What probably matters to youSection of the release
What
The setup-health check run by /doctor scans project and user SKILL.md files for a YAML frontmatter block that fails to parse. Such a skill still loads, but every field is dropped: the name falls back to the directory name, the description to the first line of the body, and allowed-tools, model and disable-model-invocation stop applying with no warning at all. The check offers the frontmatter repair.
Details
Points at claude plugin validate <path> for checking many skills at once.
The skill's own description was updated to advertise the new check.
Evidence
Malformed skill frontmatter.
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
The entry above is what we published on the day. These lines were added later, as Anthropic's own pages caught up, and they sit beside the original rather than replacing it.
Confirmed sinceAnthropic's documentation has since written up /doctor, on CLI reference.| `claude doctor` | Print read-only installation and settings diagnostics from the terminal without starting a session, including install health, settings-file validation errors, and Remote Control eligibility. For the in-session setup che…cli-referencesee the edit
How sure we are
Two sources agreeTwo things we can check say the same as this entry.
Anthropic's documentation agreesAnthropic's documentation has since written up /doctor, on CLI reference.
Anthropic's release notes agreeImproved claude plugin validate to check a bare .claude/skills directory, reporting SKILL.md files whose frontmatter fails to parse
