AWS Agent Skills is a collection of local instructions that help coding agents reason about AWS cloud services and engineering tasks. It supports agents working with areas such as identity, compute, storage, serverless, databases, networking, and security. The catalogue contains 18 service-focused skills and one plugin for using these capabilities with coding agents.
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 skills/itsmostafa/aws-agent-skills/cloudformationnpx skills add itsmostafa/aws-agent-skills --skill cloudformationgit clone --depth 1 https://github.com/itsmostafa/aws-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/itsmostafa/aws-agent-skills/cloudformation)<a href="https://agentmods.dev/skills/itsmostafa/aws-agent-skills/cloudformation"><img src="https://agentmods.dev/badge/skills/itsmostafa/aws-agent-skills/cloudformation.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 | $0.00034 | $0.02327 |
| Opus 5 | $0.00017 | $0.01163 |
| Sonnet 5 | $0.00007 | $0.00465 |
| Haiku 4.5 | $0.00003 | $0.00233 |
Grade A, and why
cloudformation 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 6d 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 — 386 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AWS CloudFormation
AWS CloudFormation provisions and manages AWS resources using templates. Define infrastructure as code, version control it, and deploy consistently across environments.
Table of Contents
Core Concepts
Templates
JSON or YAML files defining AWS resources. Key sections:
- Parameters: Input values
- Mappings: Static lookup tables
- Conditions: Conditional resource creation
- Resources: AWS resources (required)
- Outputs: Return values
Stacks
Collection of resources managed as a single unit. Created from templates.
Change Sets
Preview changes before executing updates.
Stack Sets
Deploy stacks across multiple accounts and regions.
Common Patterns
Basic Template Structure
AWSTemplateFormatVersion: '2010-09-09'
Description: My infrastructure template
Parameters:
Environment:
Type: String
AllowedValues: [dev, staging, prod]
Default: dev
Mappings:
EnvironmentConfig:
dev:
InstanceType: t3.micro
prod:
InstanceType: t3.large
Conditions:
IsProd: !Equals [!Ref Environment, prod]
Resources:
MyBucket:
Type: AWS::S3::Bucket
Properties:
BucketName: !Sub 'my-app-${Environment}-${AWS::AccountId}'
VersioningConfiguration:
Status: !If [IsProd, Enabled, Suspended]
Outputs:
BucketName:
Description: S3 bucket name
Value: !Ref MyBucket
Export:
Name: !Sub '${AWS::StackName}-BucketName'
Deploy a Stack
AWS CLI:
# Create stack
aws cloudformation create-stack \
--stack-name my-stack \
--template-body file://template.yaml \
--parameters ParameterKey=Environment,ParameterValue=prod \
--capabilities CAPABILITY_IAM
# Wait for completion
aws cloudformation wait stack-create-complete --stack-name my-stack
# Update stack
aws cloudformation update-stack \
--stack-name my-stack \
--template-body file://template.yaml \
--parameters ParameterKey=Environment,ParameterValue=prod
# Delete stack
aws cloudformation delete-stack --stack-name my-stack
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 6d ago First seen · 386 lines · 34 tokens per session scan A 31654958084e
cloudformation is a skill published in the GitHub repository itsmostafa/aws-agent-skills (1,150 stars, last pushed 5d ago), licensed MIT. It adds 34 tokens to every session and 2,327 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 2026-08-30.
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terrashark
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pier-cloud
This skill should be used when the user needs to consume the Pier Cloud (Lighthouse) API for cloud cost management — including JWT authentication, listing contexts, workspaces, and FinOps data views. Trigger whenever there is a need to integrate, automate, or debug calls to the Pier Cloud platform via Python, Node.js…
auditing-aws-s3-bucket-permissions
Systematically audit AWS S3 bucket permissions to identify publicly accessible buckets, overly permissive ACLs, misconfigured bucket policies, and missing encryption settings using AWS CLI, S3audit, and Prowler to enforce least-privilege data access controls.
enumerating-cloud-with-cloudfox
Map AWS and Azure attack paths and find exploitable misconfigurations with CloudFox.