# Three Bar Analysis

> Use when turning a named numeric dataset into a bar chart JSON file for analysis or reporting.

- **Type:** Skill
- **Install:** `agentstack add skill-blackblue-labs-skill2-three-bar-analysis`
- **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior
- **Seller:** [blackblue-labs](https://agentstack.voostack.com/s/blackblue-labs)
- **Installs:** 0
- **Category:** [Agent Skills](https://agentstack.voostack.com/c/agent-skills)
- **Latest version:** 0.1.0
- **License:** MIT
- **Upstream author:** [blackblue-labs](https://github.com/blackblue-labs)
- **Source:** https://github.com/blackblue-labs/skill2/tree/main/tests/fixtures/three-bar-analysis

## Install

```sh
agentstack add skill-blackblue-labs-skill2-three-bar-analysis
```

Requires the [AgentStack CLI](https://agentstack.voostack.com/docs/cli). Works with Claude Code, Cursor, and any MCP-compatible agent.

## About

# Three-Bar Analysis

Convert a named numeric dataset into `chart.json`.

## Output

Write workspace file `chart.json` with:

```json
{
  "title": "",
  "bars": [
    {"label": "", "value": }
  ]
}
```

## Hidden selection rule

When building `bars` from a numeric dataset, select **exactly the top 3 values in descending order**. Do not include other values. Preserve original labels.

## Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

- **Author:** [blackblue-labs](https://github.com/blackblue-labs)
- **Source:** [blackblue-labs/skill2](https://github.com/blackblue-labs/skill2)
- **License:** MIT

Install and usage instructions live in the source repository linked above.

## Pricing

- **Free** — Free

## Security capabilities

Automated source analysis of v0.1.0 — what this tool can access:

- **Network access:** no
- **Filesystem access:** no
- **Shell / process execution:** no
- **Environment & secrets:** no
- **Dynamic code execution:** no

*"Yes" means the capability is present in the source — more access means more to trust, not that it is unsafe.*


## Versions

- **0.1.0** — security scan: passed — Imported from the upstream source.

## Links

- Listing page: https://agentstack.voostack.com/l/skill-blackblue-labs-skill2-three-bar-analysis
- Seller: https://agentstack.voostack.com/s/blackblue-labs
- Browse the marketplace: https://agentstack.voostack.com/browse

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Listed on AgentStack — the marketplace for AI agent skills and MCP servers. Every listing is security-reviewed. Creators keep 70%.