refactor(shared): dedupe frontmatter parsing

src/shared/frontmatter.ts

@@ -0,0 +1,60 @@
+import JSON5 from "json5";
+import { LEGACY_MANIFEST_KEYS, MANIFEST_KEY } from "../compat/legacy-names.js";
+import { parseBooleanValue } from "../utils/boolean.js";
+
+export function normalizeStringList(input: unknown): string[] {
+  if (!input) {
+    return [];
+  }
+  if (Array.isArray(input)) {
+    return input.map((value) => String(value).trim()).filter(Boolean);
+  }
+  if (typeof input === "string") {
+    return input
+      .split(",")
+      .map((value) => value.trim())
+      .filter(Boolean);
+  }
+  return [];
+}
+
+export function getFrontmatterString(
+  frontmatter: Record<string, unknown>,
+  key: string,
+): string | undefined {
+  const raw = frontmatter[key];
+  return typeof raw === "string" ? raw : undefined;
+}
+
+export function parseFrontmatterBool(value: string | undefined, fallback: boolean): boolean {
+  const parsed = parseBooleanValue(value);
+  return parsed === undefined ? fallback : parsed;
+}
+
+export function resolveOpenClawManifestBlock(params: {
+  frontmatter: Record<string, unknown>;
+  key?: string;
+}): Record<string, unknown> | undefined {
+  const raw = getFrontmatterString(params.frontmatter, params.key ?? "metadata");
+  if (!raw) {
+    return undefined;
+  }
+
+  try {
+    const parsed = JSON5.parse(raw);
+    if (!parsed || typeof parsed !== "object") {
+      return undefined;
+    }
+
+    const manifestKeys = [MANIFEST_KEY, ...LEGACY_MANIFEST_KEYS];
+    for (const key of manifestKeys) {
+      const candidate = (parsed as Record<string, unknown>)[key];
+      if (candidate && typeof candidate === "object") {
+        return candidate as Record<string, unknown>;
+      }
+    }
+    return undefined;
+  } catch {
+    return undefined;
+  }
+}