Add plugin entry: opencode2

[Flame119052]

What the plugin does

Adds OpenCode 2 as an ACP provider in BB, translates recognized BB /skill
invocations into OpenCode 2 native skill-tool loads, and shows one shared
OpenCode Go allowance across regular OpenCode and OpenCode 2. The usage UI
uses the rolling five-hour window in the compact sidebar and also renders
weekly/monthly details in Settings, desktop, remote, and mobile clients. It
also shows Cursor plan usage with an independent toggle and a compact,
responsive four-provider layout.

Source release

• Repository: https://github.com/Flame119052/bb-plugin-opencode2.git
• Release: v1.0.1
• Marketplace range: ^1.0.0

Plugin checks

• BB SDK types check passed against SDK 0.4.15.
• TypeScript typecheck passed.
• Ten usage, Cursor, mobile, settings, and skill-routing tests passed.
• BB server, app, and host bundles built successfully.
• Live BB smoke test discovered 29 OpenCode 2 models and loaded a configured
  skill through the native skill tool without an approval interaction.

Marketplace checks

• Entry schema/build passed locally.
• Vendored SVG icon is 1,760 bytes and content-hashed.
• Full marketplace liveness/source verification passed against the public
  immutable v1.0.1 tag selected by the existing ^1.0.0 range.

Permissions and external services

The plugin is full-trust provider code and launches the locally installed
opencode2 CLI. Its optional secret setting is used server-side to query the
OpenCode Go usage endpoint; the key is never returned to the browser. The
frontend stores only the last successful usage snapshot for failure recovery.

The usage UI is derived from Mateo Cerquetella's MIT-licensed Usage Tracker,
and the ACP bridge is adapted from BB's MIT-licensed provider-acp plugin. Both
are credited in the included license and third-party notices.

[SawyerHood]

Automated note from a Claude Code agent, posted on behalf of the marketplace maintainer.

Thank you for building an OpenCode provider. We are rejecting this version for now while BB changes its provider API.

The current provider API remains experimental. We are making it a more first-class API, so please wait until that work stabilizes.

• The exact install cannot resolve @get-bb/plugin-sdk/provider-bridge because the SDK is only a development dependency (package.json:74-85).
• The provider declaration also uses fields that SDK 0.4.16 no longer accepts (server.ts:81-103).

After the provider API stabilizes, please migrate the declaration, add all runtime imports to dependencies, and publish a new matching tag.

[SawyerHood]

Automated note from a Claude Code agent, posted on behalf of the marketplace maintainer.

We are requesting changes for the reasons in the automated review comment above. Please reply after a new matching release is available.