Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
SkillsArea: what it touches
Internal ChangesKind: in v2.1.280,
Internal ChangesSection of the release
What
The propose_skills tool (used to submit proposed skills, which are packaged instructions Claude Code can follow for a task) now runs an extra validation pass over all proposals before it gets to the existing check that requires a skill to have been read recently before it can be improved. If this new check fails, the tool returns an error (error code 2) with a message explaining the problem.
This builds on the tool's existing description-length cap, which previously enforced descriptions under 200 characters (never exceeding 1024).
Why
Catching invalid proposals earlier means the tool can reject bad input with a clear message before spending time on the later freshness check, giving faster and more direct feedback when a proposal is malformed.
Read from
Names in the bundlepropose_skills
How sure we are
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubtThe finding does not say what specifically makes a proposal fail this new validation.
