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 jsgerman-oss/blackrim-nimbus-skills --skill cf-storage-and-databasesgit clone --depth 1 https://github.com/jsgerman-oss/blackrim-nimbus-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/jsgerman-oss/blackrim-nimbus-skills/cf-storage-and-databases)<a href="https://agentmods.dev/skills/jsgerman-oss/blackrim-nimbus-skills/cf-storage-and-databases"><img src="https://agentmods.dev/badge/skills/jsgerman-oss/blackrim-nimbus-skills/cf-storage-and-databases/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/jsgerman-oss/blackrim-nimbus-skills/cf-storage-and-databases"><img src="https://agentmods.dev/badge/skills/jsgerman-oss/blackrim-nimbus-skills/cf-storage-and-databases.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00060 | $0.02729 |
| Opus 5 | $0.00030 | $0.01365 |
| Sonnet 5 | $0.00012 | $0.00546 |
| Haiku 4.5 | $0.00006 | $0.00273 |
Grade A, and why
cf-storage-and-databases 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 — 167 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Cloudflare Storage and Databases
When to use
- Choosing between R2, D1, KV, Queues, Hyperdrive, and Vectorize for a new workload.
- Migrating from S3 or an origin database to edge-native storage.
- Designing a data model for D1 (SQLite at the edge) with read replicas.
- Understanding the consistency tradeoffs of Workers KV.
- Connecting an existing Postgres / MySQL origin database through Hyperdrive.
- Building a vector search feature with Vectorize.
Decision tree
| Need | Service |
|---|---|
| Large binary or blob storage, low egress cost, S3-compatible | R2 |
| Relational queries (SQL) at the edge, small-to-medium datasets | D1 |
| Fast global key-value reads, eventual consistency acceptable | Workers KV |
| Durable message delivery, decoupling producer/consumer | Queues |
| Edge-speed connections to a remote Postgres / MySQL | Hyperdrive |
| Approximate nearest-neighbor vector search | Vectorize |
| Ephemeral coordination state, single-region consistency | Durable Object storage (not a standalone service — part of a DO) |
R2
R2 is Cloudflare's S3-compatible object store. The defining feature: zero egress fees for reads served through a Worker or a public R2 bucket URL.
Defaults
- Access from Workers via the
R2Bucketbinding inenv— never via S3-compatible API from inside a Worker (that would route over the public internet). - Public bucket URLs: disabled by default. Enable only for truly public assets (images, downloads). For everything else, serve via a Worker that performs authorization before streaming the object.
- Signed URLs: use
bucket.createSignedUrlin the Worker to grant time-limited access to private objects without exposing the bucket publicly. - Encryption: R2 encrypts all objects at rest with AES-256. Customer-managed keys (BYOK) available for enterprise accounts.
- Metadata: store structured metadata in R2 object's custom metadata (
httpMetadata,customMetadata) for lightweight attributes; avoid storing large metadata blobs. - S3-compatible API: available for migration tooling and non-Worker clients. Use scoped R2 API tokens (not global API key) for any non-Worker access.
- Lifecycle rules: configure object expiry and multipart cleanup via dashboard or Terraform to avoid unbounded storage growth.
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 · 167 lines · 60 tokens per session scan A cbc86987d413
cf-storage-and-databases is a skill published in the GitHub repository jsgerman-oss/blackrim-nimbus-skills (8 stars, last pushed 27d ago), licensed MIT. It adds 60 tokens to every session and 2,729 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 2026-08-31.
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