theprimeagen/skills/cloudflare-r2
skills/cloudflare-r2/SKILL.md
Cloudflare R2 bucket binding usage rules
$ install --global
skillsauthnpx skillsauth add theprimeagen/skills skills/cloudflare-r2Install this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
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SKILL.md
- description:
- Cloudflare R2 bucket binding usage rules
- globs:
- src/**/*.ts
- alwaysApply:
- false
Cloudflare R2
Rules
- Declare bucket bindings in
wrangler.jsoncunderr2_bucketswith bothbindingandbucket_name; keep this file as the source of truth. - Access buckets via
env.<BINDING>inside each Worker handler, and keep the binding name identical in both config and code. - For object operations, handle
get()misses (null) explicitly, sethttpMetadata(for examplecontentType) onput(), and return clear HTTP status codes.
Example 1: wrangler.jsonc
{
"$schema": "node_modules/wrangler/config-schema.json",
"name": "my-worker",
"main": "src/index.ts",
"compatibility_date": "2026-02-24",
"r2_buckets": [
{
"binding": "FILES",
"bucket_name": "my-files"
}
]
}
Example 2: Minimal put()
await env.FILES.put("hello.txt", "hello from r2", {
httpMetadata: { contentType: "text/plain; charset=utf-8" },
});
Example 3: Minimal get()
const object = await env.FILES.get("hello.txt");
if (!object) return new Response("Not found", { status: 404 });
const headers = new Headers();
object.writeHttpMetadata(headers);
headers.set("etag", object.httpEtag);
return new Response(object.body, { headers });
Note: if you mean "htmlEtags", the R2 field is actually httpEtag; use httpEtag for response etag headers because it is already correctly quoted.
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