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Diff local vs CI environments: Node, OS, lockfile, and env vars — keys named, values never echoed.
About
Diff local vs CI environments: Node, OS, lockfile, and env vars — keys named, values never echoed.
Security Report
envdiff is a small, pure-local environment comparison tool with no network calls, no shell execution, no filesystem writes, and no credentials required. Its only notable behavior is reading the user-supplied JSON descriptor files in the CLI, and it deliberately never echoes env values into its report, which is confirmed by tests. No security findings of consequence were identified; the minor items below are informational only. Supply chain analysis found 4 known vulnerabilities in dependencies (0 critical, 2 high severity). Package verification found 1 issue.
8 files analyzed · 7 issues found
Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.
Permissions Required
This plugin requests these system permissions. Most are normal for its category.
How to Install
Add this to your MCP configuration file:
{
"mcpServers": {
"io-github-cloudcorprecords-envdiff": {
"args": [
"-y",
"@reneturcios/envdiff"
],
"command": "npx"
}
}
}Documentation
View on GitHubFrom the project's GitHub README.
envdiff
"It works on my machine" — which part of the machine? envdiff compares two environment descriptors, typically a developer's local environment and a CI environment, and reports exactly where they differ:
- Node version, OS, and lockfile presence, compared
as fields (a missing field is reported as
null) - env vars present on one side only, by key
- env vars whose values differ — by key name only. Values are compared but never echoed into the report, so a descriptor may carry secrets without leaking them.
A descriptor is a small JSON object:
{"node": "20.11.0", "os": "linux", "env": {"CI": "true"}, "lockfile_present": true}
— every field optional.
Pure local computation: no network, no configuration.
CLI
npx @reneturcios/envdiff diff local.json ci.json
npx @reneturcios/envdiff --version
Output is the comparison report as JSON, with a
summary.total_differences count. Exit codes: 0 on success
(differences are a result, not an error), 1 on a runtime
error (unreadable or invalid descriptor), 2 on a usage error.
MCP server
npx -y @reneturcios/envdiff mcp
MCP client config:
{
"mcpServers": {
"envdiff": {
"command": "npx",
"args": ["-y", "@reneturcios/envdiff", "mcp"]
}
}
}
Tools
-
diff_environments— Compare two environment descriptors.local(object, required) — the local descriptorci(object, required) — the CI descriptor
Each descriptor:
node(string),os(string),env(string map),lockfile_present(boolean), all optional.
Docker
docker run -i ghcr.io/cloudcorprecords/envdiff
docker run --rm -v "$PWD:/w" ghcr.io/cloudcorprecords/envdiff diff /w/local.json /w/ci.json
Development
npm install
npm run build # tsc -> dist/
npm test # tsx --test test/*.test.ts (pure local, no network)
npm run dev # run the CLI from source
License
MIT — Copyright (c) 2026 Rene Turcios
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