Extract auto-reply helpers into modules

src/auto-reply/claude.ts

@@ -0,0 +1,60 @@
+// Helpers specific to Claude CLI output/argv handling.
+
+export const CLAUDE_BIN = "claude";
+
+function extractClaudeText(payload: unknown): string | undefined {
+	// Best-effort walker to find the primary text field in Claude JSON outputs.
+	if (payload == null) return undefined;
+	if (typeof payload === "string") return payload;
+	if (Array.isArray(payload)) {
+		for (const item of payload) {
+			const found = extractClaudeText(item);
+			if (found) return found;
+		}
+		return undefined;
+	}
+	if (typeof payload === "object") {
+		const obj = payload as Record<string, unknown>;
+		if (typeof obj.text === "string") return obj.text;
+		if (typeof obj.completion === "string") return obj.completion;
+		if (typeof obj.output === "string") return obj.output;
+		if (obj.message) {
+			const inner = extractClaudeText(obj.message);
+			if (inner) return inner;
+		}
+		if (Array.isArray(obj.messages)) {
+			const inner = extractClaudeText(obj.messages);
+			if (inner) return inner;
+		}
+		if (Array.isArray(obj.content)) {
+			for (const block of obj.content) {
+				if (
+					block &&
+					typeof block === "object" &&
+					(block as { type?: string }).type === "text" &&
+					typeof (block as { text?: unknown }).text === "string"
+				) {
+					return (block as { text: string }).text;
+				}
+				const inner = extractClaudeText(block);
+				if (inner) return inner;
+			}
+		}
+	}
+	return undefined;
+}
+
+export function parseClaudeJsonText(raw: string): string | undefined {
+	// Handle a single JSON blob or newline-delimited JSON; return the first extracted text.
+	const candidates = [raw, ...raw.split(/\n+/).map((s) => s.trim()).filter(Boolean)];
+	for (const candidate of candidates) {
+		try {
+			const parsed = JSON.parse(candidate);
+			const text = extractClaudeText(parsed);
+			if (text) return text;
+		} catch {
+			// ignore parse errors; try next candidate
+		}
+	}
+	return undefined;
+}