Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add rules/twells89/sigma-skills/sigma-apigit clone --depth 1 https://github.com/twells89/sigma-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/rules/twells89/sigma-skills/sigma-api)<a href="https://agentmods.dev/rules/twells89/sigma-skills/sigma-api"><img src="https://agentmods.dev/badge/rules/twells89/sigma-skills/sigma-api.svg" alt="Measured on agentmods" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00103 | $0.02392 |
| Opus 5 | $0.00051 | $0.01196 |
| Sonnet 5 | $0.00021 | $0.00478 |
| Haiku 4.5 | $0.00010 | $0.00239 |
Grade A, and why
sigma-api scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 4d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
description: "Authenticate against the Sigma Computing REST API and obtain a bearer token. Use whenever the user wants to call the Sigma API directly with curl/HTTP, exchange OAuth client credentials for an access token, The source is not reproduced here
No licence file
A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 4d ago First seen · 148 lines · 103 tokens per session scan A 6c45c0b3f757
sigma-api is a cursor rule published in the GitHub repository twells89/sigma-skills (12 stars, last pushed 6d ago), with no licence file. It adds 103 tokens to every session and 2,392 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other cursor rules, from other repositories
webkit-browser
Cursor rule "webkit-browser" from duckduckgo/apple-browsers, covering webkit & browser development guidelines, webview configuration, basic webview setup, user scripts management and tab management.
github-content
When accessing content from GitHub repositories, ALWAYS use GitHub MCP tools instead of web scraping, Firecrawl, or other methods.
vasu-playwright-utils
../../templates/cursor-rules/vasu-playwright-utils.mdc.
vla-registry
Multi-model GUI/VL registry — browser wllama grounding (ShowUI-2B is default + E2E gate).
dev-browser
Fallback browser automation with persistent Chrome state. Use only when Browser Use is unavailable or blocked.
scrapy
Cursor rule "scrapy" from Solihatun1/AI-Cursor-Scraping-Assistant, covering scrapy best practices, 1. code organization and structure, 1.1. directory structure, 1.2. file naming conventions and 1.3. module organization.