Claude Code using AGENTS.md. Copy this to your user settings under ~/.claude/

agentsmd_symlink.sh

#!/bin/bash

# Check if AGENTS.md exists in the project directory
if [ -f "$CLAUDE_PROJECT_DIR/AGENTS.md" ]; then
    cd "$CLAUDE_PROJECT_DIR"
    
    if [ ! -L "CLAUDE.md" ] || [ "$(readlink CLAUDE.md)" != "AGENTS.md" ]; then
        # Remove existing CLAUDE.md if it's not the right symlink
        [ -e "CLAUDE.md" ] && rm "CLAUDE.md"
        
        # Create the symlink in the project directory
        ln -s AGENTS.md CLAUDE.md
        echo "Created symlink in $PROJECT_DIR: CLAUDE.md -> AGENTS.md"
    fi
fi

settings.json

{
  "$schema": "https://json.schemastore.org/claude-code-settings.json",
  "hooks": {
    "SessionStart": [
      {
        "matcher": "startup",
        "hooks": [
          {
            "type": "command",
            "command": "~/.claude/hooks/agentsmd_symlink.sh"
          }
        ]
      }
    ]
  }