calculator SKILL.md skillA
calculator from exboys/skilllite is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add exboys/skilllite/calculator@v1.0Pins v1.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- exboys/skilllite
- Path
.skills/calculator/SKILL.md- Versions recorded
- 3
- Latest version
- v1.0, committed Mar 1, 2026
- First version recorded
- Jan 31, 2026
- Size
- 680 bytes
- Repository stars
- 151
- License
- MIT
A simple calculator that can add, subtract, multiply, and divide numbers. Use when the user needs to perform basic arithmetic operations.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Calculator Skill
A simple calculator that performs basic arithmetic operations.
## Usage
Provide an operation and two numbers to get the result.
### Examples
- Add: `{"operation": "add", "a": 5, "b": 3}` → `8`
- Subtract: `{"operation": "subtract", "a": 10, "b": 4}` → `6`
- Multiply: `{"operation": "multiply", "a": 6, "b": 7}` → `42`
- Divide: `{"operation": "divide", "a": 20, "b": 4}` → `5`Read the whole file at its exact version.
How to install
mdr add exboys/skilllite/calculator@sha256:d1649328ecf8e9a8The line at the top of this page pins the label v1.0, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_5ycv2tnbphjqniwc)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Jan 31, 2026 and Mar 1, 2026, about one every 14 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v1.0 latest | 2026-03-01 | 03ecbe9 | 680 B | A | view · diff |
| v1.0 | 2026-02-03 | 2e4d764 | 649 B | A | view · diff |
| v1.0 | 2026-01-31 | 91e079b | 1,023 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (680 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
exboys/skilllite · 151 stars · license MIT · pushed 2026-11-02 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_5ycv2tnbphjqniwc GET https://markdownregistry.com/api/v1/resolve?ref=exboys/skilllite/calculator GET https://markdownregistry.com/api/v1/blob/d1649328ecf8e9a8735430858c32faf70c8791e8830f696d2781d48d4316b27a
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.
More from exboys/skilllite
Every file in exboys/skilllite