name: REPL Development description: Expert skill for building interactive REPLs with rich editing and evaluation features category: Tooling allowed-tools:

• Read
• Write
• Edit
• Glob
• Grep
• Bash

REPL Development Skill

Overview

Expert skill for building interactive REPLs with rich editing and evaluation features.

Capabilities

• Implement readline integration with history
• Handle multi-line input detection
• Implement tab completion for identifiers
• Design incremental compilation for REPL
• Handle top-level expression evaluation
• Implement persistent REPL state
• Design pretty-printing for values
• Support special REPL commands (:help, :type, etc.)

Target Processes

• repl-development.js
• interpreter-implementation.js
• lsp-server-implementation.js

Dependencies

• rustyline
• readline libraries
• linenoise

Usage Guidelines

1. Line Editing: Use established readline libraries for robust line editing
2. Multi-line: Detect incomplete expressions for multi-line input
3. Completion: Implement context-aware tab completion
4. History: Persist history across sessions
5. Commands: Provide useful meta-commands (:help, :type, :quit, etc.)

Output Schema

{
  "type": "object",
  "properties": {
    "lineLibrary": {
      "type": "string",
      "enum": ["readline", "rustyline", "linenoise", "custom"]
    },
    "features": {
      "type": "array",
      "items": { "type": "string" }
    },
    "commands": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "name": { "type": "string" },
          "description": { "type": "string" }
        }
      }
    },
    "generatedFiles": {
      "type": "array",
      "items": { "type": "string" }
    }
  }
}