cloudflare

A set of guidelines for developing Cloudflare Workers and using Cloudflare platform services. It covers code running close to users, caching, and other Cloudflare services.

In plain words
What is it for?
Use it when building Workers, planning how content is cached, or working with Cloudflare's network-based application services.
Why use it?
It helps keep Worker code, caching choices, and Cloudflare configuration consistent.

Cursor rule for Cursor

Install

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.

agentmods
npx agentmods add rules/jesseoue/cursor-rules/cloudflare
Clone the repo
git clone --depth 1 https://github.com/jesseoue/cursor-rules

Made for: Cursor.

Per session 0 Nothing until a file matches its globs; then the whole rule loads.
When invoked 3,659 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. Scan, not verified.
Origin unknown No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.00000 $0.03659
Opus 5 $0.00000 $0.01829
Sonnet 5 $0.00000 $0.00732
Haiku 4.5 $0.00000 $0.00366

Measured yesterday against content hash f36ce4de9fb1, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

cloudflare 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 yesterday.

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.

async fetch(request: Request, env: Env, ctx: ExecutionContext): Promise<Response> {
.cursor/rules/cloudflare.mdc · 569 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Changes

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.

  1. yesterday First seen · 569 lines · 0 tokens per session scan A f36ce4de9fb1

Subscribe to this mod's changes

cloudflare is a cursor rule published in the GitHub repository jesseoue/cursor-rules (6 stars, last pushed 10mo ago), with no licence file. It costs nothing until one of its globs matches a file; then it loads 3,659 tokens. 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 2026-08-31.