refactor(skills): convert mt-webfetch script to Node.js for project consistency

.claude/skills/mt-webfetch/SKILL.md

@@ -28,7 +28,7 @@ Use this skill only after a WebFetch attempt returned one of:
 1. Confirm WebFetch already failed on the target URL
 2. Run the fetch script:
    ```bash
-   bash .claude/skills/mt-webfetch/scripts/fetch.sh "<target_url>"
+   node .claude/skills/mt-webfetch/scripts/fetch-via-defuddle.js "<target_url>"
    ```
    Alternatively, use WebFetch with the defuddle-prefixed URL:
    ```
@@ -70,7 +70,7 @@ Never loop. Never retry more than once.
 User wanted to extract content from https://example.com/article
 WebFetch returned: "Request failed with status code 403"
 → Trigger mt-webfetch
-→ bash .claude/skills/mt-webfetch/scripts/fetch.sh "https://example.com/article"
+→ node .claude/skills/mt-webfetch/scripts/fetch-via-defuddle.js "https://example.com/article"
 → Parse markdown output
 → Summarize as usual
 ```

.claude/skills/mt-webfetch/scripts/fetch-via-defuddle.js

@@ -0,0 +1,37 @@
+#!/usr/bin/env node
+// mt-webfetch fallback fetcher via defuddle.md
+// Usage: node fetch.js <target_url>
+// Exit codes: 0 = content returned, 1 = empty/failed, 2 = bad args
+
+const url = process.argv[2];
+if (!url) {
+  console.error("Usage: node fetch.js <target_url>");
+  process.exit(2);
+}
+
+const defuddleUrl = `https://defuddle.md/${url}`;
+
+async function main() {
+  const controller = new AbortController();
+  const timeout = setTimeout(() => controller.abort(), 30000);
+  try {
+    const res = await fetch(defuddleUrl, {
+      redirect: "follow",
+      signal: controller.signal,
+      headers: { "User-Agent": "mt-webfetch/1.0" },
+    });
+    clearTimeout(timeout);
+    const body = await res.text();
+    if (!res.ok || !body || body.trim().length === 0) {
+      console.error(`mt-webfetch: defuddle returned ${res.status} / empty body for ${url}`);
+      process.exit(1);
+    }
+    process.stdout.write(body);
+  } catch (err) {
+    clearTimeout(timeout);
+    console.error(`mt-webfetch: fetch failed for ${url}: ${err.message}`);
+    process.exit(1);
+  }
+}
+
+main();

.claude/skills/mt-webfetch/scripts/fetch.sh

@@ -1,27 +0,0 @@
-#!/usr/bin/env bash
-# mt-webfetch fallback fetcher via defuddle.md
-# Usage: bash fetch.sh <target_url>
-# Exit codes: 0 = content returned, 1 = empty/failed, 2 = bad args
-
-set -euo pipefail
-
-URL="${1:-}"
-if [[ -z "$URL" ]]; then
-  echo "Usage: fetch.sh <target_url>" >&2
-  exit 2
-fi
-
-# defuddle.md expects the target URL appended as path
-DEFUDDLE="https://defuddle.md/${URL}"
-
-# -s silent, -L follow redirects, -f fail on HTTP errors, --max-time 30s
-BODY=$(curl -sL --max-time 30 \
-  -A "Mozilla/5.0 (compatible; mt-webfetch/1.0)" \
-  "$DEFUDDLE" || true)
-
-if [[ -z "$BODY" ]]; then
-  echo "mt-webfetch: empty response from defuddle.md for $URL" >&2
-  exit 1
-fi
-
-echo "$BODY"