97 skills · one session a day
SKILL ISSUE
Learn Claude Skills, One Session a Day
Read the situation, pick the skill, keep your streak. Lose? Skill issue.
The premise
What Skill Issue is
A daily drill for one narrow thing: knowing which Claude skill a situation calls for. Every question is a real scenario and a set of plausible skills, one of which is right. It takes a few minutes, and it tells you why the answer was the answer.
Who it is for
Anyone already working with Claude or Claude Code who has hit the failure where the wrong skill fires, or none does. That usually is not a bug: two skills described similar work and the agent picked the other one. Knowing a skill exists is not the same as reaching for it under time pressure, and the second thing is the one that shows up in your day.
97
public Claude skills in the bank, each with a scenario written for this game rather than copied from its author.
20
families, grouped by what they get mistaken for. The densest ones are the ones worth drilling.
Why the wrong skill fires
Claude chooses a skill by reading its description, so two skills that describe similar work end up competing for the same request. When five different authors all ship something called a security review, the one that loads is not reliably the one you meant. That is the failure this game drills: not what a skill does, but which of the near-identical options is the right call for the situation in front of you.
The sharpest version is two skills with the same name. 62 side-by-side comparisons take the pairs that get mixed up most and say what each one is actually for.
Which skills it covers
The bank draws on 97 public skills, grouped into 20 families by what they get mistaken for: security review, document handling, design, testing, SEO, release workflow and the rest. The densest families are the ones worth drilling, because density is another way of saying these are the skills you are most likely to confuse. You can browse all 97 Claude skills and read what each one is for, or let a session choose the ones you keep getting wrong.
What it costs
Nothing, and it needs no account. Progress lives on your own device, so a session works offline and nothing about your practice leaves the browser.