Agent skill

Env Manager

Environment variable validation, security scanning, and management for Next.js, Vite, React, and Node.js applications

Custom licenceAuto-check: notesDevOps & Cloud

Install Env Manager

skills CLI

$ npx skills add bobmatnyc/claude-mpm --skill env-manager -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install bobmatnyc/claude-mpm env-manager --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/bobmatnyc/claude-mpm.git skills-src && mkdir -p .claude/skills && cp -r skills-src/plugin/skills/universal-infrastructure-env-manager .claude/skills/env-manager && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "env-manager" agent skill from https://github.com/bobmatnyc/claude-mpm/tree/main/plugin/skills/universal-infrastructure-env-manager into .claude/skills/env-manager/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "env-manager", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/bobmatnyc/claude-mpm/tree/main/plugin/skills/universal-infrastructure-env-manager

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add bobmatnyc/claude-mpm --skill env-manager -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install bobmatnyc/claude-mpm env-manager --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/bobmatnyc/claude-mpm.git skills-src && mkdir -p .agents/skills && cp -r skills-src/plugin/skills/universal-infrastructure-env-manager .agents/skills/env-manager && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "env-manager" agent skill from https://github.com/bobmatnyc/claude-mpm/tree/main/plugin/skills/universal-infrastructure-env-manager into .agents/skills/env-manager/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "env-manager", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add bobmatnyc/claude-mpm --skill env-manager -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install bobmatnyc/claude-mpm env-manager --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/bobmatnyc/claude-mpm.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/plugin/skills/universal-infrastructure-env-manager .cursor/skills/env-manager && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "env-manager" agent skill from https://github.com/bobmatnyc/claude-mpm/tree/main/plugin/skills/universal-infrastructure-env-manager into .cursor/skills/env-manager/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "env-manager", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/bobmatnyc/claude-mpm.git --path plugin/skills/universal-infrastructure-env-manager

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add bobmatnyc/claude-mpm --skill env-manager -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install bobmatnyc/claude-mpm env-manager --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/bobmatnyc/claude-mpm.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/plugin/skills/universal-infrastructure-env-manager .gemini/skills/env-manager && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "env-manager" agent skill from https://github.com/bobmatnyc/claude-mpm/tree/main/plugin/skills/universal-infrastructure-env-manager into .gemini/skills/env-manager/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "env-manager", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install bobmatnyc/claude-mpm env-manager

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add bobmatnyc/claude-mpm --skill env-manager -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/bobmatnyc/claude-mpm.git skills-src && mkdir -p .github/skills && cp -r skills-src/plugin/skills/universal-infrastructure-env-manager .github/skills/env-manager && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "env-manager" agent skill from https://github.com/bobmatnyc/claude-mpm/tree/main/plugin/skills/universal-infrastructure-env-manager into .github/skills/env-manager/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "env-manager", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add bobmatnyc/claude-mpm --skill env-manager -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install bobmatnyc/claude-mpm env-manager --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/bobmatnyc/claude-mpm.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/plugin/skills/universal-infrastructure-env-manager .opencode/skills/env-manager && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "env-manager" agent skill from https://github.com/bobmatnyc/claude-mpm/tree/main/plugin/skills/universal-infrastructure-env-manager into .opencode/skills/env-manager/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "env-manager", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: env-manager
GitHub stars: 155
Token cost: ~3.9k tokens
SKILL.md length: 1,099 words
Files: 9 (incl. references)
Skills in repo: 52
Repo updated: Aug 31, 2026
First seen: Oct 7, 2026
Licence: Custom licence

At a glance

Environment variable validation, security scanning, and management for Next.js, Vite, React, and Node.js applications

Works in 4 steps: Never Logs Secrets: env-manager NEVER… → Client-Exposure Detection: Warns when… → Secret Sanitization: When generating… → …
Tasks that involve Secrets management
SKILL.md covers Overview, Why Use env-manager?, Quick Start and Usage Examples, plus 6 more sections
Calls python3, git and make; needs API_KEY and STRIPE_SECRET_KEY

What it does

Env Manager is an agent skill from bobmatnyc/claude-mpm. Environment variable validation, security scanning, and management for Next.js, Vite, React, and Node.js applications

Its SKILL.md is about 3.9k tokens, which your agent loads only when the skill is triggered. The skill folder holds 9 other files, including reference files (for example `.etag_cache.json`, `metadata.json` and `references/.etag_cache.json`).

It sits in DevOps & Cloud, covering Secrets management. It works with Next.js, React, Node.js and Vite. The repository describes itself as: Claude Multi-Agent Project Manager — multi-channel orchestration, GitHub-first SDK mode, and plugin system for Claude.

When your agent uses it

Tasks that involve Secrets management

Example prompts

“/env-manager”

Requirements

Python 3
Node.js
A credential in NEXT_PUBLIC_API_KEY
A credential in STRIPE_SECRET_KEY

Workflow steps

4 steps, taken from the first numbered list in SKILL.md.

Never Logs Secrets: env-manager NEVER displays actual secret values in output
Client-Exposure Detection: Warns when secrets are in NEXT_PUBLIC_, VITE_, REACT_APP_ variables
Secret Sanitization: When generating .env.example, replaces secrets with safe placeholders
No Network Calls: All validation is local, no data leaves your machine

What it can do on your machine

Read from SKILL.md and the folder at commit 25203d3. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
- python3
- git
- make
From the folder's file list and the shell code blocks in SKILL.md.
Network
Links to these hosts (documentation or services it may open):
- img.shields.io
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names these keys or tokens, usually read from environment variables:
- API_KEY
- STRIPE_SECRET_KEY
- NEXT_PUBLIC_API_KEY
- NEXT_PUBLIC_STRIPE_SECRET
- NEW_API_KEY
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Env Manager loads about 3.9k tokens when it runs, and up to ~19k if it reads all its reference files. Until then it costs about 32 tokens; SKILL.md has 1,099 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~32
When it runs · the whole SKILL.md, loaded when a task matches: ~3.9k
With references · SKILL.md plus every file in references/, read only if the agent opens them: ~19k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check: notes

The automated check noted patterns worth knowing about, such as sudo or a known installer.

NoteMentions a .env fileSKILL.md:41

- Inconsistent .env files across team members

NoteMentions a .env fileSKILL.md:58
```
# 1. Validate your .env file
```
NoteMentions a .env fileSKILL.md:59
```
python3 scripts/validate_env.py .env
```

NoteMentions a .env fileSKILL.md:62

python3 scripts/validate_env.py .env --framework nextjs

NoteMentions a .env fileSKILL.md:65

python3 scripts/validate_env.py .env --compare-with .env.example

NoteMentions a .env fileSKILL.md:68

python3 scripts/validate_env.py .env --generate-example .env.example

NoteMentions a .env fileSKILL.md:71

python3 scripts/validate_env.py .env --json

NoteMentions a .env fileSKILL.md:80

Validate a .env file for structural issues:

NoteMentions a .env fileSKILL.md:83
```
python3 scripts/validate_env.py .env
```

NoteMentions a .env fileSKILL.md:108

python3 scripts/validate_env.py .env.local --framework nextjs

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 1,099 words (~3,935 tokens).

“Comprehensive environment variable validation, security scanning, and management for modern web applications.”

— opening of SKILL.md by bobmatnyc, Custom licence

name: env-manager
progressive_disclosure.references: frameworks.md, security.md, synchronization.md, troubleshooting.md, validation.md

Outline of SKILL.md

Environment Variable Manager (env-manager)
Overview
Why Use env-manager?
Quick Start
Installation
5-Minute Quick Start
Usage Examples
Basic Validation
Framework-Specific Validation
Comparing with .env.example
Generating .env.example
CI/CD Integration
Strict Mode
Quiet Mode
Supported Frameworks
CLI Reference
Command Structure
Options
Exit Codes
Common Use Cases
Scenario 1: New Developer Onboarding
Scenario 2: Pre-Deployment Check
Scenario 3: Security Audit
Scenario 4: Team Documentation
Scenario 5: CI/CD Quality Gate
Performance
Security Notes
Common Issues
"Missing equals sign" error
"Duplicate key" error

Read the full SKILL.md on GitHub

Files

SKILL.md and 8 other files (references) in plugin/skills/universal-infrastructure-env-manager of bobmatnyc/claude-mpm.

SKILL.md
.etag_cache.json
metadata.json
references/.etag_cache.json
references/frameworks.md
references/security.md
references/synchronization.md
references/troubleshooting.md
references/validation.md

Open the folder on GitHubat commit 25203d3

Compare with similar skills

Env Manager next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Env Manager compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Env Manager this skillbobmatnyc/claude-mpm	155	—	~3.9k	Automated safety check: Notes	Custom licence	1 mo ago
Arkenvyamcodes/arkenv	145	—	~2.5k	Automated safety check: Pass	MIT	today
Convex Self Hostingwaynesutton/markdown-site	628	—	~1.4k	Automated safety check: Pass	MIT	4 mo ago
Add React Analyticsgotempsh/temps	826	—	~2.7k	Automated safety check: Pass	Apache-2.0	today
Docker Containerizationailabs-393/ai-labs-claude-skills	454	—	~2.1k	Automated safety check: Notes	MIT	11 mo ago
Fullstack DevHHU3637kr/skills	145	3 repos	~8.6k	Automated safety check: Notes	MIT	15 days ago

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Questions about Env Manager

What does Env Manager do?

Environment variable validation, security scanning, and management for Next.js, Vite, React, and Node.js applications. Env Manager is an agent skill from bobmatnyc/claude-mpm.

When should I use Env Manager?

Env Manager fits situations like: tasks that involve Secrets management.

How do I install Env Manager in Claude Code?

Run `npx skills add bobmatnyc/claude-mpm --skill env-manager -a claude-code`. Or copy the skill folder (plugin/skills/universal-infrastructure-env-manager in bobmatnyc/claude-mpm) into .claude/skills/env-manager in your project. Claude Code loads it when a task matches its description.

How do I install Env Manager in Codex?

Run `npx skills add bobmatnyc/claude-mpm --skill env-manager -a codex`. Or copy the skill folder (plugin/skills/universal-infrastructure-env-manager in bobmatnyc/claude-mpm) into .agents/skills/env-manager in your project. Codex loads it when a task matches its description.

Can I use Env Manager in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add bobmatnyc/claude-mpm --skill env-manager -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/env-manager, .gemini/skills/env-manager, .github/skills/env-manager and .opencode/skills/env-manager in your project.

What does Env Manager need to run?

Going by SKILL.md and its folder, Env Manager needs the command-line tools its instructions call (python3, git and make) and credentials named API_KEY, STRIPE_SECRET_KEY, NEXT_PUBLIC_API_KEY and NEXT_PUBLIC_STRIPE_SECRET. Our summary lists: Python 3; Node.js; A credential in NEXT_PUBLIC_API_KEY; A credential in STRIPE_SECRET_KEY.

Does Env Manager access the network?

SKILL.md names 1 domain. As links in the text: img.shields.io. This is read from the text; nothing was executed.

Is Env Manager safe to install?

Our automated static check of SKILL.md found notes only (mentions a .env file), nothing it rates as a warning. It is not a guarantee. Review the folder before installing.

What licence does Env Manager use?

Env Manager has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.

How many tokens does Env Manager use?

About 3.9k tokens (SKILL.md is roughly 16k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 15k tokens, read only when the agent opens those files.

What are the alternatives to Env Manager?

Skills that share tags, products or a category with Env Manager: Arkenv (yamcodes/arkenv, 145 stars), Convex Self Hosting (waynesutton/markdown-site, 628 stars), Add React Analytics (gotempsh/temps, 826 stars) and Docker Containerization (ailabs-393/ai-labs-claude-skills, 454 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Env Manager?

bobmatnyc (a GitHub user) maintains it in bobmatnyc/claude-mpm, which has 155 GitHub stars. The repository holds 52 skills in this directory. The repository was last updated on August 31, 2026.

Source: bobmatnyc/claude-mpm on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Env Manager

Install Env Manager

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Files

Compare with similar skills

Similar skills

Arkenv

Convex Self Hosting

Add React Analytics

Docker Containerization

Fullstack Dev

Deploy To Temps

More from bobmatnyc/claude-mpm

Build MCP Server

Env Manager

Session Analyzer

Software Patterns

Verification Before Completion

Dependency Audit

Questions about Env Manager

Install Env Manager

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Files

Compare with similar skills

Similar skills

More from bobmatnyc/claude-mpm

Related

Questions about Env Manager