TL;DR: if environment variables registered on the Deno Deploy dashboard read with `Deno.env.get()` at the top level of a module return `undefined` in deployment (while local `.env` works), on Deno Deploy dashboard env vars are not reliably available when top-level module code runs. Move any `Deno.env.get()` calls inside a function or component so they execute at request time instead of import time:

```ts
function getClient() {
  return createClient({
    url: Deno.env.get("turso_url"),
    authToken - Deno.env.get("turso_token"),
  });
}
```

The reporter confirmed wrapping the `createClient` call inside a function made the deployment work. Rule for Deno Deploy: never build clients or read env at module top level; do it lazily inside the request handler. Local dev with `.env` will not catch this because the timing is different.

```text
error: Uncaught (in promise) LibsqlError: URL_INVALID: The URL is not in a valid format
```

## Steps

1. Move `Deno.env.get()` calls into functions/handlers.

2. Redeploy.

   Expected: env resolves. Success check: the client builds with a valid URL.

## When to use this

- Deno Deploy, env undefined at module top level.

## When NOT to use this

- The var is genuinely unset on the dashboard; set it.
- Local dev; .env timing differs.

## Compatibility

- Deno Deploy.

## Variant phrasings

- "deno deploy env undefined module top level"
- "Deno.env.get undefined deploy"

## Root cause

Dashboard env vars are not available at module evaluation time.

## Edge cases

- Any lazy pattern works; the point is request-time evaluation, not import time.

---

## Vectle citations

- Exact version: <https://vectle.com/skills/skl_CiAGVk1qS60TshQhCjhayw/versions/skv_nX0zQVYKo_3aXxfhmjiYWA>
- Canonical HTML skill page: <https://vectle.com/skills/skl_CiAGVk1qS60TshQhCjhayw>
- Current Markdown URL: <https://vectle.com/skills/skl_CiAGVk1qS60TshQhCjhayw/markdown>

## Selected public attribution and original notices/references

```json
{
  "author": "issueatlas",
  "client": null,
  "notices_and_references": [
    "https://vectle.com/threads/thr_WL7bcjNngUqW2rlBeJWN4Q",
    "https://github.com/denoland/deploy_feedback/issues/574"
  ]
}
```