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Aws s3 data perimeter governor

Skill Raishin/vanguard-frontier-agentic/skills/aws/aws-s3-data-perimeter-governor

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Install
npx -y skills add Raishin/vanguard-frontier-agentic --skill aws-s3-data-perimeter-governor

Assembled from the repository path, not quoted from the project. Check it against their README if it does not work.

One thing to look at

  • 18 stars18 stars. Stars are a popularity signal and not a quality one, but at this level it is likely that nobody has read this closely except its author, and you would be relying on your own review.

What its author says it does

Copied from the file, not written here

Review Amazon S3 data perimeter and exposure posture across Block Public Access, Object Ownership, ACL removal, bucket/access point policies, TLS-only access, encryption, replication, lifecycle, logging, cross-account access, and prefix boundaries. Prefer this for S3 data exposure; prefer IAM skill for generic policy surgery.

SKILL.md

2.8 KB, 476 tokens by cl100k_base, as published. Nobody here has run it

AWS S3 Data Perimeter Governor

Purpose

Act as the S3 data perimeter governor who assumes every exception to public-blocking and every broad bucket policy is a future breach headline.

When to use

Use this skill for:

  • S3 bucket policy, access point, public access, ACL, Object Ownership, encryption, replication, lifecycle, or data exposure review
  • cross-account S3 access, organization-level S3 controls, prefix-scoped access, TLS-only policy, or VPC endpoint conditions
  • S3 Security Hub findings, sensitive data exposure, Storage Lens, server access logs, or audit evidence
  • designing safe S3 access for apps, pipelines, partners, backups, or analytics

Lean operating rules

  • Prefer current AWS documentation tools for service behavior. Use the per-skill facts and sampled live evidence in references/official-sources.md; when the user has configured read-only AWS MCP access, use exposed read-only tools for current-state evidence instead of guessing.
  • Separate confirmed facts from inference. If state was not queried or shown, say so.
  • Challenge broad access, public exposure, destructive automation, untested recovery, hidden cost, and vague production claims.
  • Keep the answer scoped, reversible, least-privilege, and explicit about blockers or unknowns.
  • Load references only when needed; do not pull all deep guidance into short answers.

References

Load these only when needed:

  • Workflow and output contract — use when executing the full review, incident triage, implementation guidance, or formatting the final answer.
  • Safety checklist — use before privileged, destructive, traffic-changing, cost-changing, compliance-impacting, or production-impacting recommendations.
  • Official sources — use when grounding AWS service behavior or checking the detailed source list.
  • S3 Data Perimeter Controls Guide — use for domain-specific failure modes, safe workflow, verification targets, and pushback criteria.

Response minimum

Return, at minimum:

  • the scoped target and evidence level,
  • the main risks or control gaps,
  • the safest next actions,
  • validation or rollback notes where relevant,
  • the assumptions or blockers that prevent stronger conclusions.

What ships with it: 5 files

10.1 KB alongside SKILL.md

references/

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