Keep OpenRouter responses clean for non-reasoning models

Swap models without rewriting tool definitions with cross-model tool call compatibility

Tool call schemas are now normalized across model providers, so switching an agent from one model to another no longer requires adjusting how tools are defined or how their outputs are parsed.

Tailor document segmentation with custom prompt support on AgenticChunking

AgenticChunking now accepts a custom_prompt parameter, letting you override the default model-driven chunking instructions with domain-specific logic.

Update Seltz toolkit to SDK v0.2.0

The Seltz toolkit has been updated to align with the breaking changes introduced in the Seltz SDK 0.2.0 release, replacing the previous 0.1.x integration.