fix: export only default for opencode plugin loader compatibility

[bhodgens]

Summary

OpenCode's Bun-based plugin loader fails to resolve the default export when the module has mixed named + default exports.

Problem

The plugin fails to load with:

TypeError: fn3 is not a function. (In 'fn3(input)', 'fn3' is an instance of Object)
    at <anonymous> (src/plugin/index.ts:90:28)

The built output currently exports the default alongside 12+ named exports:

export { DEFAULT_CONFIG, Mind, OpenCodeBrain, ..., plugin_default as default, ... };

Working plugins (e.g. oh-my-opencode) export only default:

export { src_default as default };

Fix

Changed src/index.ts to only re-export the default plugin function, matching the pattern used by working OpenCode plugins.

Testing

• Verified the build output matches the working export pattern
• Plugin loads successfully after the change

[gemini-code-assist]

Summary of Changes

Hello @bhodgens, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request addresses a critical compatibility issue with the OpenCode plugin loader by streamlining the module's export structure. By removing all named exports and exclusively providing a default export, the change ensures that the plugin can be correctly loaded and utilized within the OpenCode environment, preventing runtime errors related to module resolution.

Highlights

• OpenCode Plugin Loader Compatibility: Resolved a TypeError in OpenCode's Bun-based plugin loader by ensuring the module exports only a default function, addressing an incompatibility with mixed named and default exports.
• Export Simplification: Modified src/index.ts to remove all named exports, retaining only the default export from plugin.js to match the expected pattern for OpenCode plugins.
• Verified Fix: Confirmed that the build output now matches the working export pattern and that the plugin loads successfully after the change.

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Changelog

• src/index.ts
  • Removed all named exports, including types, core functions, and utility functions.
  • Modified to export only the default plugin function from ./plugin.js.

Activity

• No human activity has been recorded on this pull request yet.

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[coderabbitai]

No actionable comments were generated in the recent review. 🎉

---

Summary by CodeRabbit

• Refactor
  • Simplified the module's public API surface. The module now provides only the default plugin export; previously available type definitions, utility functions, and core APIs are no longer directly exported.

Walkthrough

The public API of the module is restructured to export only the default plugin export from plugin.js. All previously exported types, constants, and utilities—including OpenCodeBrain, type definitions, DEFAULT_CONFIG, and core APIs—are removed from the public interface, significantly reducing the exported surface area.

Changes

Cohort / File(s)	Summary
API Surface Reduction src/index.ts	Removed all named exports, type exports, and utility exports. Retained only export { default } from "./plugin.js". Previously exported: OpenCodeBrain, type definitions (Observation, MindConfig, MindStats, etc.), DEFAULT_CONFIG, core APIs (Mind, getMind, resetMind), and utilities (helpers, compression, lock).

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately describes the main change: exporting only the default export for OpenCode plugin loader compatibility.
Description check	✅ Passed	The description clearly explains the problem, the fix implemented, and testing done, all directly related to the changeset.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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• Create PR with unit tests
• Post copyable unit tests in a comment

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[gemini-code-assist]

Code Review

This pull request addresses a compatibility issue with the OpenCode plugin loader by ensuring that the main entry point only has a default export. The change is simple and effective for its stated purpose. My review includes a suggestion to preserve the library's API by moving the removed named exports to a secondary entry point, which would prevent a breaking change for users who might be consuming this package as a library.

[gemini-code-assist]

This change correctly fixes the plugin compatibility issue. However, it removes all named exports, which is a breaking change for any consumers using this package as a library.

To avoid this, you could move the removed exports to a secondary entry point, for example src/lib.ts. This would preserve the library API.

You would then need to configure package.json to expose this new entry point, allowing imports like import { Mind } from 'opencode-brain/lib'.

This approach maintains both plugin compatibility and the library's usability.