require an actual image response before updating the page.
Preserve each reading-list entry’s existing alt text and class="book-cover-small" unless the title itself is wrong.
Run bundle exec jekyll build after reading-list content edits.
Reading-list page content is rendered from _data/reading/<year>.yml; keep _reading/*-reading-list.md as thin include wrappers.
Manual order in _data/reading/<year>.yml is the reading order. Do not require exact per-book dates.
Use stable book_id values to connect rereads and restarts across years. Set attempt: reread for rereads, attempt: restart for restarting a previous DNF, and outcome: dnf plus stopped_at for unfinished books.