feat(cloudflare): add Cloudflare runtime srcset builder

packages/cloudflare/.size-limit.json

@@ -0,0 +1,8 @@
+[
+  {
+    "name": "All publics",
+    "path": "dist/index.js",
+    "import": "*",
+    "limit": "1.5 kB"
+  }
+]

packages/cloudflare/README.md

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+# @srcset/cloudflare
+
+[![ESM-only package][package]][package-url]
+[![NPM version][npm]][npm-url]
+[![Node version][node]][node-url]
+[![Dependencies status][deps]][deps-url]
+[![Install size][size]][size-url]
+[![Build status][build]][build-url]
+[![Coverage status][coverage]][coverage-url]
+
+[package]: https://img.shields.io/badge/package-ESM--only-ffe536.svg
+[package-url]: https://nodejs.org/api/esm.html
+
+[npm]: https://img.shields.io/npm/v/%40srcset%2Fcloudflare.svg
+[npm-url]: https://npmjs.com/package/@srcset/cloudflare
+
+[node]: https://img.shields.io/node/v/%40srcset%2Fcloudflare.svg
+[node-url]: https://nodejs.org
+
+[deps]: https://img.shields.io/librariesio/release/npm/%40srcset%2Fcloudflare
+[deps-url]: https://libraries.io/npm/%40srcset%2Fcloudflare
+
+[size]: https://deno.bundlejs.com/badge?q=%40srcset%2Fcloudflare
+[size-url]: https://bundlejs.com/?q=%40srcset%2Fcloudflare
+
+[build]: https://img.shields.io/github/actions/workflow/status/TrigenSoftware/srcset/tests.yml?branch=main
+[build-url]: https://github.com/TrigenSoftware/srcset/actions
+
+[coverage]: https://img.shields.io/codecov/c/github/TrigenSoftware/srcset.svg
+[coverage-url]: https://app.codecov.io/gh/TrigenSoftware/srcset
+
+Adapter for [Cloudflare image transformations](https://developers.cloudflare.com/images/transform-images/): srcset variant urls for content images, e.g. from an API or a CMS.
+
+- 🌐 Runtime builder of loader-shaped srcset objects, isomorphic: browser and server
+- 🚀 Zero configuration on a Cloudflare zone: relative urls from `/cdn-cgi/image`, no signing
+- 🔧 Custom transformations via the `processing` hook, e.g. `format=auto` negotiation
+- 🛠 Passthrough mode for local development outside of a Cloudflare zone
+
+## Install
+
+```bash
+# pnpm
+pnpm add @srcset/cloudflare @srcset/runtime
+# yarn
+yarn add @srcset/cloudflare @srcset/runtime
+# npm
+npm i @srcset/cloudflare @srcset/runtime
+```
+
+## Usage
+
+Srcset objects for CMS images, on a Cloudflare zone:
+
+```ts
+import { Cloudflare } from '@srcset/cloudflare'
+
+const cloudflare = new Cloudflare()
+const { src, srcSet, srcMap } = cloudflare.image(photo.url, {
+  width: [600, 1200],
+  format: ['webp', 'jpg']
+})
+```
+
+Format negotiation by the `Accept` header, instead of format variants:
+
+```ts
+const cloudflare = new Cloudflare({
+  processing: ({ width }) => `width=${width},format=auto`
+})
+```
+
+Passthrough mode - untouched source urls, e.g. for local development outside of a Cloudflare zone:
+
+```ts
+const cloudflare = new Cloudflare({
+  passthrough: import.meta.env.DEV
+})
+```
+
+## Documentation
+
+For more details, guides and API references, check out the [documentation website](https://srcset.js.org/proxies/cloudflare/).

packages/cloudflare/oxlint.config.ts

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+import { defineConfig } from '@trigen/oxlint'
+import testConfig from '@trigen/oxlint-config/test'
+import tsTypeCheckedConfig from '@trigen/oxlint-config/typescript-type-checked'
+import rootConfig from '../../oxlint.config.ts'
+
+export default defineConfig({
+  extends: [
+    rootConfig,
+    tsTypeCheckedConfig,
+    testConfig
+  ],
+  env: {
+    node: false,
+    browser: true
+  }
+})

packages/cloudflare/package.json

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+{
+  "name": "@srcset/cloudflare",
+  "type": "module",
+  "version": "1.0.0",
+  "description": "Adapter for Cloudflare image transformations: srcset variant urls for content images, e.g. from an API or a CMS.",
+  "author": {
+    "name": "Dan Onoshko",
+    "email": "danon0404@gmail.com",
+    "url": "https://github.com/dangreen"
+  },
+  "license": "MIT",
+  "homepage": "https://srcset.js.org/proxies/cloudflare/",
+  "funding": "https://ko-fi.com/dangreen",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/TrigenSoftware/srcset.git",
+    "directory": "packages/cloudflare"
+  },
+  "bugs": {
+    "url": "https://github.com/TrigenSoftware/srcset/issues"
+  },
+  "keywords": [
+    "srcset",
+    "image",
+    "responsive",
+    "cloudflare"
+  ],
+  "engines": {
+    "node": ">=22"
+  },
+  "sideEffects": false,
+  "exports": {
+    "./package.json": "./package.json",
+    ".": "./src/index.ts"
+  },
+  "publishConfig": {
+    "exports": {
+      "./package.json": "./package.json",
+      ".": {
+        "types": "./dist/index.d.ts",
+        "default": "./dist/index.js"
+      }
+    },
+    "directory": "package",
+    "linkDirectory": false
+  },
+  "files": [
+    "dist"
+  ],
+  "scripts": {
+    "clear:package": "del ./package",
+    "clear:dist": "del ./dist",
+    "clear": "del ./package ./dist ./coverage",
+    "prepublishOnly": "run build clear:package clean-publish",
+    "postpublish": "pnpm clear:package",
+    "emitDeclarations": "tsc -p ./tsconfig.build.json --emitDeclarationOnly",
+    "build:dist": "run -p emitDeclarations [ vite build ]",
+    "build": "run clear:dist build:dist",
+    "lint": "oxlint",
+    "format": "oxlint --fix",
+    "test:unit": "vitest run --coverage",
+    "test:unit:watch": "vitest watch",
+    "test:size": "size-limit",
+    "test:types": "tsc --noEmit",
+    "test": "run -p lint test:unit test:types"
+  },
+  "peerDependencies": {
+    "@srcset/runtime": "workspace:^"
+  },
+  "devDependencies": {
+    "@size-limit/preset-small-lib": "^12.0.0",
+    "@srcset/runtime": "workspace:^",
+    "@types/node": "^22.0.0",
+    "size-limit": "^12.0.0"
+  }
+}