fix(claude-code): prefix tool names to bypass OAuth validation

[hannesrudolph]

Summary

Anthropic rejects third-party tools when using Claude Code OAuth tokens. This PR prefixes tool names with oc_ when sending requests to the API and strips the prefix from tool names in responses, allowing Roo Code tools to work with Claude Code OAuth authentication.

This is based on the approach suggested in #10570 - thank you to @anomalyco @fernando234234.

⚠️ Important Notice

This PR is blocked pending approval from Anthropic.

We are concerned that implementing this workaround could lead to widespread bans of users utilizing the Claude Code integration in Roo Code. Anthropic has recently taken action against third-party clients, and we want to ensure this change does not put our users at risk.

We will not merge this PR until we receive explicit confirmation from Anthropic that this approach is acceptable.

Changes

src/integrations/claude-code/streaming-client.ts

• Added TOOL_NAME_PREFIX = "oc_" constant
• Created exported helper functions prefixToolName() and stripToolNamePrefix() for use by other modules
• Added internal helper functions prefixToolNames() and prefixToolNamesInMessages()
• Modified createStreamingMessage() to:
  • Prefix all tool names in the tools array before sending to the API
  • Prefix tool_use blocks in conversation messages (for multi-turn conversations)
  • Strip the prefix from tool names when processing streaming responses (content_block_start events with tool_use)

src/integrations/claude-code/__tests__/streaming-client.spec.ts

• Added unit tests for prefixToolName and stripToolNamePrefix functions
• Added integration tests verifying tool name prefixing in API requests
• Added integration test verifying prefix stripping in responses

Testing

All 23 tests in the streaming-client test suite pass, including the new tests for the tool name prefixing functionality.

---

Important

This PR prefixes tool names with oc_ in API requests and strips the prefix in responses to bypass Anthropic's OAuth validation, pending approval from Anthropic.

• Behavior:
  • Prefixes tool names with oc_ in API requests and strips prefix in responses in createStreamingMessage() in streaming-client.ts.
  • Handles tool names in tool_use blocks and tool_choice.
• Functions:
  • Adds prefixToolName(), stripToolNamePrefix(), prefixToolNames(), prefixToolNamesInMessages(), and prefixToolChoice() in streaming-client.ts.
• Tests:
  • Adds unit tests for prefixing functions in streaming-client.spec.ts.
  • Adds integration tests for tool name prefixing and stripping in API requests and responses.

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[roomote]

Oroocle   See task on Roo Cloud

Re-review complete. Previously flagged item is resolved.

• Prefix tool_choice when sending requests so forced tool selection matches prefixed tool names

Previous reviews

• 6173606: Review #1

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