OpenAgentSkillRegistry

Browse All Skills AI Skill Finder Use Cases Packs Compare

Gallery Rankings Creators

Blog Guides Reports

Docs Agent Entry API CLI

Star200+Submit Skill

Loading the next page

calculator Audit Report | OpenAgentSkill | OpenAgentSkill

OpenAgentSkillRegistry

Browse All Skills AI Skill Finder Use Cases Packs Compare

Gallery Rankings Creators

Blog Guides Reports

Docs Agent Entry API CLI

Star200+Submit Skill

Skills/calculator/Audit

Skill audit report

calculator Audit report.

A simple calculator that can add, subtract, multiply, and divide numbers. Use when the user needs to perform basic arithmetic operations.

REVIEWED · REVIEWNeeds reviewGenerated Sep 17, 2026Heuristic metadata audit

82

Audit

75

Trust

75

Quality

84

Security

100

Maintain

92

Install

OpenAgentSkill Trust Score

75

The skill layer for AI agents: discover, compare, audit, and install reusable capabilities across Codex, Claude Code, Cursor, and agent runtimes.

Explore

Skills Gallery New submissions Agent Skills

More links

What Is an Agent Skill?AI Agent Skills Tasks Packs Best Skills New & Trending Workflow Recipes Use Cases Agents Agent Entry

Trust

Compare Safety Gate Skills Registry Rankings

More links

Outcome Loop Audits Official Weekly Reports Monthly Index State of Agent Skills vs skills.sh AgentSkills.io Alternative

Build

Docs About Contact API

More links

llms.txt OpenAPI CLI Creator Kit Skill Creators X Growth Kit Submit Blog Guides Activity

OpenAgentSkill Registry

Privacy ContactBuilt for agent-native discovery

Strong shortlist

OpenAgentSkill Trust Score

The Trust Score helps an agent decide whether a skill is safe enough to shortlist before installation.

GitHub adoption

INFO

76

665 GitHub stars

Stars/forks activity

INFO

71

665 stars, 64 forks; issue activity unavailable in current metadata

Recent maintenance

PASS

100

24d since push

License clarity

PASS

86

MIT

README/SKILL.md completeness

PASS

86

Metadata includes enough usage and workflow context

Dependency/runtime risk

PASS

90

no major dependency risk hints in public metadata

Install availability

PASS

92

npx skills add EXboys/evotown --skill calculator

Install command safety

PASS

92

standard package or runtime install path

Permission surface

PASS

100

no high-risk permission surface in public metadata

Repository evidence

PASS

86

https://github.com/EXboys/evotown/tree/main/backend/arena_skills/calculator

Review status

INFO

66

AI review data available

Agent Proven outcomes

INFO

54

No agent outcome data yet

Checks

Install and adoption review

9 Passed · 7 Needs review

Install path

92

PASS

npx skills add EXboys/evotown --skill calculator

Repository

88

PASS

https://github.com/EXboys/evotown/tree/main/backend/arena_skills/calculator

License

86

PASS

MIT

Maintenance

100

PASS

24d since push

AI review

55

CHECK

main.py does not handle malformed JSON or non-numeric inputs gracefully; json.loads() and float() can raise uncaught exceptions and crash with a traceback.

README/SKILL.md completeness

86

PASS

Usable description available

Dependency risk

90

PASS

no major dependency risk hints in public metadata

Install command safety

92

PASS

standard package or runtime install path

Permission surface

100

PASS

no high-risk permission surface in public metadata

Stars/forks activity

71

CHECK

665 stars, 64 forks; issue activity unavailable in current metadata

Adoption

88

PASS

665 GitHub stars

Warnings

main.py does not handle malformed JSON or non-numeric inputs gracefully; json.loads() and float() can raise uncaught exceptions and crash with a traceback.
Input validation is minimal: missing fields default to add/0, which can silently produce results instead of reporting invalid requests.
SKILL.md does not document error behavior, limitations, or the exact output format beyond simple examples.
float() accepts non-finite values like Infinity/NaN in some JSON inputs, which could lead to misleading results.
Quality score needs review

Method

This report combines public metadata, AI review output, repository freshness, install readiness, OpenAgentSkill events, quality scoring, trust checks, and the agent safety gate. It is not a full source-code security review.

Install path

Review the report before installing into production agents.

$ npx skills add EXboys/evotown --skill calculator

Agent-readable metadata

Machine decision packet

Embedded JSON exposes suited tasks, suited agents, install command, trust score, safety gate, alternatives, and do-not-use conditions for agent review.

Install policy: review
Best agents: Codex + Claude Code
Alternatives: 3

Open agent JSON

Signals

Audit score: 82/100
Quality: 75/100
Trust: 75/100
Install safety: 92/100
Permission surface: 100/100
Maintenance: 24d since push
Events: No events yet
GitHub stars: 665
Last push: Aug 24, 2026

Agent safety v2

70/100 · Review before install

Reviewed with permission notesreview

Usable candidate, but the agent should surface permission and audit notes before installation.

Require human approval before installing into a real workspace.

main.py does not handle malformed JSON or non-numeric inputs gracefully; json.loads() and float() can raise uncaught exceptions and crash with a traceback.
70/100 agent safety score

Network access

medium

Skill likely fetches remote pages, APIs, repositories, or external services.

main.py does not handle malformed JSON or non-numeric inputs gracefully; json.loads() and float() can raise uncaught exceptions and crash with a traceback.

Back to skill Alternatives Audit badge SVG

Compare nearby options

Related skills to audit next

UI-TARS Desktop

Run multimodal agents that operate desktop interfaces

37K Stars · Audit report

n8n

Connect agents to hundreds of workflow automations

194K Stars · Audit report

MoneyPrinterTurbo

利用AI大模型，一键生成高清短视频 Generate short videos with one click using AI LLM.

89K Stars · Audit report