{
  "skill": {
    "id": "skl_xcode_footprint_audit",
    "name": "xcode-footprint-audit",
    "plugin": "cwc-xcode-engineering",
    "description": "Audit the real Xcode-toolchain disk footprint on this Mac as typed JSON — what IS installed (xcode-select path, Swift toolchain, /Applications/ Xcode*.app glob, simctl availability) and what disk the support artifacts actually hold (DerivedData, iOS DeviceSupport, CoreSimulator), each check {id, present, detail, disk_bytes?} with honest absence, never assuming anything exists. The \"check before blaming\" tool for disk-full incidents: this Mac's recurring 100%-full episodes were Xcode-beta + its artifacts, while Docker.raw and Time Machine snapshots were false leads. Use when disk is filling up, before deleting anything Xcode-shaped, when asked \"is Xcode installed\", \"what's eating my disk\", \"how big is DerivedData\", or before/ after installing or removing an Xcode. Trigger on \"footprint\", \"disk audit\", \"DerivedData size\", \"DeviceSupport\", \"simulator disk\". Do NOT use for toolchain version/SDK probing before builds (xcode-toolchain-trace owns that) or for actually deleting artifacts — this skill is read-only; deletion is the operator's call.",
    "summary": "Audit the real Xcode-toolchain disk footprint on this Mac as typed JSON — what IS installed (xcode-select path, Swift toolchain, /Applications/ Xcode*.app glob, simctl availability) and what disk the support artifacts actually hold (DerivedData, iOS DeviceSupport, CoreSimulator), each check {id,...",
    "gated": 0,
    "source_path": "plugins/cwc-xcode-engineering/skills/xcode-footprint-audit/SKILL.md",
    "created_at": "2026-07-10 18:13:13",
    "cite_as": "https://subagentskills.com/api/skills/skl_xcode_footprint_audit"
  }
}