OpenCode

Support: detection (beta).

Install

Run OpenFiles: Install Agent Hooks… and pick OpenCode. OpenFiles creates .opencode/plugins/openfiles.js. The plugin listens for file.edited events and passes each path to the hook script:

// openfiles-hook: added by the OpenFiles VS Code extension. Delete this file to remove it.
import { spawn } from "node:child_process";

export const OpenFiles = async ({ directory }) => ({
  event: async ({ event }) => {
    if (event.type !== "file.edited") return;
    const file = event.properties?.file;
    if (!file) return;
    const child = spawn("node", ["/Users/you/.openfiles/hook.js", "--agent", "opencode", "--no-feedback"], {
      stdio: ["pipe", "ignore", "ignore"],
    });
    child.on("error", () => {});
    child.stdin.end(JSON.stringify({ tool_name: "edit", file_path: file, cwd: directory }));
  },
});

OpenCode plugins can’t add text to the model’s context from this event, so add the AGENTS.md section to have OpenCode read .openfiles/diagnostics.json.

Reference: OpenCode plugins.