Move adapter implementations into shared workspace packages

Extract claude-local and codex-local adapter code from cli/server/ui
into packages/adapters/ and packages/adapter-utils/. CLI, server, and
UI now import shared adapter logic instead of duplicating it. Removes
~1100 lines of duplicated code across packages. Register new packages
in pnpm workspace.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

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

@@ -0,0 +1,56 @@
+import pc from "picocolors";
+
+export function printCodexStreamEvent(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 = typeof parsed.type === "string" ? parsed.type : "";
+
+  if (type === "thread.started") {
+    const threadId = typeof parsed.thread_id === "string" ? parsed.thread_id : "";
+    console.log(pc.blue(`Codex thread started${threadId ? ` (session: ${threadId})` : ""}`));
+    return;
+  }
+
+  if (type === "item.completed") {
+    const item =
+      typeof parsed.item === "object" && parsed.item !== null && !Array.isArray(parsed.item)
+        ? (parsed.item as Record<string, unknown>)
+        : null;
+    if (item) {
+      const itemType = typeof item.type === "string" ? item.type : "";
+      if (itemType === "agent_message") {
+        const text = typeof item.text === "string" ? item.text : "";
+        if (text) console.log(pc.green(`assistant: ${text}`));
+      } else if (itemType === "tool_use") {
+        const name = typeof item.name === "string" ? item.name : "unknown";
+        console.log(pc.yellow(`tool_call: ${name}`));
+      }
+    }
+    return;
+  }
+
+  if (type === "turn.completed") {
+    const usage =
+      typeof parsed.usage === "object" && parsed.usage !== null && !Array.isArray(parsed.usage)
+        ? (parsed.usage as Record<string, unknown>)
+        : {};
+    const input = Number(usage.input_tokens ?? 0);
+    const output = Number(usage.output_tokens ?? 0);
+    const cached = Number(usage.cached_input_tokens ?? 0);
+    console.log(
+      pc.blue(`tokens: in=${input} out=${output} cached=${cached}`),
+    );
+    return;
+  }
+
+  console.log(line);
+}