Langium-AI (LAI)

What it does

A command-line toolkit that inspects a Langium project, generates a structured language descriptor, synthesizes system prompts from that descriptor, and runs evaluation suites to measure and improve prompt quality. It supports an iterative loop: generate descriptor → create sys prompt → evaluate → analyze → refine.

When to use it

Use LAI when you are building or maintaining a Langium-based DSL and need to automate descriptor creation, prompt engineering, and evaluation of LLM-driven tooling tied to your language. Ideal for bootstrapping integrations, generating system prompts, and running repeatable evals against models.

What's included

• Scripts: CLI commands (init, gen descriptor, validate, gen sysprompt, evaluate, history, show, compare, stats, export) described in the skill.
• References: No external references detected in the repo metadata, but the skill includes evaluation examples and configuration patterns.
• Instructions: Step-by-step workflow for initializing a project, generating and refining descriptors, creating system prompts, writing .eval.ts evaluation files, running evaluations, and analyzing results.

Compatible agents

Best suited for agents and tooling that can run CLI workflows and TypeScript-based evaluation code (e.g., developer-focused agents, Copilot/Codex-style integrations, CLAUDE/LLM-based evaluation runners).