# Add Cart Discount

> Add per-item discount support to the cart total

- **Type:** Skill
- **Install:** `agentstack add skill-zernie-vigiles-cart-discount`
- **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior
- **Seller:** [zernie](https://agentstack.voostack.com/s/zernie)
- **Installs:** 0
- **Category:** [Developer Tools](https://agentstack.voostack.com/c/developer-tools)
- **Latest version:** 0.1.0
- **License:** MIT
- **Upstream author:** [zernie](https://github.com/zernie)
- **Source:** https://github.com/zernie/vigiles/tree/main/bench/tasks/cart-discount
- **Website:** https://vigiles.sh

## Install

```sh
agentstack add skill-zernie-vigiles-cart-discount
```

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

## About

# Add per-item discounts

`total(items)` in `src/cart.js` sums `price * qty` across the cart.

Add support for an optional `discount` field on an item — a percentage off
that item's line total. For example an item `{ price: 100, qty: 1, discount: 10 }`
contributes `90`. Items without a `discount` field are unaffected.

The behaviour is covered by the tests under `test/`.

## Source & license

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

- **Author:** [zernie](https://github.com/zernie)
- **Source:** [zernie/vigiles](https://github.com/zernie/vigiles)
- **License:** MIT
- **Homepage:** https://vigiles.sh

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-zernie-vigiles-cart-discount
- Seller: https://agentstack.voostack.com/s/zernie
- 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%.