From 24c1b7e8ad0d8b202a06e1148894704d44dbe8f0 Mon Sep 17 00:00:00 2001
From: Shantur Rathore <i@shantur.com>
Date: Tue, 3 Mar 2026 15:07:49 +0000
Subject: [PATCH] fix(ui): treat compacted tool calls as zero tokens

---
 packages/ui/src/lib/token-utils.ts | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/packages/ui/src/lib/token-utils.ts b/packages/ui/src/lib/token-utils.ts
index 5654998c..158c58f3 100644
--- a/packages/ui/src/lib/token-utils.ts
+++ b/packages/ui/src/lib/token-utils.ts
@@ -22,6 +22,12 @@ export function getPartCharCount(part: ClientPart): number {
 
   if (part.type === "tool") {
     const state = (part as any).state
+    // Tool calls may be compacted server-side. When that happens we treat the
+    // tool payload as effectively absent from context for token estimation.
+    const compacted = (state as any)?.time?.compacted
+    if (compacted !== undefined && compacted !== null) {
+      return 0
+    }
     if (state) {
       if (state.input) {
         try {