diff --git a/VERSION b/VERSION
index c5fd99e..58214c6 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-0.2410.32039
+0.2410.32326
diff --git a/src/Http/Routing/Router.php b/src/Http/Routing/Router.php
index c05cce9..8574171 100644
--- a/src/Http/Routing/Router.php
+++ b/src/Http/Routing/Router.php
@@ -1,7 +1,7 @@
 <?php
 // Router.php
 // Created: 2024-03-28
-// Updated: 2024-10-02
+// Updated: 2024-10-03
 
 namespace Index\Http\Routing;
 
@@ -9,6 +9,9 @@ use InvalidArgumentException;
 use RuntimeException;
 use Index\Http\HttpRequest;
 
+/**
+ * Provides an interface for defining HTTP routers.
+ */
 interface Router {
     /**
      * Creates a scoped version of this router.
diff --git a/src/Urls/ArrayUrlRegistry.php b/src/Urls/ArrayUrlRegistry.php
new file mode 100644
index 0000000..31ea612
--- /dev/null
+++ b/src/Urls/ArrayUrlRegistry.php
@@ -0,0 +1,123 @@
+<?php
+// ArrayUrlRegistry.php
+// Created: 2024-10-03
+// Updated: 2024-10-03
+
+namespace Index\Urls;
+
+use InvalidArgumentException;
+use Stringable;
+
+/**
+ * Provides an array backed URL registry implementation.
+ */
+class ArrayUrlRegistry implements UrlRegistry {
+    /** @var array<string, array{path: string, query: array<string, string>, fragment: string}> */
+    private array $urls = [];
+
+    public function register(string $name, string $path, array $query = [], string $fragment = ''): void {
+        if(array_key_exists($name, $this->urls))
+            throw new InvalidArgumentException('A URL format with $name has already been registered.');
+        if($path === '')
+            throw new InvalidArgumentException('$path may not be empty.');
+        if($path[0] !== '/')
+            throw new InvalidArgumentException('$path must begin with /.');
+
+        $this->urls[$name] = [
+            'path' => $path,
+            'query' => $query,
+            'fragment' => $fragment,
+        ];
+    }
+
+    public function format(string $name, array $vars = [], bool $spacesAsPlus = false): string {
+        if(!array_key_exists($name, $this->urls))
+            return '';
+
+        $format = $this->urls[$name];
+        $string = self::replaceVariables($format['path'], $vars);
+
+        if(!empty($format['query'])) {
+            $query = [];
+            foreach($format['query'] as $name => $value) {
+                $value = self::replaceVariables($value, $vars);
+                if($value !== '' && !($name === 'page' && (int)$value <= 1))
+                    $query[$name] = $value;
+            }
+
+            if(!empty($query))
+                $string .= '?' . http_build_query($query, '', '&', $spacesAsPlus ? PHP_QUERY_RFC1738 : PHP_QUERY_RFC3986);
+        }
+
+        if(!empty($format['fragment'])) {
+            $fragment = self::replaceVariables($format['fragment'], $vars);
+            if($fragment !== '')
+                $string .= '#' . $fragment;
+        }
+
+        return $string;
+    }
+
+    /**
+     * Formats a component template.
+     *
+     * @param string $str Template string.
+     * @param array<string, mixed> $vars Replacement variables.
+     * @return string Formatted string.
+     */
+    private static function replaceVariables(string $str, array $vars): string {
+        // i: have no idea what i'm doing
+        // i: still don't i literally copy pasted this from Misuzu lmao
+        $out = '';
+        $varName = '';
+        $inVarName = false;
+
+        $length = strlen($str);
+        for($i = 0; $i < $length; ++$i) {
+            $char = $str[$i];
+
+            if($inVarName) {
+                if($char === '>') {
+                    $inVarName = false;
+                    if(array_key_exists($varName, $vars)) {
+                        $varValue = $vars[$varName];
+                        if(is_array($varValue))
+                            $varValue = empty($varValue) ? '' : implode(',', $varValue);
+                        elseif(is_int($varValue))
+                            $varValue = ($varName === 'page' ? $varValue < 2 : $varValue === 0) ? '' : (string)$varValue;
+                        elseif(is_scalar($varValue) || $varValue instanceof Stringable)
+                            $varValue = (string)$varValue;
+                        else
+                            $varValue = '';
+                    } else
+                        $varValue = '';
+
+                    $out .= $varValue;
+                    $varName = '';
+                    continue;
+                }
+
+                if($char === '<') {
+                    $out .= '<' . $varName;
+                    $varName = '';
+                    continue;
+                }
+
+                $varName .= $char;
+            } else
+                $inVarName = $char === '<';
+
+            if(!$inVarName)
+                $out .= $char;
+        }
+
+        if($varName !== '')
+            $out .= $varName;
+
+        return $out;
+    }
+
+    public function scopeTo(string $namePrefix = '', string $pathPrefix = ''): UrlRegistry {
+        return new ScopedUrlRegistry($this, $namePrefix, $pathPrefix);
+    }
+}
diff --git a/src/Urls/ScopedUrlRegistry.php b/src/Urls/ScopedUrlRegistry.php
new file mode 100644
index 0000000..5a903fd
--- /dev/null
+++ b/src/Urls/ScopedUrlRegistry.php
@@ -0,0 +1,52 @@
+<?php
+// ScopedUrlRegistry.php
+// Created: 2024-10-03
+// Updated: 2024-10-03
+
+namespace Index\Urls;
+
+use InvalidArgumentException;
+
+/**
+ * Provides a scoped URL registry implementation.
+ */
+class ScopedUrlRegistry implements UrlRegistry {
+    /**
+     * @param UrlRegistry $registry Base URL registry, preferably not a scoped one to avoid overhead.
+     * @param string $namePrefix String to prefix names in the scope with.
+     * @param string $pathPrefix String to prefix paths in the scope with, must start with / if not empty.
+     * @throws InvalidArgumentException If $pathPrefix is non-empty but doesn't start with a /.
+     */
+    public function __construct(
+        private UrlRegistry $registry,
+        private string $namePrefix,
+        private string $pathPrefix
+    ) {
+        if($pathPrefix !== '' && !str_starts_with($pathPrefix, '/'))
+            throw new InvalidArgumentException('$pathPrefix must start with a / if it is non-empty');
+    }
+
+    public function register(string $name, string $path, array $query = [], string $fragment = ''): void {
+        $this->registry->register(
+            $this->namePrefix . $name,
+            $this->pathPrefix . $path,
+            $query,
+            $fragment
+        );
+    }
+
+    public function format(string $name, array $vars = [], bool $spacesAsPlus = false): string {
+        return $this->registry->format(
+            $this->namePrefix . $name,
+            $vars,
+            $spacesAsPlus
+        );
+    }
+
+    public function scopeTo(string $namePrefix = '', string $pathPrefix = ''): UrlRegistry {
+        return $this->registry->scopeTo(
+            $this->namePrefix . $namePrefix,
+            $this->pathPrefix . $pathPrefix
+        );
+    }
+}
diff --git a/src/Urls/UrlFormat.php b/src/Urls/UrlFormat.php
new file mode 100644
index 0000000..9d0120e
--- /dev/null
+++ b/src/Urls/UrlFormat.php
@@ -0,0 +1,89 @@
+<?php
+// UrlFormat.php
+// Created: 2024-10-03
+// Updated: 2024-10-03
+
+namespace Index\Urls;
+
+use Attribute;
+use ReflectionAttribute;
+use ReflectionObject;
+
+/**
+ * An attribute for denoting URL formatting for a route handler.
+ */
+#[Attribute(Attribute::TARGET_METHOD | Attribute::IS_REPEATABLE)]
+class UrlFormat {
+    /**
+     * @param string $name Name of the URL format.
+     * @param string $path Path component template of the URL.
+     * @param array<string, string> $query Query string component template for the URL.
+     * @param string $fragment Fragment component template for the URL.
+     */
+    public function __construct(
+        private string $name,
+        private string $path,
+        private array $query = [],
+        private string $fragment = ''
+    ) {}
+
+    /**
+     * Returns the name for this URL format.
+     *
+     * @return string
+     */
+    public function getName(): string {
+        return $this->name;
+    }
+
+    /**
+     * Returns the path component template for this URL format.
+     *
+     * @return string
+     */
+    public function getPath(): string {
+        return $this->path;
+    }
+
+    /**
+     * Returns the query component template for this URL format.
+     *
+     * @return array<string, string>
+     */
+    public function getQuery(): array {
+        return $this->query;
+    }
+
+    /**
+     * Returns the fragment component template for this URL format.
+     *
+     * @return string
+     */
+    public function getFragment(): string {
+        return $this->fragment;
+    }
+
+    /**
+     * Reads attributes from methods in a UrlSource instance and registers them to a given UrlRegistry instance.
+     *
+     * @param UrlRegistry $registry
+     * @param UrlSource $source
+     */
+    public static function register(UrlRegistry $registry, UrlSource $source): void {
+        $objectInfo = new ReflectionObject($source);
+        $methodInfos = $objectInfo->getMethods();
+
+        foreach($methodInfos as $methodInfo) {
+            $attrInfos = $methodInfo->getAttributes(UrlFormat::class, ReflectionAttribute::IS_INSTANCEOF);
+            foreach($attrInfos as $attrInfo) {
+                $formatInfo = $attrInfo->newInstance();
+                $registry->register(
+                    $formatInfo->getName(),
+                    $formatInfo->getPath(),
+                    $formatInfo->getQuery(),
+                    $formatInfo->getFragment(),
+                );
+            }
+        }
+    }
+}
diff --git a/src/Urls/UrlRegistry.php b/src/Urls/UrlRegistry.php
new file mode 100644
index 0000000..7fdd2f8
--- /dev/null
+++ b/src/Urls/UrlRegistry.php
@@ -0,0 +1,47 @@
+<?php
+// UrlRegistry.php
+// Created: 2024-10-03
+// Updated: 2024-10-03
+
+namespace Index\Urls;
+
+use InvalidArgumentException;
+
+/**
+ * Provides an interface for defining a URL registry.
+ */
+interface UrlRegistry {
+    /**
+     * Registers a URL format.
+     *
+     * TODO: explain formatting system
+     *
+     * @param string $name Name of the format.
+     * @param string $path Path portion of the URL.
+     * @param array<string, string> $query Query string variables of the URL.
+     * @param string $fragment Fragment portion of the URL.
+     * @throws InvalidArgumentException If $name has already been registered.
+     * @throws InvalidArgumentException If $path if empty or does not start with a /.
+     */
+    function register(string $name, string $path, array $query = [], string $fragment = ''): void;
+
+    /**
+     * Format a URL.
+     *
+     * @param string $name Name of the URL to format.
+     * @param array<string, mixed> $vars Values to replace the variables in the path, query and fragment with.
+     * @param bool $spacesAsPlus Whether to represent spaces as a + instead of %20.
+     * @return string Formatted URL.
+     */
+    function format(string $name, array $vars = [], bool $spacesAsPlus = false): string;
+
+    /**
+     * Creates a scoped URL registry.
+     *
+     * @param string $namePrefix String to prefix names in the scope with.
+     * @param string $pathPrefix String to prefix paths in the scope with, must start with / if not empty.
+     * @throws InvalidArgumentException If $pathPrefix is non-empty but doesn't start with a /.
+     * @return UrlRegistry A scoped URL registry.
+     */
+    function scopeTo(string $namePrefix = '', string $pathPrefix = ''): UrlRegistry;
+}
diff --git a/src/Urls/UrlSource.php b/src/Urls/UrlSource.php
new file mode 100644
index 0000000..fc3b44d
--- /dev/null
+++ b/src/Urls/UrlSource.php
@@ -0,0 +1,10 @@
+<?php
+// UrlSource.php
+// Created: 2024-10-03
+// Updated: 2024-10-03
+
+namespace Index\Urls;
+
+interface UrlSource {
+    function registerUrls(UrlRegistry $registry): void;
+}