54 lines
1.5 KiB
Go
54 lines
1.5 KiB
Go
package router
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import (
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"context"
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"fmt"
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"strconv"
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"strings"
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"gophergate/internal/db"
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)
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const classifierSystemPrompt = `You are a task complexity classifier. Rate the following user message on a scale of 1 to %d, where:
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1 = trivial/simple (basic facts, greetings, simple math)
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%d = highly complex (multi-step reasoning, code generation, architecture design)
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Reply with ONLY the number. No explanation.`
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func routeClassifier(ctx context.Context, classify ClassifierFunc, group db.ModelGroup, targets []string, userMessage string) (*Decision, error) {
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maxRating := len(targets)
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if maxRating < 2 {
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maxRating = 2
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}
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prompt := fmt.Sprintf(classifierSystemPrompt, maxRating, maxRating)
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ratingStr, err := classify(ctx, getSelectorModel(group, targets), prompt, userMessage)
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if err != nil {
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// Classifier failed — fall back to heuristic
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return routeHeuristic(group, targets, userMessage)
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}
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rating, err := strconv.Atoi(strings.TrimSpace(ratingStr))
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if err != nil || rating < 1 {
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rating = 1
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}
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if rating > maxRating {
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rating = maxRating
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}
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idx := rating - 1 // 0-based index into targets
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return &Decision{
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SelectedModel: targets[idx],
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Strategy: "classifier",
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Reason: fmt.Sprintf("complexity rating: %d/%d", rating, maxRating),
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}, nil
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}
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func getSelectorModel(group db.ModelGroup, targets []string) string {
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if group.SelectorModel != nil && *group.SelectorModel != "" {
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return *group.SelectorModel
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}
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// Default: use the first (cheapest) target model as the selector
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return targets[0]
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}
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