Fetch Watchlist Sources

Workflow

At start of weekly Trend Scout run:
- [ ] Step 1: Parse ops/trend-scout/watchlist.md; group by source_type
- [ ] Step 2: For each blog: WebFetch archive URL; extract posts from last 7 days
- [ ] Step 3: For each paper aggregator: WebFetch the listing URL; filter to last 7 days
- [ ] Step 4: For each X account / subreddit: WebFetch the public URL
- [ ] Step 5: Normalize each item
- [ ] Step 6: Deduplicate by URL
- [ ] Step 7: Write .cache/YYYY-WW-raw.jsonl

Guardrails