Say that the slash no longer names the provider on those five Bots

Author: davidmckayv

CHANGELOG.md

@@ -17,6 +17,13 @@ half as the provider and sent only the rest, so a compatibility endpoint either
 Strands, Agno, LlamaIndex and CrewAI Bots now keep the chosen provider in front, and the whole
 model name reaches the endpoint.
 
+The slash no longer names the provider on those five Bots, so a `BOT_MODEL` that relied on it to
+reach somewhere other than `BOT_PROVIDER` is now read as part of the model name: `bedrock/…`,
+`azure/…` and `openrouter/…` reach the provider `BOT_PROVIDER` names rather than the one written in
+front of the slash. `BOT_PROVIDER` is the setting for that, and a model name written bare beside it
+behaves as it did. The framework Bot `agent-langgraph` and the Langroid Bot are unchanged, because
+neither read the slash that way.
+
 ### A coworker can be a file of its own
 
 The example package declared every coworker in one `agents.yaml`, so adding one meant editing a file