OneBot: Leantime 改造版源码（BOM/Univer 表格/AI 接管/品牌替换等）

app/Core/Support/LLMStringSanitizer.php

@@ -0,0 +1,38 @@
+<?php
+
+namespace Leantime\Core\Support;
+
+use Illuminate\Support\Str;
+
+/**
+ * Sanitizes strings for safe LLM/AI consumption, prevents prompt injection attacks.
+ *
+ * Delegates to the Str::sanitizeForLLM() macro for the actual sanitization logic.
+ * This class provides a static API for use in entity formatters and other contexts
+ * where the Str macro call pattern is less convenient.
+ */
+class LLMStringSanitizer
+{
+    /**
+     * Sanitize a string for safe use with LLM APIs.
+     *
+     * Removes potential prompt injection patterns and problematic characters
+     * that could interfere with JSON serialization or system prompts.
+     *
+     * @param  mixed  $input  The value to sanitize
+     * @param  bool  $removeNewlines  Whether to strip newlines from the result
+     * @return string The sanitized string
+     */
+    public static function sanitizeForLLM(mixed $input, bool $removeNewlines = false): string
+    {
+        if ($input === null) {
+            return '';
+        }
+
+        if (! is_string($input)) {
+            return (string) $input;
+        }
+
+        return Str::sanitizeForLLM($input, $removeNewlines);
+    }
+}