diff --git a/docs/combinators.md b/docs/combinators.md
index de8ddb4..7cdc179 100644
--- a/docs/combinators.md
+++ b/docs/combinators.md
@@ -35,93 +35,6 @@ $empty = $io->filter(fn($x) => $x < 40);
 $result = $empty->unsafeRun(); // throws NoSuchElementException
 ```
 
-## Sequence and Traverse
-
-These combinators help you work with collections of effects.
-
-### Sequence
-
-`sequence` transforms a collection of effects into an effect of a collection:
-
-```php
-use function Phunkie\Effect\Functions\io\io;
-
-$ios = [
-    io(function() { return 1; }),
-    io(function() { return 2; }),
-    io(function() { return 3; })
-];
-
-$result = sequence($ios)->unsafeRun(); // [1, 2, 3]
-```
-
-### Traverse
-
-`traverse` is like `sequence` but allows you to transform each value before sequencing:
-
-```php
-use function Phunkie\Effect\Functions\io\io;
-
-$numbers = [1, 2, 3];
-
-$result = traverse($numbers, fn($n) => 
-    io(function() use ($n) { 
-        return $n * 2; 
-    })
-)->unsafeRun(); // [2, 4, 6]
-```
-
-## Race and Timeout
-
-These combinators help you handle concurrent operations and timeouts.
-
-### Race
-
-`race` runs two effects concurrently and returns the result of the first one to complete:
-
-```php
-use function Phunkie\Effect\Functions\io\io;
-use function Phunkie\Effect\Functions\blocking\blocking;
-
-$fast = io(function() {
-    return blocking(function() {
-        usleep(100000); // 0.1 seconds
-        return "fast";
-    });
-});
-
-$slow = io(function() {
-    return blocking(function() {
-        usleep(200000); // 0.2 seconds
-        return "slow";
-    });
-});
-
-$result = $fast->race($slow)->unsafeRun(); // "fast"
-```
-
-### Timeout
-
-`timeout` adds a timeout to an effect, failing if it takes too long:
-
-```php
-use function Phunkie\Effect\Functions\io\io;
-use function Phunkie\Effect\Functions\blocking\blocking;
-
-$slow = io(function() {
-    return blocking(function() {
-        sleep(2);
-        return "done";
-    });
-});
-
-try {
-    $result = $slow->timeout(1000)->unsafeRun(); // throws TimeoutException
-} catch (\Exception $e) {
-    // Handle timeout
-}
-```
-
 ## Error Handling
 
 Combinators also provide ways to handle errors in effects.
@@ -195,67 +108,3 @@ $message = $result->fold(fn($error) => $error->getMessage())(fn($value) => "ok:
    $result = $value * 2;
    ```
 
-2. **Use Sequence for Collections**
-   ```php
-   // Good: Using sequence for collections
-   $results = sequence($ios)->unsafeRun();
-
-   // Bad: Manual sequencing
-   $results = [];
-   foreach ($ios as $io) {
-       $results[] = $io->unsafeRun();
-   }
-   ```
-
-3. **Use Race for Concurrent Operations**
-   ```php
-   // Good: Using race for concurrent operations
-   $result = $operation1->race($operation2)->unsafeRun();
-
-   // Bad: Manual concurrent execution
-   $handle1 = $operation1->unsafeRun();
-   $handle2 = $operation2->unsafeRun();
-   $result = $handle1->await(); // Might wait unnecessarily
-   ```
-
-4. **Use Timeout for Long-Running Operations**
-   ```php
-   // Good: Using timeout for long-running operations
-   $result = $operation->timeout(1000)->unsafeRun();
-
-   // Bad: No timeout
-   $result = $operation->unsafeRun(); // Might hang indefinitely
-   ```
-
-5. **Use Error Handling Combinators**
-   ```php
-   // Good: Using error handling combinators
-   $result = $risky->handleError(fn($e) => "fallback")->unsafeRun();
-
-   // Bad: Try-catch blocks
-   try {
-       $result = $risky->unsafeRun();
-   } catch (\Exception $e) {
-       $result = "fallback";
-   }
-   ```
-
-Remember that combinators are designed to work together. You can chain them to create complex effect compositions:
-
-```php
-$result = $io
-    ->map(fn($x) => $x * 2)
-    ->filter(fn($x) => $x > 10)
-    ->timeout(1000)
-    ->handleError(fn($e) => 0)
-    ->unsafeRun();
-```
-
-This composition:
-1. Doubles the value
-2. Filters out values less than 10
-3. Times out after 1 second
-4. Returns 0 if any error occurs
-5. Executes the entire chain
-
-The power of combinators lies in their ability to compose effects in a declarative way, making your code more readable and maintainable. 
\ No newline at end of file
diff --git a/docs/concurrency.md b/docs/concurrency.md
index 34e29a3..7959f8e 100644
--- a/docs/concurrency.md
+++ b/docs/concurrency.md
@@ -207,130 +207,11 @@ Remember that parallel execution is not a silver bullet. Consider:
 
 When in doubt, prefer simpler concurrency models like fibers for I/O operations and only use parallel execution for CPU-intensive tasks that benefit from true parallelism.
 
-## Sequence and Traverse
-
-These combinators help you work with collections of effects:
-
-### Sequence
-```php
-use function Phunkie\Effect\Functions\io\io;
-
-$ios = [
-    io(function() { return 1; }),
-    io(function() { return 2; }),
-    io(function() { return 3; })
-];
-
-$result = sequence($ios)->unsafeRun(); // [1, 2, 3]
-```
-
-### Traverse
-```php
-use function Phunkie\Effect\Functions\io\io;
-
-$numbers = [1, 2, 3];
-
-$result = traverse($numbers, fn($n) => 
-    io(function() use ($n) { 
-        return $n * 2; 
-    })
-)->unsafeRun(); // [2, 4, 6]
-```
-
-## Race, Both, Either
-
-These combinators help you handle concurrent operations in different ways:
-
-### Race
-```php
-$fast = io(function() {
-    return blocking(function() {
-        usleep(100000); // 0.1 seconds
-        return "fast";
-    });
-});
-
-$slow = io(function() {
-    return blocking(function() {
-        usleep(200000); // 0.2 seconds
-        return "slow";
-    });
-});
-
-$result = $fast->race($slow)->unsafeRun(); // "fast"
-```
-
-### Both
-```php
-$result = $operation1->both($operation2)->unsafeRun();
-// Returns [result1, result2]
-```
-
-### Either
-```php
-$result = $operation1->either($operation2)->unsafeRun();
-// Returns Left(result1) or Right(result2)
-```
-
-## Cancellation
-
-Cancellation allows you to stop operations that are no longer needed:
-
-```php
-$operation = io(function() {
-    return blocking(function() {
-        sleep(10);
-        return "done";
-    });
-});
-
-$handle = $operation->unsafeRun();
-// ... some time later ...
-$handle->cancel();
-```
-
-## Delay
-
-Delay allows you to schedule operations to run after a specified time:
-
-```php
-$operation = io(function() {
-    return blocking(function() {
-        return "delayed";
-    });
-});
-
-$result = $operation->delay(1000)->unsafeRun(); // Runs after 1 second
-```
-
-## Channels
-
-Channels provide a way to communicate between concurrent operations:
-
-```php
-$channel = new Channel();
-
-$producer = io(function() use ($channel) {
-    return blocking(function() use ($channel) {
-        $channel->send("message");
-    });
-});
-
-$consumer = io(function() use ($channel) {
-    return blocking(function() use ($channel) {
-        return $channel->receive();
-    });
-});
-
-$result = $producer->both($consumer)->unsafeRun();
-```
-
 ## Best Practices
 
 1. **Choose the Right Execution Context**
    - Use Fiber context for I/O operations
    - Use Parallel context for CPU-intensive tasks
-   - Use Process context for isolated operations
 
 2. **Handle Resources Properly**
    ```php
@@ -350,29 +231,3 @@ $result = $producer->both($consumer)->unsafeRun();
    $result = $operation1->flatMap(fn($a) => $operation2->map(fn($b) => $a + $b));
    ```
 
-4. **Handle Cancellation**
-   ```php
-   $handle = $operation->unsafeRun();
-   try {
-       $result = $handle->await();
-   } catch (CancellationException $e) {
-       // Handle cancellation
-   }
-   ```
-
-5. **Use Error Handling**
-   ```php
-   $result = $operation
-       ->handleError(fn($e) => "fallback")
-       ->timeout(1000)
-       ->unsafeRun();
-   ```
-
-Remember that concurrency is a powerful tool, but it comes with complexity. Always consider:
-- Resource management
-- Error handling
-- Cancellation
-- Timeouts
-- State management
-
-The key is to use the right tool for the job and handle all edge cases appropriately. 
\ No newline at end of file
diff --git a/docs/index.md b/docs/index.md
index 3eaa174..78e4fa9 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -49,18 +49,10 @@ Master the fundamental building blocks:
    - Blockers
    - Execution Context
    - Parallel Execution
-   - Sequence and Traverse
-   - Race, Both, Either
-   - Cancellation
-   - Delay
-   - Channels
 
 ### 6. [Resources](resources.md)
    - Brackets
-   - Resource Combinators
-   - Files
-   - URL
-   - Database
+   - Files, database and network connections
 
 ## Contributing
 
diff --git a/docs/io.md b/docs/io.md
index caaafb5..978227d 100644
--- a/docs/io.md
+++ b/docs/io.md
@@ -131,20 +131,6 @@ $workflow = readConfig('config.json')
     ->flatMap(fn($users) => sendEmails($users));
 ```
 
-### productR (*>) - Sequence and Discard First
-
-```php
-// Run both effects, keep only the second result
-$program = writeLog('Starting...')
-    ->productR(performOperation())
-    ->productR(writeLog('Done'));
-
-// Equivalent to:
-$program = writeLog('Starting...')
-    ->flatMap(fn($_) => performOperation())
-    ->flatMap(fn($result) => writeLog('Done')->map(fn($_) => $result));
-```
-
 ## Combining IO
 
 ### Sequential Composition
@@ -318,7 +304,7 @@ plain `for { $x <- io } yield ...` (no guard) works as usual, desugaring to
 $program = fetchFromApi()
     ->flatMap(fn($data) => io(fn() => processData($data)))
     ->handleErrorWith(fn($error) => io(fn() => logError($error))
-        ->productR(io(fn() => getDefaultData())));
+        ->flatMap(fn() => io(fn() => getDefaultData())));
 ```
 
 ## Running IO
diff --git a/docs/resources.md b/docs/resources.md
index a5429af..5a13cf8 100644
--- a/docs/resources.md
+++ b/docs/resources.md
@@ -48,41 +48,6 @@ $result = bracket(
 )->unsafeRun();
 ```
 
-### BracketCase
-
-`bracketCase` allows different cleanup strategies based on how the resource was used:
-
-```php
-$result = bracketCase(
-    blocking(function() { return openFile(); }),
-    function($file) { return readFile($file); },
-    function($file, $exitCase) {
-        return match($exitCase) {
-            ExitCase::Completed => closeFile($file),
-            ExitCase::Error => closeAndLogError($file),
-            ExitCase::Cancelled => closeAndNotify($file)
-        };
-    }
-)->unsafeRun();
-```
-
-### BracketE
-
-`bracketE` combines error handling with resource management:
-
-```php
-$result = bracketE(
-    blocking(function() { return openConnection(); }),
-    function($conn) { return useConnection($conn); },
-    function($conn, $error) {
-        return match($error) {
-            null => closeConnection($conn),
-            default => closeAndLogError($conn, $error)
-        };
-    }
-)->unsafeRun();
-```
-
 ## Common Resource Patterns
 
 ### File Operations
@@ -159,36 +124,7 @@ $result = bracket(
    }
    ```
 
-2. **Handle Errors in Release**
-   ```php
-   $result = bracketE(
-       blocking(function() { return openResource(); }),
-       function($r) { return useResource($r); },
-       function($r, $error) {
-           return match($error) {
-               null => closeResource($r),
-               default => closeAndLogError($r, $error)
-           };
-       }
-   );
-   ```
-
-3. **Use Appropriate Cleanup Strategies**
-   ```php
-   $result = bracketCase(
-       blocking(function() { return openResource(); }),
-       function($r) { return useResource($r); },
-       function($r, $exitCase) {
-           return match($exitCase) {
-               ExitCase::Completed => closeResource($r),
-               ExitCase::Error => closeAndLogError($r),
-               ExitCase::Cancelled => closeAndNotify($r)
-           };
-       }
-   );
-   ```
-
-4. **Compose Resource Operations**
+2. **Compose Resource Operations**
    ```php
    $result = bracket(
        blocking(function() { return openResource(); }),
@@ -203,13 +139,12 @@ $result = bracket(
    );
    ```
 
-5. **Handle Resource Limits**
+3. **Handle Resource Limits**
    ```php
    $result = bracket(
        blocking(function() { return openResource(); }),
        function($r) {
            return $operation
-               ->timeout(1000)
                ->handleError(fn($e) => "fallback");
        },
        function($r) { return closeResource($r); }