Agents were creating overly narrow skills (e.g. usethis-file-placement) instead of identifying that a more general skill (usethis-file-create) was the right abstraction level. The "when in doubt, create a new skill" default encouraged this.

Updates usethis-skills-create skill (v1.6 → v1.7):

• Reversed default guidance: "When in doubt" now favors adding to an existing general skill rather than creating a new narrow one
• New "Choosing the right scope" section with the hierarchy brainstorming technique — work from ultra-specific to fully general to reveal skill gaps:

  usethis-file-create-placement → usethis-file-create → usethis-file → usethis
  

  Then create at the most general level where guidance remains cohesive, not the most specific.
• Updated procedure: Scope validation via hierarchy brainstorming is now step 1, before creating any files
• Updated quality checklist: Two new checks — hierarchy validation and "not too narrow" verification