Fix ui-parser exports: make self-contained and export parseStdoutLine directly

- ui-parser.ts: inline all logic, zero external imports (matches Paperclip
  adapter plugin UI parser contract)
- Export parseStdoutLine as named export from index.ts (like claude_k8s
  exports printClaudeStreamEvent directly)

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

src/index.ts

@@ -63,3 +63,4 @@ Notes:
 `;
 
 export { createServerAdapter } from "./server/index.js";
+export { parseStdoutLine } from "./ui-parser.js";

src/ui-parser.ts

@@ -3,7 +3,92 @@
  * Zero external imports — required by the Paperclip adapter plugin UI parser contract.
  */
 
-import type { TranscriptEntry } from "@paperclipai/adapter-utils";
-import { parseStdoutLine } from "./cli/format-event.js";
+type TranscriptEntry =
+  | { kind: "stdout"; ts: string; text: string }
+  | { kind: "stderr"; ts: string; text: string };
 
-export { parseStdoutLine };
+function asRecord(value: unknown): Record<string, unknown> {
+  if (value && typeof value === "object") {
+    return value as Record<string, unknown>;
+  }
+  return {};
+}
+
+function asString(value: unknown, fallback: string): string {
+  if (typeof value === "string") return value;
+  return fallback;
+}
+
+function safeJsonParse(text: string): Record<string, unknown> | null {
+  try {
+    const parsed = JSON.parse(text);
+    if (parsed && typeof parsed === "object") {
+      return parsed as Record<string, unknown>;
+    }
+    return null;
+  } catch {
+    return null;
+  }
+}
+
+function errorText(value: unknown): string {
+  if (typeof value === "string") return value;
+  const rec = asRecord(value);
+  const message = asString(rec.message, "").trim();
+  if (message) return message;
+  const data = asRecord(rec.data);
+  const nestedMessage = asString(data.message, "").trim();
+  if (nestedMessage) return nestedMessage;
+  const name = asString(rec.name, "").trim();
+  if (name) return name;
+  const code = asString(rec.code, "").trim();
+  if (code) return code;
+  try {
+    return JSON.stringify(rec);
+  } catch {
+    return "";
+  }
+}
+
+/**
+ * Parse a single stdout line into transcript entries for UI display.
+ * This is the Paperclip UI parser contract.
+ */
+export function parseStdoutLine(line: string, ts: string): TranscriptEntry[] {
+  const trimmed = line.trim();
+  if (!trimmed) return [];
+
+  const event = safeJsonParse(trimmed);
+  if (!event) {
+    // Non-JSON — treat as raw text
+    return [{ kind: "stdout", ts, text: trimmed }];
+  }
+
+  const type = asString(event.type, "");
+  const part = asRecord(event.part ?? {});
+
+  if (type === "text") {
+    const text = asString(part.text, "").trim();
+    if (text) return [{ kind: "stdout", ts, text }];
+    return [];
+  }
+
+  if (type === "step_finish") {
+    const text = asString(part.message, "").trim();
+    if (text) return [{ kind: "stdout", ts, text }];
+    return [];
+  }
+
+  // Skip non-display events (step_start, tool_use in normal mode)
+  if (type === "step_start" || type === "tool_use") {
+    return [];
+  }
+
+  if (type === "error") {
+    const text = errorText(event).trim();
+    if (text) return [{ kind: "stderr", ts, text }];
+    return [];
+  }
+
+  return [];
+}