What is storage-s3-resiliency-expertise?

A read-only review of Amazon S3 buckets, which store files and other data in AWS. It checks settings related to recovery, security, access, encryption, replication, and data protection.

Use it to review one bucket or a group of buckets for versioning, replication, object locking, encryption, public access blocking, access policies, ownership, logging, and website hosting.

It helps reveal whether bucket settings could expose data or make recovery from deletion, damage, or an outage difficult.

storage-s3-resiliency-expertise — Skill for Claude Code and Codex by a

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 aws/tools-for-devops-agent --skill storage-s3-resiliency-expertise

Clone the repo

git clone --depth 1 https://github.com/aws/tools-for-devops-agent

Made for: Claude Code, Codex.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/aws/tools-for-devops-agent/storage-s3-resiliency-expertise/github.svg)](https://agentmods.dev/skills/aws/tools-for-devops-agent/storage-s3-resiliency-expertise)

Your own site

<a href="https://agentmods.dev/skills/aws/tools-for-devops-agent/storage-s3-resiliency-expertise"><img src="https://agentmods.dev/badge/skills/aws/tools-for-devops-agent/storage-s3-resiliency-expertise/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/aws/tools-for-devops-agent/storage-s3-resiliency-expertise"><img src="https://agentmods.dev/badge/skills/aws/tools-for-devops-agent/storage-s3-resiliency-expertise.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 220 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,657 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. Third-party audits

NVIDIA SkillSpector warn 7 Sept 2026

SkillSpector: 1 finding, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

medium Excessive Agency · line 235
Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.

Fix: Add human-in-the-loop confirmation for destructive, irreversible, or high-impact operations. Never auto-execute commands that modify files, send data, or alter system state.

How audits are shown

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.

Model	Per session	Once invoked
Fable 5.1	$0.00220	$0.02657
Opus 5	$0.00110	$0.01328
Sonnet 5	$0.00044	$0.00531
Haiku 4.5	$0.00022	$0.00266

Measured 9d ago against content hash 65ee3be64280, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

storage-s3-resiliency-expertise 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 9d 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/storage-s3-resiliency-expertise/SKILL.md · 254 lines

How it starts

The opening of the file, as written. The whole thing — 254 lines — stays where its author put it; the contents beside it link to each section on GitHub.

S3 Resiliency Review

Perform a structured, read-only resiliency, security, and data protection review of Amazon S3 buckets. Automatically handles single-bucket and multi-bucket (fleet) reviews based on how many buckets are provided.

When to Use

Activate this skill when the user asks to:

Review, audit, or assess an S3 bucket's resiliency, security, or data protection
Evaluate an S3 bucket's protection/recovery posture or disaster recovery readiness
Check any of: versioning, replication, object lock, encryption, block public access, bucket policy, ownership controls, server access logging, website hosting
Review a list of buckets ("review these buckets: A, B, C")

Do NOT activate for cost optimization, performance tuning, or EFS/FSx/AWS Backup/Storage Gateway.

Architecture

This skill (orchestrator/analyzer): input parsing, routing, finding logic application, report rendering.
Data collection: references/data-collection.md — the read-only control-plane API calls used to gather bucket configuration and the structured object they produce. Data is acquired with the agent's native use_aws tool under the assumed role in the target account. No credentials or profile are requested from the user.
Finding logic: references/finding-logic.md — all severity rules and body templates.
Report format: references/report-format.md — report structure, dimensions table, pre-render validation.
Fleet orchestration: references/fleet-orchestration.md — batching, caching, manifest, diffing (loaded only for multi-bucket reviews).
Operational depth: references/s3-resiliency-best-practices.md — reasoning behind thresholds, replication risk model, encryption tradeoffs, ownership migration patterns, triage decision tree.

Input Parsing & Validation

Accepted input formats

Single bucket name: my-production-bucket
Comma-separated: bucket-a, bucket-b, bucket-c
Newline-separated (pasted list)
File reference: "review buckets in buckets.txt" (read file, one bucket per line)
S3 URI/ARN/URL wrappers (stripped automatically per rules below)

Read the full file on GitHub · 254 lines

Files

What ships with it

11 files 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.

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.

9d ago First seen · 254 lines · 220 tokens per session scan A 65ee3be64280

Subscribe to this mod's changes

storage-s3-resiliency-expertise is a skill published in the GitHub repository aws/tools-for-devops-agent (46 stars, last pushed 5d ago), licensed Apache-2.0. It adds 220 tokens to every session and 2,657 once invoked, about $0.0011 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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