Cameron shared the skill's Tangled URL and asked for it to be linked from the spec so contributors can find the submission path quickly. plots.md now links wiki/process/repository-skills.md#checked-in-skills -- the skill registry that landed earlier today -- from Depends on, the authoring bullet, and a pointer at the top of the contributor-contract section, rather than pointing at the raw file path directly, so the registry stays the one owner of which skills exist and why. Defense: amends wiki/mechanics/plots.md per meta.md's citation norm (named concepts link their owner at first mention); no behavior change.