Skill Creator

Skill Creator Skill

Create new MARVIN skills based on user requests.

When to Use

Trigger phrases:

• "Give yourself the ability to..."
• "Create a skill for..."
• "Add a workflow for..."
• "I want MARVIN to be able to..."

Process

Step 1: Understand the Request

Clarify:

• What should the skill do?
• When should it trigger?
• What inputs does it need?
• What output should it produce?

Step 2: Design the Skill

Determine:

• name: Short, kebab-case identifier (e.g., weekly-review)
• description: Clear explanation of purpose and triggers
• category: session, work, content, research, events, communication, meta
• user-invocable: Does it have a slash command?
• slash-command: If yes, what command? (e.g., /review)
• proactive: Should MARVIN detect and trigger automatically?

Step 3: Create Skill Directory

mkdir -p skills/{skill-name}

Step 4: Write SKILL.md

Create skills/{skill-name}/SKILL.md with:

---
name: {skill-name}
description: |
  {What this skill does and when to use it.}
license: MIT
compatibility: marvin
metadata:
  marvin-category: {category}
  user-invocable: {true|false}
  slash-command: {/command or null}
  model: default
  proactive: {true|false}
---

# {Skill Title}

{Brief description}

## When to Use

- {Trigger condition 1}
- {Trigger condition 2}

## Process

### Step 1: {First Step}
{Description}

### Step 2: {Second Step}
{Description}

## Output Format

{Expected output}

---

*Skill created: {TODAY}*

Step 5: Add Scripts (if needed)

If the skill requires code:

mkdir -p skills/{skill-name}/scripts

Create necessary scripts in that directory.

Step 6: Update Skill Index

Add the new skill to the Skill Index in CLAUDE.md:

| `{skill-name}` | {triggers} | {description} |

Step 7: Confirm Creation

Tell the user:

• Skill created at skills/{skill-name}/SKILL.md
• How to trigger it
• Ready to use immediately

Output Format

Created skill: **{skill-name}**
- Location: `skills/{skill-name}/SKILL.md`
- Trigger: {how to use it}
- Category: {category}

The skill is ready to use.

Notes

• Use the template at skills/_template/SKILL.md as a starting point
• Keep skills focused on one task
• Include clear trigger conditions so MARVIN knows when to use it

Skill created: 2026-01-22