Skills
Claude Code adds a built-in Concise output style and cuts the claude-api skill from 200k tokens to 25k
Version 2.1.237 (Aug 20) ships a Concise output style, selectable under Output style in /config, that makes Claude lead with results and skip preamble and narration while doing the same work. Version 2.1.234 separately dropped the context cost of the bundled claude-api skill from over 200k tokens to about 25k by loading reference docs on demand. Both are worth copying in your own skills, load references lazily rather than inlining them, and put verbosity in a switchable style instead of repeating it in every prompt.
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