Code Agent Anatomy (22): Expanding from Zero – Writing a Skill Using Markdown

On September 7, 2026, Rare Gold published “Code Agent Analysis (22): Expanding from Zero – Writing a Skill Using Markdown”. This report details how to write and integrate custom skills into the Code Agent system using Markdown format without relying on predefined plugins. The article demonstrates the entire process through specific examples: from defining skill structures, writing execution logic, to successful operation in the environment, showing how users can expand the functionality and evolve code agents through standardized text descriptions.