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Hi there! This is Sakasegawa-chan (@gyakuse)!

Today I want to write up a comparison I did, hunting for an OCR that can transcribe Japanese handwritten notes nicely — I went through 23 models head-to-head.

Hi there! This is Sakasegawa-chan (@gyakuse)!

Today I want to walk through development workflows in the Coding Agent era, covering both the popular practices and the approaches I personally use.

Hi there! This is Sakasegawa-chan (@gyakuse)!

Today I want to do a deep dive into harness engineering and summarize best practices as of March 2026.

Hi there! This is Sakasegawa (@gyakuse)!

Today I want to write about the difficulty of not building, something I've been thinking about lately.

Hi there! This is Sakasegawa-chan (@gyakuse)!

Today I want to cover GPT-5.4, released earlier today by OpenAI: the instructions evolution readable from the Codex repo's source code, how to enable the 1M-context window, and benchmark comparisons with other models.