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rails-security-multitenancy

rails-security-multitenancy is a skill for Claude Code from marckohlbrugge/37signals-skills. It costs 50 tokens per session (1,493 once invoked), scanned A, original, no licence file.

A set of Rails guidelines for protecting accounts, webhooks, and data belonging to separate customers in one application.

In plain words
What is it for?
Use it when adding authentication, tenant-specific queries, webhooks, rate limits, or real-time updates that must stay within a customer's account.
Why use it?
It helps prevent one customer from accessing another customer's data and reduces common risks such as forged requests to internal services or uncontrolled request volume.

Skill for Claude Code

Written for Claude Code: disable-model-invocation in frontmatter.

not rated 731repo +1 5mo ago A scan 50 tokens no licence

Good fit Use it when adding authentication, tenant-specific queries, webhooks, rate limits, or real-time updates that must stay within a customer's account.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/marckohlbrugge/37signals-skills/rails-security-multitenancy
View source ↗ marckohlbrugge/37signals-skills
Install

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.

Any agent
npx skills add marckohlbrugge/37signals-skills --skill rails-security-multitenancy
Clone the repo
git clone --depth 1 https://github.com/marckohlbrugge/37signals-skills

Made for: Claude Code.

Wrote 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.

agentmods badge for rails-security-multitenancy

README.md
[![agentmods](https://agentmods.dev/badge/skills/marckohlbrugge/37signals-skills/rails-security-multitenancy/github.svg)](https://agentmods.dev/skills/marckohlbrugge/37signals-skills/rails-security-multitenancy)
Your own site
<a href="https://agentmods.dev/skills/marckohlbrugge/37signals-skills/rails-security-multitenancy"><img src="https://agentmods.dev/badge/skills/marckohlbrugge/37signals-skills/rails-security-multitenancy/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for rails-security-multitenancy

Your own site · 80×15
<a href="https://agentmods.dev/skills/marckohlbrugge/37signals-skills/rails-security-multitenancy"><img src="https://agentmods.dev/badge/skills/marckohlbrugge/37signals-skills/rails-security-multitenancy.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 50 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,493 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00050 $0.01493
Opus 5.5 $0.00020 $0.00597
Sonnet 5.5 $0.00010 $0.00299
Haiku 4.5 $0.00005 $0.00149

Measured 2mo ago against content hash f3fd1c899cbb, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

rails-security-multitenancy scanned grade A with 0 findings 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 2mo 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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/rails-security-multitenancy/SKILL.md · 106 lines

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.

Read it on GitHub

Changes

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.

  1. 2mo ago First seen · 106 lines · 50 tokens per session scan A f3fd1c899cbb

Subscribe to this mod's changes

rails-security-multitenancy is a skill published in the GitHub repository marckohlbrugge/37signals-skills (731 stars, last pushed 5mo ago), with no licence file. It adds 50 tokens to every session and 1,493 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Backend and APIsSecurity
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