Create a Skill

When to Use

Create a new skill when:

• There's a pattern the agent should follow repeatedly.
• A multi-step workflow needs reliable, step-by-step guidance.
• You want to scaffold files from a template.

Don't create a skill when:

• The guidance already exists in another skill — extend it instead.
• You're documenting something the agent already knows (e.g., how to write
  TypeScript).
• It's a one-off — put it in AGENTS.md (for everyone) or memory/MEMORY.md
  (personal, per-user). See capture-learnings.

Interview

Before writing the skill, answer these:

1. What should this skill enable? — The core purpose in one sentence.
2. Which of the four areas does it serve? — UI, actions, skills/instructions,
   or application state (see the adding-a-feature skill). Most skills are
   about how to touch one or more of these correctly.
3. When should it trigger? — Describe the situations in natural language.
4. Does it involve context awareness? — Does the agent need to know what the
   user is looking at? If so, reference the navigation application-state key and
   the view-screen action pattern. See the context-awareness skill.
5. What type of skill? — Pattern, Workflow, or Generator (see below).
6. Does it need supporting files? — References (read-only context) or none.
   Keep it minimal; push depth into references/.

Skill Types and Templates

Pattern (architectural rule)

For documenting how things should be done:

---
name: my-pattern
description: >-
  [Under 40 words. What it covers AND when it should trigger.]
---

# [Pattern Name]

## Rule

[One sentence: what must be true]

## Why

[Why this rule exists]

## How

[How to follow it, with code examples]

## Don't

[Common violations]

## Related Skills

[Which skills compose with this one]

Workflow (step-by-step)

For multi-step implementation tasks:

---
name: my-workflow
description: >-
  [Under 40 words. What it covers AND when it should trigger.]
---

# [Workflow Name]

## Prerequisites

[What must be in place first]

## Steps

[Numbered steps with code examples]

## Verification

[How to confirm it worked]

## Troubleshooting

[Common issues and fixes]

## Related Skills

Generator (scaffolding)

For creating files from templates:

---
name: my-generator
description: >-
  [Under 40 words. What it covers AND when it should trigger.]
---

# [Generator Name]

## Usage

[How to invoke — what args/inputs are needed]

## What Gets Created

[List of files and their purpose]

## Template

[The template content with placeholders]

## After Generation

[What to do next — wire up sync, add routes, register the action, etc.]

## Related Skills

Naming Conventions

• Hyphen-case only: [a-z0-9-], max 64 characters.
• Pattern skills: descriptive names (storing-data, delegate-to-agent).
• Workflow/generator skills: verb-noun (create-skill, capture-learnings).
• The directory name must match the name in frontmatter.

Frontmatter Fields

Field	Required	Value
name	yes	Hyphen-case, matches the directory name
description	yes	What the skill covers AND when it triggers
scope	no	both (default) | runtime | dev

For how to word a description and which scope a skill should get, follow
writing-agent-instructions — it owns those rules.

Tips

• Keep SKILL.md lean (under ~500 lines) — move detailed content to
  references/ files.
• Use standard markdown headings — no XML tags or custom formats.

Anti-Patterns

• Inline LLM calls — skills must not call LLMs directly. All AI work goes
  through the agent chat (see delegate-to-agent).
• Introducing databases — data lives in SQL via Drizzle (see storing-data).
• Ignoring sync — if a skill creates data, mention wiring useDbSync /
  useActionQuery so the UI updates (see real-time-sync).
• Pure documentation — skills should guide action, not just explain concepts.

File Structure

.agents/skills/my-skill/
├── SKILL.md              # Main skill (required)
└── references/           # Optional supporting context
    └── detailed-guide.md

Related Skills

• adding-a-feature — The four-area model every skill ultimately serves.
• writing-agent-instructions — How to write AGENTS.md and skills well for
  apps and templates you ship to others.
• capture-learnings — When a learning graduates to reusable guidance, create
  a skill; one-offs go to AGENTS.md or memory/MEMORY.md.
• self-modifying-code — The agent can create new skills (Tier 2 modification).