NETCONF Language Support

Write NETCONF/YANG files with the NETCONF Language Server — available for Visual Studio Code and Open VSX–compatible editors (VSCodium, Cursor, …).

Why

🎯 Semantic Oriented — 🧠 read with insight · ✍️ write with ease
🦀 Native Rust — 0️⃣ zero runtime · 🚀 just launch
⚡ Blazing Fast — 🚅 165k-file YangModels/yang <1 s startup, ~25 s lazy find-all-references (16-thread host) · 📊 benchmarks

Features

Read — diagnostics & hover:

Write — completion:

For more details, see the LSP features guide in the repo.

Configuration

• netconf.indentSize (default 2): spaces per indentation level when formatting.

• netconf.semantic (default {}): per-role YANG semantic-highlight classification. Each member is one construct family (moduleName, typeRef, dataNodeName, definitionName, enumAndBitNames, units, rangeLength, patternArg, vendorExtension, … — 20 roles total) and its value is an object picking the semantic token type ("enumMember", "property", … — any standard type) and the modifiers (multi-select: "readonly", "declaration", …). A role left out keeps its built-in classification (notably pattern args are regexp, and status deprecated; declarations get the deprecated modifier on their whole subtree). The server announces the full standard legend, so changes apply live — no server restart. Example:

  "netconf.semantic": {
    "enumAndBitNames": { "token": "enumMember" },
    "units": { "token": "variable", "modifiers": ["readonly"] }
  }
  

To render status deprecated; declarations struck through, add the rule to your settings (VS Code reads editor.semanticTokenColorCustomizations at the theme layer, so this is opt-in rather than an extension default). The selector is explicitly scoped to YANG so it never affects other languages:

"editor.semanticTokenColorCustomizations": {
  "rules": { "*.deprecated:yang": { "strikethrough": true } }
}

References

• YANG
• NETCONF
• YANG 1.1
• YANG JSON Encoding
• YANG Library