# Cost Mom Trends

> Month-over-month cost trends for the active Glassity tenant. Read-only. Use when the user asks "is my cost trending up", "MoM cost change", "month-over-month trend for my AWS spend".

- **Type:** Skill
- **Install:** `agentstack add skill-glassity-agent-skills-cost-mom-trends`
- **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior
- **Seller:** [glassity](https://agentstack.voostack.com/s/glassity)
- **Installs:** 0
- **Category:** [Cloud & Infrastructure](https://agentstack.voostack.com/c/cloud-infrastructure)
- **Latest version:** 0.1.0
- **License:** Apache-2.0
- **Upstream author:** [glassity](https://github.com/glassity)
- **Source:** https://github.com/glassity/agent-skills/tree/main/skills/cost-mom-trends

## Install

```sh
agentstack add skill-glassity-agent-skills-cost-mom-trends
```

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

## About

# Month-over-month cost trends

## When to use

- "Is our cost trending up", "MoM change"
- "Show me the last 6 months of spend"

## Binary check

Run `command -v glassity` before the first CLI call. If it is missing, stop and
tell the user to install it with `brew install glassity/tap/glassity` or from
. No account yet? Sign up at
[app.glassity.cloud](https://app.glassity.cloud/users/sign_in?utm_source=github&utm_medium=referral&utm_campaign=agent-skills).

## Invocation

```bash
glassity --output=json cost mom-trends \
  [--start-date YYYY-MM-DD] [--end-date YYYY-MM-DD] \
  [--aws-account-id 123456789012]
```

`--end-date` is **exclusive** — the window ends the day before it. For a
full month, pass the first of the *next* month (a July window is `--start-date
YYYY-07-01 --end-date YYYY-08-01`); an end date of the 31st silently drops
that day.

## Surface

- The active tenant, which the CLI prints on stderr
- Any month with a swing over 10 percent — call it out explicitly

## Source & license

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

- **Author:** [glassity](https://github.com/glassity)
- **Source:** [glassity/agent-skills](https://github.com/glassity/agent-skills)
- **License:** Apache-2.0

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-glassity-agent-skills-cost-mom-trends
- Seller: https://agentstack.voostack.com/s/glassity
- 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%.