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jsont

Encode and decode JSON data with type-safe OCaml codecs.

46|6|Updated Jan 28, 2026
Search Tags:#json#encoding#type-safe#codec#ocaml#decoding#Jsont
One-click install
npx skills add https://github.com/aresbit/MateBot --skill jsont
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: jsont
Source: https://github.com/aresbit/MateBot/tree/main/skills/ocaml/jsont
Command: npx skills add https://github.com/aresbit/MateBot --skill jsont

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This Skill provides a type-safe approach to encoding and decoding JSON in OCaml by leveraging the jsont library. It helps you define codecs for OCaml records, ensuring JSON structures conform to your types and preventing runtime errors during data exchange.

Core Features & Use Cases

  • Type-safe object codecs: Define codecs for OCaml records using Jsont.Object to map required fields
  • Optional fields and defaults: Use opt_mem to handle missing fields with sensible defaults
  • Nested structures and lists: Compose codecs for nested objects, lists, and maps; support null values with Jsont.null
  • Practical use cases: Parse JSON responses from APIs, validate configuration files, and serialize OCaml data to JSON

Quick Start

Start by adding the Jsont dependency to your OCaml project, then create a module defining your data types and their codecs. Use decode and encode helpers to convert between JSON and OCaml values.

Frequently Asked Questions about jsont

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I parse JSON in OCaml without runtime errors?▼

Type-safe JSON parsing in OCaml requires defining Jsont.Object codecs for your records to map required fields, ensuring structures conform to your types and preventing runtime errors during data exchange.

How do I handle optional fields when decoding JSON in OCaml?▼

To handle optional fields when decoding JSON in OCaml, use the opt_mem function within your Jsont.Object codecs to manage missing fields and apply sensible default values automatically.

Can I serialize nested structures and lists to JSON in OCaml?▼

Yes, you can serialize nested structures and lists to JSON in OCaml by composing multiple Jsont codecs, which support mapping nested objects, lists, maps, and null values.

What is the best way to load configuration files in OCaml using type-safe codecs?▼

Loading configuration files in OCaml using type-safe codecs involves defining Jsont.Object codecs for your configuration records and using decode helpers to validate and convert JSON data into reliable OCaml values.

Does the Jsont library support null values in OCaml JSON decoding?▼

Yes, the Jsont library supports null values in OCaml JSON decoding and encoding workflows by utilizing Jsont.null to properly handle missing or explicitly null data within nested structures.

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