Env Doctor Free

What it does

When your agent uses it

• The user says why wont this run
• Check my environment
• Diagnose startup issue
• It works on my machine

Example prompts

• “why won”
• “check my environment”
• “env doctor”
• “/env-doctor-free”

Requirements

• Python 3
• Node.js
• Docker

Workflow steps

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

1. 1Detect project type from files
2. 2Check runtime availability and versions
3. 3Check dependencies
4. 4Check common port conflicts for 3000, 3001, 5000, 8000, and 8080.
5. 5Validate environment variables
6. 6Check file permissions
7. 7Check background services when the project appears to need them

What it can do on your machine

Read from SKILL.md and the folder at commit 44923f3. 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:

  • npm
  • go
  • docker
  • node
  • python
  • python3

  From the folder's file list and the shell code blocks in SKILL.md.

• Network

  No URLs in SKILL.md. Its commands use npm and docker, which can reach the network depending on how they are called.

  From URLs in SKILL.md, links to its own repository left out.

• Credentials

  Names no API keys, tokens, secrets or passwords.

  From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Env Doctor Free loads about 1.5k tokens when it runs, and up to ~4k if it reads all its reference files. Until then it costs about 93 tokens; SKILL.md has 637 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~93

When it runs · the whole SKILL.md, loaded when a task matches

~1.5k

With references · SKILL.md plus every file in references/, read only if the agent opens them

~4k

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

• NoteMentions a .env fileSKILL.md:3

  ncies, runtime versions, port conflicts, .env problems, file permissions, or stopped services.

• NoteMentions a .env fileSKILL.md:45

  - Compare `.env.example` against `.env` when both or either exist.

• NoteMentions a .env fileSKILL.md:46

  - Flag missing `.env` if `.env.example` exists.

• NoteMentions a .env fileSKILL.md:48

  rs in `.env.example` but is absent from `.env`.

• NoteMentions a .env fileSKILL.md:51

  ot use raw-display commands such as `cat .env`, `Get-Content .env`, or unredacted `grep` output.

• NoteMentions a .env fileSKILL.md:64

  a checklist, or when framework-specific `.env` validation is needed for Express, Django, Gin, or Flask. Read `references

• NoteMentions a .env fileSKILL.md:87

  Go/Docker runtimes, dependencies, ports, .env key presence, permissions, services. No .env values were displayed or reta

• NoteMentions a .env fileSKILL.md:96

  - Missing `DATABASE_URL` in `.env`, when required by `.env.example`, must be reported as a high-priority environment var

• NoteMentions a .env fileSKILL.md:97

  - `.env` findings and evidence must contain key names and empty/present state only, never values.

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

The full file from aiskillstore/marketplace at commit 44923f3, republished under its MIT licence (© aiskillstore). 637 words, ~1,509 tokens.

name

env-doctor-free

description

Diagnose local project environment issues that prevent apps from starting or running. Use when the user says "why won't this run", "check my environment", "env doctor", "diagnose startup issue", "it works on my machine", or asks for help debugging missing dependencies, runtime versions, port conflicts, .env problems, file permissions, or stopped services.

license

MIT

metadata.version

1.3.0

metadata.author

JustHandled Labs

metadata.triggers

why won't this run, check my environment, env doctor, diagnose startup issue, it works on my machine

**Env Doctor Findings**

1. [High] <issue>
   Evidence: `<command output or file reference>`
   Fix:
   <Use a `powershell` code fence on Windows or a `bash` code fence on macOS/Linux. Include only the matching OS command.>

2. [Medium] <issue>
   Evidence: `<command output or file reference>`
   Fix:
   <Use a `powershell` code fence on Windows or a `bash` code fence on macOS/Linux. Include only the matching OS command.>

**Likely Start Command**
`<command>`

**What I Checked**
Node/Python/Go/Docker runtimes, dependencies, ports, .env key presence, permissions, services. No .env values were displayed or retained.

© aiskillstore, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 3 other files (references) in skills/justhandledlabs/env-doctor-free of aiskillstore/marketplace.

• SKILL.md
• references/checks.md
• references/safety-fixtures.md
• skill-report.json

Open the folder on GitHubat commit 44923f3