From 84ad7451a7d2e120c07bc7451b0384dc15b301dc Mon Sep 17 00:00:00 2001
From: Levi Neely <141506390+lneely@users.noreply.github.com>
Date: Wed, 1 Apr 2026 13:28:12 +0200
Subject: [PATCH] agent: add Usage field to OutputMsg

OutputMsg.Usage carries the raw backend.Usage value when Role=="usage",
rather than formatting it into Content. main.go can now read em.Usage
directly instead of parsing the formatted string.
---
 agent/loop.go | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/agent/loop.go b/agent/loop.go
index 6cd86f5..c6d3413 100644
--- a/agent/loop.go
+++ b/agent/loop.go
@@ -16,6 +16,7 @@ type OutputMsg struct {
 	Role    string
 	Name    string
 	Content string
+	Usage   backend.Usage
 }
 
 type Config struct {
@@ -116,8 +117,8 @@ func (l *Loop) Run(ctx context.Context, state State) error {
 		// intermediate steps and avoids [↑0 ↓0 tokens] noise).
 		if resp.Usage.InputTokens > 0 || resp.Usage.OutputTokens > 0 {
 			l.emit(OutputMsg{
-				Role:    "usage",
-				Content: fmt.Sprintf("↑%d ↓%d tokens", resp.Usage.InputTokens, resp.Usage.OutputTokens),
+				Role:  "usage",
+				Usage: resp.Usage,
 			})
 		}