Env Manager

Environment Manager

This skill provides intelligent environment variable management for Claude Code. It handles detection of missing variables, parsing of various .env file formats, and provides appropriate commands for different shells.

When to Use This Skill

AUTOMATICALLY use this skill when:

• User asks to test anything (web pages, APIs, etc.) - testing ALWAYS needs environment
• User asks to run tests, check functionality, or verify pages work
• Starting tasks that need configuration (deployment, API integration, database work)
• Any script or command fails with environment-related errors
• You detect phrases like "missing", "not set", "required", "environment" in error messages
• User mentions specific pages to test (e.g., "test the billing page", "check the login form")
• Beginning work on web applications, APIs, or services

CRITICAL: If the user says "test the X page" or similar, invoke this skill FIRST before writing any test code.

DO NOT wait for the user to ask - proactively invoke this skill when environment issues are likely. DO NOT check for .env files or write environment loading code - that's what THIS skill does.

Key Features

• Shell Detection: Automatically detects user's shell (bash, zsh, fish)
• Format Recognition: Understands multiple .env file formats:
• Shell format: export VAR=value
• Simple format: VAR=value
• Commented files with # comments
• Smart Loading: Recommends the right tool for the job:
• source for shell-formatted files
• export for inline variable setting
• dotenv command for simple format files (if available)
• Project Awareness: Searches project directory for .env files
• Frictionless UX: Provides copy-paste commands for users

Helper Scripts

• scripts/check_env.py - Check if required environment variables are set
• scripts/detect_env_files.py - Find and analyze .env files in project
• scripts/load_env.sh - Shell script to load environment variables

Usage Patterns

Pattern 1: Check for Required Variables

import subprocess
import json

result = subprocess.run(
    ['python', '~/.claude/skills/env-manager/scripts/check_env.py',
     '--required', 'VAR1,VAR2,VAR3'],
    capture_output=True,
    text=True
)
info = json.loads(result.stdout)

if not info['all_present']:
    # Handle missing variables
    print(f"Missing: {info['missing']}")

Pattern 2: Find and Suggest .env Files

result = subprocess.run(
    ['python', '~/.claude/skills/env-manager/scripts/detect_env_files.py'],
    capture_output=True,
    text=True
)
files = json.loads(result.stdout)

for file_info in files:
    print(f"Found: {file_info['path']}")
    print(f"Format: {file_info['format']}")
    print(f"Load command: {file_info['load_command']}")

Environment File Formats

Shell Format (Recommended)

# .env file
export DATABASE_URL=postgres://localhost/db
export API_KEY=secret123
export DEBUG=true

Load with: source .env

Simple Format

# .env file
DATABASE_URL=postgres://localhost/db
API_KEY=secret123
DEBUG=true

Load with: dotenv command or manually set with export

Fish Shell Format

# .env.fish file
set -x DATABASE_URL postgres://localhost/db
set -x API_KEY secret123
set -x DEBUG true

Load with: source .env.fish

Integration with Other Skills

Other skills should delegate environment management to this skill:

# In another skill's script
from pathlib import Path
import subprocess
import sys

# Check for required environment variables
check_cmd = [
    'python',
    str(Path.home() / '.claude/skills/env-manager/scripts/check_env.py'),
    '--required', 'VAR1,VAR2',
    '--role', 'user'
]

result = subprocess.run(check_cmd, capture_output=True, text=True)
if result.returncode != 0:
    print("Environment not configured. Run env-manager skill first.")
    sys.exit(1)

Best Practices

1. Always check environment before running tasks that require specific variables
2. Provide clear feedback about which variables are missing
3. Suggest concrete commands for users to run
4. Respect user's shell choice - don't assume bash
5. Don't modify environment files - only read and suggest

Shell Compatibility

| Shell | Detection | .env Loading | Variable Setting | |-------|-----------|--------------|------------------| | bash | ✓ | source | export VAR=val | | zsh | ✓ | source | export VAR=val | | fish | ✓ | source | set -x VAR val | | sh | ✓ | . | export VAR=val |

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: scott2b
• Source: scott2b/claude-skills
• License: Apache-2.0

Install and usage instructions live in the source repository linked above.