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Reading a new release v2.1.251 Analysing changes · 2/5 Sorting the findings · 1/4 steps 470 findings $18.91 so far

DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

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Claude Code v2.1.105

Skill Listing Configuration

What

New settings to control how skills are presented to Claude in the system prompt, giving users fine-grained control over context usage.

Details
  • skillListingMaxDescChars (default: 1536) — Per-skill description character cap. Descriptions longer than this are truncated.
  • skillListingBudgetFraction (default: 0.01 = 1%) — Fraction of the context window reserved for the skill listing. When the listing exceeds this, descriptions are shortened to fit.
  • skillOverrides — Per-skill visibility override keyed by skill name. Values:
  • "on" — full listing (default)
  • "name-only" — listed without description
  • "user-invocable-only" — hidden from the model but still available via /name
  • "off" — hidden from both model and user
  • These settings can be configured at policy, flag, project, user, and local settings levels.
Evidence

Skill listing settings (search for "skillListingMaxDescChars") and overrides (search for "skillOverrides")

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

See this entry in the whole of v2.1.105 →