fable

nodejs/controller/ai/providers/ollama.js

@@ -138,6 +138,13 @@ class OllamaProvider {
 				content: rawContent
 			});
 
+			// Cap history — unbounded growth eventually overflows num_ctx,
+			// which silently truncates the system prompt (memories, tool docs)
+			const maxHistory = this.config.maxHistory || 30;
+			if (this.messages.length > maxHistory) {
+				this.messages.splice(0, this.messages.length - maxHistory);
+			}
+
 			// The text() closure strips markdown code fences so consumers
 			// (processResponse, getToolCalls) get clean content.
 			const result = {