Stage 376: PR #2441

# Conflicts:
#	CHANGELOG.md

CHANGELOG.md

@@ -6,6 +6,7 @@
 
 - Keep the default-off `HERMES_WEBUI_RUNTIME_ADAPTER=legacy-journal` chat-start path response-compatible with the legacy-direct path by not adding adapter-internal `run_id`, `status`, or `active_controls` fields to `/api/chat/start` responses. Fixes #2435.
 - Recover already-journaled visible assistant text and tool cards even when restart repair first syncs a populated Hermes core transcript into an otherwise empty WebUI sidecar. The core-sync branch now merges non-duplicate run-journal output before clearing stale stream state, closing the rare #2427 carve-out where recoverable partial output could be silently skipped. Fixes #2434.
+- Compact live Thinking cards now reuse the same timeline card across sequential tool calls, preventing repeated Thinking cards from stacking during one multi-tool turn.
 
 ## [v0.51.82] — 2026-05-17 — Release BF (stage-375 — 2-PR batch — table renderer pipe protection + Catppuccin appearance skin)
 

static/ui.js

@@ -7040,7 +7040,7 @@ function finalizeThinkingCard(){
       const summary=group.querySelector('.tool-call-group-summary');
       if(summary) summary.setAttribute('aria-expanded','false');
     }
-    const active=group.querySelector('.agent-activity-thinking[data-thinking-active="1"]');
+    const active=turn.querySelector('.agent-activity-thinking[data-thinking-active="1"]');
     if(active) active.removeAttribute('data-thinking-active');
     _syncToolCallGroupSummary(group);
   }
@@ -7095,6 +7095,11 @@ function appendThinking(text='', options){
   }
   const thinkingText=String(text||'').trim()||'Thinking…';
   let row=blocks.querySelector('.agent-activity-thinking[data-thinking-active="1"]');
+  if(!row){
+    const thinkingCards=Array.from(blocks.querySelectorAll('.agent-activity-thinking'));
+    row=thinkingCards.filter(el=>el.closest('.assistant-turn-blocks')===blocks).pop()||null;
+    if(row) row.setAttribute('data-thinking-active','1');
+  }
   if(!row){
     row=_thinkingActivityNode(thinkingText, false);
     row.setAttribute('data-thinking-active','1');

tests/test_ui_tool_call_cleanup.py

@@ -307,6 +307,13 @@ class TestToolCallGroupingStatic:
         assert "body.querySelector" in live_tool_fn and "data-live-tid" in live_tool_fn, (
             "tool_complete must still update its current live Activity burst by tool id."
         )
+        finalize_fn = _function_body(UI_JS, "finalizeThinkingCard")
+        assert "turn.querySelector('.agent-activity-thinking[data-thinking-active=\"1\"]')" in finalize_fn, (
+            "Compact Thinking cards live directly in assistant-turn blocks, so finalization must clear the active marker from the whole turn, not only the tool group."
+        )
+        assert "thinkingCards.filter" in live_thinking_fn and "setAttribute('data-thinking-active','1')" in live_thinking_fn, (
+            "Compact live thinking should reactivate the latest existing Thinking card instead of stacking a new card after every tool boundary."
+        )
         close_activity_fn = _function_body(MESSAGES_JS, "_closeCurrentLiveActivityGroup")
         assert "data-live-activity-current" in close_activity_fn, (
             "Visible interim assistant boundaries should close the previous live Activity burst."