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 secondsky/claude-skills --skill cloudflare-r2git clone --depth 1 https://github.com/secondsky/claude-skillsWrote 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/secondsky/claude-skills/cloudflare-r2)<a href="https://agentmods.dev/skills/secondsky/claude-skills/cloudflare-r2"><img src="https://agentmods.dev/badge/skills/secondsky/claude-skills/cloudflare-r2/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/secondsky/claude-skills/cloudflare-r2"><img src="https://agentmods.dev/badge/skills/secondsky/claude-skills/cloudflare-r2.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 | $0.00041 | $0.03535 |
| Opus 5 | $0.00020 | $0.01767 |
| Sonnet 5 | $0.00008 | $0.00707 |
| Haiku 4.5 | $0.00004 | $0.00353 |
Grade A, and why
cloudflare-r2 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 5d 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 — 421 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Cloudflare R2 Object Storage
Status: Production Ready ✅ | Last Verified: 2025-12-27 | v3.0.0
Contents: Quick Start • New Features • Core R2 API • Critical Rules • Agents & Commands • References
Quick Start (5 Minutes)
1. Create R2 Bucket
bunx wrangler r2 bucket create my-bucket
Bucket naming: 3-63 chars, lowercase, numbers, hyphens only
2. Configure Binding
Add to wrangler.jsonc:
{
"name": "my-worker",
"main": "src/index.ts",
"compatibility_date": "2025-10-11",
"r2_buckets": [
{
"binding": "MY_BUCKET", // env.MY_BUCKET
"bucket_name": "my-bucket", // Actual bucket
"preview_bucket_name": "my-bucket-preview" // Optional: dev bucket
}
]
}
CRITICAL: binding = code access name, bucket_name = actual R2 bucket
3. Basic Upload/Download
import { Hono } from 'hono';
type Bindings = {
MY_BUCKET: R2Bucket;
};
const app = new Hono<{ Bindings: Bindings }>();
// Upload
app.put('/upload/:filename', async (c) => {
const filename = c.req.param('filename');
const body = await c.req.arrayBuffer();
const object = await c.env.MY_BUCKET.put(filename, body, {
httpMetadata: {
contentType: c.req.header('content-type') || 'application/octet-stream',
},
});
return c.json({
success: true,
key: object.key,
size: object.size,
});
});
// Download
app.get('/download/:filename', async (c) => {
const object = await c.env.MY_BUCKET.get(c.req.param('filename'));
if (!object) {
return c.json({ error: 'Not found' }, 404);
}
return new Response(object.body, {
headers: {
'Content-Type': object.httpMetadata?.contentType || 'application/octet-stream',
'ETag': object.httpEtag,
},
});
});
export default app;
What ships with it
16 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.
- references/advanced-features.md 14 KB
- references/cloudflare-access-integration.md 14 KB
- references/common-patterns.md 13 KB
- references/cors-configuration.md 2.7 KB
- references/data-catalog-iceberg.md 15 KB
- references/event-notifications.md 16 KB
- references/performance-optimization.md 16 KB
- references/r2-sql-integration.md 14 KB
- references/s3-compatibility.md 7.7 KB
- references/setup-guide.md 8.5 KB
- references/workers-api.md 9.7 KB
- templates/r2-cors-config.json 3.3 KB
- templates/r2-multipart-upload.ts 5.7 KB runs code
- templates/r2-presigned-urls.ts 7.2 KB runs code
- templates/r2-simple-upload.ts 5.1 KB runs code
- templates/wrangler-r2-config.jsonc 1.1 KB
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.
- 5d ago First seen · 421 lines · 41 tokens per session scan A 6b3a989d73de
cloudflare-r2 is a skill published in the GitHub repository secondsky/claude-skills (216 stars, last pushed yesterday), licensed MIT. It adds 41 tokens to every session and 3,535 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 2026-09-03.
Other skills, from other repositories
remember
Record why something is the way it is — a decision and its reasoning, a lesson that cost time, or a standing constraint. Use when the reasoning behind a choice would be expensive to reconstruct later.
bootstrap
Set up chamnan in this repository for the first time — build the architecture index, measure how well the code describes itself, fill in missing file comments, and record a baseline. Run once per repo.
resume
Write down where this stretch of work stopped, so the next session continues instead of restarting. Use at the end of a working session, or when handing the repository to someone else.
milestone
Record a change that reshaped the repository — what moved, why it was worth doing, and which areas it touched. Use after a migration, a rewrite, or a decision that changed how part of the system works.
capture
Write down a procedure worth keeping — a multi-step process, a trap that cost real time, or something that has now come up three times. Use it the moment you finish such a task, while the details are still exact.
promote
Turn a scratch script into a permanent tool this repo keeps. Use when a check, report, or analysis has proved worth running more than once.