Release 5.2.9

• Add support for "Think" with Microsoft.Extensions.AI ChatOptions #280

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Thanks @Jimex

Release 5.2.8

Improved the source code generator for Ollama tools:

• supports line breaks in summaries (#251)
• supports tools without namespace (#262)
• won't cause warnings for missing XML documentation of the generator tool class (#263)

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Recap: Providing tools is as simple as implementing a method and decorating it with the OllamaTool attribute.

/// <summary>
/// Get the current weather for a city
/// </summary>
/// <param name="city">Name of the city</param>
[OllamaTool]
public static string GetWeather(string city) => $"It's cold at only 6°C in {city}.";

Make sure to add <GenerateDocumentationFile>true</GenerateDocumentationFile> to your project file to include the XML documentation when building.

See tool support for more information.

Release 5.2.7

Improvements to the Chat class

• Adds support for multiple tool calls
• Adds an event OnThink that gets fired for thinking tokens if Think is set to true
• Adds an event OnToolCall that gets fired once the AI model wants to call a tool
• Adds an event OnToolResult that gets fired once a result is available for a tool call that the AI model requested

Demo Console:

• Prints tool calls as they happen in between messages from the AI model

Release 5.2.6

The Chat class can now yield thoughts over OnThink(string) when thinking is allowed (Think=true) #273.

You can easily experiment with this in the console demos by using the command /togglethink that switches the think mode from null → false → true → null ...

Release 5.2.5

• Skip initializing Think property #271
• Return typed MCP tools from GetFromMcpServers() #260

Release 5.2.4

• Add token usage to last value produced by IChatClient.GetStreamingResponseAsync() #270

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Thanks @jmickeyd

Release 5.2.3

• Update ModelContextProtocol to version 0.2.0-preview.3

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Thanks @RynFaulkner

Release 5.2.2

• Make Chat.Think nullable, used for set null to do not parse <think> #256 - thanks @mili-tan

→ learn more about think in release 5.2.0

Release 5.2.1

• Support think with Chat #255

→ learn more about think in release 5.2.0

Release 5.2.0

• Add support for think and thinking with Ollama 0.9 #254 - thanks @mili-tan

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Important notes

The Think parameter controls whether the models are allowed to reason and how the reasoning tokens are handled.

Reasoning model	Marked "thinking" in Ollama library	Think=false	Think=true
Yes	Yes	Disables reasoning	Enables reasoning + Separates reasoning tokens in Message.Thinking
Yes	No	Reasoning stays enabled + Reasoning tags will appear as <think></think> in the models response	❌ Error: Model does not support thinking → Download the model again
No	No	No effect	❌ Error: Model does not support thinking