--- title: "hi gi (@ouyang6341) | Hashnode" description: "hi gi (@ouyang6341) writes on Hashnode. Read their latest articles and follow their work." url: "https://hashnode.com/@ouyang6341" --- @ouyang6341 # hi gi @ouyang6341 · Joined November 2026 ### [Keeping Deal Data Fresh: Incremental Crawling and Change Detection for Price Tracking](https://savlume.hashnode.dev/keeping-deal-data-fresh-incremental-crawling-and-change-detection-for-price-tracking?utm_source=hashnode&utm_medium=feed) A price comparison site is only as useful as its last check. A deal that was real on Monday can be gone by Friday, and a price that moved overnight makes yesterday's guide wrong. At Savlume, we publis 5 min read · [savlume.hashnode.dev](https://savlume.hashnode.dev/keeping-deal-data-fresh-incremental-crawling-and-change-detection-for-price-tracking?utm_source=hashnode&utm_medium=feed) [1h ago](https://hashnode.com/posts/keeping-deal-data-fresh-incremental-crawling-and-change-detection-for-price-tracking/6af8f77b448eb49d3fda351a) ### [Designing RSS and API Feeds So Price Drops Reach Readers in Minutes](https://savlume.hashnode.dev/designing-rss-and-api-feeds-so-price-drops-reach-readers-in-minutes?utm_source=hashnode&utm_medium=feed) Designing RSS and API Feeds So Price Drops Reach Readers in Minutes This is the third post in our series on building Savlume (https://savlume.com/), a US deal tracker. The first covered our deal verif 5 min read · [savlume.hashnode.dev](https://savlume.hashnode.dev/designing-rss-and-api-feeds-so-price-drops-reach-readers-in-minutes?utm_source=hashnode&utm_medium=feed) [1d ago](https://hashnode.com/posts/designing-rss-and-api-feeds-so-price-drops-reach-readers-in-minutes/6af7afc459547f67f59d9b54) ### [Building an AI Shopping Assistant: Automated Price Tracking and GEO/AEO in Practice](https://savlume.hashnode.dev/building-an-ai-shopping-assistant-automated-price-tracking-and-geo-aeo-in-practice?utm_source=hashnode&utm_medium=feed) Building an AI Shopping Assistant: Automated Price Tracking and GEO/AEO in Practice This is the second post in our series on building Savlume, a US deal tracker. The first covered our deal verifier an 4 min read · [savlume.hashnode.dev](https://savlume.hashnode.dev/building-an-ai-shopping-assistant-automated-price-tracking-and-geo-aeo-in-practice?utm_source=hashnode&utm_medium=feed) [1d ago](https://hashnode.com/posts/building-an-ai-shopping-assistant-automated-price-tracking-and-geo-aeo-in-practice/6af6ad8fea5cc82d08f30e41) ### [Show HN: Savlume – An AI-verified US deal tracker with open MCP & llms.txt endpoints](https://savlume.hashnode.dev/show-hn-savlume-an-ai-verified-us-deal-tracker-with-open-mcp-llms-txt-endpoints?utm_source=hashnode&utm_medium=feed) Hi everyone, With Black Friday 2026 coming up, I got tired of fake "list prices" on retail sites where a $50 item is suddenly marked "50% off from $100". So I built \*\*Savlume\*\* (https://savlume.com/) 1 min read · [savlume.hashnode.dev](https://savlume.hashnode.dev/show-hn-savlume-an-ai-verified-us-deal-tracker-with-open-mcp-llms-txt-endpoints?utm_source=hashnode&utm_medium=feed) [3d ago](https://hashnode.com/posts/show-hn-savlume-an-ai-verified-us-deal-tracker-with-open-mcp-llms-txt-endpoints/6af43f47feb1aee66dcc4ae7) ### [How We Built an AI Shopping Deal Verifier with MCP & llms.txt](https://savlume.hashnode.dev/how-we-built-an-ai-shopping-deal-verifier-with-mcp-llms-txt?utm_source=hashnode&utm_medium=feed) Most deal sites have the same flaw: a price is shown with no evidence behind it. A "$100 off" badge means nothing if the reference price is inflated, the price is from last week, or "in stock" was nev 4 min read · [savlume.hashnode.dev](https://savlume.hashnode.dev/how-we-built-an-ai-shopping-deal-verifier-with-mcp-llms-txt?utm_source=hashnode&utm_medium=feed) [6d ago](https://hashnode.com/posts/how-we-built-an-ai-shopping-deal-verifier-with-mcp-llms-txt/6af0149195963d6e3bde93f0)