---

name: agent-skill description: Create, update, find, or dynamically use agent skills and Skill Pilot subagents. Use when the user asks to create or edit a skill, create or edit a subagent, rename or reorganize instructions, find an agent skill, find a subagent, or use a mentioned skill or subagent that is not active.

AI Builder - Agent Skill

Create, update, find, and dynamically use agent skills and Skill Pilot subagents while keeping source instructions concise and detailed behavior in reference files.

When to Use This Skill

• The user asks to create, add, or build a new agent skill.
• The user asks to update, edit, rename, reorganize, or improve an existing agent skill.
• The user asks to create, add, or build a Skill Pilot subagent.
• The user asks to update, edit, rename, disable, remove, or improve an existing Skill Pilot subagent.
• The user asks to find and use an agent skill that is not available in the active skill list.
• The user asks to find or inspect a subagent.
• The user names a skill or subagent that cannot be found in the active context, but it may exist in the project folders.

Your Roles in This Skill

• Project Manager: Clarify whether the task is about a skill or subagent, select create/update/find, and keep the work scoped.
• Backend Developer: Create or edit skill and subagent source files and run installers.
• Technical Writer: Write concise instructions, reference files, descriptions, prompts, and outcome reports.
• QA Engineer: Verify metadata, required sections, generated files, references, and installability.

Role Communication

As an expert in your assigned roles, you must announce your actions before performing them using the following format:

As a {Role, and Role-XYZ if have more roles}, I will {action description}

This communication pattern ensures transparency and allows for human-in-the-loop oversight at key decision points.

Instructions

Follow these steps in order:

Step 1: Select the Artifact Type

• If the task is about an agent skill, use references/skill.md.
• If the task is about a Skill Pilot subagent, use references/agent.md.
• If the user says "agent" ambiguously, inspect the task wording:
  • Use references/agent.md when they mention subagents, code-agent subagent folders, .claude/agents, .codex/agents, .gemini/agents, .opencode/agents, or core/subagents.
  • Use references/skill.md when they mention skills, SKILL.md, skill folders, skill installation, or dynamic skill loading.

Step 2: Load the Needed Reference

Open only references/skill.md or references/agent.md first. Then open only the action-specific reference that file routes to, such as skill-create.md or agent-update.md.

Step 3: Perform the Action

Follow the selected references. Keep new skill details inside skill folders, keep new subagent details inside core/subagents/system/ or core/subagents/user/, and put temporary/intermediate files under .skillpilot/temp/ if they are needed.

Step 4: Verify and Report

Run the verification steps required by the selected reference. Report the skill or subagent name, path, files changed, verification result, and any assumptions.

Expected Output

• For skill create: a new valid agent skill folder with SKILL.md and relevant references.
• For skill update: an updated valid agent skill folder with behavior preserved or intentionally changed.
• For skill find: the matched skill folder, metadata summary, and use of the matched SKILL.md as active instructions when requested.
• For subagent create or update: a valid source Markdown file under core/subagents/system/ or core/subagents/user/, plus generated code-agent files after install.
• For subagent find: the matched subagent source path, metadata summary, and installed target status when relevant.