read-env-key

Environment Variable Key Reader

List environment variable keys without exposing their values. This skill provides safe access to environment variable names only.

Available Environment Variables

Current environment variable keys: !env | cut -d= -f1 | sort

Instructions

Use shell commands to list environment variable keys:

List all environment variable keys

env | cut -d= -f1 | sort

Filter environment variable keys

To filter keys by pattern (case-insensitive):

env | cut -d= -f1 | grep -i <pattern> | sort

Examples:

• env | cut -d= -f1 | grep -i GIT | sort - List all keys containing "GIT"
• env | cut -d= -f1 | grep -i GITHUB | sort - List all keys containing "GITHUB"
• env | cut -d= -f1 | grep -i TOKEN | sort - List all keys containing "TOKEN"

Check if a specific key exists

To check if a specific environment variable key exists:

if [ -n "${KEY_NAME+x}" ]; then echo "✓ KEY_NAME exists"; else echo "✗ KEY_NAME does not exist"; fi

Or using printenv:

if printenv KEY_NAME > /dev/null 2>&1; then echo "✓ KEY_NAME exists"; else echo "✗ KEY_NAME does not exist"; fi

Examples:

• if [ -n "${CODEMATE_GITHUB_TOKEN+x}" ]; then echo "✓ CODEMATE_GITHUB_TOKEN exists"; else echo "✗ CODEMATE_GITHUB_TOKEN does not exist"; fi
• if printenv API_KEY > /dev/null 2>&1; then echo "✓ API_KEY exists"; else echo "✗ API_KEY does not exist"; fi

Security Note

This skill is designed to ONLY read environment variable keys (names), never their values. This prevents accidental exposure of sensitive information like tokens, passwords, or API keys.

Prerequisites

• Must be run in a shell environment with environment variables set