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Sweep 22 Oct 2026 · 21:04Z Build v2.1.309 528 read Stable v2.1.308 Latest v2.1.309 Next v2.1.309 Feeds RSS JSON llms.txt llms-full.txt Unofficial
HomeDocsClaude Developer Platform 23 Oct 2026
One change · api

parallel-tool-use changedagents-and-tools/tool-use/parallel-tool-use

Nearest release: v2.1.309, published 3 hours before this site recorded the change. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.

Recorded here
Lines+10added
Lines−6removed
From line 365 where the diff opens
First seen 14 Aug 2026 this site's first read of the page
Recorded edits11to this page, all time

The whole hunk

from line 365, old and new numbered
/
lines
from line 365
365365 };
366366 
367367 var finalResponse = await client.Messages.Create(finalParameters);
368 var text = finalResponse.Content.Select(b => b.Value).OfType<TextBlock>().FirstOrDefault();
368 var text = finalResponse.Content.Select(block => block.Value).OfType<TextBlock>().FirstOrDefault();
369369 Console.WriteLine($"\nClaude's response:\n{text?.Text}");
370370 
371371 Console.WriteLine("\n--- Verification ---");
from line 697
697697 echo "\nClaude's response:\n{$textBlock->text}\n";
698698 
699699 echo "\n--- Verification ---\n";
700 echo "✓ Tool results sent in single user message: " . count($toolResults) . " results\n";
700 echo '✓ Tool results sent in single user message: ' . count($toolResults) . " results\n";
701701 echo "✓ No text before tool results in content array\n";
702702 echo "✓ Conversation formatted correctly for future parallel tool use\n";
703703 ```
from line 1056
10561056 .inputSchema(schema)
10571057 .build()
10581058 )
1059 .toolChoice(ToolChoiceAuto.builder().disableParallelToolUse(true).build())
1059 .toolChoice(ToolChoiceAuto.builder()
1060 .disableParallelToolUse(true)
1061 .build())
10601062 .addUserMessage("What is the weather in San Francisco and New York?")
10611063 .build();
10621064 
from line 1074
10721074 messages: [
10731075 ['role' => 'user', 'content' => 'What is the weather in San Francisco and New York?']
10741076 ],
1075 model: 'claude-opus-5-5',
1077 model: Model::CLAUDE_OPUS_5_5,
10761078 toolChoice: ['type' => 'auto', 'disableParallelToolUse' => true],
10771079 tools: [
10781080 [
from line 1339
13371339 .inputSchema(schema)
13381340 .build()
13391341 )
1340 .toolChoice(ToolChoiceAny.builder().disableParallelToolUse(true).build())
1342 .toolChoice(ToolChoiceAny.builder()
1343 .disableParallelToolUse(true)
1344 .build())
13411345 .addUserMessage("What is the weather in San Francisco and New York?")
13421346 .build();
13431347 
from line 1357
13531357 messages: [
13541358 ['role' => 'user', 'content' => 'What is the weather in San Francisco and New York?']
13551359 ],
1356 model: 'claude-opus-5',
1360 model: Model::CLAUDE_OPUS_5,
13571361 toolChoice: ['type' => 'any', 'disableParallelToolUse' => true],
13581362 tools: [
13591363 [
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