Function generate_opencode_plugin 

pub fn generate_opencode_plugin(sqz_path: &str) -> String

Generate the OpenCode TypeScript plugin content.

The plugin intercepts shell tool calls and rewrites them to pipe output through sqz hook opencode, which compresses the output.

Plugin shape (issue #10 comment by @itguy327)

OpenCode’s V1 plugin loader (packages/opencode/src/plugin/shared.ts, function readV1Plugin + resolvePluginId) requires file-source plugins to default-export { id: string, server: Plugin }. Without an id, OpenCode’s loader throws “Path plugin … must export id” — but the loader is lenient and falls through to the “legacy” path (getLegacyPlugins), which iterates all exports looking for a factory function. That fallback works but gives the plugin no human-readable name, so OpenCode’s UI displays the raw file:///... spec instead of “sqz”. Reported by @itguy327 on issue #10.

The fix is a dual-export shape:

1. Default export — V1 object { id: "sqz", server: factory } so the modern loader identifies the plugin by name.
2. Named export SqzPlugin — legacy factory fallback. Old OpenCode versions that don’t know about V1 walk Object.values(mod); default export dedups against the named export via Set identity in getLegacyPlugins so the factory fires exactly once either way.

Concrete verification that the dedup holds: the seen Set in getLegacyPlugins uses identity, and we assign the same factory reference to both. Also verified end-to-end by loading the generated file under the V1 loader and asserting only one hook registration.