initial agent-mgr: app builder platform MVP

Go API server + Preact UI + Claude Code adapter.
- App-centric model (ideas, not repos)
- AgentProvider interface for multi-agent support
- K8s pod lifecycle for sandboxed agent sessions
- Gitea integration (create repos, push branches)
- WebSocket streaming for live session output
- Woodpecker CI/CD pipelines (kaniko build + kubectl deploy)

internal/events/valkey.go

@@ -0,0 +1,71 @@
+package events
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+
+	"github.com/redis/go-redis/v9"
+)
+
+const channel = "agent-mgr:events"
+
+type Bus struct {
+	rdb *redis.Client
+}
+
+type Event struct {
+	Type      string `json:"type"` // "session.started", "session.completed", "session.failed", "session.stopped", "app.status"
+	SessionID string `json:"session_id,omitempty"`
+	AppID     string `json:"app_id,omitempty"`
+	Status    string `json:"status,omitempty"`
+	Message   string `json:"message,omitempty"`
+}
+
+func NewBus(addr, password string) *Bus {
+	return &Bus{
+		rdb: redis.NewClient(&redis.Options{
+			Addr:     addr,
+			Password: password,
+		}),
+	}
+}
+
+func (b *Bus) Publish(ctx context.Context, evt Event) error {
+	data, err := json.Marshal(evt)
+	if err != nil {
+		return fmt.Errorf("marshal event: %w", err)
+	}
+	return b.rdb.Publish(ctx, channel, data).Err()
+}
+
+func (b *Bus) Subscribe(ctx context.Context) (<-chan Event, error) {
+	sub := b.rdb.Subscribe(ctx, channel)
+	ch := make(chan Event, 64)
+
+	go func() {
+		defer close(ch)
+		defer sub.Close()
+		for {
+			msg, err := sub.ReceiveMessage(ctx)
+			if err != nil {
+				return
+			}
+			var evt Event
+			if err := json.Unmarshal([]byte(msg.Payload), &evt); err != nil {
+				continue
+			}
+			select {
+			case ch <- evt:
+			case <-ctx.Done():
+				return
+			}
+		}
+	}()
+
+	return ch, nil
+}
+
+func (b *Bus) Close() error {
+	return b.rdb.Close()
+}