Hugging Face Datasets V2

---
name: "hugging-face-datasets-v2"
description: "Overview workflow skill. Use this skill when the user needs Create and manage datasets on Hugging Face Hub. Supports initializing repos, defining configs/system prompts, streaming row updates, and SQL-based dataset querying/transformation. Designed to work alongside HF MCP server for comprehensive dataset workflows and the operator should preserve the upstream workflow, copied support files, and provenance before merging or handing off."
version: "0.0.1"
category: "data-ai"
tags:
  - "hugging-face-datasets-v2"
  - "hugging-face-datasets"
  - "create"
  - "and"
  - "manage"
  - "datasets"
  - "hugging"
  - "face"
  - "omni-enhanced"
complexity: "advanced"
risk: "safe"
tools:
  - "codex-cli"
  - "claude-code"
  - "cursor"
  - "gemini-cli"
  - "opencode"
source: "omni-team"
author: "Omni Skills Team"
date_added: "2026-04-16"
date_updated: "2026-05-10"
source_type: "omni-curated"
maintainer: "Omni Skills Team"
family_id: "hugging-face-datasets-v2"
family_name: "Overview"
variant_id: "omni"
variant_label: "Omni Curated"
is_default_variant: true
derived_from: "skills/hugging-face-datasets-v2"
upstream_skill: "skills/hugging-face-datasets-v2"
upstream_author: "sickn33"
upstream_source: "community"
upstream_pr: "271"
upstream_head_repo: "diegosouzapw/awesome-omni-skills"
upstream_head_sha: "93ab394af5645f7127d5003ee02c9566ae5353cd"
curation_surface: "skills_omni"
enhanced_origin: "omni-skills-private"
source_repo: "diegosouzapw/awesome-omni-skills"
replaces:
  - "hugging-face-datasets-v2"
---

# Overview

## Overview

This public intake copy packages `plugins/antigravity-awesome-skills/skills/hugging-face-datasets` from `https://github.com/sickn33/antigravity-awesome-skills` into the native Omni Skills editorial shape without hiding its origin.

Use it when the operator needs the upstream workflow, support files, and repository context to stay intact while the public validator and private enhancer continue their normal downstream flow.

This intake keeps the copied upstream files intact and uses the `external_source` block in `metadata.json` plus `ORIGIN.md` as the provenance anchor for review.

# Overview This skill provides tools to manage datasets on the Hugging Face Hub with a focus on creation, configuration, content management, and SQL-based data manipulation. It is designed to complement the existing Hugging Face MCP server by providing dataset editing and querying capabilities.

Imported source sections that did not map cleanly to the public headings are still preserved below or in the support files. Notable imported sections: Integration with HF MCP Server, 1. Dataset Lifecycle Management, 2. SQL-Based Dataset Querying (NEW), 3. Multi-Format Dataset Support, 4. Quality Assurance Features, SQL Query Syntax.

## When to Use This Skill

Use this section as the trigger filter. It should make the activation boundary explicit before the operator loads files, runs commands, or opens a pull request.

- You need to create, configure, or update datasets on the Hugging Face Hub.
- You want SQL-style querying, transformation, or export flows over Hub datasets.
- You are managing dataset content and metadata directly rather than only searching existing datasets.
- Use when the request clearly matches the imported source intent: Create and manage datasets on Hugging Face Hub. Supports initializing repos, defining configs/system prompts, streaming row updates, and SQL-based dataset querying/transformation. Designed to work alongside HF MCP....
- Use when the operator should preserve upstream workflow detail instead of rewriting the process from scratch.
- Use when provenance needs to stay visible in the answer, PR, or review packet.

## Operating Table

| Situation | Start here | Why it matters |
| --- | --- | --- |
| First-time use | `metadata.json` | Confirms repository, branch, commit, and imported path through the `external_source` block before touching the copied workflow |
| Provenance review | `ORIGIN.md` | Gives reviewers a plain-language audit trail for the imported source |
| Workflow execution | `SKILL.md` | Starts with the smallest copied file that materially changes execution |
| Supporting context | `SKILL.md` | Adds the next most relevant copied source file without loading the entire package |
| Handoff decision | `## Related Skills` | Helps the operator switch to a stronger native skill when the task drifts |

## Workflow

This workflow is intentionally editorial and operational at the same time. It keeps the imported source useful to the operator while still satisfying the public intake standards that feed the downstream enhancer flow.

1. Confirm the user goal, the scope of the imported workflow, and whether this skill is still the right router for the task.
2. Read the overview and provenance files before loading any copied upstream support files.
3. Load only the references, examples, prompts, or scripts that materially change the outcome for the current request.
4. Execute the upstream workflow while keeping provenance and source boundaries explicit in the working notes.
5. Validate the result against the upstream expectations and the evidence you can point to in the copied files.
6. Escalate or hand off to a related skill when the work moves out of this imported workflow's center of gravity.
7. Before merge or closure, record what was used, what changed, and what the reviewer still needs to verify.

### Imported Workflow Notes

#### Imported: Integration with HF MCP Server

- **Use HF MCP Server for**: Dataset discovery, search, and metadata retrieval
- **Use This Skill for**: Dataset creation, content editing, SQL queries, data transformation, and structured data formatting

# Version
2.1.0

# Dependencies
# This skill uses PEP 723 scripts with inline dependency management
# Scripts auto-install requirements when run with: uv run scripts/script_name.py

- uv (Python package manager)
- Getting Started: See "Usage Instructions" below for PEP 723 usage

# Core Capabilities

## Examples

### Example 1: Ask for the upstream workflow directly

```text
Use @hugging-face-datasets-v2 to handle <task>. Start from the copied upstream workflow, load only the files that change the outcome, and keep provenance visible in the answer.
```

**Explanation:** This is the safest starting point when the operator needs the imported workflow, but not the entire repository.

### Example 2: Ask for a provenance-grounded review

```text
Review @hugging-face-datasets-v2 against metadata.json and ORIGIN.md, then explain which copied upstream files you would load first and why.
```

**Explanation:** Use this before review or troubleshooting when you need a precise, auditable explanation of origin and file selection.

### Example 3: Narrow the copied support files before execution

```text
Use @hugging-face-datasets-v2 for <task>. Load only the copied references, examples, or scripts that change the outcome, and name the files explicitly before proceeding.
```

**Explanation:** This keeps the skill aligned with progressive disclosure instead of loading the whole copied package by default.

### Example 4: Build a reviewer packet

```text
Review @hugging-face-datasets-v2 using the copied upstream files plus provenance, then summarize any gaps before merge.
```

**Explanation:** This is useful when the PR is waiting for human review and you want a repeatable audit packet.

### Imported Usage Notes

#### Imported: Quick Start

```bash
# Query a dataset
uv run scripts/sql_manager.py query \
  --dataset "cais/mmlu" \
  --sql "SELECT * FROM data WHERE subject='nutrition' LIMIT 10"

# Get dataset schema
uv run scripts/sql_manager.py describe --dataset "cais/mmlu"

# Sample random rows
uv run scripts/sql_manager.py sample --dataset "cais/mmlu" --n 5

# Count rows with filter
uv run scripts/sql_manager.py count --dataset "cais/mmlu" --where "subject='nutrition'"
```

#### Imported: Python API Usage

```python
from sql_manager import HFDatasetSQL

sql = HFDatasetSQL()

# Query
results = sql.query("cais/mmlu", "SELECT * FROM data WHERE subject='nutrition' LIMIT 10")

# Get schema
schema = sql.describe("cais/mmlu")

# Sample
samples = sql.sample("cais/mmlu", n=5, seed=42)

# Count
count = sql.count("cais/mmlu", where="subject='nutrition'")

# Histogram
dist = sql.histogram("cais/mmlu", "subject")

# Filter and transform
results = sql.filter_and_transform(
    "cais/mmlu",
    select="subject, COUNT(*) as cnt",
    group_by="subject",
    order_by="cnt DESC",
    limit=10
)

# Push to Hub
url = sql.push_to_hub(
    "cais/mmlu",
    "username/nutrition-subset",
    sql="SELECT * FROM data WHERE subject='nutrition'",
    private=True
)

# Export locally
sql.export_to_parquet("cais/mmlu", "output.parquet", sql="SELECT * FROM data LIMIT 100")

sql.close()
```

#### Imported: TRAINING EXAMPLE STRUCTURE

[Specify exact JSON schema for chat templating]

#### Imported: EXAMPLE CATEGORIES

[List development workflows, debugging scenarios, data management tasks]
```

### Example Categories & Templates

The skill includes diverse training examples beyond just MCP usage:

**Available Example Sets:**
- `training_examples.json` - MCP tool usage examples (debugging, project setup, database analysis)
- `diverse_training_examples.json` - Broader scenarios including:
  - **Educational Chat** - Explaining programming concepts, tutorials
  - **Git Workflows** - Feature branches, version control guidance
  - **Code Analysis** - Performance optimization, architecture review
  - **Content Generation** - Professional writing, creative brainstorming
  - **Codebase Navigation** - Legacy code exploration, systematic analysis
  - **Conversational Support** - Problem-solving, technical discussions

**Using Different Example Sets:**
```bash
# Add MCP-focused examples
uv run scripts/dataset_manager.py add_rows --repo_id "your-username/dataset-name" \
  --rows_json "$(cat examples/training_examples.json)"

# Add diverse conversational examples
uv run scripts/dataset_manager.py add_rows --repo_id "your-username/dataset-name" \
  --rows_json "$(cat examples/diverse_training_examples.json)"

# Mix both for comprehensive training data
uv run scripts/dataset_manager.py add_rows --repo_id "your-username/dataset-name" \
  --rows_json "$(jq -s '.[0] + .[1]' examples/training_examples.json examples/diverse_training_examples.json)"
```

### Commands Reference

**List Available Templates:**
```bash
uv run scripts/dataset_manager.py list_templates
```

**Quick Setup (Recommended):**
```bash
uv run scripts/dataset_manager.py quick_setup --repo_id "your-username/dataset-name" --template classification
```

**Manual Setup:**
```bash
# Initialize repository
uv run scripts/dataset_manager.py init --repo_id "your-username/dataset-name" [--private]

# Configure with system prompt
uv run scripts/dataset_manager.py config --repo_id "your-username/dataset-name" --system_prompt "Your prompt here"

# Add data with validation
uv run scripts/dataset_manager.py add_rows \
  --repo_id "your-username/dataset-name" \
  --template qa \
  --rows_json '[{"question": "What is AI?", "answer": "Artificial Intelligence..."}]'
```

**View Dataset Statistics:**
```bash
uv run scripts/dataset_manager.py stats --repo_id "your-username/dataset-name"
```

### Error Handling
- **Repository exists**: Script will notify and continue with configuration
- **Invalid JSON**: Clear error message with parsing details
- **Network issues**: Automatic retry for transient failures
- **Token permissions**: Validation before operations begin

---

# Combined Workflow Examples

#### Imported: Example 1: Create Training Subset from Existing Dataset

```bash
# 1. Explore the source dataset
uv run scripts/sql_manager.py describe --dataset "cais/mmlu"
uv run scripts/sql_manager.py histogram --dataset "cais/mmlu" --column "subject"

# 2. Query and create subset
uv run scripts/sql_manager.py query \
  --dataset "cais/mmlu" \
  --sql "SELECT * FROM data WHERE subject IN ('nutrition', 'anatomy', 'clinical_knowledge')" \
  --push-to "username/mmlu-medical-subset" \
  --private
```

#### Imported: Example 2: Transform and Reshape Data

```bash
# Transform MMLU to QA format with correct answers extracted
uv run scripts/sql_manager.py query \
  --dataset "cais/mmlu" \
  --sql "SELECT question, choices[answer] as correct_answer, subject FROM data" \
  --push-to "username/mmlu-qa-format"
```

#### Imported: Example 3: Merge Multiple Dataset Splits

```bash
# Export multiple splits and combine
uv run scripts/sql_manager.py export \
  --dataset "cais/mmlu" \
  --split "*" \
  --output "mmlu_all.parquet"
```

#### Imported: Example 4: Quality Filtering

```bash
# Filter for high-quality examples
uv run scripts/sql_manager.py query \
  --dataset "squad" \
  --sql "SELECT * FROM data WHERE LENGTH(context) > 500 AND LENGTH(question) > 20" \
  --push-to "username/squad-filtered"
```

#### Imported: Example 5: Create Custom Training Dataset

```bash
# 1. Query source data
uv run scripts/sql_manager.py export \
  --dataset "cais/mmlu" \
  --sql "SELECT question, subject FROM data WHERE subject='nutrition'" \
  --output "nutrition_source.jsonl" \
  --format jsonl

# 2. Process with your pipeline (add answers, format, etc.)

# 3. Push processed data
uv run scripts/dataset_manager.py init --repo_id "username/nutrition-training"
uv run scripts/dataset_manager.py add_rows \
  --repo_id "username/nutrition-training" \
  --template qa \
  --rows_json "$(cat processed_data.json)"
```

## Best Practices

Treat the generated public skill as a reviewable packaging layer around the upstream repository. The goal is to keep provenance explicit and load only the copied source material that materially improves execution.

- [Detail requirements for realistic scenarios, progressive complexity, proper tool usage]
- Keep the imported skill grounded in the upstream repository; do not invent steps that the source material cannot support.
- Prefer the smallest useful set of support files so the workflow stays auditable and fast to review.
- Keep provenance, source commit, and imported file paths visible in notes and PR descriptions.
- Point directly at the copied upstream files that justify the workflow instead of relying on generic review boilerplate.
- Treat generated examples as scaffolding; adapt them to the concrete task before execution.
- Route to a stronger native skill when architecture, debugging, design, or security concerns become dominant.

### Imported Operating Notes

#### Imported: QUALITY GUIDELINES

[Detail requirements for realistic scenarios, progressive complexity, proper tool usage]

## Troubleshooting

### Problem: The operator skipped the imported context and answered too generically

**Symptoms:** The result ignores the upstream workflow in `plugins/antigravity-awesome-skills/skills/hugging-face-datasets`, fails to mention provenance, or does not use any copied source files at all.
**Solution:** Re-open `metadata.json`, `ORIGIN.md`, and the most relevant copied upstream files. Check the `external_source` block first, then restate the provenance before continuing.

### Problem: The imported workflow feels incomplete during review

**Symptoms:** Reviewers can see the generated `SKILL.md`, but they cannot quickly tell which references, examples, or scripts matter for the current task.
**Solution:** Point at the exact copied references, examples, scripts, or assets that justify the path you took. If the gap is still real, record it in the PR instead of hiding it.

### Problem: The task drifted into a different specialization

**Symptoms:** The imported skill starts in the right place, but the work turns into debugging, architecture, design, security, or release orchestration that a native skill handles better.
**Solution:** Use the related skills section to hand off deliberately. Keep the imported provenance visible so the next skill inherits the right context instead of starting blind.



## Related Skills

- `@00-andruia-consultant` - Use when the work is better handled by that native specialization after this imported skill establishes context.
- `@00-andruia-consultant-v2` - Use when the work is better handled by that native specialization after this imported skill establishes context.
- `@10-andruia-skill-smith` - Use when the work is better handled by that native specialization after this imported skill establishes context.
- `@10-andruia-skill-smith-v2` - Use when the work is better handled by that native specialization after this imported skill establishes context.

## Additional Resources

Use this support matrix and the linked files below as the operator packet for this imported skill. They should reflect real copied source material, not generic scaffolding.

| Resource family | What it gives the reviewer | Example path |
| --- | --- | --- |
| `references` | copied reference notes, guides, or background material from upstream | `references/n/a` |
| `examples` | worked examples or reusable prompts copied from upstream | `examples/n/a` |
| `scripts` | upstream helper scripts that change execution or validation | `scripts/n/a` |
| `agents` | routing or delegation notes that are genuinely part of the imported package | `agents/n/a` |
| `assets` | supporting assets or schemas copied from the source package | `assets/n/a` |



### Imported Reference Notes

#### Imported: 1. Dataset Lifecycle Management

- **Initialize**: Create new dataset repositories with proper structure
- **Configure**: Store detailed configuration including system prompts and metadata
- **Stream Updates**: Add rows efficiently without downloading entire datasets

#### Imported: 2. SQL-Based Dataset Querying (NEW)

Query any Hugging Face dataset using DuckDB SQL via `scripts/sql_manager.py`:
- **Direct Queries**: Run SQL on datasets using the `hf://` protocol
- **Schema Discovery**: Describe dataset structure and column types
- **Data Sampling**: Get random samples for exploration
- **Aggregations**: Count, histogram, unique values analysis
- **Transformations**: Filter, join, reshape data with SQL
- **Export & Push**: Save results locally or push to new Hub repos

#### Imported: 3. Multi-Format Dataset Support

Supports diverse dataset types through template system:
- **Chat/Conversational**: Chat templating, multi-turn dialogues, tool usage examples
- **Text Classification**: Sentiment analysis, intent detection, topic classification
- **Question-Answering**: Reading comprehension, factual QA, knowledge bases
- **Text Completion**: Language modeling, code completion, creative writing
- **Tabular Data**: Structured data for regression/classification tasks
- **Custom Formats**: Flexible schema definition for specialized needs

#### Imported: 4. Quality Assurance Features

- **JSON Validation**: Ensures data integrity during uploads
- **Batch Processing**: Efficient handling of large datasets
- **Error Recovery**: Graceful handling of upload failures and conflicts

# Usage Instructions

The skill includes two Python scripts that use PEP 723 inline dependency management:

> **All paths are relative to the directory containing this SKILL.md
file.**
> Scripts are run with: `uv run scripts/script_name.py [arguments]`

- `scripts/dataset_manager.py` - Dataset creation and management
- `scripts/sql_manager.py` - SQL-based dataset querying and transformation

### Prerequisites
- `uv` package manager installed
- `HF_TOKEN` environment variable must be set with a Write-access token

---

# SQL Dataset Querying (sql_manager.py)

Query, transform, and push Hugging Face datasets using DuckDB SQL. The `hf://` protocol provides direct access to any public dataset (or private with token).

#### Imported: SQL Query Syntax

Use `data` as the table name in your SQL - it gets replaced with the actual `hf://` path:

```sql
-- Basic select
SELECT * FROM data LIMIT 10

-- Filtering
SELECT * FROM data WHERE subject='nutrition'

-- Aggregations
SELECT subject, COUNT(*) as cnt FROM data GROUP BY subject ORDER BY cnt DESC

-- Column selection and transformation
SELECT question, choices[answer] AS correct_answer FROM data

-- Regex matching
SELECT * FROM data WHERE regexp_matches(question, 'nutrition|diet')

-- String functions
SELECT regexp_replace(question, '\n', '') AS cleaned FROM data
```

#### Imported: Common Operations

### 1. Explore Dataset Structure
```bash
# Get schema
uv run scripts/sql_manager.py describe --dataset "cais/mmlu"

# Get unique values in column
uv run scripts/sql_manager.py unique --dataset "cais/mmlu" --column "subject"

# Get value distribution
uv run scripts/sql_manager.py histogram --dataset "cais/mmlu" --column "subject" --bins 20
```

### 2. Filter and Transform
```bash
# Complex filtering with SQL
uv run scripts/sql_manager.py query \
  --dataset "cais/mmlu" \
  --sql "SELECT subject, COUNT(*) as cnt FROM data GROUP BY subject HAVING cnt > 100"

# Using transform command
uv run scripts/sql_manager.py transform \
  --dataset "cais/mmlu" \
  --select "subject, COUNT(*) as cnt" \
  --group-by "subject" \
  --order-by "cnt DESC" \
  --limit 10
```

### 3. Create Subsets and Push to Hub
```bash
# Query and push to new dataset
uv run scripts/sql_manager.py query \
  --dataset "cais/mmlu" \
  --sql "SELECT * FROM data WHERE subject='nutrition'" \
  --push-to "username/mmlu-nutrition-subset" \
  --private

# Transform and push
uv run scripts/sql_manager.py transform \
  --dataset "ibm/duorc" \
  --config "ParaphraseRC" \
  --select "question, answers" \
  --where "LENGTH(question) > 50" \
  --push-to "username/duorc-long-questions"
```

### 4. Export to Local Files
```bash
# Export to Parquet
uv run scripts/sql_manager.py export \
  --dataset "cais/mmlu" \
  --sql "SELECT * FROM data WHERE subject='nutrition'" \
  --output "nutrition.parquet" \
  --format parquet

# Export to JSONL
uv run scripts/sql_manager.py export \
  --dataset "cais/mmlu" \
  --sql "SELECT * FROM data LIMIT 100" \
  --output "sample.jsonl" \
  --format jsonl
```

### 5. Working with Dataset Configs/Splits
```bash
# Specify config (subset)
uv run scripts/sql_manager.py query \
  --dataset "ibm/duorc" \
  --config "ParaphraseRC" \
  --sql "SELECT * FROM data LIMIT 5"

# Specify split
uv run scripts/sql_manager.py query \
  --dataset "cais/mmlu" \
  --split "test" \
  --sql "SELECT COUNT(*) FROM data"

# Query all splits
uv run scripts/sql_manager.py query \
  --dataset "cais/mmlu" \
  --split "*" \
  --sql "SELECT * FROM data LIMIT 10"
```

### 6. Raw SQL with Full Paths
For complex queries or joining datasets:
```bash
uv run scripts/sql_manager.py raw --sql "
  SELECT a.*, b.*
  FROM 'hf://datasets/dataset1@~parquet/default/train/*.parquet' a
  JOIN 'hf://datasets/dataset2@~parquet/default/train/*.parquet' b
  ON a.id = b.id
  LIMIT 100
"
```

#### Imported: HF Path Format

DuckDB uses the `hf://` protocol to access datasets:
```
hf://datasets/{dataset_id}@{revision}/{config}/{split}/*.parquet
```

Examples:
- `hf://datasets/cais/mmlu@~parquet/default/train/*.parquet`
- `hf://datasets/ibm/duorc@~parquet/ParaphraseRC/test/*.parquet`

The `@~parquet` revision provides auto-converted Parquet files for any dataset format.

#### Imported: Useful DuckDB SQL Functions

```sql
-- String functions
LENGTH(column)                    -- String length
regexp_replace(col, '\n', '')     -- Regex replace
regexp_matches(col, 'pattern')    -- Regex match
LOWER(col), UPPER(col)           -- Case conversion

-- Array functions
choices[0]                        -- Array indexing (0-based)
array_length(choices)             -- Array length
unnest(choices)                   -- Expand array to rows

-- Aggregations
COUNT(*), SUM(col), AVG(col)
GROUP BY col HAVING condition

-- Sampling
USING SAMPLE 10                   -- Random sample
USING SAMPLE 10 (RESERVOIR, 42)   -- Reproducible sample

-- Window functions
ROW_NUMBER() OVER (PARTITION BY col ORDER BY col2)
```

---

# Dataset Creation (dataset_manager.py)

### Recommended Workflow

**1. Discovery (Use HF MCP Server):**
```python
# Use HF MCP tools to find existing datasets
search_datasets("conversational AI training")
get_dataset_details("username/dataset-name")
```

**2. Creation (Use This Skill):**
```bash
# Initialize new dataset
uv run scripts/dataset_manager.py init --repo_id "your-username/dataset-name" [--private]

# Configure with detailed system prompt
uv run scripts/dataset_manager.py config --repo_id "your-username/dataset-name" --system_prompt "$(cat system_prompt.txt)"
```

**3. Content Management (Use This Skill):**
```bash
# Quick setup with any template
uv run scripts/dataset_manager.py quick_setup \
  --repo_id "your-username/dataset-name" \
  --template classification

# Add data with template validation
uv run scripts/dataset_manager.py add_rows \
  --repo_id "your-username/dataset-name" \
  --template qa \
  --rows_json "$(cat your_qa_data.json)"
```

### Template-Based Data Structures

**1. Chat Template (`--template chat`)**
```json
{
  "messages": [
    {"role": "user", "content": "Natural user request"},
    {"role": "assistant", "content": "Response with tool usage"},
    {"role": "tool", "content": "Tool response", "tool_call_id": "call_123"}
  ],
  "scenario": "Description of use case",
  "complexity": "simple|intermediate|advanced"
}
```

**2. Classification Template (`--template classification`)**
```json
{
  "text": "Input text to be classified",
  "label": "classification_label",
  "confidence": 0.95,
  "metadata": {"domain": "technology", "language": "en"}
}
```

**3. QA Template (`--template qa`)**
```json
{
  "question": "What is the question being asked?",
  "answer": "The complete answer",
  "context": "Additional context if needed",
  "answer_type": "factual|explanatory|opinion",
  "difficulty": "easy|medium|hard"
}
```

**4. Completion Template (`--template completion`)**
```json
{
  "prompt": "The beginning text or context",
  "completion": "The expected continuation",
  "domain": "code|creative|technical|conversational",
  "style": "description of writing style"
}
```

**5. Tabular Template (`--template tabular`)**
```json
{
  "columns": [
    {"name": "feature1", "type": "numeric", "description": "First feature"},
    {"name": "target", "type": "categorical", "description": "Target variable"}
  ],
  "data": [
    {"feature1": 123, "target": "class_a"},
    {"feature1": 456, "target": "class_b"}
  ]
}
```

### Advanced System Prompt Template

For high-quality training data generation:
```text
You are an AI assistant expert at using MCP tools effectively.

#### Imported: MCP SERVER DEFINITIONS

[Define available servers and tools]

#### Imported: Limitations

- Use this skill only when the task clearly matches the scope described above.
- Do not treat the output as a substitute for environment-specific validation, testing, or expert review.
- Stop and ask for clarification if required inputs, permissions, safety boundaries, or success criteria are missing.