defense-in-depth
Use when invalid data causes failures deep in execution, requiring validation at multiple system layers - validates at every layer data passes through to make bugs structurally impossible
Also installable via skills CLI
npx skills add AlabamaMike/copilot-agents/.codex/superpowers/skills/defense-in-depth
Source
Path:
.codex/superpowers/skills/defense-in-depth/SKILL.md(main)