by 逆瀬川ちゃん
25 min read
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.
by 逆瀬川ちゃん
6 min read
Hi there! This is Sakasegawa (@gyakuse)!
Today I want to write about the difficulty of not building, something I've been thinking about lately.
by 逆瀬川ちゃん
44 min read
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.
by 逆瀬川ちゃん
16 min read
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.
by 逆瀬川ちゃん
16 min read
Hi there! This is Sakasegawa-chan (@gyakuse)!
Today I want to take a deep dive into skill-creator, a skill officially released by Anthropic.
skill-creator is "a skill for making skills," and the structure of the skill itself is actually a treasure trove of best practices for skill design. On top of that, I'll compare it with agentic-bench (introduction article), a skill I previously built for automatic ML model benchmarking, and think about how to design "skills that orchestrate multiple processes."