Nested Code — VS Code + Acode

A shared language engine with separate editor adapters for highlighting nested data and embedded languages without replacing each editor's normal syntax mode.

Initial scope

• Deeply nested JSON objects and arrays
• JSON token ranges with nesting depth
• VS Code semantic-token adapter
• Acode adapter shell designed to preserve the active editor mode

Planned embedded-language pipeline

Host languages:

• JavaScript
• TypeScript
• Kotlin
• C++
• Swift

Embedded languages:

• HTML
• XML
• CSS
• JavaScript inside HTML <script> blocks
• CSS inside HTML <style> blocks

The parser will support transitions such as:

TypeScript -> template string -> HTML -> ${expression} -> TypeScript -> HTML

and:

Swift -> multiline string -> XML/HTML -> Swift interpolation -> XML/HTML

Architecture

packages/
  core/       shared parsing, language detection, token ranges, recovery
  vscode/     VS Code-specific rendering/integration
  acode/      Acode-specific rendering/integration

The shared core is not installed globally and does not take control of either editor. Each extension packages and calls it internally.

Development

npm install
npm test
npm run build

Next

1. Harden JSON/JSONC parsing and malformed-document recovery.
2. Wire Acode token decorations.
3. Add host string scanners for JS/TS, Kotlin, C++, and Swift.
4. Add HTML/XML parsing and interpolation boundaries.
5. Add CSS and <script> / <style> language transitions.