langium-ai

Guide for using the langium-ai (LAI) CLI to generate language descriptors, synthesize system prompts, run evaluations, and iteratively refine AI-powered tooling in Langium projects. Use when working with lai commands, descriptors, or evaluation files.

Generate or refine a language descriptor for a Langium DSL project. Bootstraps a new descriptor via `lai gen descriptor` if none exists, then guides refinement of paths, services, examples, documentation, and structure.

Expand and refine the evaluation suite for a Langium DSL project. Generates comprehensive eval files that cover syntactic correctness, semantic validity, user intent matching, edge cases, and language understanding.

Skill for generating a skill for understanding a specific Langium-based DSL. Used in cooperation with the lai & langium skills for understanding.

Generate a Model Context Protocol (MCP) server that exposes a Langium DSL's parser and validator as an MCP tool, allowing any MCP-compatible client to validate DSL code and receive diagnostics.

Generate or refine a system prompt for a Langium DSL project. Bootstraps a new system prompt via `lai gen sysprompt` if none exists, then guides targeted refinement based on evaluation results and language changes.

A comprehensive skill to understanding how Langium-based projects work — from grammar definition through code generation, runtime parsing, linking, validation, and LSP integration