Explains Langium-based DSL tooling grammar-to-LSP integration and debugging workflows.
npx skills add https://github.com/eclipse-langium/langium-ai --skill langium
Please help me install this Agent Skill. Skill: langium Source: https://github.com/eclipse-langium/langium-ai/tree/main/skills/langium Command: npx skills add https://github.com/eclipse-langium/langium-ai --skill langium
Langium-based projects can be difficult to navigate because behavior is spread across grammar syntax, generated artifacts, a dependency-injection runtime, document state processing, linking, validation, and LSP wiring.
.langium grammar to runtime parsing, linking, validation, and LSP integration.ast.ts, grammar.ts, and module.ts are produced and how they affect runtime behavior.Ask an agent to use this guide to explain how a specific Langium DSL file is parsed, linked, validated, and surfaced through LSP in your project.
High-intent search queries and answers about installing and using this skill.
Langium parses a DSL file by applying grammar syntax to generate runtime artifacts, which then drive scope computation, cross-reference resolution, and document state transitions to produce a linked AST.
You override Langium validation and parsing services by composing custom dependency injection modules that replace or extend default generated services in module.ts, directly altering runtime behavior and IDE features.
The Langium DocumentState pipeline tracks document processing transitions from parsing through indexing, controlling when scope computation and name resolution execute to resolve cross-references accurately during linking.
Langium generated artifacts like ast.ts and grammar.ts provide typed AST interfaces and parser logic that the module.ts file wires into the LSP server to surface validation diagnostics and IDE features.
Langium cross-reference resolution fails when scope computation returns no valid candidates or document state has not reached the indexed phase. Debugging scope provider implementation and indexing mechanics identifies missing name resolution mappings.
Langium builds custom DSLs with full LSP support by defining grammar syntax in a .langium file, generating parser and AST artifacts, and wiring validation and linking services through dependency injection for end-to-end IDE features.
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