feat: deno platform

Author: lishaduck

.patterns/jsdoc-documentation.md

@@ -567,4 +567,4 @@ export const TypeId = ...
 - [ ] Integration examples for advanced use cases
 - [ ] Real-world usage patterns demonstrated
 
-This comprehensive JSDoc approach ensures that Effect library documentation provides practical, reliable examples that help developers understand and correctly use the APIs.
+This comprehensive JSDoc approach ensures that Effect library documentation provides practical, reliable examples that help developers understand and correctly use the APIs.

deno.json

@@ -1,8 +1,13 @@
 {
   "$schema": "https://raw.githubusercontent.com/denoland/deno/refs/heads/main/cli/schemas/config-file.v1.json",
   "nodeModulesDir": "manual",
-  "unstable": ["bare-node-builtins", "node-globals"],
-  "workspace": ["./packages/*"],
+  "unstable": [
+    "bare-node-builtins",
+    "node-globals"
+  ],
+  "workspace": [
+    "./packages/*"
+  ],
   "exclude": [
     "**/*.mjs",
     "**/*.cjs",

eslint.config.js

@@ -153,5 +153,11 @@ export default tseslint.config(
         }
       ]
     }
+  },
+  {
+    files: ["packages/platform-deno/src/**/*", "packages/platform-deno/test/**/*"],
+    rules: {
+      "import-x/namespace": "off"
+    }
   }
 )

packages/effect/src/internal/effect.ts

@@ -1092,10 +1092,10 @@ export const fn: typeof Effect.fn = function() {
   const name = nameFirst ? arguments[0] : "Effect.fn"
   const spanOptions = nameFirst ? arguments[1] : undefined
 
-  const prevLimit = globalThis.Error.stackTraceLimit
-  globalThis.Error.stackTraceLimit = 2
+  const prevLimit = (globalThis.Error as ErrorWithStackTraceLimit).stackTraceLimit
+  ;(globalThis.Error as ErrorWithStackTraceLimit).stackTraceLimit = 2
   const defError = new globalThis.Error()
-  globalThis.Error.stackTraceLimit = prevLimit
+  ;(globalThis.Error as ErrorWithStackTraceLimit).stackTraceLimit = prevLimit
 
   if (nameFirst) {
     return (body: Function, ...pipeables: Array<Function>) =>
@@ -1131,10 +1131,10 @@ const makeFn = (
     if (!isEffect(result)) {
       return result
     }
-    const prevLimit = globalThis.Error.stackTraceLimit
-    globalThis.Error.stackTraceLimit = 2
+    const prevLimit = (globalThis.Error as ErrorWithStackTraceLimit).stackTraceLimit
+    ;(globalThis.Error as ErrorWithStackTraceLimit).stackTraceLimit = 2
     const callError = new globalThis.Error()
-    globalThis.Error.stackTraceLimit = prevLimit
+    ;(globalThis.Error as ErrorWithStackTraceLimit).stackTraceLimit = prevLimit
     return updateService(
       addSpan ?
         useSpan(name, spanOptions!, (span) => provideParentSpan(result, span)) :

packages/effect/src/unstable/ai/Tool.ts

@@ -28,6 +28,7 @@
  */
 import type * as Effect from "../../Effect.ts"
 import { constFalse, constTrue, identity } from "../../Function.ts"
+import type { ErrorWithStackTraceLimit } from "../../internal/tracer.ts"
 import type * as JsonSchema from "../../JsonSchema.ts"
 import { pipeArguments } from "../../Pipeable.ts"
 import * as Predicate from "../../Predicate.ts"
@@ -1305,11 +1306,11 @@ function filter(obj: any) {
  */
 export const unsafeSecureJsonParse = (text: string): unknown => {
   // Performance optimization, see https://github.com/fastify/secure-json-parse/pull/90
-  const { stackTraceLimit } = Error
-  Error.stackTraceLimit = 0
+  const { stackTraceLimit } = Error as ErrorWithStackTraceLimit
+  ;(Error as ErrorWithStackTraceLimit).stackTraceLimit = 0
   try {
     return _parse(text)
   } finally {
-    Error.stackTraceLimit = stackTraceLimit
+    ;(Error as ErrorWithStackTraceLimit).stackTraceLimit = stackTraceLimit
   }
 }

packages/effect/src/unstable/http/FetchHttpClient.ts

@@ -29,6 +29,7 @@ export class RequestInit extends ServiceMap.Service<RequestInit, globalThis.Requ
 const fetch: HttpClient.HttpClient = HttpClient.make((request, url, signal, fiber) => {
   const fetch = fiber.getRef(Fetch)
   const options: globalThis.RequestInit = fiber.services.mapUnsafe.get(RequestInit.key) ?? {}
+  // @ts-ignore
   const headers = options.headers ? Headers.merge(Headers.fromInput(options.headers), request.headers) : request.headers
   const send = (body: BodyInit | undefined) =>
     Effect.map(

packages/effect/src/unstable/workers/Transferable.ts

@@ -154,5 +154,6 @@ export const MessagePort: Transferable<Schema.declare<MessagePort>> = schema(
  */
 export const Uint8Array: Transferable<Schema.Uint8Array> = schema(
   Schema.Uint8Array,
+  // @ts-ignore
   (_) => [_.buffer]
 )

packages/platform-deno/LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2025 Effectful Technologies Inc
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

packages/platform-deno/README.md

@@ -0,0 +1,7 @@
+# `@effect/platform-deno`
+
+Provides Deno-specific implementations for the abstractions defined in [`@effect/platform`](https://github.com/Effect-TS/effect/tree/main/packages/platform), allowing you to write platform-independent code that runs smoothly in Deno environments.
+
+## Documentation
+
+- **API Reference**: [View the full documentation](https://effect-ts.github.io/effect/docs/platform-deno).

packages/platform-deno/docgen.json

@@ -0,0 +1,16 @@
+{
+  "$schema": "../../node_modules/@effect/docgen/schema.json",
+  "srcLink": "https://github.com/Effect-TS/effect/tree/main/packages/platform-deno/src/",
+  "exclude": ["src/internal/**/*.ts"],
+  "examplesCompilerOptions": {
+    "noEmit": true,
+    "strict": true,
+    "skipLibCheck": true,
+    "moduleResolution": "NodeNext",
+    "module": "ES2022",
+    "target": "ES2022",
+    "lib": ["ES2022", "DOM", "DOM.Iterable"],
+    "rewriteRelativeImportExtensions": true,
+    "allowImportingTsExtensions": true
+  }
+}