Advisor

An opencode plugin that gives the agent a second opinion.

It registers one tool, advisor, which the agent calls to consult a separate, user-chosen model before acting. The advisor model has read-only tools (read/grep/glob/webfetch) — it can look things up, but it can never edit files, run commands, or spawn subtasks.

It also registers a /advise [question] slash command (via the plugin's config hook — no separate command file needed) so you can trigger it explicitly at any time.

When the agent calls it

• The change is big, risky, hard to reverse, or involves many blocking/destructive operations.
• Exploration is done and it has a concrete solution but wants feedback before implementing.
• You explicitly ask it to get advice, a second opinion, or check its approach.

Install

Add the plugin to your opencode config (global ~/.config/opencode/opencode.json or a project's opencode.json):

{
  "plugin": ["opencode-plugin-advisor"]
}

Or, while developing locally, point at the file directly:

{
  "plugin": ["file:///absolute/path/to/advisor/index.ts"]
}

Restart opencode after changing config.

Configure the advisor model

Copy advisor.example.json to advisor.json and set the model you want to consult. The plugin looks in, in order:

1. <project>/advisor.json
2. ~/.config/opencode/advisor.json

{
  "model": "anthropic/claude-fable-5"
}

Optional fields:

• system — override the default advisor system prompt.
• tools — override the default tool permissions ({ "write": false, ... }).

Development

bun install
bunx tsc --noEmit