snowctl

snowctl is a cursor rule for coding agents from sfc-gh-cconner/support-rules-mcp. It costs 1,612 tokens per session, scanned A, original, Apache-2.0.

A guide for investigating Snowflake’s container-cluster runtime, including cluster agents, networking, outbound traffic, and access rules. It uses GitHub’s code search interface to find relevant code in the snowctl repository.

In plain words
What is it for?
Use it to investigate node and pod lifecycle issues, health checks, container networking, IP assignment, network policies, and firewall rules.
Why use it?
It helps locate the source code behind cluster and network problems without guessing where the relevant implementation lives.

Cursor rule

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.

agentmods
npx agentmods add rules/sfc-gh-cconner/support-rules-mcp/snowctl
Clone the repo
git clone --depth 1 https://github.com/sfc-gh-cconner/support-rules-mcp

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 snowctl

README.md
[![agentmods](https://agentmods.dev/badge/rules/sfc-gh-cconner/support-rules-mcp/snowctl.svg)](https://agentmods.dev/rules/sfc-gh-cconner/support-rules-mcp/snowctl)
Your own site
<a href="https://agentmods.dev/rules/sfc-gh-cconner/support-rules-mcp/snowctl"><img src="https://agentmods.dev/badge/rules/sfc-gh-cconner/support-rules-mcp/snowctl.svg" alt="Measured on agentmods" height="20"></a>
Per session 1,612 This file is loaded in full into every session.
When invoked 1,612 The same file — it is already loaded in full.
Security scan A 0 findings. Scan, not verified.
Origin original 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 $0.01612 $0.01612
Opus 5 $0.00806 $0.00806
Sonnet 5 $0.00322 $0.00322
Haiku 4.5 $0.00161 $0.00161

Measured 4d ago against content hash cbfd4f492a2a, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

snowctl 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 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.

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.

rules/spcs/snowctl.mdc · 290 lines

How it starts

The opening of the file, as written. The whole thing — 290 lines — stays where its author put it; the contents beside it link to each section on GitHub.

SPCS Cluster Runtime (snowctl) Investigation Guide

PURPOSE: Snowctl patterns for SPCS cluster runtime agents, CNI, egress, and policy enforcement.

Access Method: GitHub MCP API tools
Repository: snowflakedb/snowctl

🔍 Quick Investigation Patterns

Cluster Agent Issues

# Search for agent implementations
mcp_github_search_code(
    query='agent OR kubelet repo:snowflakedb/snowctl'
)

# Node management
mcp_github_search_code(
    query='NodeController OR nodeManager repo:snowflakedb/snowctl'
)

# Pod lifecycle
mcp_github_search_code(
    query='PodController OR podLifecycle repo:snowflakedb/snowctl'
)

# Health checks
mcp_github_search_code(
    query='healthz OR liveness OR readiness repo:snowflakedb/snowctl'
)

CNI (Container Network Interface)

# CNI implementation
mcp_github_search_code(
    query='path:cni OR CNI repo:snowflakedb/snowctl'
)

# Network policies
mcp_github_search_code(
    query='NetworkPolicy OR netpol repo:snowflakedb/snowctl'
)

# IP allocation
mcp_github_search_code(
    query='IPAM OR ipAllocation repo:snowflakedb/snowctl'
)

# iptables rules
mcp_github_search_code(
    query='iptables OR netfilter repo:snowflakedb/snowctl'
)

Egress and Networking

# Egress proxy
mcp_github_search_code(
    query='egress OR EgressProxy repo:snowflakedb/snowctl'
)

# External access
mcp_github_search_code(
    query='ExternalAccess OR outbound repo:snowflakedb/snowctl'
)

# DNS configuration
mcp_github_search_code(
    query='dns OR resolver repo:snowflakedb/snowctl'
)

# Service mesh
mcp_github_search_code(
    query='envoy OR istio repo:snowflakedb/snowctl'
)

Storage Management

# Volume management
mcp_github_search_code(
    query='Volume OR PersistentVolume repo:snowflakedb/snowctl'
)

# Block storage
mcp_github_search_code(
    query='BlockStorage OR disk repo:snowflakedb/snowctl'
)

# Mount operations
mcp_github_search_code(
    query='mount OR filesystem repo:snowflakedb/snowctl'
)

Read the full file on GitHub · 290 lines

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. 4d ago First seen · 290 lines · 1,612 tokens per session scan A cbfd4f492a2a

Subscribe to this mod's changes

snowctl is a cursor rule published in the GitHub repository sfc-gh-cconner/support-rules-mcp (0 stars, last pushed 10mo ago), licensed Apache-2.0. It adds 1,612 tokens to every session, about $0.0081 per session on Opus 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 2026-08-31.