COSESAI

AI RAG Chunk Quality Scorer: The Four Metrics That Decide Whether Retrieval Answers Anything

By xiezixing 2026年7月7日

Chunk size is the upstream lever that decides whether RAG retrieval answers the question. Score three candidate schemes on coherence, coverage, overlap health, and chunk-size consistency before you index.

JSON to CSV Converter: three decisions for reliable exports — featured poster

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Three choices that decide whether your JSON→CSV export survives the next person who opens it

By xiezixing 2026年7月5日

JSON to CSV is one click — but it hides three decisions that decide whether the export survives: delimiter, nested-object handling, and date format.

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The first line of your CSV is doing more harm than you think

By xiezixing 2026年6月29日

Why the first row quietly breaks the rest of the file A CSV is supposed…

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The five boundary decisions that quietly break every model

By xiezixing 2026年6月28日

Every data pipeline eventually meets a value it does not expect. The temperature sensor reports…

Data Range Limiter: The Three Strategies That Decide Whether Your Data Cleansing Script Is Honest

By xiezixing 2026年6月28日

Clip, filter, or mark. The three strategies of the Data Range Limiter produce different outputs and different contracts with the rest of your pipeline. Pick the wrong one and you either lose rows you needed, or keep rows you said you cleaned.