HN Showcase
Back to browse
jsoncompat – a library to detect/fuzz breaking changes in JSON schemas

jsoncompat – a library to detect/fuzz breaking changes in JSON schemas

by rogaos·Apr 6, 2026·7 points·1 comment
Visit ProjectView on HN

AI Analysis

●●SolidBig BrainSolve My Problem

Detects breaking JSON schema changes and generates test data.

Strengths
  • •Multi-platform engine ensures consistent behavior across Rust, Python, and browser.
  • •Fuzzing and generating sample data automates regression testing for schemas.
Weaknesses
  • •JSON Schema evolution is often solved by switching to Protobuf.
  • •Niche appeal compared to general validation libraries like AJV.
Target Audience

Backend developers and API maintainers managing schema versions

Similar To

OpenAPI Diff · Schemathesis

Similar Projects

Developer Tools●●Solid

VibeDiff – Blocks Claude Code from shipping breaking changes

Claude Code safety gate that blocks breaking changes; solves real foot-gun but limited to one AI tool.

Solve My ProblemShip It
Boussettah
103mo ago