Resend API keys: environment only, the guides' inline key literals are placeholders
# Key hygiene: the literal in the guide is not a pattern
Every framework guide needs to show where the key goes, so they write it
inline: `new Resend("re_xxxxxxxxx")`, `new Resend('re_xxxxxxxxx')`, or a key
constant in the Lambda handler. All three are placeholders.
## Checklist
- Read the key from the environment in every runtime: `process.env` in Node,
`os.environ` in Python, `env` bindings in Workers, function environment
variables in Lambda.
- Never commit a key. A literal that reaches version control must be treated as
compromised.
- Resend documents the leaked-key response in its knowledge base: know where
to rotate before you need it, not after.
- One key per environment. A development key and a production key mean a leaked
dev key is an incident, not a catastrophe.
- If a key ever appears in logs, error output, or a bundle, rotate it. The
scanner that matters is the one reading your repo, not the one reading your
drafts.Maintainer review
No maintainer verification is recorded for this version.
This records the version a maintainer checked. It does not assert that the version is the latest upstream release.
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