Feature: Make skill budget configurable or provide visibility into hidden skills

Problem

Claude Code has an undocumented ~16,000 character budget for the available_skills section. Users who install many skills (60+) find that some skills are silently hidden from the agent. There's no way to:

1. Know which skills are hidden without examining the system prompt
2. Configure or increase the budget
3. Prioritize which skills should be visible

Current Behavior

<!-- Showing 42 of 63 skills due to token limits -->

Hidden skills cannot be discovered or invoked by the agent, even if their names are explicitly typed.

Proposed Solutions

Any of these would improve the user experience:

Option A: Make budget configurable

Allow users to set the skill metadata budget in settings, trading off context window space for skill visibility.

{
  "skills": {
    "metadataBudget": 32000
  }
}

Option B: Skill prioritization

Allow users to mark certain skills as high-priority so they're always included in the visible set.

# In SKILL.md frontmatter
priority: high

Option C: On-demand skill loading

Instead of truncating, show abbreviated entries for overflow skills that can be expanded on request:

<skill name="evidence-reasoning" collapsed="true" />

Option D: Warning/visibility improvements

At minimum, surface which skills are hidden:

• Show a warning when skills are installed that would exceed budget
• List hidden skill names in the truncation comment
• Provide a command to see hidden skills

Research

Detailed empirical analysis: https://gist.github.com/alexey-pelykh/faa3c304f731d6a962efc5fa2a43abe1

Impact

Users building comprehensive skill libraries (methodologies, domain expertise, workflows) are limited to ~40-50 skills before hitting invisible truncation. This limits the utility of skills as a customization mechanism.