diff --git a/.github/workflows/code-coverage.yml b/.github/workflows/code-coverage.yml
index c86b51c..4a692a2 100644
--- a/.github/workflows/code-coverage.yml
+++ b/.github/workflows/code-coverage.yml
@@ -1,6 +1,8 @@
 name: "code coverage"
 
-on: ["pull_request", "push"]
+on: 
+  pull_request: ~
+  push: ~
 
 jobs:
   code-coverage:
diff --git a/.github/workflows/coding-standards.yml b/.github/workflows/coding-standards.yml
index 1a6ec26..90d9ef3 100644
--- a/.github/workflows/coding-standards.yml
+++ b/.github/workflows/coding-standards.yml
@@ -1,6 +1,8 @@
 name: "coding standards"
 
-on: ["pull_request", "push"]
+on: 
+  pull_request: ~
+  push: ~
 
 jobs:
   coding-standards:
diff --git a/.github/workflows/documentation-check.yml b/.github/workflows/documentation-check.yml
index 10b43ea..ef2fbd0 100644
--- a/.github/workflows/documentation-check.yml
+++ b/.github/workflows/documentation-check.yml
@@ -1,6 +1,8 @@
 name: "documentation check"
 
-on: ["pull_request", "push"]
+on: 
+  pull_request: ~
+  push: ~
 
 jobs:
   doc-check:
diff --git a/.github/workflows/security-analysis.yml b/.github/workflows/security-analysis.yml
index 3e4a23d..6f716fd 100644
--- a/.github/workflows/security-analysis.yml
+++ b/.github/workflows/security-analysis.yml
@@ -1,6 +1,8 @@
 name: "security analysis"
 
-on: ["pull_request", "push"]
+on: 
+  pull_request: ~
+  push: ~
 
 jobs:
   security-analysis:
diff --git a/.github/workflows/static-analysis.yml b/.github/workflows/static-analysis.yml
index dc23072..8ba6e07 100644
--- a/.github/workflows/static-analysis.yml
+++ b/.github/workflows/static-analysis.yml
@@ -1,6 +1,10 @@
 name: "static analysis"
 
-on: ["pull_request", "push"]
+on: 
+  pull_request: ~
+  push: ~
+  schedule:
+    - cron: '0 */3 * * *'
 
 jobs:
   static-analysis:
diff --git a/.github/workflows/unit-tests.yml b/.github/workflows/unit-tests.yml
index 53b9cc4..d75d4c6 100644
--- a/.github/workflows/unit-tests.yml
+++ b/.github/workflows/unit-tests.yml
@@ -1,6 +1,8 @@
 name: "unit tests"
 
-on: ["pull_request", "push"]
+on: 
+  pull_request: ~
+  push: ~
 
 jobs:
   unit-tests:
diff --git a/docs/component/hash.md b/docs/component/hash.md
index 2e9cf01..1368287 100644
--- a/docs/component/hash.md
+++ b/docs/component/hash.md
@@ -14,7 +14,7 @@
 
 - [algorithms](./../../src/Psl/Hash/algorithms.php#L16)
 - [equals](./../../src/Psl/Hash/equals.php#L14)
-- [hash](./../../src/Psl/Hash/hash.php#L16)
+- [hash](./../../src/Psl/Hash/hash.php#L17)
 
 #### `Classes`
 
diff --git a/psalm.xml b/psalm.xml
index cb7d623..fb143f8 100644
--- a/psalm.xml
+++ b/psalm.xml
@@ -1,71 +1,52 @@
 <?xml version="1.0"?>
-<psalm
-        totallyTyped="true"
-        resolveFromConfigFile="true"
-        forbidEcho="true"
-        strictBinaryOperands="true"
-        phpVersion="7.4"
-        allowPhpStormGenerics="true"
-        allowStringToStandInForClass="true"
-        rememberPropertyAssignmentsAfterCall="false"
-        skipChecksOnUnresolvableIncludes="false"
-        checkForThrowsDocblock="true"
-        checkForThrowsInGlobalScope="true"
-        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-        xmlns="https://getpsalm.org/schema/config"
-        xsi:schemaLocation="https://getpsalm.org/schema/config vendor/vimeo/psalm/config.xsd"
->
+<psalm totallyTyped="true" resolveFromConfigFile="true" forbidEcho="true" strictBinaryOperands="true" phpVersion="7.4" allowPhpStormGenerics="true" allowStringToStandInForClass="true" rememberPropertyAssignmentsAfterCall="false" skipChecksOnUnresolvableIncludes="false" checkForThrowsDocblock="true" checkForThrowsInGlobalScope="true" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="https://getpsalm.org/schema/config" xsi:schemaLocation="https://getpsalm.org/schema/config vendor/vimeo/psalm/config.xsd">
     <projectFiles>
         <directory name="src" />
         <directory name="integration" />
         <ignoreFiles>
             <directory name="vendor" />
-            <file name="src/bootstrap.php"/>
-            <file name="src/preload.php"/>
-            <file name="src/Psl/Internal/Loader.php"/>
+            <file name="src/bootstrap.php" />
+            <file name="src/preload.php" />
+            <file name="src/Psl/Internal/Loader.php" />
         </ignoreFiles>
     </projectFiles>
 
     <issueHandlers>
         <DuplicateFunction errorLevel="suppress" />
 
-        <LessSpecificReturnType errorLevel="error"/>
-        <DeprecatedMethod errorLevel="error"/>
-        <DeprecatedProperty errorLevel="error"/>
-        <DeprecatedClass errorLevel="error"/>
-        <DeprecatedConstant errorLevel="error"/>
-        <DeprecatedInterface errorLevel="error"/>
-        <DeprecatedTrait errorLevel="error"/>
-        <ForbiddenCode errorLevel="error"/>
-        <InternalMethod errorLevel="error"/>
-        <InternalProperty errorLevel="error"/>
-        <InternalClass errorLevel="error"/>
-        <MissingClosureReturnType errorLevel="error"/>
-        <MissingReturnType errorLevel="error"/>
-        <MissingPropertyType errorLevel="error"/>
-        <InvalidDocblock errorLevel="error"/>
-        <PropertyNotSetInConstructor errorLevel="error"/>
-        <MissingConstructor errorLevel="error"/>
-        <MissingClosureParamType errorLevel="error"/>
-        <MissingParamType errorLevel="error"/>
-        <DocblockTypeContradiction errorLevel="error"/>
-        <RawObjectIteration errorLevel="error"/>
-        <InvalidStringClass errorLevel="error"/>
-        <UnresolvableInclude errorLevel="error"/>
+        <LessSpecificReturnType errorLevel="error" />
+        <DeprecatedMethod errorLevel="error" />
+        <DeprecatedProperty errorLevel="error" />
+        <DeprecatedClass errorLevel="error" />
+        <DeprecatedConstant errorLevel="error" />
+        <DeprecatedInterface errorLevel="error" />
+        <DeprecatedTrait errorLevel="error" />
+        <ForbiddenCode errorLevel="error" />
+        <InternalMethod errorLevel="error" />
+        <InternalProperty errorLevel="error" />
+        <InternalClass errorLevel="error" />
+        <MissingClosureReturnType errorLevel="error" />
+        <MissingReturnType errorLevel="error" />
+        <MissingPropertyType errorLevel="error" />
+        <InvalidDocblock errorLevel="error" />
+        <PropertyNotSetInConstructor errorLevel="error" />
+        <MissingConstructor errorLevel="error" />
+        <MissingClosureParamType errorLevel="error" />
+        <MissingParamType errorLevel="error" />
+        <DocblockTypeContradiction errorLevel="error" />
+        <RawObjectIteration errorLevel="error" />
+        <InvalidStringClass errorLevel="error" />
+        <UnresolvableInclude errorLevel="error" />
 
         <!-- Redundant expressions should not be considered errors. -->
         <!-- Sometimes we want to enforce things at runtime, as well using static analysis -->
-        <RedundantConditionGivenDocblockType errorLevel="suppress"/>
-        <RedundantCondition errorLevel="suppress"/>
-        <RedundantCast errorLevel="suppress"/>
-        <RedundantCastGivenDocblockType errorLevel="suppress"/>
-
-        <!-- Not using the result of pure functions is common within PSL -->
-        <!-- e.g: with and Psl\invariant_violations() -->
-        <UnusedFunctionCall errorLevel="suppress" />
+        <RedundantConditionGivenDocblockType errorLevel="suppress" />
+        <RedundantCondition errorLevel="suppress" />
+        <RedundantCast errorLevel="suppress" />
+        <RedundantCastGivenDocblockType errorLevel="suppress" />
     </issueHandlers>
 
     <plugins>
-        <pluginClass class="Psl\Integration\Psalm\Plugin"/>
+        <pluginClass class="Psl\Integration\Psalm\Plugin" />
     </plugins>
 </psalm>
diff --git a/src/Psl/Hash/Context.php b/src/Psl/Hash/Context.php
index 5612fc7..e3c39c1 100644
--- a/src/Psl/Hash/Context.php
+++ b/src/Psl/Hash/Context.php
@@ -84,11 +84,18 @@ final class Context
      * Pump data into an active hashing context.
      *
      * @psalm-mutation-free
+     *
+     * @throws Exception\RuntimeException If unable to pump data into the active hashing context.
      */
     public function update(string $data): Context
     {
         $internal_context = hash_copy($this->internalContext);
-        hash_update($internal_context, $data);
+
+        // @codeCoverageIgnoreStart
+        if (!hash_update($internal_context, $data)) {
+            throw new Exception\RuntimeException('Unable to pump data into the active hashing context.');
+        }
+        // @codeCoverageIgnoreEnd
 
         return new self($internal_context);
     }
diff --git a/src/Psl/Hash/Exception/ExceptionInterface.php b/src/Psl/Hash/Exception/ExceptionInterface.php
new file mode 100644
index 0000000..bc5601a
--- /dev/null
+++ b/src/Psl/Hash/Exception/ExceptionInterface.php
@@ -0,0 +1,11 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Psl\Hash\Exception;
+
+use Psl\Exception;
+
+interface ExceptionInterface extends Exception\ExceptionInterface
+{
+}
diff --git a/src/Psl/Hash/Exception/RuntimeException.php b/src/Psl/Hash/Exception/RuntimeException.php
new file mode 100644
index 0000000..7ce62c7
--- /dev/null
+++ b/src/Psl/Hash/Exception/RuntimeException.php
@@ -0,0 +1,11 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Psl\Hash\Exception;
+
+use Psl\Exception;
+
+class RuntimeException extends Exception\RuntimeException implements ExceptionInterface
+{
+}
diff --git a/src/Psl/Hash/Hmac/hash.php b/src/Psl/Hash/Hmac/hash.php
index 96df264..851ed15 100644
--- a/src/Psl/Hash/Hmac/hash.php
+++ b/src/Psl/Hash/Hmac/hash.php
@@ -11,6 +11,7 @@ use Psl\Hash;
  * Generate a keyed hash value using the HMAC method.
  *
  * @throws Psl\Exception\InvariantViolationException If the given algorithm is unsupported.
+ * @throws Hash\Exception\RuntimeException If unable to pump data into the hashing context.
  *
  * @pure
  */
diff --git a/src/Psl/Hash/hash.php b/src/Psl/Hash/hash.php
index b18f7fe..71b2ad1 100644
--- a/src/Psl/Hash/hash.php
+++ b/src/Psl/Hash/hash.php
@@ -10,6 +10,7 @@ use Psl;
  * Generate a hash value (message digest).
  *
  * @throws Psl\Exception\InvariantViolationException If the given algorithm is unsupported.
+ * @throws Exception\RuntimeException If unable to pump data into the hashing context.
  *
  * @pure
  */
diff --git a/src/Psl/Internal/Loader.php b/src/Psl/Internal/Loader.php
index 3586ebf..f1ac854 100644
--- a/src/Psl/Internal/Loader.php
+++ b/src/Psl/Internal/Loader.php
@@ -612,6 +612,8 @@ final class Loader
         'Psl\Type\Type',
         'Psl\Json\Exception\DecodeException',
         'Psl\Json\Exception\EncodeException',
+        'Psl\Hash\Exception\ExceptionInterface',
+        'Psl\Hash\Exception\RuntimeException',
         'Psl\Hash\Context',
         'Psl\Encoding\Exception\IncorrectPaddingException',
         'Psl\Encoding\Exception\RangeException',
diff --git a/src/Psl/Internal/validate_offset.php b/src/Psl/Internal/validate_offset.php
index 5e3c36f..252ddbe 100644
--- a/src/Psl/Internal/validate_offset.php
+++ b/src/Psl/Internal/validate_offset.php
@@ -17,8 +17,10 @@ use Psl;
  * @throws Psl\Exception\InvariantViolationException If the offset is out-of-bounds.
  *
  * @internal
+ *
+ * @return ($assert is true ? bool : int)
  */
-function validate_offset(int $offset, int $length): int
+function validate_offset(int $offset, int $length, bool $assert = false)
 {
     $original_offset = $offset;
 
@@ -28,5 +30,9 @@ function validate_offset(int $offset, int $length): int
 
     Psl\invariant($offset >= 0 && $offset <= $length, 'Offset (%d) was out-of-bounds.', $original_offset);
 
-    return $offset;
+    if (!$assert) {
+        return $offset;
+    }
+
+    return true;
 }
diff --git a/src/Psl/Str/Byte/contains.php b/src/Psl/Str/Byte/contains.php
index ba1227f..5663cc2 100644
--- a/src/Psl/Str/Byte/contains.php
+++ b/src/Psl/Str/Byte/contains.php
@@ -21,9 +21,7 @@ use Psl;
 function contains(string $haystack, string $needle, int $offset = 0): bool
 {
     if ('' === $needle) {
-        Psl\Internal\validate_offset($offset, length($haystack));
-
-        return true;
+        return Psl\Internal\validate_offset($offset, length($haystack), true);
     }
 
     return null !== search($haystack, $needle, $offset);
diff --git a/src/Psl/Str/Byte/contains_ci.php b/src/Psl/Str/Byte/contains_ci.php
index a2c75d4..4b1f22e 100644
--- a/src/Psl/Str/Byte/contains_ci.php
+++ b/src/Psl/Str/Byte/contains_ci.php
@@ -20,10 +20,9 @@ use Psl;
  */
 function contains_ci(string $haystack, string $needle, int $offset = 0): bool
 {
+    $length = length($haystack);
     if ('' === $needle) {
-        Psl\Internal\validate_offset($offset, length($haystack));
-
-        return true;
+        return Psl\Internal\validate_offset($offset, $length, true);
     }
 
     return null !== search_ci($haystack, $needle, $offset);
diff --git a/src/Psl/Str/Grapheme/contains.php b/src/Psl/Str/Grapheme/contains.php
index 2c81b57..7c817e5 100644
--- a/src/Psl/Str/Grapheme/contains.php
+++ b/src/Psl/Str/Grapheme/contains.php
@@ -21,9 +21,7 @@ use Psl;
 function contains(string $haystack, string $needle, int $offset = 0): bool
 {
     if ('' === $needle) {
-        Psl\Internal\validate_offset($offset, length($haystack));
-
-        return true;
+        return Psl\Internal\validate_offset($offset, length($haystack), true);
     }
 
     return null !== search($haystack, $needle, $offset);
diff --git a/src/Psl/Str/Grapheme/contains_ci.php b/src/Psl/Str/Grapheme/contains_ci.php
index 68b765b..4ddbd85 100644
--- a/src/Psl/Str/Grapheme/contains_ci.php
+++ b/src/Psl/Str/Grapheme/contains_ci.php
@@ -21,9 +21,7 @@ use Psl;
 function contains_ci(string $haystack, string $needle, int $offset = 0): bool
 {
     if ('' === $needle) {
-        Psl\Internal\validate_offset($offset, length($haystack));
-
-        return true;
+        return Psl\Internal\validate_offset($offset, length($haystack), true);
     }
 
     return null !== search_ci($haystack, $needle, $offset);
diff --git a/src/Psl/Str/contains.php b/src/Psl/Str/contains.php
index de01a5b..ef9cc03 100644
--- a/src/Psl/Str/contains.php
+++ b/src/Psl/Str/contains.php
@@ -42,9 +42,7 @@ use Psl;
 function contains(string $haystack, string $needle, int $offset = 0, ?string $encoding = null): bool
 {
     if ('' === $needle) {
-        Psl\Internal\validate_offset($offset, length($haystack, $encoding));
-
-        return true;
+        return Psl\Internal\validate_offset($offset, length($haystack, $encoding), true);
     }
 
     return null !== search($haystack, $needle, $offset, $encoding);
diff --git a/src/Psl/Str/contains_ci.php b/src/Psl/Str/contains_ci.php
index 6833dfb..8fb2b61 100644
--- a/src/Psl/Str/contains_ci.php
+++ b/src/Psl/Str/contains_ci.php
@@ -42,9 +42,7 @@ use Psl;
 function contains_ci(string $haystack, string $needle, int $offset = 0, ?string $encoding = null): bool
 {
     if ('' === $needle) {
-        Psl\Internal\validate_offset($offset, length($haystack, $encoding));
-
-        return true;
+        return Psl\Internal\validate_offset($offset, length($haystack, $encoding), true);
     }
 
     return null !== search_ci($haystack, $needle, $offset, $encoding);