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EACL Project

Clojure MCP Server (clojure-mcp-eacl)

This project uses the clojure-mcp-eacl MCP server for file operations and REPL evaluation. Always prefer MCP tools over built-in tools for reading, editing, and creating files.

Starting the MCP Server

The MCP server is configured to start automatically when Claude Code launches. If it's not running:

  1. Restart Claude Code, or
  2. Run manually: clojure -Tmcp start :config-profile :cli-assist :port 7889

The :mcp alias is defined in ~/.clojure/deps.edn.

Available MCP Tools

Use these tools instead of built-in equivalents:

Task Use MCP Tool NOT
Read file mcp__clojure-mcp-eacl__file_read Read tool
Edit file mcp__clojure-mcp-eacl__file_edit Edit tool
Create file mcp__clojure-mcp-eacl__file_write Write tool
List files mcp__clojure-mcp-eacl__list_directory Bash(ls)
Find files mcp__clojure-mcp-eacl__glob_files Glob tool
Search content mcp__clojure-mcp-eacl__grep_search Grep tool
Evaluate Clojure mcp__clojure-mcp-eacl__eval Bash(clj-nrepl-eval)

Clojure REPL Evaluation

The MCP server maintains a persistent nREPL session. Use mcp__clojure-mcp-eacl__eval for:

  • Evaluating Clojure expressions
  • Requiring namespaces (use :reload to pick up changes)
  • Running tests
  • Inspecting data structures

Example workflow:

;; Require namespace with reload
(require '[eacl.core :as eacl] :reload)

;; Evaluate expressions
(eacl/some-function arg1 arg2)

;; Run tests
(require '[clojure.test :refer [run-tests]])
(run-tests 'eacl.core-test)

Troubleshooting

If MCP tools are unavailable:

  1. Check if server is running: look for clojure-mcp-eacl in MCP server list
  2. Restart Claude Code to reconnect
  3. Port 7889 must be available