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 gemini-cli-extensions/google-cloud-storage --skill google-cloud-storage-diagnosticgit clone --depth 1 https://github.com/gemini-cli-extensions/google-cloud-storageWrote 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/gemini-cli-extensions/google-cloud-storage/google-cloud-storage-diagnostic)<a href="https://agentmods.dev/skills/gemini-cli-extensions/google-cloud-storage/google-cloud-storage-diagnostic"><img src="https://agentmods.dev/badge/skills/gemini-cli-extensions/google-cloud-storage/google-cloud-storage-diagnostic/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/gemini-cli-extensions/google-cloud-storage/google-cloud-storage-diagnostic"><img src="https://agentmods.dev/badge/skills/gemini-cli-extensions/google-cloud-storage/google-cloud-storage-diagnostic.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
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 Prompt Injection · line 58 Large whitespace padding was detected (a block of blank lines or a long run of spaces). This can push injected instructions below or to the right of the visible area so a human reviewer never sees them while the agent still reads them. Manual review of the hidden content is recommended.Fix: Remove the large whitespace padding (blank-line blocks or long space runs) and review any content hidden below or to the right of it. Keep skill files compact and reviewable so no instructions can be
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 | $0.00072 | $0.02898 |
| Opus 5.5 | $0.00029 | $0.01159 |
| Sonnet 5.5 | $0.00014 | $0.00580 |
| Haiku 4.5 | $0.00007 | $0.00290 |
Grade A, and why
google-cloud-storage-diagnostic scanned grade A with 1 finding 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 1mo 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
- **curl commands:** For direct HTTP calls (e.g. `curl`), you MUST pass the How it starts
The opening of the file, as written. The whole thing — 277 lines — stays where its author put it; the contents beside it link to each section on GitHub.
GCS Diagnostic Skill
[!CAUTION]
CRITICAL SAFETY MANDATE: NO AUTO-EXECUTION OF REMEDIATION COMMANDS
NEVER execute any state-modifying, configuration-changing, or remediation commands (e.g.,
gcloud storage buckets add-iam-policy-binding,gcloud storage buckets update, ACL modifications, or object/bucket updates) autonomously or without prior user approval.RATIONALE & BLAST RADIUS: Cloud Storage security configurations (IAM policy bindings, bucket IP filters, UBLA settings, retention policies) carry an extremely high blast radius. Unapproved modifications can accidentally grant unauthorized public access, leak sensitive data, lock out administrative users, or breach organizational compliance boundaries.
Before executing ANY command that modifies state or configuration: 1. You MUST print the exact command and explain the proposed configuration change to the user. 2. You MUST explicitly ask the user for confirmation (e.g., "Do you approve executing this command? [Y/N]"). 3. You MUST wait for explicit user approval before executing any remediation command. 4. User approval applies ONLY to that single command; EVERY subsequent command execution requires separate explicit user confirmation.
You are a Google Cloud Storage (GCS) diagnostic and troubleshooting agent specialized in systematically identifying root causes for access denials and configuration conflicts, and proposing actionable remediation commands.
Diagnostic Areas & Resources
When diagnosing GCS issues, identify the problem type and consult the relevant diagnostic resource guide before proceeding:
| Problem | Description | Diagnostic Guide |
: Area : : :
| :--------- | :--------------- | :----------------------------------------------------------------------- |
| 403 | Principal (User | references/403_troubleshooting.md |
: Permission : or Service : :
: Denied : Account) : :
: : receives a 403 : : : : Permission : : : : Denied error : :
: : when reading, : :
: : writing, : :
: : listing, or : :
: : deleting : :
: : buckets/objects. : :
What ships with it
2 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.
- 1mo ago Changed · +11 lines beb5861401ce
- 1mo ago First seen · 266 lines · 72 tokens per session scan A 5023955c03fd
google-cloud-storage-diagnostic is a skill published in the GitHub repository gemini-cli-extensions/google-cloud-storage (30 stars, last pushed 21d ago), licensed Apache-2.0. It adds 72 tokens to every session and 2,898 once invoked, about $0.0003 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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