Add customizable prompts for system messages in Options

Introduced `SystemPrompt` and `ExtraSystemPrompts` to allow more flexible and context-aware system message customization. Replaced static default system message with dynamic handling using these new fields, falling back to `DefaultPrompt` if needed. Updated the request construction logic to incorporate the newly added prompt options.

pkg/answer/answer.go

@@ -32,6 +32,8 @@ type Question struct {
 // Answers is a list of answers to a question
 type Answers []string
 
+const DefaultPrompt = "You are being asked to answer a question.  You must respond with a function.  You can answer it if you know the answer, or if some functions exist you can use those to help you find the answer."
+
 type Options struct {
 	// MaxSearches is the maximum possible number of searches to execute for this question.  If this is set to 5, the function could
 	// search up to 5 possible times to find an answer.
@@ -50,6 +52,15 @@ type Options struct {
 	// The "answer" and "no_answer" functions are not included in this callback.
 	// Return an error to stop the function from being called.
 	OnNewFunction func(ctx context.Context, funcName string, question string, parameter string) error
+
+	// SystemPrompt is the prompt to use when asking the system to answer a question.
+	// If this is empty, DefaultPrompt will be used.
+	SystemPrompt string
+
+	// ExtraSystemPrompts is a list of extra prompts to use when asking the system to answer a question.  Use these for
+	// variety in the prompts, or passing in some useful contextually relevant information.
+	// All of these will be used in addition to the SystemPrompt.
+	ExtraSystemPrompts []string
 }
 
 var DefaultOptions = Options{
@@ -339,17 +350,29 @@ func (o Options) Answer(ctx context.Context, q Question) (Answers, error) {
 
 	var temp float32 = 0.8
 
+	var messages []gollm.Message
+
+	if o.SystemPrompt != "" {
+		messages = append(messages, gollm.Message{
+			Role: gollm.RoleSystem,
+			Text: o.SystemPrompt,
+		})
+	} else {
+		messages = append(messages, gollm.Message{
+			Role: gollm.RoleSystem,
+			Text: DefaultPrompt,
+		})
+	}
+
+	for _, prompt := range o.ExtraSystemPrompts {
+		messages = append(messages, gollm.Message{
+			Role: gollm.RoleSystem,
+			Text: prompt,
+		})
+	}
+
 	req := gollm.Request{
-		Messages: []gollm.Message{
+		Messages:    messages,
-			{
-				Role: gollm.RoleSystem,
-				Text: "You are being asked to answer a question.  You must respond with a function.  You can answer it if you know the answer, or if some functions exist you can use those to help you find the answer.",
-			},
-			{
-				Role: gollm.RoleUser,
-				Text: q.Question,
-			},
-		},
 		Toolbox:     gollm.NewToolBox(funcs...),
 		Temperature: &temp,
 	}