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/claude-local/src/ui/parse-stdout.ts

@@ -0,0 +1,103 @@
+import type { TranscriptEntry } from "@paperclip/adapter-utils";
+
+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 asNumber(value: unknown): number {
+  return typeof value === "number" && Number.isFinite(value) ? value : 0;
+}
+
+function errorText(value: unknown): string {
+  if (typeof value === "string") return value;
+  const rec = asRecord(value);
+  if (!rec) return "";
+  const msg =
+    (typeof rec.message === "string" && rec.message) ||
+    (typeof rec.error === "string" && rec.error) ||
+    (typeof rec.code === "string" && rec.code) ||
+    "";
+  if (msg) return msg;
+  try {
+    return JSON.stringify(rec);
+  } catch {
+    return "";
+  }
+}
+
+function safeJsonParse(text: string): unknown {
+  try {
+    return JSON.parse(text);
+  } catch {
+    return null;
+  }
+}
+
+export function parseClaudeStdoutLine(line: string, ts: string): TranscriptEntry[] {
+  const parsed = asRecord(safeJsonParse(line));
+  if (!parsed) {
+    return [{ kind: "stdout", ts, text: line }];
+  }
+
+  const type = typeof parsed.type === "string" ? parsed.type : "";
+  if (type === "system" && parsed.subtype === "init") {
+    return [
+      {
+        kind: "init",
+        ts,
+        model: typeof parsed.model === "string" ? parsed.model : "unknown",
+        sessionId: typeof parsed.session_id === "string" ? parsed.session_id : "",
+      },
+    ];
+  }
+
+  if (type === "assistant") {
+    const message = asRecord(parsed.message) ?? {};
+    const content = Array.isArray(message.content) ? message.content : [];
+    const entries: TranscriptEntry[] = [];
+    for (const blockRaw of content) {
+      const block = asRecord(blockRaw);
+      if (!block) continue;
+      const blockType = typeof block.type === "string" ? block.type : "";
+      if (blockType === "text") {
+        const text = typeof block.text === "string" ? block.text : "";
+        if (text) entries.push({ kind: "assistant", ts, text });
+      } else if (blockType === "tool_use") {
+        entries.push({
+          kind: "tool_call",
+          ts,
+          name: typeof block.name === "string" ? block.name : "unknown",
+          input: block.input ?? {},
+        });
+      }
+    }
+    return entries.length > 0 ? entries : [{ kind: "stdout", ts, text: line }];
+  }
+
+  if (type === "result") {
+    const usage = asRecord(parsed.usage) ?? {};
+    const inputTokens = asNumber(usage.input_tokens);
+    const outputTokens = asNumber(usage.output_tokens);
+    const cachedTokens = asNumber(usage.cache_read_input_tokens);
+    const costUsd = asNumber(parsed.total_cost_usd);
+    const subtype = typeof parsed.subtype === "string" ? parsed.subtype : "";
+    const isError = parsed.is_error === true;
+    const errors = Array.isArray(parsed.errors) ? parsed.errors.map(errorText).filter(Boolean) : [];
+    const text = typeof parsed.result === "string" ? parsed.result : "";
+    return [{
+      kind: "result",
+      ts,
+      text,
+      inputTokens,
+      outputTokens,
+      cachedTokens,
+      costUsd,
+      subtype,
+      isError,
+      errors,
+    }];
+  }
+
+  return [{ kind: "stdout", ts, text: line }];
+}