Research note: Model specifications and benchmark results are time-bound. Check the dated primary sources below before using them for a technical or purchasing decision.

Language models are probabilistic text generators. In mission-critical backend systems, probabilistic responses must be constrained by deterministic type contracts using Pydantic, Zod, and finite state machines.

1. Strict Schema Enforcement in TypeScript

import { z } from 'zod';

export const AgentPlanSchema = z.object({
  stepIndex: z.number().int().positive(),
  action: z.enum(['read_file', 'modify_file', 'run_test']),
  targetPath: z.string().min(1),
  rationale: z.string().max(200)
});

Sources & Standards

  • • Zod Type System: zod.dev — TypeScript-first schema validation.
  • • Pydantic Data Validation: pydantic.dev.