feat(deepseek): support native tool calling for deepseek-reasoner V3.2

[wangxiaolong100]

Related GitHub Issue

Closes: #9744

Roo Code Task Context (Optional)

N/A

Description

This PR adds native tool calling support for the deepseek-reasoner model in thinking mode, as per the DeepSeek API documentation.

Key implementation details:

• Override createMessage in DeepSeekHandler: When using deepseek-reasoner with native tool protocol, use convertToOpenAiMessages instead of convertToR1Format to properly handle:

  • tool_calls in assistant messages
  • role: "tool" messages with tool_call_id for tool results

• Create dedicated OpenAI client: Since the parent class's client is private, a separate deepSeekClient is created in DeepSeekHandler for native tool calling requests.

• Delegation pattern: For all other cases (XML protocol or deepseek-chat model), the implementation delegates to the parent class to maintain backward compatibility.

Why this change is needed:

The existing convertToR1Format function only handles text and image message types, but doesn't process tool_use and tool_result blocks required for native tool calling. This causes issues when using deepseek-reasoner with native tools enabled.

Test Procedure

1. Configure Roo Code to use DeepSeek provider with deepseek-reasoner model
2. Set tool protocol to native in the profile settings
3. Start a task that requires tool usage (e.g., file operations, terminal commands)
4. Verify that:
   • The model can make tool calls successfully
   • Tool results are properly returned to the model
   • reasoning_content (thinking chain) is still captured and displayed
   • Multi-turn tool calling works correctly

Pre-Submission Checklist

• Issue Linked: This PR is linked to an approved GitHub Issue (see "Related GitHub Issue" above).
• Scope: My changes are focused on the linked issue (one major feature/fix per PR).
• Self-Review: I have performed a thorough self-review of my code.
• Testing: New and/or updated tests have been added to cover my changes (if applicable).
• Documentation Impact: I have considered if my changes require documentation updates (see "Documentation Updates" section below).
• Contribution Guidelines: I have read and agree to the Contributor Guidelines.

Screenshots / Videos

N/A - This is a backend/API change with no UI impact.

Documentation Updates

• No documentation updates are required.

Additional Notes

• This implementation follows the official DeepSeek API documentation for thinking mode with tool calling
• The change is minimal and focused - only affects deepseek-reasoner + native protocol combination
• Backward compatibility is maintained for all other scenarios

Get in Touch

haha.w

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Important

Adds native tool calling support for deepseek-reasoner in DeepSeekHandler by overriding createMessage and creating a dedicated OpenAI client.

• Behavior:
  • Overrides createMessage in DeepSeekHandler to support deepseek-reasoner with native tool protocol using convertToOpenAiMessages.
  • Handles tool_calls and role: "tool" messages with tool_call_id.
  • Delegates to parent class for non-native protocols or other models.
• Client:
  • Creates deepSeekClient in DeepSeekHandler for native tool calling requests.
• Misc:
  • Uses XmlMatcher to process reasoning content and tool calls.
  • Adjusts processUsageMetrics to handle DeepSeek's usage metrics.

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[roomote]

Rooviewer   See task on Roo Cloud

Review complete. The change adds defaultToolProtocol: "native" to the deepseek-reasoner model configuration, setting a sensible default for native tool calling in thinking mode. The change is type-safe, well-commented, and aligns with the DeepSeek API documentation.

Previous reviews

• 4819e26: Review #1
• 5839260: Review #2

_{Mention @roomote in a comment to request specific changes to this pull request or fix all unresolved issues.}