.env.example Is a Manifest — The Pattern Most Devs Skip
Your .env.example already lists every one of your 15 API keys. Treat it as a manifest and a tool can mint each scoped key for you, value-free, in one command.
Rocco read your .env.example like a grocery list. Then he went and got everything on it.
🦝 Rocco: you already wrote the list. i just did the shopping.
Your .env.example is already a manifest — a complete, ordered list of every credential your project needs. Ringtail Keys is a local, open-source, agent-led tool that reads .env.example as that manifest and mints each scoped API key from the providers' official APIs, value-free, writing the results to .env.local and Infisical. The secret values never touch your coding agent or any model.
What does it mean to treat .env.example as a manifest?
A manifest is a declared list of what a system needs. Your .env.example already is one: every RESEND_API_KEY, STRIPE_SECRET_KEY, and DATABASE_URL is a line item declaring a dependency. Most developers treat that file as a passive comment — a reminder to go fill things in by hand. The pattern most devs skip is treating it as executable intent: a list a tool can read and act on.
When .env.example is the source of truth, provisioning stops being a memory game. The file says what the project needs; a tool goes and gets exactly that, in order, correctly scoped. Nothing more, nothing missing.
🦝 Rocco: a comment you ignore, or a list somebody actually reads. same file. big difference.
Why is .env.example the right source of truth?
Because it already lives in your repo, it's already reviewed, and it's already the contract every teammate follows. The variable names are safe to commit (that's the whole point of the .example convention) while the values stay out of git. That split — public names, private values — is exactly the boundary a provisioning tool needs.
The Twelve-Factor App methodology has argued for years that config belongs in the environment, not the code. .env.example is the human-readable index of that config. Keeping it accurate is one of the highest-leverage habits in a codebase — and once it's accurate, it becomes machine-readable too.
How does Ringtail turn the manifest into real keys?
Ringtail reads each variable name in .env.example, maps it to a provider, and drives that provider's official API to mint a least-privilege key. It validates the scope on the spot — a key that works is kept, a dud is discarded — and writes the value straight to .env.local and Infisical across dev, staging, and prod. You approve one "allow" per provider the first time; after that it's zero-touch.
Install it and point it at a repo:
curl -fsSL ringtail.sh | sh
ringtail up
ringtail up starts the local daemon. Your coding agent (Claude Code, Cursor) then works the manifest top to bottom. The orchestration runs through the agent; the secret values are returned by each provider's API directly into your files, so the model only ever sees variable names and scopes.
What makes a good .env.example manifest?
The better your manifest, the cleaner the provisioning. A few habits pay off:
| Habit | Why it matters |
|---|---|
| One variable per real dependency | Each line maps to one provider + one scope |
| Clear, conventional names | STRIPE_SECRET_KEY, not KEY2 — names route to providers |
| Group by provider | Keeps the mint order legible and reviewable |
| Comment non-obvious scopes | A # read-only hint documents intent for humans and tools |
| Commit it, never the values | Public names, private values — the safe boundary |
Keep the file honest and it doubles as documentation and a provisioning script. Let it rot and every new clone starts with a scavenger hunt. For the full picture of that scavenger hunt, see how to stop juggling 15 API keys on every new project.
When should you use Ringtail? (and when not)
Use Ringtail when:
- You're starting a new project and don't want to re-extract the same keys by hand from 15 token pages.
- You want a coding agent to wire up infra without ever handling secret values.
- You need least-privilege, per-project keys instead of one over-scoped token reused everywhere.
- You want rotation that doesn't break production.
Don't reach for Ringtail when:
- You want a hosted vault that stores secrets behind a vendor login — Ringtail is a local acquisition tool, not a storage console.
- You need an enterprise compliance suite with governance and audit workflows.
- A provider has no key-minting API. Ringtail uses official APIs first; where one doesn't exist, it falls back to a guided flow where a human handles the login — never a bot acting with your credentials.
FAQ
What is a .env.example file?
A .env.example file is a committed template that lists every environment variable a project needs, with the names present but the secret values omitted or faked. It documents your configuration contract so anyone cloning the repo knows what to fill in. Because it holds names and not values, it's safe to keep in git — and it doubles as a manifest a provisioning tool can read.
How does Ringtail use .env.example?
Ringtail Keys reads .env.example as a manifest of everything your project needs, maps each variable to its provider, and mints a scoped key from that provider's official API. It validates the scope, then writes the value to .env.local and Infisical across dev, staging, and prod. The orchestration runs through your coding agent, but the secret values are returned straight into your files, value-free.
Should I commit .env.example to git?
Yes. .env.example contains only variable names and placeholder values, never real secrets, so it's designed to be committed. It gives teammates and tools a single source of truth for what the project needs. The real secrets belong in .env.local, which stays gitignored — see how to stop committing secrets to git.
Is Ringtail free and open source?
Yes. Ringtail Keys runs locally on your machine and the source is public, so you can read exactly what it does, fork it, and self-host it. There's no hosted vault holding your secrets behind a vendor login, because the keys live in your own .env.local and your own Infisical.