From 7d82eff753cbdf61e0fd15c30e9a7fd4a8cde99b Mon Sep 17 00:00:00 2001
From: admin <admin@rommark.dev>
Date: Tue, 5 May 2026 20:12:15 +0000
Subject: [PATCH] =?UTF-8?q?fix:=20handle=20truncated=20tool=20call=20JSON?=
 =?UTF-8?q?=20=E2=80=94=20guide=20model=20to=20use=20bash=20heredoc=20for?=
 =?UTF-8?q?=20large=20files?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

When file_write gets a 15KB+ HTML payload, the streaming JSON gets
truncated. Now catches JSON parse errors and returns a specific
hint to use bash heredoc instead of silently failing.
---
 src/bot/index.js | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/src/bot/index.js b/src/bot/index.js
index a9e2b3c4..6085cfbc 100644
--- a/src/bot/index.js
+++ b/src/bot/index.js
@@ -426,7 +426,20 @@ export async function initBot(config, api, tools, skills, agents) {
           if (!handler) {
             result = `❌ Unknown tool: ${fn.name}`;
           } else {
-            const args = JSON.parse(fn.arguments || '{}');
+            let args;
+            try {
+              args = JSON.parse(fn.arguments || '{}');
+            } catch (parseErr) {
+              // Tool call JSON was truncated (common with large file content in file_write)
+              const argLen = (fn.arguments || '').length;
+              result = `❌ ${fn.name} failed: Tool call arguments JSON was truncated (${argLen} chars). ` +
+                (fn.name === 'file_write'
+                  ? 'The file content is too large for a single tool call. Use bash with heredoc instead: bash({ command: "cat > /path/to/file << \'EOF\'\\ncontent here\\nEOF" })'
+                  : 'Retry with shorter arguments or split into smaller calls.');
+              logger.error(`  → ${fn.name} failed: ${parseErr.message} (args length: ${argLen})`);
+              loopMessages.push({ role: 'tool', tool_call_id: tc.id, content: result });
+              continue;
+            }
             logger.info(`  → ${fn.name}(${fn.arguments?.slice(0, 100)})`);
             result = String(await handler(args)).slice(0, 8000);
           }