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clojure-write

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Guide Clojure and ClojureScript development using REPL-driven workflow, coding conventions, and best practices. Use when writing, developing, or refactoring Clojure/ClojureScript code.

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metabase/metabase
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.claude/skills/clojure-write/SKILL.md

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January 23, 2026

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npx add-skill https://github.com/metabase/metabase/blob/48327532c5ff86da92c31257ba54b960c3badb43/.claude/skills/clojure-write/SKILL.md -a claude-code --skill clojure-write

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.claude/skills/clojure-write/
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Instructions

# Clojure Development Skill

## Tool Preference

When `clojure-mcp` tools are available (e.g., `clojure_eval`, `clojure_edit`), **always use them**
instead of shell commands like `./bin/mage -repl`. The MCP tools provide:
- Direct REPL integration without shell escaping issues
- Better error messages and feedback
- Structural Clojure editing that prevents syntax errors

Only fall back to `./bin/mage` commands when clojure-mcp is not available.

@./../_shared/development-workflow.md
@./../_shared/clojure-style-guide.md
@./../_shared/clojure-commands.md

## REPL-Driven Development Workflow

- Start with small, fundamental functions:
- Identify the core features or functionalities required for your task.
- Break each feature down into the smallest, most basic functions that can be developed and tested independently.
- Write and test in the REPL:
  - Write the code for each small function directly in the REPL (Read-Eval-Print Loop).
  - Test it thoroughly with a variety of inputs, including typical use cases and relevant edge cases, to ensure it
    behaves as expected.
- Integrate into source code:
  - Once a function works correctly in the REPL, move it from the REPL environment into your source code files (e.g.,
    within appropriate namespaces).
- Gradually increase complexity:
  - Build upon tested, basic functions to create more complex functions or components.
  - Compose smaller functions together, testing each new composition in the REPL to verify correctness step by step.
- Ensure dependency testing:
  - Make sure every function is fully tested in the REPL before it is depended upon by other functions.
  - This ensures that each layer of your application is reliable before you build on it.
- Use the REPL fully:
  - Use the REPL as your primary tool to experiment with different approaches, iterate quickly, and get immediate
    feedback on your code.
- Follow functional programming principles:
  - Keep functions small, focused, and composable.
  - Use Clojure'

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