feat: add FreeRide diagnostic tool and native tool implementation

cmd/freeride-diag/main.go

@@ -0,0 +1,159 @@
+package main
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"os"
+	"sort"
+	"strings"
+	"time"
+)
+
+type Model struct {
+	ID            string `json:"id"`
+	Name          string `json:"name"`
+	ContextLength int    `json:"context_length"`
+	Pricing       struct {
+		Prompt     string `json:"prompt"`
+		Completion string `json:"completion"`
+	} `json:"pricing"`
+	Created    int64 `json:"created"`
+	Score      float64
+	LastError  string
+	IsReachable bool
+}
+
+func main() {
+	apiKey := os.Getenv("OPENROUTER_API_KEY")
+	if apiKey == "" {
+		fmt.Println("❌ Error: OPENROUTER_API_KEY environment variable is not set.")
+		os.Exit(1)
+	}
+
+	fmt.Println("🔍 Fetching all models from OpenRouter...")
+	models, err := fetchModels(apiKey)
+	if err != nil {
+		fmt.Printf("❌ Failed to fetch models: %v\n", err)
+		os.Exit(1)
+	}
+
+	var freeModels []Model
+	for _, m := range models {
+		if m.Pricing.Prompt == "0" && m.Pricing.Completion == "0" {
+			// Scoring logic (same as tool)
+			score := 0.0
+			score += float64(m.ContextLength) / 128000.0 * 0.4
+			if m.Created > 0 {
+				ageInDays := float64(time.Now().Unix()-m.Created) / 86400.0
+				if ageInDays < 365 {
+					score += (1.0 - ageInDays/365.0) * 0.2
+				}
+			}
+			m.Score = score
+			freeModels = append(freeModels, m)
+		}
+	}
+
+	sort.Slice(freeModels, func(i, j int) bool {
+		return freeModels[i].Score > freeModels[j].Score
+	})
+
+	fmt.Printf("✅ Found %d free models. Testing connectivity until we find 3 working ones...\n\n", len(freeModels))
+
+	successCount := 0
+	for i := range freeModels {
+		if successCount >= 3 {
+			break
+		}
+		m := &freeModels[i]
+		fmt.Printf("[%d/%d] Testing %s... ", i+1, len(freeModels), m.ID)
+		
+		err := testModel(apiKey, m.ID)
+		if err == nil {
+			m.IsReachable = true
+			successCount++
+			fmt.Println("✅ OK")
+		} else {
+			m.LastError = err.Error()
+			fmt.Printf("❌ FAIL (%v)\n", err)
+		}
+	}
+
+	fmt.Println("\n--- FINAL RECOMMENDATIONS ---")
+	header := fmt.Sprintf("%-50s | %-15s | %-10s", "Model ID", "Context", "Status")
+	fmt.Println(header)
+	fmt.Println(strings.Repeat("-", len(header)))
+
+	for i, m := range freeModels {
+		if i >= 10 {
+			break
+		}
+		status := "Unknown"
+		if i < 5 {
+			if m.IsReachable {
+				status = "✅ OK"
+			} else {
+				status = "❌ FAIL"
+			}
+		}
+		fmt.Printf("%-50s | %-15d | %-10s\n", m.ID, m.ContextLength, status)
+	}
+
+	for _, m := range freeModels {
+		if m.IsReachable {
+			fmt.Printf("\n🚀 SUCCESS! Use this model for testing: \n   go run cmd/picoclaw/main.go agent --model openrouter/%s\n", m.ID)
+			break
+		}
+	}
+}
+
+func fetchModels(apiKey string) ([]Model, error) {
+	req, _ := http.NewRequest("GET", "https://openrouter.ai/api/v1/models", nil)
+	req.Header.Set("Authorization", "Bearer "+apiKey)
+	
+	resp, err := http.DefaultClient.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	var result struct {
+		Data []Model `json:"data"`
+	}
+	if err := json.NewDecoder(resp.Body).Decode(&result); err != nil {
+		return nil, err
+	}
+	return result.Data, nil
+}
+
+func testModel(apiKey, modelID string) error {
+	payload := map[string]any{
+		"model": modelID,
+		"messages": []map[string]string{
+			{"role": "user", "content": "ping"},
+		},
+		"max_tokens": 10,
+	}
+	body, _ := json.Marshal(payload)
+	
+	req, _ := http.NewRequest("POST", "https://openrouter.ai/api/v1/chat/completions", bytes.NewReader(body))
+	req.Header.Set("Authorization", "Bearer "+apiKey)
+	req.Header.Set("Content-Type", "application/json")
+	
+	client := &http.Client{Timeout: 10 * time.Second}
+	resp, err := client.Do(req)
+	if err != nil {
+		return err
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		respBody, _ := io.ReadAll(resp.Body)
+		return fmt.Errorf("HTTP %d: %s", resp.StatusCode, string(respBody))
+	}
+	
+	return nil
+}