feat(agent): add core agent loop and autonomous scheduler

internal/agent/scheduler.go

@@ -0,0 +1,69 @@
+package agent
+
+import (
+	"context"
+	"log/slog"
+	"time"
+)
+
+type Scheduler struct {
+	agent     *Agent
+	interval  time.Duration
+	diaryHour int
+	stopCh    chan struct{}
+}
+
+func NewScheduler(agent *Agent, interval time.Duration, diaryHour int) *Scheduler {
+	return &Scheduler{
+		agent:     agent,
+		interval:  interval,
+		diaryHour: diaryHour,
+		stopCh:    make(chan struct{}),
+	}
+}
+
+func (s *Scheduler) Start(ctx context.Context) {
+	slog.Info("scheduler started", "interval", s.interval)
+	ticker := time.NewTicker(s.interval)
+	defer ticker.Stop()
+
+	for {
+		select {
+		case <-ctx.Done():
+			slog.Info("scheduler stopped via context")
+			return
+		case <-s.stopCh:
+			slog.Info("scheduler stopped via signal")
+			return
+		case <-ticker.C:
+			s.tick(ctx)
+		}
+	}
+}
+
+func (s *Scheduler) Stop() {
+	close(s.stopCh)
+}
+
+func (s *Scheduler) tick(ctx context.Context) {
+	mood := s.agent.companion.Mood()
+	lastContact := s.agent.companion.LastContactDuration()
+	trust := s.agent.companion.Trust()
+
+	slog.Debug("scheduler tick", "mood", mood, "lastContact", lastContact, "trust", trust)
+
+	if lastContact > 48*time.Hour && trust > 0.6 {
+		s.agent.companion.QueueAutonomousMessage(
+			"Haven't heard from you in a while. Everything okay?",
+		)
+	}
+
+	if s.agent.cfg.AutoDiary {
+		hour := time.Now().Hour()
+		if hour >= s.diaryHour || hour < 1 {
+			if err := s.agent.companion.WriteDiary(ctx); err != nil {
+				slog.Warn("diary write failed", "error", err)
+			}
+		}
+	}
+}