feat(baoyu-url-to-markdown): add URL-specific parser layer for X/Twitter and archive.ph

- New parsers/ module with pluggable rule system for site-specific HTML extraction
- X status parser: extract tweet text, media, quotes, author from data-testid elements
- X article parser: extract long-form article content with inline media
- archive.ph parser: restore original URL and prefer #CONTENT container
- Improved slug generation with stop words and content-aware slugs
- Output path uses subdirectory structure (domain/slug/slug.md)
- Fix: preserve anchor elements containing media in legacy converter
- Fix: smarter title deduplication in markdown document builder

skills/baoyu-url-to-markdown/scripts/parsers/rules/archive-ph.ts

@@ -0,0 +1,97 @@
+import { convertHtmlFragmentToMarkdown } from "../../legacy-converter.js";
+import {
+  normalizeMarkdown,
+  pickString,
+  type ConversionResult,
+} from "../../markdown-conversion-shared.js";
+import type { UrlRuleParser, UrlRuleParserContext } from "../types.js";
+
+const ARCHIVE_HOSTS = new Set([
+  "archive.ph",
+  "archive.is",
+  "archive.today",
+  "archive.md",
+  "archive.vn",
+  "archive.li",
+  "archive.fo",
+]);
+
+function isArchiveHost(url: string): boolean {
+  try {
+    return ARCHIVE_HOSTS.has(new URL(url).hostname.toLowerCase());
+  } catch {
+    return false;
+  }
+}
+
+function readOriginalUrl(document: Document): string | undefined {
+  const value = document.querySelector("input[name='q']")?.getAttribute("value")?.trim();
+  if (!value) return undefined;
+
+  try {
+    return new URL(value).href;
+  } catch {
+    return undefined;
+  }
+}
+
+function summarize(text: string, maxLength: number): string | undefined {
+  const normalized = text.replace(/\s+/g, " ").trim();
+  if (!normalized) return undefined;
+  if (normalized.length <= maxLength) return normalized;
+  return `${normalized.slice(0, Math.max(0, maxLength - 1)).trimEnd()}…`;
+}
+
+function pickContentRoot(document: Document): Element | null {
+  return (
+    document.querySelector("#CONTENT") ??
+    document.querySelector("#content") ??
+    document.body
+  );
+}
+
+function pickContentTitle(root: Element, fallbackTitle: string): string {
+  const contentTitle = pickString(
+    root.querySelector("h1")?.textContent,
+    root.querySelector("[itemprop='headline']")?.textContent,
+    root.querySelector("article h2")?.textContent
+  );
+  if (contentTitle) return contentTitle;
+  if (fallbackTitle && !/^archive\./i.test(fallbackTitle.trim())) return fallbackTitle;
+  return "";
+}
+
+function parseArchivePage(context: UrlRuleParserContext): ConversionResult | null {
+  const root = pickContentRoot(context.document);
+  if (!root) return null;
+
+  const markdown = normalizeMarkdown(convertHtmlFragmentToMarkdown(root.innerHTML));
+  if (!markdown) return null;
+
+  const originalUrl = readOriginalUrl(context.document) ?? context.baseMetadata.url;
+  const bodyText = root.textContent?.replace(/\s+/g, " ").trim() ?? "";
+  const published = root.querySelector("time[datetime]")?.getAttribute("datetime") ?? undefined;
+  const coverImage = root.querySelector("img[src]")?.getAttribute("src") ?? undefined;
+
+  return {
+    metadata: {
+      ...context.baseMetadata,
+      url: originalUrl,
+      title: pickContentTitle(root, context.baseMetadata.title),
+      description: summarize(bodyText, 220) ?? context.baseMetadata.description,
+      published: pickString(published, context.baseMetadata.published) ?? undefined,
+      coverImage: pickString(coverImage, context.baseMetadata.coverImage) ?? undefined,
+    },
+    markdown,
+    rawHtml: context.html,
+    conversionMethod: "parser:archive-ph",
+  };
+}
+
+export const archivePhRuleParser: UrlRuleParser = {
+  id: "archive-ph",
+  supports(context) {
+    return isArchiveHost(context.url);
+  },
+  parse: parseArchivePage,
+};