diff --git a/src/Bc.php b/src/Bc.php
index 9e4ca33..df9d77e 100644
--- a/src/Bc.php
+++ b/src/Bc.php
@@ -1,389 +1 @@
-<?php
-
-declare(strict_types=1);
-
-namespace Tez\Utils\Num;
-
-use Tez\Utils\Validate\Guard;
-
-/**
- * Arbitrary-precision decimal arithmetic helpers wrapping PHP's bcmath extension.
- *
- * All methods default to 8 decimal places, which is appropriate for financial
- * calculations. Every input must be a numeric string (e.g. "1.50000000").
- * Passing a non-numeric string to any method throws \InvalidArgumentException.
- */
-final class Bc
-{
-    /**
-     * Add two arbitrary-precision decimals.
-     *
-     * @param numeric-string $a
-     * @param numeric-string $b
-     * @throws \Throwable
-     * @return numeric-string
-     */
-    public static function add(string $a, string $b, int $scale = 8): string
-    {
-        return bcadd(
-            Guard::isNumeric($a),
-            Guard::isNumeric($b),
-            $scale,
-        );
-    }
-
-    /**
-     * Sum an array of arbitrary-precision decimals.
-     *
-     * Returns a correctly scaled zero ('0.00000000') for an empty array.
-     *
-     * @param numeric-string[] $operands
-     * @throws \Throwable
-     * @return numeric-string
-     */
-    public static function sum(array $operands, int $scale = 8): string
-    {
-        if ($operands === []) {
-            return self::add('0', '0', $scale);
-        }
-
-        return array_reduce(
-            $operands,
-            static fn(string $carry, string $item) => self::add($carry, (string) $item, $scale),
-            '0',
-        );
-    }
-
-    /**
-     * Subtract $b from $a.
-     *
-     * @param numeric-string $a
-     * @param numeric-string $b
-     * @throws \Throwable
-     * @return numeric-string
-     */
-    public static function sub(string $a, string $b, int $scale = 8): string
-    {
-        return bcsub(
-            Guard::isNumeric($a),
-            Guard::isNumeric($b),
-            $scale,
-        );
-    }
-
-    /**
-     * Multiply two arbitrary-precision decimals.
-     *
-     * @param numeric-string $a
-     * @param numeric-string $b
-     * @throws \Throwable
-     * @return numeric-string
-     */
-    public static function mul(string $a, string $b, int $scale = 8): string
-    {
-        return bcmul(
-            Guard::isNumeric($a),
-            Guard::isNumeric($b),
-            $scale,
-        );
-    }
-
-    /**
-     * Divide $a by $b.
-     *
-     * @param numeric-string $a
-     * @param numeric-string $b
-     * @throws \Throwable
-     * @throws \DivisionByZeroError if $b is zero
-     * @return numeric-string
-     */
-    public static function div(string $a, string $b, int $scale = 8): string
-    {
-        Guard::that(
-            !self::isZero($b, $scale + 1),
-            static fn() => new \DivisionByZeroError('Division by zero.'),
-        );
-
-        return bcdiv(Guard::isNumeric($a), $b, $scale);
-    }
-
-    /**
-     * Normalize a numeric string to exactly $scale decimal places (truncates, does not round).
-     *
-     * Example: Bc::scale('1.5', 8) → '1.50000000'
-     *
-     * @param numeric-string $value
-     * @throws \Throwable
-     * @return numeric-string
-     */
-    public static function scale(string $value, int $scale = 8): string
-    {
-        return self::add(
-            $value,
-            '0',
-            $scale,
-        );
-    }
-
-    /**
-     * Return the absolute value.
-     *
-     * @param numeric-string $value
-     * @throws \Throwable
-     * @return numeric-string
-     */
-    public static function abs(string $value, int $scale = 8): string
-    {
-        return self::isNegative($value, $scale)
-            ? self::sub('0', $value, $scale)
-            : self::add($value, '0', $scale);
-    }
-
-    /**
-     * Return the larger of two values.
-     *
-     * @param numeric-string $a
-     * @param numeric-string $b
-     * @throws \Throwable
-     * @return numeric-string
-     */
-    public static function max(string $a, string $b, int $scale = 8): string
-    {
-        return self::gte($a, $b, $scale)
-            ? self::add($a, '0', $scale)
-            : self::add($b, '0', $scale);
-    }
-
-    /**
-     * Return the smaller of two values.
-     *
-     * @param numeric-string $a
-     * @param numeric-string $b
-     * @throws \Throwable
-     * @return numeric-string
-     */
-    public static function min(string $a, string $b, int $scale = 8): string
-    {
-        return self::lte($a, $b, $scale)
-            ? self::add($a, '0', $scale)
-            : self::add($b, '0', $scale);
-    }
-
-    /**
-     * Compare two values. Returns -1, 0, or 1.
-     *
-     * @param numeric-string $a
-     * @param numeric-string $b
-     * @throws \Throwable
-     */
-    public static function compare(string $a, string $b, int $scale = 8): int
-    {
-        return bccomp(
-            Guard::isNumeric($a),
-            Guard::isNumeric($b),
-            $scale,
-        );
-    }
-
-    /**
-     * Return true when the value is exactly zero at the given scale.
-     *
-     * @param numeric-string $value
-     * @throws \Throwable
-     */
-    public static function isZero(string $value, int $scale = 8): bool
-    {
-        return 0 === self::compare($value, '0', $scale);
-    }
-
-    /**
-     * Return true when $a is greater than $b.
-     *
-     * @param numeric-string $a
-     * @param numeric-string $b
-     * @throws \Throwable
-     */
-    public static function gt(string $a, string $b, int $scale = 8): bool
-    {
-        return 1 === self::compare($a, $b, $scale);
-    }
-
-    /**
-     * Return true when $a is less than $b.
-     *
-     * @param numeric-string $a
-     * @param numeric-string $b
-     * @throws \Throwable
-     */
-    public static function lt(string $a, string $b, int $scale = 8): bool
-    {
-        return -1 === self::compare($a, $b, $scale);
-    }
-
-    /**
-     * Return true when $a is greater than or equal to $b.
-     *
-     * @param numeric-string $a
-     * @param numeric-string $b
-     * @throws \Throwable
-     */
-    public static function gte(string $a, string $b, int $scale = 8): bool
-    {
-        return self::compare($a, $b, $scale) >= 0;
-    }
-
-    /**
-     * Return true when $a is less than or equal to $b.
-     *
-     * @param numeric-string $a
-     * @param numeric-string $b
-     * @throws \Throwable
-     */
-    public static function lte(string $a, string $b, int $scale = 8): bool
-    {
-        return self::compare($a, $b, $scale) <= 0;
-    }
-
-    /**
-     * Return true when $a equals $b at the given scale.
-     *
-     * @param numeric-string $a
-     * @param numeric-string $b
-     * @throws \Throwable
-     */
-    public static function eq(string $a, string $b, int $scale = 8): bool
-    {
-        return 0 === self::compare($a, $b, $scale);
-    }
-
-    /**
-     * Return true when $value is strictly greater than zero.
-     *
-     * @param numeric-string $value
-     * @throws \Throwable
-     */
-    public static function isPositive(string $value, int $scale = 8): bool
-    {
-        return 1 === self::compare($value, '0', $scale);
-    }
-
-    /**
-     * Return true when $value is strictly less than zero.
-     *
-     * @param numeric-string $value
-     * @throws \Throwable
-     */
-    public static function isNegative(string $value, int $scale = 8): bool
-    {
-        return -1 === self::compare($value, '0', $scale);
-    }
-
-    /**
-     * Negate a value (equivalent to multiplying by -1).
-     *
-     * @param numeric-string $value
-     * @throws \Throwable
-     * @return numeric-string
-     */
-    public static function negate(string $value, int $scale = 8): string
-    {
-        return self::sub(
-            '0',
-            $value,
-            $scale,
-        );
-    }
-
-    /**
-     * Calculate $percent % of $value (i.e. value × percent ÷ 100).
-     *
-     * Example: Bc::percent('200', '15') → '30.00000000'
-     *
-     * @param numeric-string $value
-     * @param numeric-string $percent
-     * @throws \Throwable
-     * @return numeric-string
-     */
-    public static function percent(string $value, string $percent, int $scale = 8): string
-    {
-        return self::div(
-            self::mul(
-                $value,
-                $percent,
-                $scale + 2,
-            ),
-            '100',
-            $scale,
-        );
-    }
-
-    /**
-     * Multiply an array of arbitrary-precision decimals together.
-     *
-     * Returns '1.00000000' for an empty array (neutral element of multiplication).
-     *
-     * @param numeric-string[] $operands
-     * @throws \Throwable
-     * @return numeric-string
-     */
-    public static function product(array $operands, int $scale = 8): string
-    {
-        if ($operands === []) {
-            return self::add('1', '0', $scale);
-        }
-
-        return array_reduce(
-            $operands,
-            static fn(string $carry, string $item) => self::mul($carry, (string) $item, $scale),
-            '1',
-        );
-    }
-
-    /**
-     * Subtract all subsequent operands from the first.
-     *
-     * Returns '0.00000000' for an empty array.
-     *
-     * @param numeric-string[] $operands
-     * @throws \Throwable
-     * @return numeric-string
-     */
-    public static function subAll(array $operands, int $scale = 8): string
-    {
-        if ($operands === []) {
-            return self::add('0', '0', $scale);
-        }
-
-        $first = (string) array_shift($operands);
-
-        return array_reduce(
-            $operands,
-            static fn(string $carry, string $item) => self::sub($carry, (string) $item, $scale),
-            $first,
-        );
-    }
-
-    /**
-     * Divide the first operand by each subsequent operand in turn.
-     *
-     * Returns '1.00000000' for an empty array (neutral element of division).
-     *
-     * @param numeric-string[] $operands
-     * @throws \Throwable
-     * @return numeric-string
-     */
-    public static function divAll(array $operands, int $scale = 8): string
-    {
-        if ($operands === []) {
-            return self::add('1', '0', $scale);
-        }
-
-        $first = (string) array_shift($operands);
-
-        return array_reduce(
-            $operands,
-            static fn(string $carry, string $item) => self::div($carry, (string) $item, $scale),
-            $first,
-        );
-    }
-}
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