skill-creator-ms

What this skill does

# Skill Creator

Guide for creating skills that extend AI agent capabilities, with emphasis on Azure SDKs and Microsoft Foundry.

> **Required Context:** When creating SDK or API skills, users MUST provide the SDK package name, documentation URL, or repository reference for the skill to be based on.

## About Skills

Skills are modular knowledge packages that transform general-purpose agents into specialized experts:

1. **Procedural knowledge** — Multi-step workflows for specific domains
2. **SDK expertise** — API patterns, authentication, error handling for Azure services
3. **Domain context** — Schemas, business logic, company-specific patterns
4. **Bundled resources** — Scripts, references, templates for complex tasks

---

## Core Principles

### 1. Concise is Key

The context window is a shared resource. Challenge each piece: "Does this justify its token cost?"

**Default assumption: Agents are already capable.** Only add what they don't already know.

### 2. Fresh Documentation First

**Azure SDKs change constantly.** Skills should instruct agents to verify documentation:

```markdown
## Before Implementation

Search `microsoft-docs` MCP for current API patterns:
- Query: "[SDK name] [operation] python"
- Verify: Parameters match your installed SDK version
```

### 3. Degrees of Freedom

Match specificity to task fragility:

| Freedom | When | Example |
|---------|------|---------|
| **High** | Multiple valid approaches | Text guidelines |
| **Medium** | Preferred pattern with variation | Pseudocode |
| **Low** | Must be exact | Specific scripts |

### 4. Progressive Disclosure

Skills load in three levels:

1. **Metadata** (~100 words) — Always in context
2. **SKILL.md body** (<5k words) — When skill triggers
3. **References** (unlimited) — As needed

**Keep SKILL.md under 500 lines.** Split into reference files when approaching this limit.

---

## Skill Structure

```
skill-name/
├── SKILL.md (required)
│   ├── YAML frontmatter (name, description)
│   └── Markdown instructions
└── Bundled Resources (optional)
    ├── scripts/      — Executable code
    ├── references/   — Documentation loaded as needed
    └── assets/       — Output resources (templates, images)
```

### SKILL.md

- **Frontmatter**: `name` and `description`. The description is the trigger mechanism.
- **Body**: Instructions loaded only after triggering.

### Bundled Resources

| Type | Purpose | When to Include |
|------|---------|-----------------|
| `scripts/` | Deterministic operations | Same code rewritten repeatedly |
| `references/` | Detailed patterns | API docs, schemas, detailed guides |
| `assets/` | Output resources | Templates, images, boilerplate |

**Don't include**: README.md, CHANGELOG.md, installation guides.

---

## Creating Azure SDK Skills

When creating skills for Azure SDKs, follow these patterns consistently.

### Skill Section Order

Follow this structure (based on existing Azure SDK skills):

1. **Title** — `# SDK Name`
2. **Installation** — `pip install`, `npm install`, etc.
3. **Environment Variables** — Required configuration
4. **Authentication** — Always `DefaultAzureCredential`
5. **Core Workflow** — Minimal viable example
6. **Feature Tables** — Clients, methods, tools
7. **Best Practices** — Numbered list
8. **Reference Links** — Table linking to `/references/*.md`

### Authentication Pattern (All Languages)

Always use `DefaultAzureCredential`:

```python
# Python
from azure.identity import DefaultAzureCredential
credential = DefaultAzureCredential()
client = ServiceClient(endpoint, credential)
```

```csharp
// C#
var credential = new DefaultAzureCredential();
var client = new ServiceClient(new Uri(endpoint), credential);
```

```java
// Java
TokenCredential credential = new DefaultAzureCredentialBuilder().build();
ServiceClient client = new ServiceClientBuilder()
    .endpoint(endpoint)
    .credential(credential)
    .buildClient();
```

```typescript
// TypeScript
import { DefaultAzureCredential } from "@azure/identity";
const credential = new DefaultAzureCredential();
const client = new ServiceClient(endpoint, credential);
```

**Never hardcode credentials. Use environment variables.**

### Standard Verb Patterns

Azure SDKs use consistent verbs across all languages:

| Verb | Behavior |
|------|----------|
| `create` | Create new; fail if exists |
| `upsert` | Create or update |
| `get` | Retrieve; error if missing |
| `list` | Return collection |
| `delete` | Succeed even if missing |
| `begin` | Start long-running operation |

### Language-Specific Patterns

See `references/azure-sdk-patterns.md` for detailed patterns including:

- **Python**: `ItemPaged`, `LROPoller`, context managers, Sphinx docstrings
- **.NET**: `Response<T>`, `Pageable<T>`, `Operation<T>`, mocking support
- **Java**: Builder pattern, `PagedIterable`/`PagedFlux`, Reactor types
- **TypeScript**: `PagedAsyncIterableIterator`, `AbortSignal`, browser considerations

### Example: Azure SDK Skill Structure

```markdown
---
name: skill-creator
description: |
  Azure AI Example SDK for Python. Use for [specific service features].
  Triggers: "example service", "create example", "list examples".
---

# Azure AI Example SDK

## Installation

\`\`\`bash
pip install azure-ai-example
\`\`\`

## Environment Variables

\`\`\`bash
AZURE_EXAMPLE_ENDPOINT=https://<resource>.example.azure.com
\`\`\`

## Authentication

\`\`\`python
from azure.identity import DefaultAzureCredential
from azure.ai.example import ExampleClient

credential = DefaultAzureCredential()
client = ExampleClient(
    endpoint=os.environ["AZURE_EXAMPLE_ENDPOINT"],
    credential=credential
)
\`\`\`

## Core Workflow

\`\`\`python
# Create
item = client.create_item(name="example", data={...})

# List (pagination handled automatically)
for item in client.list_items():
    print(item.name)

# Long-running operation
poller = client.begin_process(item_id)
result = poller.result()

# Cleanup
client.delete_item(item_id)
\`\`\`

## Reference Files

| File | Contents |
|------|----------|
| references/tools.md | Tool integrations |
| references/streaming.md | Event streaming patterns |
```

---

## Skill Creation Process

1. **Gather SDK Context** — User provides SDK/API reference (REQUIRED)
2. **Understand** — Research SDK patterns from official docs
3. **Plan** — Identify reusable resources and product area category
4. **Create** — Write SKILL.md in `.github/skills/<skill-name>/`
5. **Categorize** — Create symlink in `skills/<language>/<category>/`
6. **Test** — Create acceptance criteria and test scenarios
7. **Document** — Update README.md skill catalog
8. **Iterate** — Refine based on real usage

### Step 1: Gather SDK Context (REQUIRED)

**Before creating any SDK skill, the user MUST provide:**

| Required | Example | Purpose |
|----------|---------|---------|
| **SDK Package** | `azure-ai-agents`, `Azure.AI.OpenAI` | Identifies the exact SDK |
| **Documentation URL** | `https://learn.microsoft.com/en-us/azure/ai-services/...` | Primary source of truth |
| **Repository** (optional) | `Azure/azure-sdk-for-python` | For code patterns |

**Prompt the user if not provided:**
```
To create this skill, I need:
1. The SDK package name (e.g., azure-ai-projects)
2. The Microsoft Learn documentation URL or GitHub repo
3. The target language (py/dotnet/ts/java)
```

**Search official docs first:**
```bash
# Use microsoft-docs MCP to get current API patterns
# Query: "[SDK name] [operation] [language]"
# Verify: Parameters match the latest SDK version
```

### Step 2: Understand the Skill

Gather concrete examples:

- "What SDK operations should this skill cover?"
- "What triggers should activate this skill?"
- "What errors do developers commonly encounter?"

| Example Task | Reusable Resource |
|--------------|-------------------|
| Same auth code each time | Code example in SKILL.md |
| Complex streaming patterns | `references/streaming.md` |
| Tool configurations | `references/tools.md` |
| Error handling patterns | `