problem-specifications

build(deps): bump lycheeverse/lychee-action from 2.7.0 to 2.8.0 (#2627)

Add a visual aid for the Prism exercise instructions (#2628)

Lychee link checker: cache results and accept 429s (likely a valid page but rate limited) (#2631)

Killer Sudoku: use Wikipedia for links to details (#2630)

README: do not link to the GitHub admin group; this is not publicly available (#2629)