{
  "hli_id": "HLI-STORAGE-001",
  "version": "v0.1-stub",
  "route": "/hli/storage/upload",
  "method": "POST",
  "type": "REQUEST",
  "status": "stub",
  "target_phase": "P2",
  "input": {
    "type": "object",
    "required": ["filename"],
    "properties": {
      "filename": { "type": "string" },
      "content_type": { "type": "string" }
    }
  },
  "output": {
    "type": "object",
    "properties": {
      "status": { "type": "string", "enum": ["not_implemented"] },
      "phase": { "type": "string" }
    }
  },
  "changelog": [
    { "date": "2026-03-26", "note": "501 stub — Phase 0 占位，P2 实现" }
  ]
}