GreYat Web Scout: grounded web retrieval

GreYat Web Scout is a Match 4 agent for intelligent web information retrieval. It takes a natural-language question, with an optional start URL, and returns one exact value together with the page it came from. How it works: a language model (Qwen3-4B-Instruct, served on the AMD GPU by a resident process so each query skips the load time) first plans the lookup: search queries, likely official URLs, and package or project names. In parallel the agent queries several search engines and Wikipedia, and for "latest version" questions it reads the authoritative registries directly (PyPI, npm, GitHub releases, endoflife.date). It fetches the best pages, keeps the passages that match the question, and asks the model to extract a single value and say which passage it came from. Grounding comes first. An answer is only returned if the value appears verbatim on the cited page, so the source URL always backs up the answer. If no page confirms it, the agent returns an empty answer instead of a guess, and answers to "latest" questions are never taken from the model's memory. Version strings and numbers are normalised (v-prefixes, LTS labels, thousands separators) to match the grader. Everything runs locally on AMD ROCm with no external API keys. In development, on a 30-question set covering facts, ports, people, dates and live package versions, the pipeline answered 26 correctly (tested with a hosted stand-in model, since GPU time was not available).