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AWS SFT data preparation guide

Preparing data for supervised fine-tuning Part 1: Formatting and quality

Why we picked it

The guide provides practical SFT data preparation techniques that developers in ASEAN can implement with AWS services to improve model performance.

AWS released the first part of a two-series guide on supervised fine-tuning data preparation. The post covers quality checks, JSONL formatting for conversational data, reasoning and tool-calling schemas, and train/evaluation split methodology. This foundational content addresses data preparation as the ceiling for SFT projects.

Image · AWS Machine Learning Blog
Original · AWS Machine Learning Blog

Preparing data for supervised fine-tuning Part 1: Formatting and quality

Data preparation determines the ceiling of any supervised fine-tuning project. This first post in a two-part series covers the foundations of SFT data prep: quality checks, conversational (JSONL) formatting, reasoning and tool-calling schemas, and a representative train/evaluation split.