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Plugins, agents, skills, and commands for Claude Code, Codex CLI, Cursor, OpenCode, Antigravity CLI, GitHub Copilot, and Pi, written once in Markdown and adapted to each tool by generators with validation and evals.
Data validation using Python type hints
SkillOpt is a text-space optimizer that trains reusable natural-language skills for frozen LLM agents through trajectory-driven edits, validation-gated updates, and deployable best_skill.md artifacts.
TypeScript-first schema validation with static type inference
📋 React Hooks for form state management and validation (Web + React Native)
:100:Go Struct and Field validation, including Cross Field, Cross Struct, Map, Slice and Array diving
MCP server for KiCad, connecting AI agents to schematic and PCB workflows, ERC/DRC validation, DFM checks, BOM analysis, and manufacturing preparation—with controlled edits and human-gated release workflows.
The most powerful data validation library for JS
Fly-connectome simulation controlling a live Doom arena, with experimental neural plasticity, spectator UI, and scientific validation reports.
Cross-platform PDF digital signing tool. JavaFX desktop UI with drag-to-place visible signatures, PKCS#11/PKCS#12 keystores, RFC 3161 timestamping, OCSP/CRL long-term validation, and a scriptable CLI.
Downloadable models and conversion recipes for Apple's Core AI on iPhone and Mac. Chat, vision, speech and generative models with per-model validation records, Swift examples through CoreAIKit, and a downloadable Mac app.
A configuration as code language with rich validation and tooling.
Yet Another Validation for Java (A lambda based type safe validation framework)
Dead simple Object schema validation
:hocho: An ActiveModel extension that automatically strips all attributes of leading and trailing whitespace before validation. If the attribute is blank, it strips the value to nil.
A TypeScript chess library for chess move generation/validation, piece placement/movement, and check/checkmate/draw detection
jQuery Validation Plugin library sources
The most awesome validation engine ever created for PHP
String validation
Lightweight javascript validator supporting Language Independent Validation Rules Specification (LIVR)
Clojure(Script) library for declarative data description and validation
Header-only C++ library for JSON Schema validation, with support for many popular parsers
loo R package for approximate leave-one-out cross-validation (LOO-CV) and Pareto smoothed importance sampling (PSIS)
Quick and Easy server testing/validation
Easy parameters validation/casting with Ecto.Schema, akin to Rails' strong parameters.
Graph+Semantics: Import/Export RDF from Neo4j. SHACL Validation, Model mapping and more.... If you like it, please ★ ⇧
An idiomatic Go (golang) validation package. Supports configurable and extensible validation rules (validators) using normal language constructs instead of error-prone struct tags.
Schema for data modeling & validation
JSON storage bins with schema validation
Coercion and validation for data structures