diff --git a/frontend/app.js b/frontend/app.js
index f47c0e4a..c68fef76 100644
--- a/frontend/app.js
+++ b/frontend/app.js
@@ -2674,11 +2674,17 @@ class AppController {
           this._ceoTerm?.appendMessage({ role: 'system', text: '/clear only works in EA chat.', source: 'system' });
           return;
         }
-        // Forget old conversation and create a new one
-        this._eaChatConvId = null;
-        localStorage.removeItem('ea-chat-conv-id');
-        await this._ensureEaChatConversation();
-        this._ceoTerm?.showChat(this._EA_CHAT, []);
+        if (!this._eaChatConvId) {
+          await this._ensureEaChatConversation();
+        }
+        if (!this._eaChatConvId) return;
+        try {
+          const resp = await fetch(`/api/conversation/${this._eaChatConvId}/clear`, { method: 'POST' });
+          if (!resp.ok) throw new Error(`Server error (${resp.status})`);
+          this._ceoTerm?.showChat(this._EA_CHAT, []);
+        } catch (e) {
+          this._ceoTerm?.appendMessage({ role: 'system', text: `Failed to clear chat: ${e.message}`, source: 'system' });
+        }
       }},
     ];
   }
diff --git a/package.json b/package.json
index 21ed7373..304c5aa1 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@1mancompany/onemancompany",
-  "version": "0.7.77",
+  "version": "0.7.78",
   "description": "The AI Operating System for One-Person Companies",
   "bin": {
     "onemancompany": "bin/cli.js"
diff --git a/pyproject.toml b/pyproject.toml
index d3de0a5f..0b2023fc 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "onemancompany"
-version = "0.7.77"
+version = "0.7.78"
 description = "A one-man company simulation with pixel art visualization and LangChain AI agents"
 requires-python = ">=3.12"
 dependencies = [
diff --git a/src/onemancompany/api/routes.py b/src/onemancompany/api/routes.py
index d0c27f9b..56ca1e18 100644
--- a/src/onemancompany/api/routes.py
+++ b/src/onemancompany/api/routes.py
@@ -6783,14 +6783,14 @@ async def close_conversation(conv_id: str, wait_hooks: bool = False) -> dict:
 
 @router.post("/api/conversation/{conv_id}/clear")
 async def clear_conversation_history(conv_id: str) -> dict:
-    """Clear all 1-on-1 message history for the current conversation's employee."""
+    """Clear message history for all same-type conversations of this employee."""
     try:
         conv = _get_conv_svc().get(conv_id)
     except ValueError:
         raise HTTPException(status_code=404, detail="Conversation not found")
 
-    if conv.type != "oneonone":
-        raise HTTPException(status_code=400, detail="Clear history is only supported for oneonone conversations")
+    if conv.type not in (ConversationType.ONE_ON_ONE.value, ConversationType.EA_CHAT.value):
+        raise HTTPException(status_code=400, detail="Clear history is only supported for oneonone and ea_chat conversations")
     if not conv.employee_id:
         raise HTTPException(status_code=400, detail="Conversation has no employee_id")
 
@@ -6818,7 +6818,7 @@ async def clear_conversation_history(conv_id: str) -> dict:
         except Exception:
             logger.warning("[conversation] skip unreadable meta when clearing history: {}", conv_dir)
             continue
-        if c.type != "oneonone" or c.employee_id != conv.employee_id:
+        if c.type != conv.type or c.employee_id != conv.employee_id:
             continue
         scanned += 1
         msg_path = conv_dir / "messages.yaml"
diff --git a/tests/integration/test_conversation_api.py b/tests/integration/test_conversation_api.py
index 4ce378fc..b6da4c17 100644
--- a/tests/integration/test_conversation_api.py
+++ b/tests/integration/test_conversation_api.py
@@ -183,6 +183,56 @@ async def test_clear_current_agent_oneonone_history(client, tmp_path):
     assert resp.json()["id"] == conv_id_current
 
 
+@pytest.mark.asyncio
+async def test_clear_ea_chat_history_persists_across_reopen(client, tmp_path):
+    # Old EA chat with history
+    resp = await client.post("/api/conversation/create", json={
+        "type": "ea_chat",
+        "employee_id": "00004",
+        "tools_enabled": True,
+    })
+    conv_id_old = resp.json()["id"]
+
+    msg_path_old = tmp_path / "employees" / "00004" / "conversations" / conv_id_old / "messages.yaml"
+    msg_path_old.parent.mkdir(parents=True, exist_ok=True)
+    msg_path_old.write_text(yaml.dump([
+        {"sender": "ceo", "role": "CEO", "text": "legacy ea", "timestamp": "2026-03-19T00:00:00+00:00", "attachments": []},
+    ], allow_unicode=True), encoding="utf-8")
+
+    await client.post(f"/api/conversation/{conv_id_old}/close")
+
+    # Start a new current EA chat
+    resp = await client.post("/api/conversation/create", json={
+        "type": "ea_chat",
+        "employee_id": "00004",
+        "tools_enabled": True,
+        "reuse_existing": False,
+    })
+    conv_id_current = resp.json()["id"]
+    assert conv_id_current != conv_id_old
+
+    # Clear current EA chat history
+    resp = await client.post(f"/api/conversation/{conv_id_current}/clear")
+    assert resp.status_code == 200
+    data = resp.json()
+    assert data["status"] == "cleared"
+    assert data["employee_id"] == "00004"
+
+    # Old history should be wiped on disk
+    assert yaml.safe_load(msg_path_old.read_text(encoding="utf-8")) == []
+
+    # Reopen EA chat should not bring old history back
+    resp = await client.post("/api/conversation/create", json={
+        "type": "ea_chat",
+        "employee_id": "00004",
+        "tools_enabled": True,
+    })
+    reopened_id = resp.json()["id"]
+    resp = await client.get(f"/api/conversation/{reopened_id}/messages")
+    assert resp.status_code == 200
+    assert resp.json()["messages"] == []
+
+
 @pytest.mark.asyncio
 async def test_create_invalid_type(client):
     resp = await client.post("/api/conversation/create", json={