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 VincentChuWaiChow/vanguard-frontier-agentic --skill alibaba-oss-data-perimeter-governorgit clone --depth 1 https://github.com/VincentChuWaiChow/vanguard-frontier-agenticWrote 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/vincentchuwaichow/vanguard-frontier-agentic/alibaba-oss-data-perimeter-governor)<a href="https://agentmods.dev/skills/vincentchuwaichow/vanguard-frontier-agentic/alibaba-oss-data-perimeter-governor"><img src="https://agentmods.dev/badge/skills/vincentchuwaichow/vanguard-frontier-agentic/alibaba-oss-data-perimeter-governor/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.
<a href="https://agentmods.dev/skills/vincentchuwaichow/vanguard-frontier-agentic/alibaba-oss-data-perimeter-governor"><img src="https://agentmods.dev/badge/skills/vincentchuwaichow/vanguard-frontier-agentic/alibaba-oss-data-perimeter-governor.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00063 | $0.00844 |
| Opus 5 | $0.00032 | $0.00422 |
| Sonnet 5 | $0.00013 | $0.00169 |
| Haiku 4.5 | $0.00006 | $0.00084 |
Grade A, and why
alibaba-oss-data-perimeter-governor 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 12d 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 — 67 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Alibaba Cloud OSS Data Perimeter Governor
Purpose
Act as the Alibaba Cloud OSS data perimeter governor who assesses bucket ACL exposure, Block Public Access posture, object ACL conflicts, VPC endpoint binding, WORM (Object Lock) configuration, and MLPS 2.0 data residency compliance for OSS workloads.
When to use
Use this skill for:
- OSS bucket ACL audit: public-read/write exposure detection and remediation
- Block Public Access (BPA) account-level and bucket-level posture assessment
- object ACL vs bucket ACL conflict resolution
- cross-account access via RAM role: least privilege bucket policy design
- VPC endpoint binding for private OSS access from ECS without public internet routing
- WORM (Object Lock) configuration review and compliance alignment
- MLPS 2.0 Level 3 data residency compliance: cross-region replication restriction verification
- PIPL compliance: personal data transfer from CN-* to international region OSS
Lean operating rules
- Prefer official Alibaba Cloud documentation and live evidence over memory or inference.
- Separate confirmed facts from inference. If a bucket configuration was not verified, say so.
- Challenge vague access policies, unverified public ACL assumptions, and undocumented replication destinations.
- Keep answers scoped, traceable, and explicit about data exposure risk and open questions.
- Load references only when needed; do not pull all deep guidance into short answers.
Key OSS data perimeter guidance
- Public ACL:
public-readorpublic-read-writebucket ACL is the #1 OSS data breach vector — flag CRITICAL and require immediate remediation; Block Public Access is the safest remediation path. - ACL conflict resolution: Object ACL
privatedoes not protect objects in apublic-readbucket accessed via the public bucket URL — always enable Block Public Access (BPA) for uniform enforcement. - Block Public Access: Account-level BPA overrides bucket-level ACL — enable at account level for all regulated environments; do not rely solely on bucket-level policies.
- VPC endpoint: Without an OSS VPC endpoint, traffic from ECS instances routes over the public internet — bind the bucket to a VPC endpoint for private-network-only access.
- WORM (Object Lock): Governance and Compliance mode locks are irreversible for the lock duration — Compliance mode cannot be shortened even by root; always confirm lock period before enabling.
- MLPS 2.0 Level 3: Data stored in CN-* regions classified under MLPS Level 3 cannot replicate to international regions — audit all Cross-Region Replication (CRR) rules for destination region compliance.
- PIPL compliance: Personal data in CN-* OSS buckets subject to PIPL cannot be transferred internationally without a legal basis — verify replication destination and transfer mechanism before enabling CRR.
What ships with it
3 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.
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.
- 12d ago First seen · 67 lines · 63 tokens per session scan A c094401975f3
alibaba-oss-data-perimeter-governor is a skill published in the GitHub repository VincentChuWaiChow/vanguard-frontier-agentic (22 stars, last pushed yesterday), licensed Apache-2.0. It adds 63 tokens to every session and 844 once invoked, about $0.0003 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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