Claude Code mod

env-doctor

Read-only preflight of a dev environment at session start: stopped compose services, missing node_modules for MCP servers, empty cache files and required paths. Never fixes anything, it only prints the command.

Context & usage mods Plugin marketplaceValidates on Claude Code 2.1.316 Source

Install

Inside Claude Code
/plugin marketplace add mercynet/my-claude-mods
/plugin install env-doctor@local-mods

Mods install like plugins. Run /reload-plugins or start a new session to load it.

What it can access

Reach
L2Writes or runs: runs processes, reads files, draws
Hooks
session.startcommand.run

From a static scan of the mod's code by awesome-claude-code-mods. It shows what the code asks for, not a security review.

How Claude Code mods work

  • A mod is a plugin with a JavaScript or TypeScript module that runs inside Claude Code (version 2.1.287 or later). It can draw panes beside the transcript, a band above the prompt, buttons and toasts, restyle the spinner and tool rows, and watch or rewrite tool calls and prompts.
  • It installs like any plugin: add its marketplace with /plugin marketplace add owner/repo, then /plugin install name@marketplace.
  • Check what a mod can reach before installing: it runs with your permissions. Reach goes from drawing only, to reading files, to writing files or running processes, to the network. Run claude plugin validate on a clone to list its hooks and calls without running it.
  • Turn one off from the Installed tab in /plugin, or start Claude Code with --safe-mode to skip every customization for a session.
Claude Code docs

Details

Repository
mercynet/my-claude-mods
Folder
env-doctor
Marketplace
local-mods
Author
Paulo Silva
Type
Context & usage mods
Last updated
9 October 2026
Listed in
awesome-claude-code-mods

FAQ

What is env-doctor?

Read-only preflight of a dev environment at session start: stopped compose services, missing node_modules for MCP servers, empty cache files and required paths. Never fixes anything, it only prints the command. It is a mod for Claude Code, from mercynet/my-claude-mods on GitHub.

What can the env-doctor mod access?

Its widest reach is "writes or runs" (runs processes, reads files, draws). Like any mod, it runs with your permissions.

How do I install env-doctor?

Inside Claude Code (v2.1.287 or later), run /plugin marketplace add mercynet/my-claude-mods and then /plugin install env-doctor@local-mods.

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