Agent Skills: fa-create-skill

Provides Gaia skill-definition maintenance guidance with clear naming, descriptions, ownership boundaries, references, and reuse decisions. Use it by following the skills-specification reference (naming, formatter shape, scope sections, references) when adding or revising a SKILL.md, and by mirroring changes across both ".claude/skills/" and ".github/skills/" trees. Use it when adding, revising, auditing, or rationalizing skills, improving invocation quality, or consolidating drifting procedural guidance.