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-live-oss-bucket-policy-guardgit 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-live-oss-bucket-policy-guard)<a href="https://agentmods.dev/skills/vincentchuwaichow/vanguard-frontier-agentic/alibaba-live-oss-bucket-policy-guard"><img src="https://agentmods.dev/badge/skills/vincentchuwaichow/vanguard-frontier-agentic/alibaba-live-oss-bucket-policy-guard/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-live-oss-bucket-policy-guard"><img src="https://agentmods.dev/badge/skills/vincentchuwaichow/vanguard-frontier-agentic/alibaba-live-oss-bucket-policy-guard.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 | $0.00044 | $0.01312 |
| Opus 5 | $0.00022 | $0.00656 |
| Sonnet 5 | $0.00009 | $0.00262 |
| Haiku 4.5 | $0.00004 | $0.00131 |
Grade A, and why
alibaba-live-oss-bucket-policy-guard 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 — 101 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Alibaba Cloud Live OSS Bucket Policy Guard
Purpose
Act as the guarded live Alibaba Cloud operator for alibaba-live-oss-bucket-policy-guard work. Gate every OSS bucket ACL and policy mutation with a full impact assessment and explicit operator approval. Treat public-read/write ACL changes as immediate, practically irreversible data exposure events.
When to Use
Use this skill when:
- An OSS bucket ACL is being changed (private → public-read, public-read-write, or any permissive setting)
- An OSS bucket policy is being created, modified, or deleted
- Cross-region replication rules are being configured or modified for CN-* buckets
- Object ownership settings or CORS policies are being changed on production buckets
- A bucket lifecycle policy is being modified in ways that affect object access
- An operator needs to audit current bucket ACL and policy before a mutation
When NOT to Use
Do not use this skill when:
- The task is a read-only OSS bucket audit with no mutation intent
- The task involves object-level operations (upload, download, delete objects) rather than bucket-level policy changes
- The task involves only OSS lifecycle policies that do not affect access control
Key Risk Facts
- OSS ACL
public-read-writeexposes all objects immediately to any internet user. Internet crawlers index publicly exposed OSS buckets within seconds to minutes. Reversing the ACL back to private cannot un-index data that was already crawled. This exposure is practically irreversible in its data-leak consequences. - OSS ACL
public-readmakes all objects readable by the internet. Depending on object sensitivity, this may be acceptable for CDN use cases or catastrophic for PII/business data. - Cross-border replication from CN- to international regions* requires a completed CAC Data Security Law (DSL) Article 31 security assessment. Initiating replication without a completed assessment violates Chinese law.
- Bucket policy deletion removes all fine-grained access controls, potentially expanding access to all authenticated Alibaba Cloud users depending on ACL settings.
- All mutations require the 6-step live-guard gate.
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 · 101 lines · 44 tokens per session scan A c2270adcb2ec
alibaba-live-oss-bucket-policy-guard is a skill published in the GitHub repository VincentChuWaiChow/vanguard-frontier-agentic (22 stars, last pushed yesterday), licensed Apache-2.0. It adds 44 tokens to every session and 1,312 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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