LordCoughmann · Oct 13, 2026 · Oct 13, 2026 · Oct 13, 2026 · Oct 13, 2026 · Oct 13, 2026
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
@@ -224,7 +224,12 @@ pnpm -r update <package...>   # in-range bumps only
 pnpm check && pnpm verify     # both gates must pass before opening the PR
 ```
 
-Caret ranges stop short on `0.x` packages (caret pins the minor), so those need an explicit target: `pnpm update oxfmt@0.68.0`. Upstream majors that change our own contract are separate work, not part of the sweep — `@browserbasehq/stagehand` v4 (extension-based runtime, see the Stagehand decisions docs) and `vitest` 5 while `@cloudflare/vitest-plugin` peers `vitest ^4.1.0`.
+Caret ranges stop short on `0.x` packages (caret pins the minor), so those need an explicit target: `pnpm update oxfmt@0.68.0`. Upstream majors that change our own contract are separate work, not part of the sweep — `@browserbasehq/stagehand` v4 (extension-based runtime, see the Stagehand decisions docs).
+
+Two follow-ups are parked for the next sweep:
+
+- **Remove `fsModuleCache: false` from the four workerd vitest configs.** Vitest 5 enables the filesystem module cache by default; `@cloudflare/vitest-plugin` 1.4.0 cannot read those host-FS cache entries from workerd, so every test file fails before running (`readAll: no such file or directory`). Revert the overrides once [`cloudflare/workers-sdk#16163`](https://github.com/cloudflare/workers-sdk/pull/16163) ships.
+- **The 16 anti-slop rules in `@mpsuesser/oxlint-plugin-effect` are not adopted.** Since 0.5.0 both presets enable 16 generic rules ported from `dmmulroy/anti-slop` (`no-unknown-parameters`, `no-unsafe-dictionary-type`, `no-runtime-typeof`, `require-safety-comment-for-type-assertion`, …), taking the rule count 57 → 73. On this codebase they produce 1410 findings across 139 files, so they stay off in `oxlint.config.ts`; the other 57 rules pass clean. Adopting them is its own lint-policy migration.
 
 Bumping outside the monthly cadence is fine for security fixes and for known-needed peer-dep ranges (e.g., before a release that needs to drop support for an old effect version). Just don't expect to see Dependabot queue it for you.
 

diff --git a/deno.lock b/deno.lock
diff --git a/docs/getting-started.md b/docs/getting-started.md
@@ -9,23 +9,23 @@ Pick the client that matches what you're using now:
 **Coming from `@cloudflare/playwright` or upstream Playwright?**
 
 ```bash
-pnpm add @effect-libs/browser-playwright effect@4.0.0-rc.115
+pnpm add @effect-libs/browser-playwright effect@4.0.0
 ```
 
 `@effect-libs/browser-playwright` brings `@effect-libs/cloudflare-playwright` (our maintained fork of `@cloudflare/playwright@1.3.0`) as a transitive direct dependency — no separate install.
 
-> **Effect v4 RC required.** All packages require the Effect v4 RC API and are incompatible with Effect v3 and prior Effect v4 beta APIs.
+> **Effect v4 required.** All packages require the Effect v4 API and are incompatible with Effect v3 and prior Effect v4 beta APIs.
 
 **Coming from `@browserbasehq/stagehand`?**
 
 ```bash
-pnpm add @effect-libs/browser-stagehand @browserbasehq/stagehand effect@4.0.0-rc.115
+pnpm add @effect-libs/browser-stagehand @browserbasehq/stagehand effect@4.0.0
 ```
 
 **Want a zero-dependency Chrome DevTools Protocol client without `nodejs_compat`?**
 
 ```bash
-pnpm add @effect-libs/browser-cdp effect@4.0.0-rc.115
+pnpm add @effect-libs/browser-cdp effect@4.0.0
 ```
 
 [Choosing a client](./overview.md#choosing-a-client) covers the stability / API surface / dependency trade-offs. For per-client deep-dives (added APIs, errors, comparison with alternatives), see [`browser-playwright`](./packages/playwright/index.md), [`browser-stagehand`](./packages/stagehand/index.md), and [`browser-cdp`](./packages/cdp/index.md).

diff --git a/docs/packages/cdp/index.md b/docs/packages/cdp/index.md
@@ -7,10 +7,10 @@ A zero-dependency, native-WebSocket `@effect-libs/browser-cdp` client with a Pla
 ## Install
 
 ```bash
-pnpm add @effect-libs/browser-cdp effect@4.0.0-rc.115
+pnpm add @effect-libs/browser-cdp effect@4.0.0
 ```
 
-> **Effect v4 RC required.** This package requires the Effect v4 RC API and is incompatible with Effect v3 and prior Effect v4 beta APIs. No additional runtime dependencies required.
+> **Effect v4 required.** This package requires the Effect v4 API and is incompatible with Effect v3 and prior Effect v4 beta APIs. No additional runtime dependencies required.
 
 ## Resource acquisition
 

diff --git a/docs/packages/playwright/added-apis.md b/docs/packages/playwright/added-apis.md
@@ -105,15 +105,15 @@ values.
 ## `page.httpClient`
 
 `page.httpClient` is the Effect-native equivalent of `page.fetch`. It
-returns a `HttpClient.HttpClient` (from `effect/unstable/http`) that
+returns a `HttpClient.HttpClient` (from `effect/http`) that
 uses the browser's `fetch()` internally. This means you can compose it
 with the rest of the Effect HTTP toolkit — `filterStatusOk`,
 `retryTransient`, `schemaBodyJson`, middleware, etc.
 
 ```typescript
 import { Effect, Schedule } from "effect";
 import { Schema } from "effect";
-import { HttpClient, HttpClientResponse } from "effect/unstable/http";
+import { HttpClient, HttpClientResponse } from "effect/http";
 
 import { Playwright } from "@effect-libs/browser-playwright";
 

diff --git a/docs/packages/playwright/index.md b/docs/packages/playwright/index.md
@@ -7,12 +7,12 @@ Full upstream Playwright API on Cloudflare Workers and other edge runtimes. Chro
 ## Install
 
 ```bash
-pnpm add @effect-libs/browser-playwright effect@4.0.0-rc.115
+pnpm add @effect-libs/browser-playwright effect@4.0.0
 ```
 
 The Playwright runtime comes from `@effect-libs/cloudflare-playwright` (our maintained fork of `@cloudflare/playwright@1.3.0`) as a transitive direct dependency — no separate install command needed.
 
-> **Effect v4 RC required.** This package requires the Effect v4 RC API and is incompatible with Effect v3 and prior Effect v4 beta APIs.
+> **Effect v4 required.** This package requires the Effect v4 API and is incompatible with Effect v3 and prior Effect v4 beta APIs.
 
 ## Resource acquisition
 

diff --git a/docs/packages/stagehand/index.md b/docs/packages/stagehand/index.md
@@ -9,10 +9,10 @@ AI-powered browser automation with natural-language instructions. Stagehand v3 o
 ## Install
 
 ```bash
-pnpm add @effect-libs/browser-stagehand @browserbasehq/stagehand effect@4.0.0-rc.115
+pnpm add @effect-libs/browser-stagehand @browserbasehq/stagehand effect@4.0.0
 ```
 
-> **Effect v4 RC required.** This package requires the Effect v4 RC API and is incompatible with Effect v3 and prior Effect v4 beta APIs.
+> **Effect v4 required.** This package requires the Effect v4 API and is incompatible with Effect v3 and prior Effect v4 beta APIs.
 
 ## Resource acquisition
 

diff --git a/docs/providers/browserbase.md b/docs/providers/browserbase.md
@@ -5,10 +5,10 @@ Managed browser sessions with persistent contexts, proxies, and enterprise featu
 ## Install
 
 ```bash
-pnpm add @effect-libs/browser-providers @browserbasehq/sdk effect@4.0.0-rc.115
+pnpm add @effect-libs/browser-providers @browserbasehq/sdk effect@4.0.0
 ```
 
-> **Effect v4 RC required.** This package requires the Effect v4 RC API and is incompatible with Effect v3 and prior Effect v4 beta APIs. No additional dependencies. Browserbase uses the HTTP API.
+> **Effect v4 required.** This package requires the Effect v4 API and is incompatible with Effect v3 and prior Effect v4 beta APIs. No additional dependencies. Browserbase uses the HTTP API.
 
 ## Configuration
 

diff --git a/docs/providers/cf-browser-run.md b/docs/providers/cf-browser-run.md
@@ -10,10 +10,10 @@ Two `BrowserProvider` implementations for [Cloudflare Browser Rendering](https:/
 ### Install
 
 ```bash
-pnpm add @effect-libs/browser-providers cloudflare effect@4.0.0-rc.115
+pnpm add @effect-libs/browser-providers cloudflare effect@4.0.0
 ```
 
-> **Effect v4 RC required.** This package requires the Effect v4 RC API and is incompatible with Effect v3 and prior Effect v4 beta APIs.
+> **Effect v4 required.** This package requires the Effect v4 API and is incompatible with Effect v3 and prior Effect v4 beta APIs.
 
 ### Configuration
 
@@ -42,7 +42,7 @@ Direct browser access via Cloudflare Workers binding. No external HTTP calls —
 ### Install
 
 ```bash
-pnpm add @effect-libs/browser-providers @effect-libs/cloudflare-playwright effect@4.0.0-rc.115
+pnpm add @effect-libs/browser-providers @effect-libs/cloudflare-playwright effect@4.0.0
 ```
 
 ### Usage

diff --git a/docs/providers/index.md b/docs/providers/index.md
@@ -8,19 +8,19 @@ For help **picking** a provider (which one for what), see [Client & Provider →
 
 ```bash
 # Steel — needs steel-sdk
-pnpm add @effect-libs/browser-providers steel-sdk effect@4.0.0-rc.115
+pnpm add @effect-libs/browser-providers steel-sdk effect@4.0.0
 
 # Browserbase — needs @browserbasehq/sdk
-pnpm add @effect-libs/browser-providers @browserbasehq/sdk effect@4.0.0-rc.115
+pnpm add @effect-libs/browser-providers @browserbasehq/sdk effect@4.0.0
 
 # Cloudflare Browser Run (HTTP) — needs cloudflare
-pnpm add @effect-libs/browser-providers cloudflare effect@4.0.0-rc.115
+pnpm add @effect-libs/browser-providers cloudflare effect@4.0.0
 
 # Cloudflare Browser Run (binding) — needs `@effect-libs/cloudflare-playwright`; `browser-playwright` only
-pnpm add @effect-libs/browser-providers @effect-libs/cloudflare-playwright effect@4.0.0-rc.115
+pnpm add @effect-libs/browser-providers @effect-libs/cloudflare-playwright effect@4.0.0
 ```
 
-> **Effect v4 RC required.** This package requires the Effect v4 RC API and is incompatible with Effect v3 and prior Effect v4 beta APIs.
+> **Effect v4 required.** This package requires the Effect v4 API and is incompatible with Effect v3 and prior Effect v4 beta APIs.
 
 Don't want a provider? Connect to any Chrome DevTools Protocol URL with `playwright.withConnection({ url: "wss://…" })` — no provider package needed.
 

diff --git a/docs/providers/steel.md b/docs/providers/steel.md
@@ -5,10 +5,10 @@ Managed browser sessions with anti-bot bypass, CAPTCHA solving, and persistent c
 ## Install
 
 ```bash
-pnpm add @effect-libs/browser-providers steel-sdk effect@4.0.0-rc.115
+pnpm add @effect-libs/browser-providers steel-sdk effect@4.0.0
 ```
 
-> **Effect v4 RC required.** This package requires the Effect v4 RC API and is incompatible with Effect v3 and prior Effect v4 beta APIs.
+> **Effect v4 required.** This package requires the Effect v4 API and is incompatible with Effect v3 and prior Effect v4 beta APIs.
 
 ## Configuration
 

diff --git a/examples/cf-workers-alchemy/hackernews-cdp-wsUrl/package.json b/examples/cf-workers-alchemy/hackernews-cdp-wsUrl/package.json
@@ -16,7 +16,7 @@
     "@effect-libs/browser-cdp": "workspace:*",
     "@effect/platform-bun": "catalog:",
     "@effect/platform-node": "catalog:",
-    "alchemy": "2.0.0-beta.79",
+    "alchemy": "2.0.0-beta.81",
     "effect": "catalog:"
   },
   "devDependencies": {

diff --git a/examples/cf-workers-alchemy/hackernews-cdp-wsUrl/src/worker.ts b/examples/cf-workers-alchemy/hackernews-cdp-wsUrl/src/worker.ts
@@ -11,9 +11,9 @@
 import * as Cloudflare from "alchemy/Cloudflare";
 import { Config, Schema } from "effect";
 import * as Effect from "effect/Effect";
+import { HttpServerRequest } from "effect/http/HttpServerRequest";
+import * as HttpServerResponse from "effect/http/HttpServerResponse";
 import * as Redacted from "effect/Redacted";
-import { HttpServerRequest } from "effect/unstable/http/HttpServerRequest";
-import * as HttpServerResponse from "effect/unstable/http/HttpServerResponse";
 
 import { Cdp } from "@effect-libs/browser-cdp";
 

diff --git a/examples/cf-workers-alchemy/hackernews-playwright-wsUrl/package.json b/examples/cf-workers-alchemy/hackernews-playwright-wsUrl/package.json
@@ -16,7 +16,7 @@
     "@effect-libs/browser-playwright": "workspace:*",
     "@effect/platform-bun": "catalog:",
     "@effect/platform-node": "catalog:",
-    "alchemy": "2.0.0-beta.79",
+    "alchemy": "2.0.0-beta.81",
     "effect": "catalog:"
   },
   "devDependencies": {

diff --git a/examples/cf-workers-alchemy/hackernews-playwright-wsUrl/src/worker.ts b/examples/cf-workers-alchemy/hackernews-playwright-wsUrl/src/worker.ts
@@ -11,9 +11,9 @@
 import * as Cloudflare from "alchemy/Cloudflare";
 import { Config, Schema } from "effect";
 import * as Effect from "effect/Effect";
+import { HttpServerRequest } from "effect/http/HttpServerRequest";
+import * as HttpServerResponse from "effect/http/HttpServerResponse";
 import * as Redacted from "effect/Redacted";
-import { HttpServerRequest } from "effect/unstable/http/HttpServerRequest";
-import * as HttpServerResponse from "effect/unstable/http/HttpServerResponse";
 
 import { Playwright } from "@effect-libs/browser-playwright";
 

diff --git a/examples/cf-workers/hackernews-cdp-wsUrl/scripts/dev-chrome.ts b/examples/cf-workers/hackernews-cdp-wsUrl/scripts/dev-chrome.ts
@@ -13,8 +13,8 @@
 
 import { NodeServices, NodeRuntime, NodeHttpClient } from "@effect/platform-node";
 import { Effect, Schedule, Console, FileSystem, Stream, Layer, Schema } from "effect";
-import { HttpClient } from "effect/unstable/http";
-import { ChildProcess } from "effect/unstable/process";
+import { HttpClient } from "effect/http";
+import { ChildProcess } from "effect/process";
 
 // Minimal local schema for Chrome's /json/version response.
 // (The full CDP `ChromeVersionResponse` schema is an internal implementation

diff --git a/examples/cf-workers/hackernews-cdp-wsUrl/src/index.ts b/examples/cf-workers/hackernews-cdp-wsUrl/src/index.ts
@@ -20,7 +20,7 @@
  */
 
 import { Effect, Schema, Match, Cause } from "effect";
-import { HttpServerRequest } from "effect/unstable/http";
+import { HttpServerRequest } from "effect/http";
 
 import { Cdp } from "@effect-libs/browser-cdp";
 

diff --git a/examples/cf-workers/hackernews-playwright-wsUrl/src/index.ts b/examples/cf-workers/hackernews-playwright-wsUrl/src/index.ts
@@ -21,7 +21,7 @@
  */
 
 import { Effect, Schema, Match, Cause } from "effect";
-import { HttpServerRequest } from "effect/unstable/http";
+import { HttpServerRequest } from "effect/http";
 
 import { Playwright } from "@effect-libs/browser-playwright";
 

diff --git a/examples/cf-workers/hackernews-stagehand-cdp/src/index.ts b/examples/cf-workers/hackernews-stagehand-cdp/src/index.ts
@@ -19,7 +19,7 @@
  */
 
 import { Effect, Schema, Match, Cause } from "effect";
-import { HttpServerRequest } from "effect/unstable/http";
+import { HttpServerRequest } from "effect/http";
 
 import { Stagehand, toZodSchema } from "@effect-libs/browser-stagehand";
 

diff --git a/examples/cf-workers/hackernews-stagehand-playwright/src/index.ts b/examples/cf-workers/hackernews-stagehand-playwright/src/index.ts
@@ -11,7 +11,7 @@
  */
 
 import { Effect, Schema, Layer, Match, Cause } from "effect";
-import { HttpServerRequest } from "effect/unstable/http";
+import { HttpServerRequest } from "effect/http";
 
 import { Playwright } from "@effect-libs/browser-playwright";
 import { Stagehand, toZodSchema } from "@effect-libs/browser-stagehand";

diff --git a/oxlint.config.ts b/oxlint.config.ts
@@ -92,6 +92,31 @@ export default defineConfig({
     // Additional disables per project preference
     "effect/prefer-namespace-imports": "off",
 
+    /* 16 anti-slop rules added in @mpsuesser/oxlint-plugin-effect@0.5.0.
+     Ported from `dmmulroy/anti-slop` — a generic (non-Effect) ruleset that
+     both presets now enable by default, taking the rule count 57 → 73.
+     Adopting them is a lint-policy decision, not a dependency bump: on this
+     codebase they produce 1410 findings across 139 files, 73% of them
+     `require-safety-comment-for-type-assertion` (1024). Not adopted here —
+     revisit as its own policy migration. The other 57 rules are unchanged and
+     pass clean. */
+    "effect/no-chained-type-assertions": "off",
+    "effect/no-conditional-empty-object-spread": "off",
+    "effect/no-known-value-widening": "off",
+    "effect/no-module-mocking": "off",
+    "effect/no-object-parameters": "off",
+    "effect/no-reflect-apply": "off",
+    "effect/no-reflect-get": "off",
+    "effect/no-runtime-typeof": "off",
+    "effect/no-service-constructor-imports": "off",
+    "effect/no-shape-in-symbol-names": "off",
+    "effect/no-unknown-parameters": "off",
+    "effect/no-unknown-returns": "off",
+    "effect/no-unknown-type-aliases": "off",
+    "effect/no-unsafe-dictionary-type": "off",
+    "effect/no-widen-then-assert": "off",
+    "effect/require-safety-comment-for-type-assertion": "off",
+
     // Removed in @mpsuesser/oxlint-plugin-effect@0.4.x — no longer needed.
     // "effect/prefer-schema-class": "off",
   },

diff --git a/package.json b/package.json
@@ -58,11 +58,11 @@
     "@effect/platform-node": "catalog:",
     "@effect/tsgo": "latest",
     "@effect/vitest": "catalog:",
-    "@mpsuesser/oxlint-plugin-effect": "^0.4.3",
+    "@mpsuesser/oxlint-plugin-effect": "^0.6.0",
     "@types/bun": "^1.4.2",
     "@types/node": "catalog:",
     "@typescript/native-preview": "7.0.0-dev.20260707.2",
-    "@vitest/coverage-v8": "^4.1.11",
+    "@vitest/coverage-v8": "^5.0.4",
     "cloudflare": "latest",
     "devtools-protocol": "^0.0.1676105",
     "effect": "catalog:",
@@ -71,7 +71,7 @@
     "lint-staged": "^17.5.1",
     "mdast-util-to-string": "^4.0.0",
     "oxfmt": "^0.68.0",
-    "oxlint": "^1.83.0",
+    "oxlint": "^1.87.0",
     "playwright": "^1.60.0",
     "remark-gfm": "^4.0.1",
     "remark-parse": "^11.0.0",

diff --git a/packages/browser-cdp/README.md b/packages/browser-cdp/README.md
@@ -10,10 +10,10 @@ Fastly, Akamai).
 ## Install
 
 ```bash
-pnpm add @effect-libs/browser-cdp effect@4.0.0-rc.115
+pnpm add @effect-libs/browser-cdp effect@4.0.0
 ```
 
-> **Effect v4 RC required.** This package requires the Effect v4 RC API and is incompatible with Effect v3 and prior Effect v4 beta APIs. No additional runtime dependencies required.
+> **Effect v4 required.** This package requires the Effect v4 API and is incompatible with Effect v3 and prior Effect v4 beta APIs. No additional runtime dependencies required.
 
 ## AI / LLM usage
 

diff --git a/packages/browser-cdp/src/internal/CdpHttpClient.ts b/packages/browser-cdp/src/internal/CdpHttpClient.ts
@@ -10,7 +10,7 @@ import type { CdpError } from "../CdpError.js";
 import type { FetchOptions, FetchResponse } from "./CdpPage.js";
 
 import { Effect, Predicate } from "effect";
-import { HttpClient, HttpClientError, HttpClientResponse } from "effect/unstable/http";
+import { HttpClient, HttpClientError, HttpClientResponse } from "effect/http";
 
 // ── Types ──────────────────────────────────────────────────────────────────────
 

diff --git a/packages/browser-cdp/src/internal/CdpPage.ts b/packages/browser-cdp/src/internal/CdpPage.ts
@@ -5,7 +5,7 @@
 
 import type { Scope } from "effect";
 import type { Input as DurationInput } from "effect/Duration";
-import type { HttpClient } from "effect/unstable/http";
+import type { HttpClient } from "effect/http";
 
 import type { CdpError } from "../CdpError.js";
 import type { CdpContextHandle } from "../CdpTypes.js";

diff --git a/packages/browser-cdp/src/internal/Page/Request.ts b/packages/browser-cdp/src/internal/Page/Request.ts
@@ -21,7 +21,7 @@ import type { CdpCookie } from "../CdpSchema.js";
 
 import { Effect, Match, Predicate as P } from "effect";
 import * as Arr from "effect/Array";
-import { HttpClient, HttpClientError, HttpClientResponse } from "effect/unstable/http";
+import { HttpClient, HttpClientError, HttpClientResponse } from "effect/http";
 
 import { CookieError } from "../../CdpError.js";
 import { ensureSession } from "./EnsureSession.js";

diff --git a/packages/browser-playwright/README.md b/packages/browser-playwright/README.md
@@ -10,12 +10,12 @@ based on our fork of `@cloudflare/playwright` ([`@effect-libs/cloudflare-playwri
 ## Install
 
 ```bash
-pnpm add @effect-libs/browser-playwright effect@4.0.0-rc.115
+pnpm add @effect-libs/browser-playwright effect@4.0.0
 ```
 
 The Playwright runtime comes from `@effect-libs/cloudflare-playwright` (our maintained fork of `@cloudflare/playwright@1.3.0`). It's a direct dependency, so it installs transitively — no second `pnpm add` needed.
 
-> **Effect v4 RC required.** This package requires the Effect v4 RC API and is incompatible with Effect v3 and prior Effect v4 beta APIs.
+> **Effect v4 required.** This package requires the Effect v4 API and is incompatible with Effect v3 and prior Effect v4 beta APIs.
 
 ## Documentation