Rig v0.28.0 is now available!

[joshua-mo-143]

I'm glad to say that Rig v0.28.0 is now available to use!

Additions

• You can now use the tool call name in StreamingPromptHook::on_tool_call_delta!
• StreamingError and StreamingResult from the agent's streaming prompt module are now in the public API!
• You can now manually set the headers in rig::client::Client!

Bug fixes

• Fixed an issue where rig-sqlite was incorrectly using euclidian distance when it was intended to use cosine similarity score
• Fixed an issue with some OpenAI Chat Completion compliant providers sending usage chunks that don't have any completions in them
• Fixed an issue where Deepseek returned status code 415 due to incorrect headers
• Fixed an issue with OpenRouter not having a default serde attribute for reasoning details
• Fixed an issue where Anthropic integration would return an error if using an unknown model

Misc

• Added default JSON header to streaming clients
• rmcp now updated to use v0.12
• Fixed some typos
• Amended CONTRIBUTING.md to add a list of things that will definitely not be accepted

Breaking

• RawStreamingChoice::ToolCallDelta and StreamedAssistantContent::ToolCallDelta now both take a ToolCallDeltaContent which can either be a tool name or a delta. Providers that provide both may have their content chunked into separate parts, respectively.
• Rig's rmcp dependency is now at v0.12. You may need to update your code if you are using MCP.

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Thank you for reading! We build rig, rig builds us.

Full changelog: #1171