fix: use 'opencode run' instead of bare prompt for OpenCode client

tools/ai-cli-dispatch/src/execute.ts

@@ -8,7 +8,7 @@ import { ClientNotFoundError, ExecError } from "./types.js";
 const CLIENT_ARGS: Record<ClientName, (prompt: string) => string[]> = {
   codex: (p) => ["exec", p],
   claude: (p) => ["-p", p],
-  opencode: (p) => [p],
+  opencode: (p) => ["run", p],
 };
 
 export interface ExecuteOptions {

tools/ai-cli-dispatch/tests/execute.test.ts

@@ -108,7 +108,7 @@ describe("executePrompt", () => {
 
   it("returns non-zero exit code without throwing", async () => {
     const scenarios = new Map<string, MockScenario>([
-      ["opencode fail", { stdout: "", stderr: "error\n", exitCode: 1 }],
+      ["opencode run fail", { stdout: "", stderr: "error\n", exitCode: 1 }],
     ]);
     const result = await executePrompt("opencode", "fail", {
       spawn: mockSpawn(scenarios),