agent-diva-extend-integrations

Guide for extending Agent Diva with new LLM providers, chat channels, or tools. Use when adding or modifying integrations in agent-diva-providers (LLMProvider, providers.yaml, ProviderRegistry), agent-diva-channels (ChannelHandler, ChannelManager, lib.rs exports), agent-diva-tools (Tool trait), or agent-diva-agent (where ToolRegistry is populated). Covers model-ID safety for native vs LiteLLM gateways and where to add tests.