Developer guides on JSON, TypeScript, Zod, LLMs, and modern tooling.
Every malformed JSON response your agent produces is evidence about how it fails. Instead of repair-and-forget, log the failures, cluster them, and feed them back into your prompts.
Everything you need to know about OpenAI function calling and Structured Outputs in 2026 — schemas, strict mode, tool choice, and production patterns.
LLMs produce unreliable JSON. Here's the production-grade pattern for parsing, repairing, and validating LLM output with Zod — with real error handling.
Three mature validation libraries, three different design philosophies. Here's when to use Zod, Yup, or Joi — with real performance numbers and migration advice.
JSON.parse throws cryptic errors. Here are the 7 errors you'll hit most often, what they mean, and the exact fix for each.
LLMs produce broken JSON constantly — trailing commas, single quotes, Python literals, markdown fences. Here's why it happens and how to fix it in production.