Agent Skills: fa-create-agent

Provides custom-agent definition guidance with clear role boundaries, strong descriptions, valid tool scopes, delegation rules, and overlap control. Use it by following the agents-specification reference (formatter, role contract, tool allow-list, delegation rules) when adding or revising an agent file, and by mirroring changes across both ".claude/agents/" and ".github/agents/" trees. Use it when adding, revising, auditing, or rationalizing agent files, role ownership, naming, or contract alignment.