feat: initial project structure

cmd/claude-failover/main.go

@@ -0,0 +1,58 @@
+// Package main is the entrypoint for the claude-failover daemon.
+//
+// Scope of this stub: load the YAML config from disk, log startup
+// information, and block until a termination signal. The real runtime
+// (dispatcher, quota-monitor, session-watcher, checkpoint, janitor,
+// notifier, account-switcher goroutines) is not implemented yet — see
+// docs/architecture.md.
+package main
+
+import (
+	"context"
+	"flag"
+	"log"
+	"os"
+	"os/signal"
+	"syscall"
+)
+
+// Config mirrors config.example.yaml at a high level. We keep it loose
+// here because this stub does not wire real YAML parsing yet; the full
+// schema will live in internal/config once implementation starts.
+type Config struct {
+	Path string
+}
+
+func loadConfig(path string) (*Config, error) {
+	// TODO(claude-failover): parse YAML via gopkg.in/yaml.v3 and validate.
+	if _, err := os.Stat(path); err != nil {
+		return nil, err
+	}
+	return &Config{Path: path}, nil
+}
+
+func main() {
+	var cfgPath string
+	flag.StringVar(&cfgPath, "config", "config.yaml", "path to YAML config")
+	flag.Parse()
+
+	log.SetFlags(log.LstdFlags | log.Lmicroseconds | log.LUTC)
+	log.Printf("claude-failover starting (config=%s)", cfgPath)
+
+	cfg, err := loadConfig(cfgPath)
+	if err != nil {
+		log.Fatalf("config load failed: %v", err)
+	}
+	log.Printf("config loaded: %s", cfg.Path)
+
+	// TODO: spawn goroutines — dispatcher, quota-monitor, session-watcher,
+	// checkpoint, janitor, notifier, account-switcher.
+
+	ctx, cancel := signal.NotifyContext(context.Background(),
+		syscall.SIGINT, syscall.SIGTERM)
+	defer cancel()
+
+	log.Printf("claude-failover ready (stub — no workers running)")
+	<-ctx.Done()
+	log.Printf("shutdown signal received, exiting")
+}