Model contract and hooks

A PRISM model must build from declared files without hidden network access. Validators inspect architecture metadata and run fixed-seed forward passes before reward-bearing benchmarks.

• Build from manifest config and artifact paths.
• Expose parameter count and context length.
• Run a minimal forward pass.
• Export architecture metadata for review pages.
• Fail closed on missing artifacts or checksum mismatch.

Hooks separate architecture inspection from training variant evaluation.

type PrismHooks = {
  buildModel(ctx: BuildContext): Promise<ModelHandle>;
  describeArchitecture(model: ModelHandle): Promise<ArchitectureReport>;
  trainVariant?(ctx: TrainContext): AsyncIterable<TrainingMetric>;
  evaluate(ctx: EvalContext): Promise<EvaluationReport>;
};