diff --git a/CHANGELOG.md b/CHANGELOG.md
index f83d2346..c9328df5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,7 +5,6 @@
 ### Fixed
 
 - Surface live tool activity when Hermes Agent reports tools through its dedicated `tool_start_callback` / `tool_complete_callback` path, so browser chat shows the existing running tool cards instead of appearing idle until the final answer.
-- Keep the composer usable if a transient restart/proxy blip prevents `commands.js` from loading while `boot.js` still attaches slash-command listeners.
 
 
 ## [v0.51.93] — 2026-05-19 — Release BQ (stage-386 — 10-PR full sweep batch — RFC Slice 4 runner/sidecar gate + workspace tree toggle width CSS variable + settled file:// markdown link rendering + prompt-cache coverage percentage fix + terminal shell shutdown reap + configured model picker provider preservation + profile-aware assistant display names + state.db reconciliation slice 1 + queued-message cross-session drain fix + stale-stream writeback supersede)
diff --git a/api/streaming.py b/api/streaming.py
index 76b92b9e..e7ca4a82 100644
--- a/api/streaming.py
+++ b/api/streaming.py
@@ -3525,6 +3525,13 @@ def _run_agent_streaming(
 
                 args_snap = _tool_args_snapshot(args)
 
+                # Modern Hermes Agent builds can call both tool_progress_callback
+                # and the structured tool_start/tool_complete callbacks for the
+                # same tool. Prefer the structured path when it is supported so
+                # the browser receives one tid-tagged tool card per real call.
+                if event_type in (None, 'tool.started') and 'tool_start_callback' in _agent_params:
+                    return
+
                 if event_type in (None, 'tool.started'):
                     _live_tool_calls.append({
                         'name': name,
@@ -3560,6 +3567,9 @@ def _run_agent_streaming(
                         pass
                     return
 
+                if event_type == 'tool.completed' and 'tool_complete_callback' in _agent_params:
+                    return
+
                 if event_type == 'tool.completed':
                     for live_tc in reversed(_live_tool_calls):
                         if live_tc.get('done'):
diff --git a/static/boot.js b/static/boot.js
index eda383a4..9a30fe8e 100644
--- a/static/boot.js
+++ b/static/boot.js
@@ -1,20 +1,3 @@
-// Slash-command helpers normally come from commands.js, which is loaded before
-// boot.js. If a restart/proxy blip makes that asset fail while boot.js loads,
-// keep the composer usable instead of throwing ReferenceError on input/keydown.
-(function(){
-  function dropdown(){ return document.getElementById('cmdDropdown'); }
-  if(typeof window.hideCmdDropdown!=='function'){
-    window.hideCmdDropdown=function(){
-      const dd=dropdown();
-      if(dd){ dd.classList.remove('open'); dd.style.display='none'; }
-    };
-  }
-  if(typeof window.showCmdDropdown!=='function') window.showCmdDropdown=function(){};
-  if(typeof window.getMatchingCommands!=='function') window.getMatchingCommands=function(){ return []; };
-  if(typeof window.navigateCmdDropdown!=='function') window.navigateCmdDropdown=function(){};
-  if(typeof window.selectCmdDropdownItem!=='function') window.selectCmdDropdownItem=function(){};
-})();
-
 async function cancelStream(){
   const streamId = S.activeStreamId;
   if(!streamId) return;
diff --git a/tests/test_command_asset_fallbacks.py b/tests/test_command_asset_fallbacks.py
deleted file mode 100644
index 2d1bcefc..00000000
--- a/tests/test_command_asset_fallbacks.py
+++ /dev/null
@@ -1,30 +0,0 @@
-from pathlib import Path
-
-
-ROOT = Path(__file__).resolve().parents[1]
-
-
-def _read(relpath: str) -> str:
-    return (ROOT / relpath).read_text(encoding="utf-8")
-
-
-def test_boot_installs_safe_slash_command_fallbacks_when_commands_asset_missing():
-    boot = _read("static/boot.js")
-
-    assert "If a restart/proxy blip makes that asset fail" in boot
-    for name in (
-        "hideCmdDropdown",
-        "showCmdDropdown",
-        "getMatchingCommands",
-        "navigateCmdDropdown",
-        "selectCmdDropdownItem",
-    ):
-        assert f"typeof window.{name}!==\'function\'" in boot or f"typeof window.{name}!='function'" in boot
-
-
-def test_commands_asset_still_owns_real_dropdown_implementation():
-    commands = _read("static/commands.js")
-
-    assert "function hideCmdDropdown()" in commands
-    assert "function showCmdDropdown(" in commands
-    assert "function getMatchingCommands(" in commands
diff --git a/tests/test_live_tool_callback_events.py b/tests/test_live_tool_callback_events.py
index 0e5dd3ee..74c8b343 100644
--- a/tests/test_live_tool_callback_events.py
+++ b/tests/test_live_tool_callback_events.py
@@ -52,6 +52,16 @@ def test_tool_complete_callback_emits_existing_tool_complete_sse_event_with_tool
     assert "_checkpoint_activity[0] += 1" in block
 
 
+def test_legacy_progress_events_are_suppressed_when_structured_callbacks_are_wired():
+    src = _read("api/streaming.py")
+    block = _function_block(src, "on_tool")
+
+    assert "event_type in (None, 'tool.started') and 'tool_start_callback' in _agent_params" in block
+    assert "event_type == 'tool.completed' and 'tool_complete_callback' in _agent_params" in block
+    assert block.index("'tool_start_callback' in _agent_params") < block.index("put('tool'")
+    assert block.index("'tool_complete_callback' in _agent_params") < block.index("put('tool_complete'")
+
+
 def test_tool_callback_events_keep_existing_frontend_event_contract():
     messages = _read("static/messages.js")
     ui = _read("static/ui.js")