feat: add opencode local adapter support

packages/adapters/opencode-local/src/cli/format-event.ts

@@ -0,0 +1,114 @@
+import pc from "picocolors";
+
+function asRecord(value: unknown): Record<string, unknown> | null {
+  if (typeof value !== "object" || value === null || Array.isArray(value)) return null;
+  return value as Record<string, unknown>;
+}
+
+function asString(value: unknown, fallback = ""): string {
+  return typeof value === "string" ? value : fallback;
+}
+
+function asNumber(value: unknown, fallback = 0): number {
+  return typeof value === "number" && Number.isFinite(value) ? value : fallback;
+}
+
+function printToolEvent(part: Record<string, unknown>): void {
+  const tool = asString(part.tool, "tool");
+  const callId = asString(part.callID, asString(part.id, ""));
+  const state = asRecord(part.state);
+  const status = asString(state?.status);
+  const input = state?.input;
+  const output = asString(state?.output).replace(/\s+$/, "");
+  const metadata = asRecord(state?.metadata);
+  const exit = asNumber(metadata?.exit, NaN);
+  const isError =
+    status === "failed" ||
+    status === "error" ||
+    status === "cancelled" ||
+    (Number.isFinite(exit) && exit !== 0);
+
+  console.log(pc.yellow(`tool_call: ${tool}${callId ? ` (${callId})` : ""}`));
+  if (input !== undefined) {
+    try {
+      console.log(pc.gray(JSON.stringify(input, null, 2)));
+    } catch {
+      console.log(pc.gray(String(input)));
+    }
+  }
+
+  if (status || output) {
+    const summary = [
+      "tool_result",
+      status ? `status=${status}` : "",
+      Number.isFinite(exit) ? `exit=${exit}` : "",
+    ]
+      .filter(Boolean)
+      .join(" ");
+    console.log((isError ? pc.red : pc.cyan)(summary));
+    if (output) {
+      console.log((isError ? pc.red : pc.gray)(output));
+    }
+  }
+}
+
+export function printOpenCodeStreamEvent(raw: string, _debug: boolean): void {
+  const line = raw.trim();
+  if (!line) return;
+
+  let parsed: Record<string, unknown> | null = null;
+  try {
+    parsed = JSON.parse(line) as Record<string, unknown>;
+  } catch {
+    console.log(line);
+    return;
+  }
+
+  const type = asString(parsed.type);
+
+  if (type === "step_start") {
+    const sessionId = asString(parsed.sessionID);
+    console.log(pc.blue(`step started${sessionId ? ` (session: ${sessionId})` : ""}`));
+    return;
+  }
+
+  if (type === "text") {
+    const part = asRecord(parsed.part);
+    const text = asString(part?.text);
+    if (text) console.log(pc.green(`assistant: ${text}`));
+    return;
+  }
+
+  if (type === "tool_use") {
+    const part = asRecord(parsed.part);
+    if (part) {
+      printToolEvent(part);
+    } else {
+      console.log(pc.yellow("tool_use"));
+    }
+    return;
+  }
+
+  if (type === "step_finish") {
+    const part = asRecord(parsed.part);
+    const tokens = asRecord(part?.tokens);
+    const cache = asRecord(tokens?.cache);
+    const reason = asString(part?.reason, "step_finish");
+    const input = asNumber(tokens?.input);
+    const output = asNumber(tokens?.output);
+    const cached = asNumber(cache?.read);
+    const cost = asNumber(part?.cost);
+    console.log(pc.blue(`step finished: reason=${reason}`));
+    console.log(pc.blue(`tokens: in=${input} out=${output} cached=${cached} cost=$${cost.toFixed(6)}`));
+    return;
+  }
+
+  if (type === "error") {
+    const part = asRecord(parsed.part);
+    const message = asString(parsed.message) || asString(part?.message) || line;
+    console.log(pc.red(`error: ${message}`));
+    return;
+  }
+
+  console.log(line);
+}

packages/adapters/opencode-local/src/cli/index.ts

@@ -0,0 +1 @@
+export { printOpenCodeStreamEvent } from "./format-event.js";