A 1,024-Character Limit Just Forced a Skill Rewrite
Anthropic renamed its claude-academy-guide Claude Agent Skill to academy-guide and shortened its description to comply with skill-upload validation rules for custom skills.
What it is
A follow-up commit to the academy-guide Claude Agent Skill that Anthropic added days earlier, renaming the skill folder, SKILL.md frontmatter, and marketplace.json entry.
What it does
It drops "claude" and "anthropic" from the skill's name because uploaded custom skills cannot contain those reserved words, and trims the description from 1,176 to 992 characters to fit the 1,024-character limit that skill-upload validation enforces on SKILL.md frontmatter.
Why it matters
If you're building your own custom Claude Agent Skill for upload, this is a concrete example of the two validation rules that will silently block a submission: no reserved words in the name, and a hard 1,024-character cap on the frontmatter description.
How to use it
Check your skill's name against the reserved-word list and count your frontmatter description's characters before attempting an upload, since validation failures happen at submission time with no obvious warning beforehand.
Claude Academy Guide Skill Reads a Live Course Catalog So It Never Goes Stale
The academy-guide Claude Agent Skill recommends matching Claude Academy courses and tutorials by reading a live catalog JSON at runtime instead of an embedded snapshot.
discernment-nudge: A Claude Skill That Tells You to Fact-Check Claude
discernment-nudge is an opt-in Claude Agent Skill that appends two or three follow-up questions after a substantive answer to help the user check facts and spot missing context.
claude-api Skill Gets an `upgrade` Subcommand for the 0.x to 1.x SDK Jump
Anthropic's claude-api Claude Agent Skill added an upgrade subcommand that walks a Python project through migrating from the anthropic 0.x SDK to 1.x, including the new httpx2 HTTP layer.