Allow disabling individual built-in skills to reduce fixed per-session context overhead

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

Claude Code loads ~2k tokens of built-in skill descriptions (15 skills) into every session's context, with no setting to disable individual built-in skills. For short sessions, this fixed overhead is a significant proportional tax on tokens billed, even though it's small relative to the total context window.

Proposed Solution

Add a settings.json option (e.g. disabledSkills: ["dataviz", "keybindings-help", ...]) that excludes listed built-in skills from the context injected at session start

Alternative Solutions

_No response_

Priority

Critical - Blocking my work

Feature Category

CLI commands and flags

Use Case Example

_No response_

Additional Context

_No response_