REPL Development
Expert skill for building interactive REPLs with rich editing and evaluation features
Best use case
REPL Development is best used when you need a repeatable AI agent workflow instead of a one-off prompt.
Expert skill for building interactive REPLs with rich editing and evaluation features
Teams using REPL Development should expect a more consistent output, faster repeated execution, less prompt rewriting.
When to use this skill
- You want a reusable workflow that can be run more than once with consistent structure.
When not to use this skill
- You only need a quick one-off answer and do not need a reusable workflow.
- You cannot install or maintain the underlying files, dependencies, or repository context.
Installation
Claude Code / Cursor / Codex
Manual Installation
- Download SKILL.md from GitHub
- Place it in
.claude/skills/repl-development/SKILL.mdinside your project - Restart your AI agent — it will auto-discover the skill
How REPL Development Compares
| Feature / Agent | REPL Development | Standard Approach |
|---|---|---|
| Platform Support | Not specified | Limited / Varies |
| Context Awareness | High | Baseline |
| Installation Complexity | Unknown | N/A |
Frequently Asked Questions
What does this skill do?
Expert skill for building interactive REPLs with rich editing and evaluation features
Where can I find the source code?
You can find the source code on GitHub using the link provided at the top of the page.
SKILL.md Source
# 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
```json
{
"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" }
}
}
}
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