Skill Router

Skill Router

Use this router when organizing, reclassifying, or validating a growing skill library. It keeps first-pass discovery small by routing from exposed category skills to hidden leaf skills. For third-party installs, configure the target roots explicitly instead of assuming the plugin is installed inside the same repository as the skills.

Token Budget Rule

Do not read every leaf SKILL.md by default. Start from routing/skill-inventory.json, routing/routing-review.md, routing/routing-index.json, and the exposed category router SKILL files. Read a leaf body only when the inventory summary is ambiguous or when moving it would change a category boundary.

The target skill roots come from skill-router.config.json or environment variables. For user-global skills, use hidden leaf roots such as ~/.claude/skill-leaves and expose category routers in ~/.claude/skills. For project skills, use .claude/skill-leaves and .claude/skills.

Workflow

1. Run node plugins/skill-router/scripts/skill-router.mjs scan to refresh compact metadata.
2. Read plugins/skill-router/routing/routing-review.md and existing category routers under plugins/skill-router/skills/.
3. Classify by workflow force and stop conditions, not by keyword alone.
4. Keep a skill in an existing category only when that category's Use When and Avoid rules stay clear.
5. If no existing category fits without vague wording, propose a new category in plugins/skill-router/routing/routing-plan.json.
6. Run node plugins/skill-router/scripts/skill-router.mjs apply only after the plan is coherent.
7. Run node plugins/skill-router/scripts/skill-router.mjs scan and node plugins/skill-router/scripts/skill-router.mjs validate.

New Category Test

Create a new category only when at least one of these is true:

• A skill would need mismatched special cases in every existing category.
• Three or more unclassified or awkwardly classified skills share the same distinct workflow force.
• Expanding an existing category would make its Avoid rules vague.
• The new category can name clear use_when, avoid_when, and leaf routes.

Routing Plan Shape

Write plans as JSON with categories and routes. skill-router.mjs apply is deterministic; the agent owns judgment, and the script only applies the approved plan.

{
  "categories": [
    {"id": "category-id", "display": "Category Name", "short": "Short focus", "description": "When to use first", "routing_prompt": "How to choose a leaf", "avoid": ["When not to use it"]}
  ],
  "routes": [
    {"category": "category-id", "skill": "leaf-skill", "reason": "Why this leaf belongs here"}
  ]
}

Stop

• The skill description is too generic to classify from inventory metadata.
• Existing categories fit for unrelated reasons and no dominant force is clear.
• The plan creates a catch-all category such as misc, general, or other.
• Applying the plan would hide a useful distinction that the user needs for routing.