aws-s3-data-perimeter-governor SKILL.md skillA
aws-s3-data-perimeter-governor from vincentchuwaichow/vanguard-frontier-agentic is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add vincentchuwaichow/vanguard-frontier-agentic/aws-s3-data-perimeter-governor@v0.1.4Pins v0.1.4 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- vincentchuwaichow/vanguard-frontier-agentic
- Path
skills/aws/aws-s3-data-perimeter-governor/SKILL.md- Versions recorded
- 5
- Latest version
- v0.1.4, committed Jul 31, 2026
- First version recorded
- May 5, 2026
- Size
- 2,892 bytes
- Repository stars
- 24
- License
- Apache-2.0
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.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# 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. …
Read the whole file at its exact version.
How to install
mdr add vincentchuwaichow/vanguard-frontier-agentic/aws-s3-data-perimeter-governor@sha256:b6a3e4807e762ec6The line at the top of this page pins the label v0.1.4, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_ju3e4y5h7rmfodm2)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between May 5, 2026 and Jul 31, 2026, about one every 22 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v0.1.4 latest | 2026-07-31 | e5f8521 | 2,892 B | A | view · diff |
| v0.1.4 | 2026-06-02 | 8549cae | 2,882 B | A | view · diff |
| v0.1.3 | 2026-06-02 | 3c9fea1 | 2,700 B | A | view · diff |
| v0.1.2 | 2026-05-05 | d429f6f | 2,794 B | A | view · diff |
| v0.1.2 | 2026-05-05 | 8361fc7 | 2,749 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (2892 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
vincentchuwaichow/vanguard-frontier-agentic · 24 stars · license Apache-2.0 · pushed 2026-10-20 · branch master
API
GET https://markdownregistry.com/api/v1/artifacts/art_ju3e4y5h7rmfodm2 GET https://markdownregistry.com/api/v1/resolve?ref=vincentchuwaichow/vanguard-frontier-agentic/aws-s3-data-perimeter-governor GET https://markdownregistry.com/api/v1/blob/b6a3e4807e762ec679b929384663bc30fb5ab5e59678be0a8d4fd37f437f4982
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.