Better handoffs

pkg/tui/components/tool/factory.go

@@ -4,6 +4,7 @@ import (
 	"github.com/docker/cagent/pkg/tools/builtin"
 	"github.com/docker/cagent/pkg/tui/components/tool/defaulttool"
 	"github.com/docker/cagent/pkg/tui/components/tool/editfile"
+	"github.com/docker/cagent/pkg/tui/components/tool/handoff"
 	"github.com/docker/cagent/pkg/tui/components/tool/readfile"
 	"github.com/docker/cagent/pkg/tui/components/tool/shell"
 	"github.com/docker/cagent/pkg/tui/components/tool/todotool"
@@ -46,6 +47,7 @@ func newDefaultRegistry() *Registry {
 	registry := NewRegistry()
 
 	registry.Register(builtin.ToolNameTransferTask, transfertask.New)
+	registry.Register(builtin.ToolNameHandoff, handoff.New)
 	registry.Register(builtin.ToolNameEditFile, editfile.New)
 	registry.Register(builtin.ToolNameWriteFile, writefile.New)
 	registry.Register(builtin.ToolNameReadFile, readfile.New)

pkg/tui/components/tool/handoff/handoff.go

@@ -0,0 +1,48 @@
+package handoff
+
+import (
+	"encoding/json"
+
+	tea "charm.land/bubbletea/v2"
+
+	"github.com/docker/cagent/pkg/tools/builtin"
+	"github.com/docker/cagent/pkg/tui/core/layout"
+	"github.com/docker/cagent/pkg/tui/service"
+	"github.com/docker/cagent/pkg/tui/styles"
+	"github.com/docker/cagent/pkg/tui/types"
+)
+
+// Component is a specialized component for rendering handoff tool calls.
+type Component struct {
+	message *types.Message
+}
+
+func New(
+	msg *types.Message,
+	_ *service.SessionState,
+) layout.Model {
+	return &Component{
+		message: msg,
+	}
+}
+
+func (c *Component) SetSize(int, int) tea.Cmd {
+	return nil
+}
+
+func (c *Component) Init() tea.Cmd {
+	return nil
+}
+
+func (c *Component) Update(tea.Msg) (layout.Model, tea.Cmd) {
+	return c, nil
+}
+
+func (c *Component) View() string {
+	var params builtin.HandoffArgs
+	if err := json.Unmarshal([]byte(c.message.ToolCall.Function.Arguments), &params); err != nil {
+		return "" // TODO: Partial tool call
+	}
+
+	return styles.AgentBadgeStyle.Render("["+c.message.Sender+"]") + styles.MutedStyle.Render("hands off to") + styles.AgentBadgeStyle.Render("["+params.Agent+"]")
+}

pkg/tui/components/tool/transfertask/transfertask.go

@@ -44,7 +44,7 @@ func (c *Component) View() string {
 		return "" // TODO: Partial tool call
 	}
 
-	badge := styles.TransferBadgeStyle.Render(c.message.Sender + " -> " + params.Agent + ": ")
+	badge := styles.AgentBadgeStyle.Render("["+c.message.Sender+"]") + styles.MutedStyle.Render("transfers task to") + styles.AgentBadgeStyle.Render("["+params.Agent+"]"+":")
 	content := styles.MutedStyle.Render(params.Task)
-	return badge + "\n" + content
+	return badge + "\n\n" + content
 }

pkg/tui/components/toolcommon/common.go

@@ -38,7 +38,7 @@ func FormatToolResult(content string, width int) string {
 	}
 
 	padding := styles.ToolCallResult.Padding().GetHorizontalPadding()
-	availableWidth := max(width-2-padding, 10) // Minimum readable width
+	availableWidth := max(width-5-padding, 10) // Minimum readable width
 
 	lines := wrapLines(formattedContent, availableWidth)
 
@@ -51,7 +51,7 @@ func FormatToolResult(content string, width int) string {
 
 	trimmedContent := strings.Join(lines, "\n")
 	if trimmedContent != "" {
-		return "\n" + styles.ToolCallResult.Render(styles.ToolCallResultKey.Render("\n-> "+header+":")+"\n"+trimmedContent)
+		return styles.ToolCallResult.Render(styles.ToolCallResultKey.Render("\n-> "+header+":") + "\n" + trimmedContent)
 	}
 
 	return ""