categories:
  - id: computational-infrastructure
    label: Computational Infrastructure
    description: Physical infrastructure interpreted as lawful state, witness, readout, and maintenance substrate.
    subcategories:
      - id: thermodynamic-witness
        label: Thermodynamic Witness
        description: Heat, steam, coolant, and pressure systems as readable evidence surfaces.
      - id: babcock-matrix
        label: Babcock Matrix
        description: Graph-aligned state matrices for pipes, roads, steam loops, coolant systems, and other infrastructure networks.
      - id: reservoir-substrates
        label: Reservoir Substrates
        description: Physical reservoir computing and substrate-inversion arguments across water, weather, roads, bridges, and city systems.
      - id: privacy-preserving-infrastructure
        label: Privacy-Preserving Infrastructure
        description: Asset-state diagnostics that avoid identity tracking and behavioral surveillance.

  - id: formal-systems
    label: Formal Systems
    description: Lean, theorem-bearing specifications, semantic primitives, and proof-oriented artifacts.
    subcategories:
      - id: semantics
        label: Semantics
        description: Semantic substrate, binding, routing, and invariant surfaces.
      - id: compression
        label: Compression
        description: Hutter, GCL, MISC, GENSIS, and related compression-oriented theory.
      - id: verification
        label: Verification
        description: Executable checks, proof gates, build evidence, and formal audit trails.

  - id: speculative-engineering
    label: Speculative Engineering
    description: Early technical concepts, invention notes, mechanisms, and publishable exploratory design arguments.
    subcategories:
      - id: infrastructure-design
        label: Infrastructure Design
        description: Concepts for civil, hospital, datacenter, utility, and maintenance systems.
      - id: substrate-design
        label: Substrate Design
        description: Nonstandard computational media and physical state-transition substrates.