Discard terminal artifact packets

1 files changed, 22 insertions, 1 deletions

diff --git a/lua/clever_f/acquisition_service.lua b/lua/clever_f/acquisition_service.lua
index 99edf83..707f568 100644
--- a/lua/clever_f/acquisition_service.lua
+++ b/lua/clever_f/acquisition_service.lua
@@ -301,6 +301,27 @@ function AcquisitionService:started_scope_count()
   return service_records[self].started_scope_count
 end
 
+function M.is_terminal_artifact(packet)
+  packet = domain.InputPacket.from_table(packet)
+  if packet.kind ~= domain.InputPacketKind.RAW_BYTES then
+    return false
+  end
+  local bytes = packet:bytes()
+  return #bytes == 3
+    and bytes[1] == 0x80
+    and bytes[2] == 0xfd
+    and bytes[3] == 0x60
+end
+
+local function read_input_packet(host)
+  while true do
+    local packet = domain.InputPacket.from_table(host:read_input())
+    if not M.is_terminal_artifact(packet) then
+      return packet
+    end
+  end
+end
+
 local function direct_preview_settings(policy_service)
   if type(policy_service.sample_direct_preview) == "function" then
     return policy_service:sample_direct_preview()
@@ -356,7 +377,7 @@ function AcquisitionService:acquire(descriptor, context, position, count, macro_
     record.host:show_prompt(M.PROMPT)
   end
   record.transitions:BeginAcquisition(request.context, request.descriptor)
-  scope:set_input_packet(domain.InputPacket.from_table(record.host:read_input()))
+  scope:set_input_packet(read_input_packet(record.host))
   return request
 end