v4.2.0

Manisso/fsocietyv4.2.0Jul 20, 2025by ravitemer

AI Summary

An update focused on configuration compatibility, adding full support for VS Code's `.vscode/mcp.json` format, including predefined variables, environment syntax, and JSON5 support.

Key Highlights

Full VS Code configuration format support
Support for VS Code predefined variables
JSON5 support for config files
Enhanced environment variable priority system
Seamless migration path for existing configs

New Features

VS Code environment variable syntax (`${env:...}`)
VS Code input variables via MCP_HUB_ENV
JSON5 support (comments and trailing commas)
Predefined variables (`${workspaceFolder}`, etc.)
Proper priority system for variable resolution

Full Release Notes


### Added

- **VS Code Configuration Compatibility**: Full support for `.vscode/mcp.json` configuration format
  - Support for `"servers"` key alongside existing `"mcpServers"` key
  - VS Code-style environment variable syntax: `${env:VARIABLE_NAME}`
  - VS Code predefined variables: `${workspaceFolder}`, `${userHome}`, `${pathSeparator}`, `${workspaceFolderBasename}`, `${cwd}`, `${/}`
  - VS Code input variables via `MCP_HUB_ENV`: support for `${input:variable-id}` syntax
  - JSON5 support for config files: comments and trailing commas now allowed
  - Seamless migration path: existing `.vscode/mcp.json` files work directly with MCP Hub

### Enhanced

- **Configuration System**: Enhanced environment variable resolution with VS Code compatibility
  - Proper priority system: predefined variables → process.env → MCP_HUB_ENV
  - Predefined variables available for placeholder resolution but not passed to server environments
  - Comprehensive test coverage for all VS Code variable types and scenarios