[
  {
    "kind": "other",
    "name": "National Energy System Operator Carbon Intensity API, national historical actual series",
    "source": "https://api.carbonintensity.org.uk/",
    "details": "Public aggregate half-hourly national estimates, source interval starts in 2023-2025. CC BY 4.0. Original responses are losslessly compressed with exact raw and archive hashes in data/SOURCES.json. Provider: National Energy System Operator. API documentation: https://carbon-intensity.github.io/api-definitions/. Terms: https://github.com/carbon-intensity/terms. No provider endorsement is implied."
  },
  {
    "kind": "software",
    "name": "Python 3.12 standard library",
    "source": "https://www.python.org/",
    "details": "Pinned container digest in env/Dockerfile. Reproduction runs analyze.py and validate.py offline. fetch.py records acquisition and is not run during reproduction."
  }
]