Your .env.example is a contract. Nobody reads contracts.

Every team has one: a .env.example that was accurate for about two weeks. Since then, machines have drifted — a teammate added REDIS_URL on their laptop and never documented it, staging runs with an undocumented STRIPE_SECRET_KEY, and CI passes because nobody checks. Then a deploy fails at 2am because prod never got QUEUE_CONCURRENCY, and everyone diffing .env files by hand.

envdrift compares .env.example against live .env files — in one directory or across a whole tree of projects and machines — and tells you exactly what's missing, what's extra, and which undocumented variables look like secrets. It exits non-zero when drift exists, so your CI can be the adult in the room.

• Zero dependencies. One Node 18+ binary, nothing installed alongside it.
• Never prints variable values — only names and verdicts (safe for logs).
• scan walks monorepos and machine checkouts, finding every env pair.
• Secret heuristics flag undocumented vars shaped like keys, tokens, PEMs, and connection strings with embedded credentials.
• --ci gate mode: green pipeline or a hard stop, your choice.

npm install -g envdrift-cli

Or run it without installing:

npx envdrift-cli check

# In any project with .env + .env.example:
$ envdrift check

✗ drifted  .
  missing (in .env.example, not in .env):
    - FEATURE_FLAGS
    - LOG_LEVEL
  extra (in .env, not documented):
    + STRIPE_SECRET_KEY [secret-like]
  → 2 missing vars, 1 extra var, 1 secret-like var present

Audit every project under a directory (a laptop, a server checkout, a monorepo):

$ envdrift scan --dir ~/code

Make it a CI gate:

$ envdrift scan --ci   # exit code 1 if anything drifted or is incomplete

Machine-readable output for scripts:

$ envdrift check --format json

envdrift works with zero config. Drop an envdrift.config.json in a project to customize it:

{
  "files": {
    "env": ".env",
    "example": ".env.example"
  },
  "ignore": ["NODE_ENV", "DEBUG"],
  "scan": { "maxDepth": 4 }
}

You can also ignore vars per-run: --ignore NODE_ENV,DEBUG.

EnvDrift Pro ($9/month) adds the team layer the free CLI deliberately doesn't have: a hosted drift dashboard across all your machines and servers, scheduled audits with Slack/email alerts when a machine starts drifting, secret-name allowlists shared across your org, and historical reports so you can see who documented what, when. The CLI stays free and local-first forever; Pro is for teams who want drift caught before the 2am deploy, not after.

License via Gumroad — link placeholder.

npm test        # node:test suite, no dependencies to install
npm start       # run the CLI from source

MIT — see LICENSE.

Part of the stealth-alpha toolkit — eight zero-dependency CLIs for release automation, agent security, and repo hygiene.