Muse Auth

Use Meta Muse Spark in opencode billed to your Muse Code monthly subscription — no pay-as-you-go API key, no third-party CLI.

Install

// opencode.json
{
  "$schema": "https://opencode.ai/config.json",
  "plugin": ["opencode-muse-auth"]
}

Then run /connect in opencode, pick the meta provider and the Muse Code subscription method: it shows a Meta device page URL and a code. Enter the code in your browser (your own Meta account) and the login completes by itself.

Verified end-to-end against the published package: isolated project with only "plugin": ["opencode-muse-auth"], live chat on meta/muse-spark-1.3 billed to subscription.

Requirements

• opencode with plugin support
• A Meta account with an active Muse Code subscription

How it works

The plugin registers an auth hook for the built-in meta provider (Routes through the Responses API, meta.txt system prompt applies automatically to muse-* model ids):

• Login — Meta device-code exchange (RFC 8628) inside /connect, then mints the stable account-bound inference key via the Model API. The key is cached locally (~/.config/opencode/muse-code-sub.json, owner-only permissions where supported) and never printed. The cache stores exactly apiKey, accountId, and email — the OAuth access token from the login flow is kept in memory only and never written to disk.
• Runtime — an auth loader injects the cached key on every startup. The mint endpoint is aggressively rate-limited, so the plugin never re-mints on its own; re-run /connect only if access is revoked (401).

Flow parameters are compatible with the published behavior of oh-my-pi (MIT); see NOTICE.

Development

npm install
npm run build
npm test

License

MIT — see LICENSE.