diff --git a/.github/CONTRIBUTING.md b/.github/CONTRIBUTING.md
new file mode 100644
index 0000000..05fe660
--- /dev/null
+++ b/.github/CONTRIBUTING.md
@@ -0,0 +1,162 @@
+# 📄 `CONTRIBUTING.md`
+
+````md
+# Contributing to vfetch
+
+Thanks for your interest in contributing.
+
+This project is designed to be **strict, predictable, and production-grade**. Contributions must follow the guidelines below to be accepted.
+
+---
+
+## 🛠️ Getting Started
+
+Clone the repo and install dependencies:
+
+```bash
+git clone https://github.com/Gab-codes/vfetch.git
+cd vfetch
+npm install
+```
+````
+
+Run tests:
+
+```bash
+npm run test
+```
+
+Run coverage:
+
+```bash
+npm run coverage
+```
+
+---
+
+## 📁 Project Structure
+
+```
+src/       → core implementation
+tests/     → unit tests
+tests/integration/ → integration tests
+```
+
+Do **not** mix concerns:
+
+- Unit tests stay in `tests/`
+- Full flow / real API tests go in `tests/integration/`
+
+---
+
+## 📏 Rules & Standards
+
+### 1. No breaking changes without discussion
+
+If your change alters behavior, open an issue first.
+
+---
+
+### 2. Tests are mandatory
+
+- Every feature or fix **must include tests**
+- No exceptions
+- If it’s not tested, it won’t be merged
+
+---
+
+### 3. Keep types strict
+
+- Avoid `any` unless absolutely necessary
+- Prefer explicit types
+- Maintain full TypeScript safety
+
+---
+
+### 4. Do not modify unrelated code
+
+Only change what your PR is responsible for.
+
+---
+
+### 5. Maintain existing design decisions
+
+This library prioritizes:
+
+- Predictable `{ ok: boolean }` responses
+- No throwing for HTTP errors
+- Transport-layer responsibility only (no schema validation)
+
+Do not introduce patterns that break this philosophy.
+
+---
+
+### 6. Keep it lightweight
+
+This is a **zero-dependency** library.
+
+Do not add dependencies unless absolutely justified.
+
+---
+
+## 🧪 Testing Guidelines
+
+- Use **Vitest**
+- Use mocks for controlled behavior
+- Keep tests isolated and deterministic
+- Avoid unnecessary real API calls (only in integration tests)
+
+---
+
+## 🚀 Pull Request Process
+
+1. Fork the repo
+2. Create a new branch:
+
+   ```bash
+   git checkout -b feat/your-feature
+   ```
+
+3. Make your changes
+4. Add/Update tests
+5. Ensure everything passes:
+
+   ```bash
+   npm run coverage
+   ```
+
+6. Open a PR
+
+---
+
+## ✅ PR Requirements
+
+- All tests must pass
+- Coverage must not decrease
+- No TypeScript errors
+- Clear description of what changed and why
+
+---
+
+## ❌ What Will Be Rejected
+
+- PRs without tests
+- Introducing unnecessary dependencies
+- Weak typing (`any` abuse)
+- Breaking core API design without discussion
+
+---
+
+## 💡 Philosophy
+
+vfetch is built to be:
+
+- Predictable
+- Lightweight
+- Safe under concurrency
+
+Keep that in mind when contributing.
+
+---
+
+## Thanks for contributing.
diff --git a/README.md b/README.md
index 5040a5a..28b95f3 100644
--- a/README.md
+++ b/README.md
@@ -368,6 +368,12 @@ const { mutate } = useMutation({
 
 ---
 
+## Contributing
+
+Contributions are welcome. Please read the [Contributing Guide](.github/CONTRIBUTING.md) before opening a PR.
+
+---
+
 ## 📄 License
 
-MIT
+MIT [License](LICENSE.md)
diff --git a/src/client.ts b/src/client.ts
index d583a1f..ea563b5 100644
--- a/src/client.ts
+++ b/src/client.ts
@@ -69,7 +69,7 @@ export class VfetchClient {
   /**
    * Internal request handler that implements the full request lifecycle.
    */
-  private async request<T>(
+  private async request<T = any>(
     path: string,
     options: RequestOptions & {
       method: string;
@@ -278,7 +278,7 @@ export class VfetchClient {
    * @param path - The URL path relative to baseURL
    * @param options - Optional request configuration
    */
-  async get<T>(path: string, options?: RequestOptions): Promise<VfetchResponse<T>> {
+  async get<T = any>(path: string, options?: RequestOptions): Promise<VfetchResponse<T>> {
     return this.request<T>(path, { ...options, method: "GET" });
   }
 
@@ -289,7 +289,7 @@ export class VfetchClient {
    * @param body - The request body, serialized as JSON
    * @param options - Optional request configuration
    */
-  async post<T>(path: string, body?: unknown, options?: RequestOptions): Promise<VfetchResponse<T>> {
+  async post<T = any>(path: string, body?: unknown, options?: RequestOptions): Promise<VfetchResponse<T>> {
     return this.request<T>(path, { ...options, method: "POST", body });
   }
 
@@ -300,7 +300,7 @@ export class VfetchClient {
    * @param body - The request body, serialized as JSON
    * @param options - Optional request configuration
    */
-  async patch<T>(path: string, body?: unknown, options?: RequestOptions): Promise<VfetchResponse<T>> {
+  async patch<T = any>(path: string, body?: unknown, options?: RequestOptions): Promise<VfetchResponse<T>> {
     return this.request<T>(path, { ...options, method: "PATCH", body });
   }
 
@@ -311,7 +311,7 @@ export class VfetchClient {
    * @param body - The request body, serialized as JSON
    * @param options - Optional request configuration
    */
-  async put<T>(path: string, body?: unknown, options?: RequestOptions): Promise<VfetchResponse<T>> {
+  async put<T = any>(path: string, body?: unknown, options?: RequestOptions): Promise<VfetchResponse<T>> {
     return this.request<T>(path, { ...options, method: "PUT", body });
   }
 
@@ -321,7 +321,7 @@ export class VfetchClient {
    * @param path - The URL path relative to baseURL
    * @param options - Optional request configuration
    */
-  async delete<T>(path: string, options?: RequestOptions): Promise<VfetchResponse<T>> {
+  async delete<T = any>(path: string, options?: RequestOptions): Promise<VfetchResponse<T>> {
     return this.request<T>(path, { ...options, method: "DELETE" });
   }
 }
diff --git a/src/index.ts b/src/index.ts
index 169efbc..0330f5f 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -15,11 +15,16 @@ import { VfetchConfig } from "./types";
  * ```ts
  * const api = createClient({
  *   baseURL: "https://api.example.com",
- *   timeout: 5000,
- *   retry: 3,
+ *   timeout: 5000,    // optional - request timeout in ms
+ *   retry: 3,         // optional - retry network failures up to 3 times
+ *   retryDelay: 1000,        // optional - delay between retries in ms
  * });
  *
+ * // With type annotation (fully typed)
  * const result = await api.get<User[]>("/users");
+ *
+ * // Without type annotation (response.data defaults to 'any')
+ * const result = await api.get("/users");
  * ```
  */
 export function createClient(config: VfetchConfig): VfetchClient {
diff --git a/src/types.ts b/src/types.ts
index 85483f0..4deb115 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -2,7 +2,7 @@
  * Represents a successful response from vfetch.
  * @template T The type of the data returned by the server.
  */
-export interface VfetchSuccess<T> {
+export interface VfetchSuccess<T = any> {
   /** Indicates the request was successful. */
   readonly ok: true;
   /** The parsed JSON data from the response. */
@@ -27,7 +27,7 @@ export interface VfetchError<E = string | Record<string, any>> {
 /**
  * The union type of all possible vfetch responses.
  */
-export type VfetchResponse<T> = VfetchSuccess<T> | VfetchError;
+export type VfetchResponse<T = any> = VfetchSuccess<T> | VfetchError;
 
 /**
  * Configuration options for the vfetch client instance.