opencode creating plugins and exposing it via opencode command line

 Let's create a plugin that you can call from opencode command interface for example by typing

 /custom-plugin 

to get opencode to execute your plugin. To do that, we need to create a plugin and then create command that goes into opencode.json

The plugin 

The plugin code - you need to create a folder ".opencode/plugins/custom-tools.ts". 

import { type Plugin, tool } from "@opencode-ai/plugin"

export const CustomToolsPlugin: Plugin = async (ctx) => {
  return {
    tool: {
      mymagictool: tool({
        description: "This is a custom tool",
        args: {
          foo: tool.schema.string(),
        },
        async execute(args, context) {
          const { directory, worktree } = context
          return `Hello ${args.foo} from ${directory} (worktree: ${worktree})`
        },
      }),
    },
  }
}  

With this you would have a plugin defined. You also need to inherit from Plugin (this is the proper) one and so opencode would know about it. 

If you restart opencode and go to /status - you will be able to see your plugin 


Command 

Next, we will wire up our command and this could look like this. 

{
  "$schema": "https://opencode.ai/config.json", 
  "command": {
    "custom-plugin": {
      "template": "Use the CustomToolsPlugin with the argument foo: $ARGUMENTS",
      "description": "Run the custom mytool plugin"
    }
  },
  "plugin": ["superpowers@git+https://github.com/obra/superpowers.git", "opencode-devcontainers", "./plugins/my-plugin.ts"]
}

And then you can call it here 


And then fire away. 








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