From 52d2fd0196614da3bb1e271ff504d988b760118c Mon Sep 17 00:00:00 2001
From: Kieran Klukas <kieran@dunkirk.sh>
Date: Sat, 22 Aug 2026 10:16:54 -0400
Subject: [PATCH] feat: measure size of results

---
 src/client/app.css | 12 +++++++++---
 src/client/app.js  | 14 +++++++++++++-
 2 files changed, 22 insertions(+), 4 deletions(-)

diff --git a/src/client/app.css b/src/client/app.css
index e872e7b..3efb13e 100644
--- a/src/client/app.css
+++ b/src/client/app.css
@@ -1003,11 +1003,17 @@ body.selecting #selectBtn {
    the difference, and the bottom of the conversation is unreachable until a
    reload re-measures everything.
 
-   The growing turn is always the last one, so the last one is never skipped.
-   Older turns are static by the time they leave the viewport, which is the
+   The growing turn is USUALLY the last one, so the last one is never skipped.
+   The exception is a run that keeps going: its next message takes over as the
+   last turn while the previous one still has tools out, and their results land
+   documents in a turn that is now neither last nor generating. app.js marks any
+   turn it is still writing into `.live` (see assistantTurn).
+
+   Everything else is static by the time it leaves the viewport, which is the
    case content-visibility is actually good at. */
 .turn:last-child,
-.turn.generating {
+.turn.generating,
+.turn.live {
   content-visibility: visible;
 }
 .turn:first-child {
diff --git a/src/client/app.js b/src/client/app.js
index 5d82cb2..5363c5f 100644
--- a/src/client/app.js
+++ b/src/client/app.js
@@ -842,7 +842,19 @@ import { mountSidebar } from "./sidebar.js";
   }
 
   function assistantTurn(messageId) {
-    if (msgs[messageId]) return msgs[messageId];
+    var have = msgs[messageId];
+    if (have) {
+      // Every event for a turn arrives through here, which makes this the one
+      // place that knows a turn is still changing. A run's later messages push
+      // an earlier turn off `:last-child` while its tools are still out, and a
+      // tool result lands fifteen document cards in it — growth a SKIPPED turn
+      // never re-measures, which shortens `scrollHeight` and puts the end of the
+      // thread out of reach. Marking it keeps it measured for the rest of the
+      // session; history loads below stay skippable, which is where skipping
+      // earns its keep.
+      if (!bulkLoading) have.turn.classList.add("live");
+      return have;
+    }
     var t = makeTurn("Assistant", "generating");
     var rec = {
       turn: t,
-- 
2.51.2