fix: plugin crashes on load — exports expose classes that OpenCode calls as functions

[Copilot]

OpenCode's plugin loader iterates all module exports and calls each as fn(input). Our "import" export pointed to dist/index.js which re-exports utility classes (DeltaTracker, StreamToSseConverter, etc.). OpenCode calls DeltaTracker(input) without new → TypeError. Separately, opencode auth login didn't show cursor because the plugin-toggle only matched "cursor-acp" in the plugin array, not the npm package name "@rama_nigg/open-cursor@latest".

Package exports

• "main" and exports["."] now resolve to dist/plugin-entry.js (single default export) instead of dist/index.js
• Full library API preserved under "./lib" subpath for programmatic consumers

Plugin toggle

• isCursorPluginEnabledInConfig now recognizes @rama_nigg/open-cursor with optional @version suffix, not just the legacy cursor-acp symlink name

// Both of these now work:
{ "plugin": ["cursor-acp"] }
{ "plugin": ["@rama_nigg/open-cursor@latest"] }

OpenCode loader reference

From anomalyco/opencode src/plugin/index.ts:

for (const [_name, fn] of Object.entries(mod)) {
  const init = await fn(input)  // calls every export as a plugin function
}

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• opencode.ai
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node /home/REDACTED/work/_temp/ghcca-node/node/bin/node --enable-source-maps /home/REDACTED/work/_temp/copilot-developer-action-main/dist/index.js (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Plugin non-functional</issue_title>
<issue_description>```
$ opencode
{
"name": "UnknownError",
"data": {
"message": "TypeError: Cannot call a class constructor DeltaTracker without |new|\n at DeltaTracker (unknown:1:11)\n at (src/plugin/index.ts:90:28)\n at processTicksAndRejections (native:7:39)"
}
}

I tried installing via npm, via the TUI installer, and simply by editing opencode.json. Results are the same.

opencode auth login also doesn't display cursor option.</issue_description>

<agent_instructions>Let's investigate and solve this one, it's very concerning, suggests latest commits had errors.</agent_instructions>

## Comments on the Issue (you are @copilot in this section)

<comments>
</comments>

• Fixes Plugin non-functional #34

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[Nomadcxx]

Closing in favor of PR #36 which contains the same fix.