Berget Auth Plugin for OpenCode

Authenticate OpenCode with your Berget AI account.

Works with OpenCode V2 and V1 from one package (@bergetai/opencode-auth ≥ 1.2):

• V2 (@opencode/cli ≥ 2.0) — configure under "plugins"
• V1 (opencode-ai ≥ 1.3.4) — configure under "plugin"

Quick Start

The recommended way to get started is with the Berget CLI:

npm install -g berget
berget code init
opencode
# Type /connect → choose your auth method

Manual setup

// OpenCode V2 — opencode.json
{
  "$schema": "https://opencode.ai/config.json",
  "plugins": ["@bergetai/opencode-auth@latest"],
}

// OpenCode V1 — opencode.json
{
  "$schema": "https://opencode.ai/config.json",
  "plugin": ["@bergetai/opencode-auth@latest"],
}

Authentication Methods

Berget Code Seat — Magic link

For team members with a Berget Code seat, on machines with a browser:

1. Run /connect in OpenCode
2. Select "Berget Code Seat - Login using this device"
3. The login page opens in your browser — token refresh is automatic

Berget Code Seat — Login using other device with QR

For headless environments (SSH, CI, containers) where the browser cannot open on the same machine:

1. Run /connect in OpenCode
2. Select "Berget Code Seat - Login using other device with QR"
3. Scan the QR code with your phone, or open the link shown in the dialog — the sign-in code is already included in it
4. Approve the sign-in on the other device; OpenCode continues automatically

The sign-in is valid for 10 minutes. If it times out, just run /connect again.

API Key

For API key users:

1. Run /connect in OpenCode
2. Select "Berget API Key - Enter API key manually"
3. Paste your key — persisted across sessions

Version Compatibility

OpenCode CLI	Plugin version	Config key
@opencode/cli (V2)	@bergetai/opencode-auth 1.2.x	plugins
opencode-ai ≥ 1.3.4	@bergetai/opencode-auth 1.2.x	plugin
opencode-ai < 1.3.4	pin @bergetai/opencode-auth@1.1.1	plugin

OpenCode V1 CLIs older than 1.3.4 cannot load object-form default exports; on those versions the plugin fails to load with a visible error. Pin the exact version @bergetai/opencode-auth@1.1.1 to keep using it on older V1 releases — the @1 dist-tag now resolves to the 1.2.x line, which requires V1 ≥ 1.3.4.

Coming from OpenCode V1 on V2?

Your V1 login carries over: on startup the plugin imports the berget credential from V1's auth.json into V2's credential store when OpenCode exposes the import surface (V2 2.0.22 does not yet — see docs/auth.md; until then, log in once via /connect). Once imported, token refresh is handled by the framework; refreshes made while on V2 are not written back to V1's store, so a long V2 session may require one re-login if you later downgrade to 1.1.x.

How It Works

• PKCE Authorization Flow for browser login (magic link)
• Device Authorization Grant (RFC 8628) for QR / device code login on headless machines
• Automatic token refresh — V1 uses a custom fetch; V2 delegates to the framework's credential store (see docs/auth.md)
• Models fetched dynamically from Berget API — no manual config needed

License

MIT