PRD: Functional Scope Overview

5. Functional Scope

5.1 Current Scope

• G1, G2, G3, G4 syntax, diagnostics, and typed lowering
• fail-fast lowering at the first error line
• JSON round-trip support for message results

5.2 Next Scope

• prioritized extension of additional G and M families
• richer syntax coverage and diagnostics
• API facade hardening and file-based API convenience

5.2.1 Executable-Action Modeling Contract

Architecture rule:

• every machine-carried action must be represented as an explicit executable instruction in IR
• packetization is optional per instruction family
• parse-only metadata may remain non-executable

Each new machine-action feature must define:

• instruction kind and payload
• execution path:
  • packet
  • runtime/control path
• deterministic diagnostic and policy behavior