Module config_map 

2026-09-30: The declarative config mapping of one architecture (kernels/circuits/<arch>.config.toml): how a checkpoint’s config.json becomes the arch shape a circuit instantiates under (layer kinds, dims) and the math parameters the kernels read, with every key the config carries classified.

Owner: metrale-circuit. Invariants:

• PCND: every key of the mapped object is classified (a dim, a param, a required value, a nested object, or ignorable with a stated reason). An unclassified key is refused with its path; a math-changing key the circuit does not model is refused by its rule, never silently dropped.
• An absent key takes the default its rule states (the Hugging Face class default, cited in the TOML); a requirement applies to a present (or defaulted) value, and an absent key without a default is simply absent. A dim with no default is required.
• JSON null is absent.

Structs

ConfigMap

2026-09-30: A parsed config map.

MappedConfig

2026-09-30: What a config maps to.

Enums

ConfigMapError

2026-09-30: Why a config did not map.

Functions

map_config

2026-09-30: Map config (the whole config.json) under map.