Module sources 

2026-09-28: The circuit texts this binary was built from: INSTANCES.toml, the circuits, their block libraries, the precision tables and each hardware’s FUSIONS.toml, embedded so a plan matches the kernels compiled in. met circuit and the executor both read them here.

Owner: model-layers circuit executor. Invariants:

• One copy of every text: the CLI and the executor never embed their own.
• A lookup of a name the tables lack is an error, never a fallback to another entry.

Constants

BLOCKS

2026-09-28: Every block library a circuit can include.

CHECKPOINTS

2026-09-28: Every checkpoint plan fixture an instance can name.

CIRCUITS

2026-09-28: Every circuit an instance can name, by arch.

FUSIONS

2026-09-28: FUSIONS.toml per hardware.

INSTANCES

2026-09-28: kernels/circuits/INSTANCES.toml as built.

PRECISION

2026-09-28: Every precision table an instance can name.

Functions

checkpoint_shape

2026-09-30: The shape a served checkpoint runs: its config.json through the circuit’s config map (metrale_circuit::map_checkpoint, the one config-to-shape mapping), with vocab at the served vocabulary: ModelConfig::vocab_size after the server caps it to the tokenizer (cap_vocab_size_to_tokenizer). served_shape then checks it against INSTANCES.toml.

instance

2026-09-28: The instance serving recipe.

instance_for

2026-09-28: The instance whose checkpoint and kernel target are these. Several recipes may serve one checkpoint on one target; they must then agree on the circuit and the precision source, the only parts the executor takes from an instance (the policy, and 2026-09-30 a policy precision’s tier and kernel capabilities, are read live: CircuitExec::build).

lookup

2026-09-28: The entry key of table; what names the table in the error.

served_shape

2026-09-28: The shape a served model runs, checked against the instance’s stated shape. Every dim must agree except vocab, which the server caps to the tokenizer’s vocabulary (cap_vocab_size_to_tokenizer) and so may be smaller; the served value is the one the logits are sized by, so the plan is instantiated with it.

shape_drift

2026-09-28: Every way from_config disagrees with the instance’s stated shape.

sources

2026-09-28: The embedded texts instance is built from.