bring oc back

modules/_opencode/plugin/block-git.ts

@@ -0,0 +1,18 @@
+import type { Plugin } from "@opencode-ai/plugin";
+
+const GIT_PATTERN = /(?:^|[;&|]\s*|&&\s*|\|\|\s*|\$\(\s*|`\s*)git\s/;
+
+export const BlockGitPlugin: Plugin = async () => {
+	return {
+		"tool.execute.before": async (input, output) => {
+			if (input.tool === "bash") {
+				const command = output.args.command as string;
+				if (GIT_PATTERN.test(command)) {
+					throw new Error(
+						"This project uses jj, only use `jj` commands, not `git`.",
+					);
+				}
+			}
+		},
+	};
+};