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ontoskills

ontoskills

Active·★ 16·MIT·Updated 2026-05-11

★ Trending★ Observability★ Data Processing

OWL 2 skill compiler for deterministic AI agents — transforms SKILL.md into validated RDF/ Turtle ontologies with SHACL gatekeeper

OntoSkills transforms natural language skill definitions into validated OWL 2 ontologies—queryable knowledge graphs that enable deterministic reasoning for AI agents. It solves the problem of probabilistic LLM skill interpretation by compiling skills to ontologies and querying with SPARQL for exact answers.

#ai#ai-agent#description-logics#deterministic-ai#enterprise-ai#knowledge-graph#llm-tools#mcp

$ Install

$ npx ontoskills install mcp --claude

↗ Visit site ★ GitHub

01

Features

01Compiles natural language skill definitions into OWL 2 ontologies

02Uses SHACL validation for deterministic output

03Enables exact answers via SPARQL queries

04Modular architecture with Python compiler, Rust MCP server, and Node.js CLI

05Reduces context overhead: 100 skills from 500KB to 1KB queries

02

Compatibility

Python

Python 3.10+

Verified via docs

Node.js

Node.js 18+

Verified via docs

OWL 2 RDF/Turtle

OWL 2 RDF/Turtle

Verified via docs

SHACL Validation

SHACL Validation

Verified via docs

03

Quick start

1

$ npx ontoskills install mcp --claude

04

Use cases

↳Enterprise AI agents that need deterministic reasoning

↳Managing large skill libraries without context overflow

↳Democratizing intelligence for smaller LLMs via graph queries

05

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Comments

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H
Harley GarciaMay 13, 2026
Deterministic output means skills behave consistently, not probabilistically.
R
Riley ZhangMay 3, 2026
Ontology-based skill definition is more rigorous than natural language descriptions.
S
Spencer WilsonMay 3, 2026
Good for teams who want formally specified, verifiable agent capabilities.
M
Morgan HarrisMar 6, 2026
OWL 2 skill compiler that transforms SKILL.md into validated, deterministic agent skills.

On this page

01Features 02Compatibility 03Quick start 04Use cases 05Alternatives

Stats

GitHub Stars★ 16

Last commit2w ago

StatusActive

LicenseMIT

CategoryDev Tooling

Trend (30d)

+0.6↑ 0.7%

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