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 skills add BagelHole/DevOps-Security-Agent-Skills --skill aws-vpcgit clone --depth 1 https://github.com/BagelHole/DevOps-Security-Agent-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/skills/bagelhole/devops-security-agent-skills/aws-vpc)<a href="https://agentmods.dev/skills/bagelhole/devops-security-agent-skills/aws-vpc"><img src="https://agentmods.dev/badge/skills/bagelhole/devops-security-agent-skills/aws-vpc.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 5.1 | $0.00032 | $0.04638 |
| Opus 5 | $0.00016 | $0.02319 |
| Sonnet 5 | $0.00006 | $0.00928 |
| Haiku 4.5 | $0.00003 | $0.00464 |
Grade A, and why
aws-vpc 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 3d 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.
How it starts
The opening of the file, as written. The whole thing — 421 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AWS VPC
Design and manage Virtual Private Cloud networking for production AWS environments with proper subnet isolation, routing, and security.
When to Use This Skill
- Building a new VPC for production, staging, or development
- Setting up public/private subnet architecture across multiple AZs
- Configuring NAT Gateways for private subnet internet access
- Creating security groups and NACLs for network segmentation
- Setting up VPC peering or Transit Gateway for multi-VPC connectivity
- Implementing VPC endpoints for private access to AWS services
- Troubleshooting connectivity issues between resources
Prerequisites
- AWS CLI v2 installed and configured
- IAM permissions:
ec2:*(or scoped to VPC-related actions) - CIDR range planning completed (avoid overlaps with on-premises or other VPCs)
- For VPC peering: access to both VPCs (same or different accounts)
Network Architecture
VPC (10.0.0.0/16) - 65,536 IPs
├── Public Subnets (internet-facing via IGW)
│ ├── 10.0.1.0/24 (us-east-1a) - 256 IPs - ALBs, NAT GW, bastion
│ ├── 10.0.2.0/24 (us-east-1b) - 256 IPs
│ └── 10.0.3.0/24 (us-east-1c) - 256 IPs
├── Private Subnets (app tier, NAT GW for outbound)
│ ├── 10.0.11.0/24 (us-east-1a) - 256 IPs - ECS, EC2, Lambda
│ ├── 10.0.12.0/24 (us-east-1b) - 256 IPs
│ └── 10.0.13.0/24 (us-east-1c) - 256 IPs
├── Data Subnets (isolated, no internet)
│ ├── 10.0.21.0/24 (us-east-1a) - 256 IPs - RDS, ElastiCache
│ ├── 10.0.22.0/24 (us-east-1b) - 256 IPs
│ └── 10.0.23.0/24 (us-east-1c) - 256 IPs
├── Internet Gateway
├── NAT Gateways (one per AZ for HA)
├── Route Tables (public, private, data)
└── VPC Flow Logs → CloudWatch / S3
Create a VPC with CLI
# Create the VPC
VPC_ID=$(aws ec2 create-vpc \
--cidr-block 10.0.0.0/16 \
--tag-specifications 'ResourceType=vpc,Tags=[{Key=Name,Value=production-vpc},{Key=Environment,Value=production}]' \
--query 'Vpc.VpcId' --output text)
# Enable DNS support and hostnames
aws ec2 modify-vpc-attribute --vpc-id $VPC_ID --enable-dns-support '{"Value":true}'
aws ec2 modify-vpc-attribute --vpc-id $VPC_ID --enable-dns-hostnames '{"Value":true}'
# Create public subnets
PUB_SUB_A=$(aws ec2 create-subnet \
--vpc-id $VPC_ID \
--cidr-block 10.0.1.0/24 \
--availability-zone us-east-1a \
--tag-specifications 'ResourceType=subnet,Tags=[{Key=Name,Value=public-a},{Key=Tier,Value=public}]' \
--query 'Subnet.SubnetId' --output text)
PUB_SUB_B=$(aws ec2 create-subnet \
--vpc-id $VPC_ID \
--cidr-block 10.0.2.0/24 \
--availability-zone us-east-1b \
--tag-specifications 'ResourceType=subnet,Tags=[{Key=Name,Value=public-b},{Key=Tier,Value=public}]' \
--query 'Subnet.SubnetId' --output text)
# Enable auto-assign public IP on public subnets
aws ec2 modify-subnet-attribute --subnet-id $PUB_SUB_A --map-public-ip-on-launch
aws ec2 modify-subnet-attribute --subnet-id $PUB_SUB_B --map-public-ip-on-launch
# Create private subnets
PRIV_SUB_A=$(aws ec2 create-subnet \
--vpc-id $VPC_ID \
--cidr-block 10.0.11.0/24 \
--availability-zone us-east-1a \
--tag-specifications 'ResourceType=subnet,Tags=[{Key=Name,Value=private-a},{Key=Tier,Value=private}]' \
--query 'Subnet.SubnetId' --output text)
PRIV_SUB_B=$(aws ec2 create-subnet \
--vpc-id $VPC_ID \
--cidr-block 10.0.12.0/24 \
--availability-zone us-east-1b \
--tag-specifications 'ResourceType=subnet,Tags=[{Key=Name,Value=private-b},{Key=Tier,Value=private}]' \
--query 'Subnet.SubnetId' --output text)
# Create data subnets (isolated)
DATA_SUB_A=$(aws ec2 create-subnet \
--vpc-id $VPC_ID \
--cidr-block 10.0.21.0/24 \
--availability-zone us-east-1a \
--tag-specifications 'ResourceType=subnet,Tags=[{Key=Name,Value=data-a},{Key=Tier,Value=data}]' \
--query 'Subnet.SubnetId' --output text)
DATA_SUB_B=$(aws ec2 create-subnet \
--vpc-id $VPC_ID \
--cidr-block 10.0.22.0/24 \
--availability-zone us-east-1b \
--tag-specifications 'ResourceType=subnet,Tags=[{Key=Name,Value=data-b},{Key=Tier,Value=data}]' \
--query 'Subnet.SubnetId' --output text)
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.
- 3d ago First seen · 421 lines · 32 tokens per session scan A 85bf032ce76b
aws-vpc is a skill published in the GitHub repository BagelHole/DevOps-Security-Agent-Skills (1,053 stars, last pushed 3mo ago), licensed MIT. It adds 32 tokens to every session and 4,638 once invoked, about $0.0002 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 2026-09-03.
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