Share image input across agent vendors

internal/antigravity/session.go

@@ -20,6 +20,7 @@ import (
 	"syscall"
 	"time"
 
+	"g.fc.run/ai/byre/internal/agentinput"
 	"g.fc.run/ai/byre/internal/mcp"
 	"g.fc.run/ai/byre/internal/procgroup"
 )
@@ -43,11 +44,6 @@ type Options struct {
 	OnBadLine  func(line []byte, reason string)
 }
 
-type Image struct {
-	MediaType string
-	Data      []byte
-}
-
 type Event struct {
 	Kind string
 	Raw  json.RawMessage
@@ -460,7 +456,7 @@ type block struct {
 	Text string `json:"text"`
 }
 
-func (s *Session) Send(text string, images ...Image) error {
+func (s *Session) Send(text string, images ...agentinput.Image) error {
 	s.mu.Lock()
 	defer s.mu.Unlock()