chore: rebuild CentOS7 release package

lib/agent-runtime.js

@@ -23,6 +23,32 @@ function createAgentRuntime(deps) {
     getRuntimeSessionId,
   } = deps;
 
+  function readRuntimePositiveIntEnv(name, fallback, options = {}) {
+    const raw = Number.parseInt(String(processEnv?.[name] || ''), 10);
+    const min = Number.isFinite(options.min) ? options.min : 1;
+    const max = Number.isFinite(options.max) ? options.max : Number.MAX_SAFE_INTEGER;
+    if (!Number.isFinite(raw) || raw <= 0) return fallback;
+    return Math.max(min, Math.min(max, raw));
+  }
+
+  const RUNTIME_FULL_TEXT_MAX_CHARS = readRuntimePositiveIntEnv(
+    'CC_WEB_RUNTIME_FULL_TEXT_MAX_CHARS',
+    256 * 1024,
+    { min: 4096 },
+  );
+  const RUNTIME_TRUNCATED_HEAD = '[cc-web: 前文过长，已保留尾部以保护服务稳定性]\n';
+
+  function keepTail(value, maxLen) {
+    const text = String(value || '');
+    if (!Number.isFinite(maxLen) || maxLen <= 0 || text.length <= maxLen) return text;
+    const keep = Math.max(0, maxLen - RUNTIME_TRUNCATED_HEAD.length);
+    return `${RUNTIME_TRUNCATED_HEAD}${text.slice(-keep)}`;
+  }
+
+  function appendCappedText(current, addition, maxLen = RUNTIME_FULL_TEXT_MAX_CHARS) {
+    return keepTail(`${String(current || '')}${String(addition || '')}`, maxLen);
+  }
+
   function tomlString(value) {
     return JSON.stringify(String(value || ''));
   }
@@ -330,7 +356,7 @@ function createAgentRuntime(deps) {
       ? (/\n\s*$/.test(currentText) ? `\n${createAgentMessageDivider()}\n\n` : `\n\n${createAgentMessageDivider()}\n\n`)
       : '';
     const chunk = separator + nextText;
-    entry.fullText += chunk;
+    entry.fullText = appendCappedText(entry.fullText || '', chunk);
     return chunk;
   }
 
@@ -383,7 +409,7 @@ function createAgentRuntime(deps) {
 
         for (const block of content) {
           if (block.type === 'text' && block.text) {
-            entry.fullText += block.text;
+            entry.fullText = appendCappedText(entry.fullText || '', block.text);
             sendRuntime(entry, sessionId, { type: 'text_delta', text: block.text });
           } else if (block.type === 'tool_use') {
             const toolInput = sanitizeToolInput(block.name, block.input);