ruler

MCP server · GitHub · ★ 3k · graded 2026-10-22Source linked

Ruler — apply the same rules to all coding agents

No outside reports on file

ruler is distributed via GitHub (intellectronica/ruler); review its source code, dependencies, and requested permissions before use.

Based on public adoption and transparency signals as of Oct 21, 2026. Our opinion, not a code audit or security guarantee.

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What it can access

Local filesNo local folder access notedLOW
Command executionRuns shell or system commandsREVIEW
Network reachConnects to outside service APINOTED
CredentialsNo API token requiredLOW
Package sourceGitHub (intellectronica/ruler)PUBLIC

Inferred from this listing’s public package details and description. Check the project’s source before installing.

Install

No npm or PyPI package is listed. Install from source: github.com/intellectronica/ruler ↗

All setup options ↓

Check this skill Watch it in my stack Compare README badge View project

Everything known

We found nothing about this project in the sources we read (last checked 2026-10-30). That does not mean it has no problems.

0 incidents · 0 advisories · 0 news articles · 9 community threads · checked 2026-10-30

Popularity grade: C (from public signals such as stars and downloads, not a code review). Graded 2026-10-22.

All (9)Community (9)

Showing all 9Showing 9 community threads of 9

CommunityDoes ruler apply merge global and project-local instructions?AgentArmorHQ community · 2026-10-26
CommunityDoes ruler support Amp, and where does it store rules?AgentArmorHQ community · 2026-10-26
CommunityHow can ruler support Roo Code .roorules / .roo/rules/* config files?AgentArmorHQ community · 2026-10-26
CommunityHow do I stop ruler apply from creating .bak backup files?AgentArmorHQ community · 2026-10-26
CommunityRuler 0.3.0–0.3.6 writes type:stdio instead of source:custom in .zed/settings.jsonAgentArmorHQ community · 2026-10-26
CommunityRuler generates backslashes on Windows, breaks Linux CI sync checkAgentArmorHQ community · 2026-10-26
CommunityRuler skills propagation ignores default_agents and --agents filteringAgentArmorHQ community · 2026-10-26
Communityruler: `nested = true` ignored and `--nested` skips MCP config generationAgentArmorHQ community · 2026-10-26
CommunityTrae AI in ruler: where are project rules and mcp.json stored?AgentArmorHQ community · 2026-10-26

Sources we read: OSV, GitHub Advisory Database, CISA Known Exploited Vulnerabilities, 44 security news feeds and our incident library. Last checked 2026-10-30.

Check a specific version →

About Ruler

Ruler is an MCP server focused on General: Ruler — apply the same rules to all coding agents.

It is hosted on GitHub at intellectronica/ruler (2,952 GitHub stars). Based on its public metadata, it operates with standard local or API scope without broad shell execution flags noted.

Setup

Check these steps against the project’s own instructions before running anything.

No standalone npm or PyPI package is listed for this MCP server. Clone and inspect the source repository directly:

bash

git clone https://github.com/intellectronica/ruler.git

Review the README and source files in https://github.com/intellectronica/ruler (opens external site) before running any setup commands.

Why this grade

CC — Moderate risk signals

Signal-based grade (3/7 points): well starred on GitHub, public source code. This reflects adoption and transparency, not a code review.

Popularity and upkeep

38/100

GitHub stars: 3k
Listing last refreshed: 2026-10-30

These are public popularity signals, not a maintenance check. Look at the repository’s commit history and open issues.

Risks to watch for

Dependency & version pinning: Distributed via GitHub (intellectronica/ruler). Pin an exact release version or commit SHA rather than floating tags so upstream updates are reviewed first.

How to lower the risk

Least-privilege permissions

Give it access only to the specific folders, accounts or projects it needs, never your whole drive or admin account.
Use a separate, limited API key or login just for this tool so you can switch it off without affecting anything else.

Network isolation

Run it on a work computer or sandbox account, not one holding personal or company-sensitive data.
If your IT team can, limit which websites and services it is allowed to contact.

Monitoring

Check its activity history or logs weekly at first, and look at what it changed or sent.
Turn on alerts for new logins or unusual usage on any account it connects to.

Red flags to watch for

It asks for more access than its job requires, or prompts you to paste passwords.
It suddenly updates with new owners, or starts contacting unfamiliar websites.

Questions

How do I install Ruler?

Ruler does not publish a standalone npm or PyPI package. Clone or follow the setup instructions in its source repository at github.com/intellectronica/ruler.

Are there security reports about Ruler?

No reports found for this package in our research (last checked 2026-10-30). Ruler currently holds Grade C (Moderate risk signals) based on public adoption and transparency signals. Key risk areas to watch include dependency & version pinning:.

Is Ruler actively maintained?

Ruler has 3k GitHub stars. Our directory data was last refreshed on 2026-10-30. Check recent commit activity, release tags, and open issues at github.com/intellectronica/ruler before pinning it in production.

What are alternatives to Ruler?

Compare Ruler side by side with similar MCP servers in the Related tools section on this page, or browse all MCP servers on AgentArmorHQ.

Maintain or use Ruler? Show its live grade in your GitHub README, docs site, or run a check from the terminal before you install.

GitHub README Markdown:

markdown

[![AgentArmorHQ Risk Grade for Ruler](https://agentarmorhq.com/api/badge/intellectronica-ruler)](https://agentarmorhq.com/skills/intellectronica-ruler)

HTML embed:

html

<a href="https://agentarmorhq.com/skills/intellectronica-ruler"><img src="https://agentarmorhq.com/api/badge/intellectronica-ruler" alt="AgentArmorHQ Risk Grade for Ruler" height="20" /></a>

Terminal check:

terminal

curl -fsSL https://agentarmorhq.com/api/cli | node --input-type=module - check "intellectronica-ruler"

Share with your security lead

Need sign-off to use ruler? Copy this note for Slack, a ticket or a pull request.

### AgentArmorHQ Security Review Memo: ruler
- **Listing URL:** https://agentarmorhq.com/skills/intellectronica-ruler
- **Type:** App connector
- **Risk Grade:** Grade C (Moderate risk signals)
- **Outside Security Advisories on File:** 0
- **Public Adoption:** 3k GitHub stars

#### Permission & Blast-Radius Signals
- **Local files:** No local folder access noted
- **Command execution:** Runs shell or system commands
- **Network reach:** Connects to outside service API
- **Credentials:** No API token required
- **Package source:** GitHub (intellectronica/ruler)

#### Recommended Hardened Setup
- **Source Repo:** https://github.com/intellectronica/ruler
- **Controls:** Pin an exact version in `.mcp.json`, scope access to a single workspace folder, and use a least-privilege read-only token where supported.

_Based on public adoption and transparency signals as of Oct 21, 2026. Our opinion, not a code audit or security guarantee._

Key facts

Type: App connector
Publisher: intellectronica
Source code: github.com/intellectronica/ruler
Est. context load: ~500 tokens / turn (~3 tool schemas, 0.25% of 200k context)
Popularity: 3k GitHub stars
Last updated: 2026-10-30
Last graded: 2026-10-22

Community

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