calculator SKILL.md skillA
calculator from nvidia/skillevaluator is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add nvidia/skillevaluator/calculator@git:20260801.fdf3ea4Pins git:20260801.fdf3ea4 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- nvidia/skillevaluator
- Path
src/skillevaluator/tier3/reference_skills/calculator/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260801.fdf3ea4, committed Aug 1, 2026
- First version recorded
- Jul 26, 2026
- Size
- 1,765 bytes
- Repository stars
- 618
- License
- Apache-2.0
Evaluate mathematical expressions and unit conversions. Handles arithmetic, percentages, exponents, and common unit conversions (temperature, distance, weight). No external dependencies.
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 Evaluate math expressions and perform unit conversions from the command line. ## Purpose Provide a safe, sandboxed calculator for arithmetic expressions and common unit conversions without relying on `eval()` or external services. ## Agent Instructions 1. Read this SKILL.md to understand capabilities. 2. Run `scripts/calc.py` with the user's expression or conversion. 3. Return the computed result to the user. ## Examples ### Usage ```bash # Arithmetic expressions python scripts/calc.py "2 + 3 * 4" python scripts/calc.py "(100 - 25) / 3" python scripts/calc.py "2 ** 10" # Percentage calculations python scripts/calc.py "15% of 200" # Unit conversions python scripts/calc.py "100 celsius to fahrenheit" python scripts/calc.py "5 miles to km" python scripts/calc.py "10 kg to lbs" ``` ### Output A single line with the result, e.g.: ``` Result: 14 ``` For conversions: ``` 100 celsius = 212.0 fahrenheit ``` ## Limitations - No symbolic algebra (no variables, no equations). - Only supports basic arithmetic operators: `+`, `-`, `*`, `/`, `**`, `%`, parentheses. - Unit conversions are limited to: celsius/fahrenheit, miles/km, kg/lbs, meters/feet. …
Read the whole file at its exact version.
How to install
mdr add nvidia/skillevaluator/calculator@sha256:0dabd9b8981662f6The line at the top of this page pins the label git:20260801.fdf3ea4, 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_v7cy4sjkd4v6go3l)
5 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Jul 26, 2026 and Aug 1, 2026, about one every 6 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260801.fdf3ea4 latest | 2026-08-01 | fdf3ea4 | 1,765 B | A | view · diff |
| git:20260726.6a1bc57 | 2026-07-26 | 6a1bc57 | 1,766 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 (1765 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
nvidia/skillevaluator · 618 stars · license Apache-2.0 · pushed 2026-11-01 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_v7cy4sjkd4v6go3l GET https://markdownregistry.com/api/v1/resolve?ref=nvidia/skillevaluator/calculator GET https://markdownregistry.com/api/v1/blob/0dabd9b8981662f655441dd91a33945218f8e8232f478d608216ed5ad3b20463
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.
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