Kward

Module: Kward::ModelStreamParser

Defined in:
lib/kward/model/stream_parser.rb

Overview

Parses streaming provider responses into Kward assistant messages.

ModelStreamParser is intentionally provider-shape focused and side-effect light: it accumulates assistant text, reasoning summaries, tool calls, and normalized usage from SSE events. Network IO, retries, credentials, and telemetry stay in Client; frontend rendering stays in CLI/RPC event handlers. Keep parser methods deterministic and easy to unit test with raw response bodies.

Class Method Summary collapse

Class Method Details

.active_codex_item(state) ⇒ Object 



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# File 'lib/kward/model/stream_parser.rb', line 427

def active_codex_item(state)
  key = state[:active_item_id]
  key ? state[:items_by_id][key] : nil
end

.active_or_known_codex_item(state, item) ⇒ Object 



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# File 'lib/kward/model/stream_parser.rb', line 412

def active_or_known_codex_item(state, item)
  key = codex_item_key(item)
  known = state[:items_by_id][key]
  return known if known

  active = active_codex_item(state)
  return active if active && (!codex_item_has_stable_key?(item) || codex_item_key(active) == key)

  nil
end

.anthropic_sse_error(data, request_error_class: nil) ⇒ Object 



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# File 'lib/kward/model/stream_parser.rb', line 157

def anthropic_sse_error(data, request_error_class: nil)
  if request_error_class
    request_error_class.new(provider: "Anthropic", code: 400, body: data)
  else
    data
  end
end

.anthropic_sse_message(state) ⇒ Object 



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# File 'lib/kward/model/stream_parser.rb', line 179

def anthropic_sse_message(state)
  message = { "role" => "assistant", "content" => state[:content] }
  message["reasoning_summary"] = state[:reasoning_summary] unless state[:reasoning_summary].empty?
  message["tool_calls"] = state[:tool_calls] unless state[:tool_calls].empty?
  message["usage"] = state[:usage] if state[:usage]
  message
end

.anthropic_sse_state ⇒ Object 



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# File 'lib/kward/model/stream_parser.rb', line 104

def anthropic_sse_state
  { content: +"", reasoning_summary: +"", blocks: {}, tool_calls: [], usage: nil }
end

.anthropic_tool_call(block_data) ⇒ Object 



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# File 'lib/kward/model/stream_parser.rb', line 165

def anthropic_tool_call(block_data)
  return nil unless block_data.is_a?(Hash) && block_data["type"] == "tool_use"

  name = from_claude_code_tool_name(block_data["name"])
  arguments = block_data["partial_json"].to_s
  arguments = JSON.dump(block_data["input"] || {}) if arguments.empty?
  arguments = "{}" if arguments.empty?
  {
    "id" => block_data["id"] || "call_#{name}",
    "type" => "function",
    "function" => { "name" => name, "arguments" => arguments }
  }
end

.codex_content_part_added(state, part) ⇒ Object 



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# File 'lib/kward/model/stream_parser.rb', line 304

def codex_content_part_added(state, part)
  item = active_codex_item(state)
  return unless item&.fetch("type", nil) == "message" && part.is_a?(Hash)
  return unless ["output_text", "text", "refusal"].include?(part["type"])

  item["content"] ||= []
  item["content"] << deep_dup_hash(part)
  state[:current_text_content_part] = item["content"].last
end

.codex_item_has_stable_key?(item) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/kward/model/stream_parser.rb', line 423

def codex_item_has_stable_key?(item)
  item.key?("id") || item.key?("call_id")
end

.codex_item_key(item) ⇒ Object 



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# File 'lib/kward/model/stream_parser.rb', line 443

def codex_item_key(item)
  item["id"] || item["call_id"] || "item_#{item.object_id}"
end

.codex_message_phase(item) ⇒ Object 



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# File 'lib/kward/model/stream_parser.rb', line 518

def codex_message_phase(item)
  item["phase"].to_s
end

.codex_output_item_added(state, item) ⇒ Object 



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# File 'lib/kward/model/stream_parser.rb', line 293

def codex_output_item_added(state, item)
  return unless item.is_a?(Hash)

  item = deep_dup_hash(item)
  item["content"] = [] if item["type"] == "message" && !item["content"].is_a?(Array)
  item["summary"] = [] if item["type"] == "reasoning" && !item["summary"].is_a?(Array)
  remember_codex_item(state, item)
  state[:active_item_id] = codex_item_key(item)
  state[:current_text_content_part] = nil
end

.codex_output_item_done(state, item, on_assistant_delta: nil, on_reasoning_delta: nil) ⇒ Object 



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# File 'lib/kward/model/stream_parser.rb', line 378

def codex_output_item_done(state, item, on_assistant_delta: nil, on_reasoning_delta: nil)
  return unless item.is_a?(Hash)

  item = merge_codex_item(active_or_known_codex_item(state, item), item)
  remember_codex_item(state, item)
  collect_codex_item_output(state, item, on_assistant_delta: on_assistant_delta, on_reasoning_delta: on_reasoning_delta)
  state[:active_item_id] = nil if state[:active_item_id] == codex_item_key(item)
  state[:current_text_content_part] = nil
end

.codex_output_text_delta(state, delta, on_assistant_delta: nil) ⇒ Object 



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# File 'lib/kward/model/stream_parser.rb', line 314

def codex_output_text_delta(state, delta, on_assistant_delta: nil)
  text = delta.to_s
  return if text.empty?

  item = active_codex_item(state)
  if item&.fetch("type", nil) == "message"
    item["content"] ||= [{ "type" => "output_text", "text" => +"" }]
    part = state[:current_text_content_part] || item["content"].last
    part = item["content"].last unless part.is_a?(Hash)
    part["type"] ||= "output_text"
    text_key = part["type"] == "refusal" ? "refusal" : "text"
    part[text_key] = part[text_key].to_s + text
  end
  state[:raw_content] << text
end

.codex_reasoning_delta(state, delta, on_reasoning_delta: nil) ⇒ Object 



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# File 'lib/kward/model/stream_parser.rb', line 338

def codex_reasoning_delta(state, delta, on_reasoning_delta: nil)
  text = delta.to_s
  return if text.empty?

  item = active_codex_item(state)
  if item&.fetch("type", nil) == "reasoning"
    item["summary"] ||= []
    item["summary"] << { "type" => "summary_text", "text" => +"" } if item["summary"].empty?
    item["summary"].last["text"] = item["summary"].last["text"].to_s + text
  end
  state[:reasoning_summary] << text
  on_reasoning_delta&.call(text)
end

.codex_reasoning_part_done(state, on_reasoning_delta: nil) ⇒ Object 



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# File 'lib/kward/model/stream_parser.rb', line 352

def codex_reasoning_part_done(state, on_reasoning_delta: nil)
  item = active_codex_item(state)
  return unless item&.fetch("type", nil) == "reasoning"
  return if item["summary"].to_a.empty?

  text = "\n\n"
  item["summary"].last["text"] = item["summary"].last["text"].to_s + text
  state[:reasoning_summary] << text
  on_reasoning_delta&.call(text)
end

.codex_reasoning_summary_part_added(state, part) ⇒ Object 



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# File 'lib/kward/model/stream_parser.rb', line 330

def codex_reasoning_summary_part_added(state, part)
  item = active_codex_item(state)
  return unless item&.fetch("type", nil) == "reasoning" && part.is_a?(Hash)

  item["summary"] ||= []
  item["summary"] << deep_dup_hash(part)
end

.codex_response_items(state) ⇒ Object 



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# File 'lib/kward/model/stream_parser.rb', line 522

def codex_response_items(state)
  state[:response_item_keys].filter_map { |key| state[:items_by_id][key] }
end

.codex_sse_error(event, request_error_class: nil) ⇒ Object 



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# File 'lib/kward/model/stream_parser.rb', line 276

def codex_sse_error(event, request_error_class: nil)
  response = event["response"]
  error = event["error"] || (response["error"] if response.is_a?(Hash)) || {}
  message = if error.is_a?(Hash)
              [error["code"], error["message"]].compact.join(": ")
            else
              error.to_s
            end
  message = event["type"].to_s if message.empty?
  code = error.is_a?(Hash) && error["code"].to_s == "server_error" ? 500 : 400
  if request_error_class
    request_error_class.new(provider: "Codex", code: code, body: "#{event["type"]}: #{message}")
  else
    "#{event["type"]}: #{message}"
  end
end

.codex_sse_message(state) ⇒ Object 



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# File 'lib/kward/model/stream_parser.rb', line 484

def codex_sse_message(state)
  message = { "role" => "assistant", "content" => codex_visible_content(state) }
  message["reasoning_summary"] = state[:reasoning_summary] unless state[:reasoning_summary].empty?
  message["tool_calls"] = state[:tool_calls] unless state[:tool_calls].empty?
  response_items = codex_response_items(state)
  message["response_items"] = response_items unless response_items.empty?
  message["usage"] = state[:usage] if state[:usage]
  message
end

.codex_sse_state ⇒ Object 



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# File 'lib/kward/model/stream_parser.rb', line 221

def codex_sse_state
  {
    content: +"",
    raw_content: +"",
    emitted_message_keys: [],
    reasoning_summary: +"",
    tool_calls: [],
    response_item_keys: [],
    items_by_id: {},
    active_item_id: nil,
    current_text_content_part: nil,
    usage: nil
  }
end

.codex_streamable_message_item?(item) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/kward/model/stream_parser.rb', line 514

def codex_streamable_message_item?(item)
  codex_message_phase(item) == "final_answer"
end

.codex_tool_arguments_delta(state, delta) ⇒ Object 



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# File 'lib/kward/model/stream_parser.rb', line 363

def codex_tool_arguments_delta(state, delta)
  item = active_codex_item(state)
  return unless item && ["function_call", "custom_tool_call"].include?(item["type"])

  key = item["type"] == "custom_tool_call" ? "input" : "arguments"
  item[key] = item[key].to_s + delta.to_s
end

.codex_tool_arguments_done(state, arguments) ⇒ Object 



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# File 'lib/kward/model/stream_parser.rb', line 371

def codex_tool_arguments_done(state, arguments)
  item = active_codex_item(state)
  return unless item&.fetch("type", nil) == "function_call"

  item["arguments"] = arguments.to_s
end

.codex_tool_call(item) ⇒ Object 



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# File 'lib/kward/model/stream_parser.rb', line 526

def codex_tool_call(item)
  return nil unless item.is_a?(Hash) && ["function_call", "custom_tool_call"].include?(item["type"])

  name = item["name"].to_s
  return nil if name.empty?

  arguments = item["arguments"] || item["input"] || "{}"
  arguments = JSON.dump(arguments) unless arguments.is_a?(String)
  {
    "id" => (item["call_id"] || item["id"] || "call_#{name}"),
    "type" => "function",
    "function" => { "name" => name, "arguments" => arguments }
  }
end

.codex_visible_content(state) ⇒ Object 



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# File 'lib/kward/model/stream_parser.rb', line 494

def codex_visible_content(state)
  return state[:content] unless state[:content].empty?

  response_items = codex_response_items(state)
  visible_text = text_from_codex_items(visible_codex_message_items(response_items, tool_calls: state[:tool_calls]))
  return visible_text unless visible_text.empty?
  return "" unless state[:tool_calls].empty?

  state[:raw_content]
end

.collect_codex_item_output(state, item, on_assistant_delta: nil, on_reasoning_delta: nil) ⇒ Object 



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# File 'lib/kward/model/stream_parser.rb', line 388

def collect_codex_item_output(state, item, on_assistant_delta: nil, on_reasoning_delta: nil)
  case item["type"]
  when "message"
    text = text_from_codex_items([item])
    return if text.empty? || !codex_streamable_message_item?(item)

    state[:content] << text
    key = codex_item_key(item)
    unless state[:emitted_message_keys].include?(key)
      on_assistant_delta&.call(text)
      state[:emitted_message_keys] << key
    end
  when "reasoning"
    text = reasoning_summary_from_codex_items([item])
    if state[:reasoning_summary].empty? && !text.empty?
      state[:reasoning_summary] << text
      on_reasoning_delta&.call(text)
    end
  when "function_call", "custom_tool_call"
    tool_call = codex_tool_call(item)
    state[:tool_calls] << tool_call if tool_call && !state[:tool_calls].any? { |call| call["id"] == tool_call["id"] }
  end
end

.deep_dup(value) ⇒ Object 



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# File 'lib/kward/model/stream_parser.rb', line 471

def deep_dup(value)
  case value
  when Hash
    value.each_with_object({}) { |(key, entry), result| result[key] = deep_dup(entry) }
  when Array
    value.map { |entry| deep_dup(entry) }
  when String
    value.dup
  else
    value
  end
end

.deep_dup_hash(hash) ⇒ Object 



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# File 'lib/kward/model/stream_parser.rb', line 467

def deep_dup_hash(hash)
  deep_dup(hash)
end

.finalized_streaming_tool_calls(tool_calls) ⇒ Object 



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# File 'lib/kward/model/stream_parser.rb', line 211

def finalized_streaming_tool_calls(tool_calls)
  tool_calls.compact.each_with_index.map do |tool_call, index|
    tool_call["id"] ||= "call_#{index}"
    tool_call["type"] ||= "function"
    tool_call["function"] ||= { "name" => "", "arguments" => "{}" }
    tool_call["function"]["arguments"] = "{}" if tool_call["function"]["arguments"].to_s.empty?
    tool_call
  end
end

.from_claude_code_tool_name(name) ⇒ Object 



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# File 'lib/kward/model/stream_parser.rb', line 187

def from_claude_code_tool_name(name)
  case name.to_s
  when "Read" then "read_file"
  when "Write" then "write_file"
  when "Edit" then "edit_file"
  when "Bash" then "run_shell_command"
  when "WebSearch" then "web_search"
  when "WebFetch" then "fetch_content"
  when "AskUserQuestion" then "ask_user_question"
  else name.to_s
  end
end

.merge_codex_item(existing, update) ⇒ Object 



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# File 'lib/kward/model/stream_parser.rb', line 447

def merge_codex_item(existing, update)
  return deep_dup_hash(update) unless existing.is_a?(Hash)

  merged = deep_dup_hash(existing)
  update.each do |key, value|
    next if value.nil?

    merged[key] = if key == "content" && merged[key].is_a?(Array) && value.is_a?(Array)
                    value.empty? ? merged[key] : value
                  elsif key == "summary" && merged[key].is_a?(Array) && value.is_a?(Array)
                    value.empty? ? merged[key] : value
                  elsif key == "arguments" && value.to_s.empty? && !merged[key].to_s.empty?
                    merged[key]
                  else
                    deep_dup(value)
                  end
  end
  merged
end

.merge_streaming_tool_call(tool_calls, delta) ⇒ Object 



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# File 'lib/kward/model/stream_parser.rb', line 200

def merge_streaming_tool_call(tool_calls, delta)
  index = (delta["index"] || tool_calls.length).to_i
  tool_calls[index] ||= { "id" => nil, "type" => "function", "function" => { "name" => "", "arguments" => "" } }
  current = tool_calls[index]
  current["id"] = delta["id"] if delta["id"]
  current["type"] = delta["type"] if delta["type"]
  function = delta["function"] || {}
  current["function"]["name"] << function["name"].to_s if function["name"]
  current["function"]["arguments"] << function["arguments"].to_s if function["arguments"]
end

.parse_anthropic_sse_stream(response, on_reasoning_delta: nil, on_assistant_delta: nil, cancellation: nil, usage_normalizer: nil, request_error_class: nil) ⇒ Object 



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# File 'lib/kward/model/stream_parser.rb', line 84

def parse_anthropic_sse_stream(response, on_reasoning_delta: nil, on_assistant_delta: nil, cancellation: nil, usage_normalizer: nil, request_error_class: nil)
  state = anthropic_sse_state
  buffer = +""
  response.read_body do |chunk|
    cancellation&.raise_if_cancelled!
    buffer << chunk
    while (index = buffer.index(/\r?\n\r?\n/))
      delimiter = Regexp.last_match[0]
      block = buffer[0...index]
      buffer = buffer[(index + delimiter.length)..] || +""
      process_anthropic_sse_block(block, state, on_reasoning_delta: on_reasoning_delta, on_assistant_delta: on_assistant_delta, usage_normalizer: usage_normalizer, request_error_class: request_error_class)
    end
  end
  cancellation&.raise_if_cancelled!
  process_anthropic_sse_block(buffer, state, on_reasoning_delta: on_reasoning_delta, on_assistant_delta: on_assistant_delta, usage_normalizer: usage_normalizer, request_error_class: request_error_class) unless buffer.empty?
  anthropic_sse_message(state)
rescue JSON::ParserError => e
  raise "Anthropic returned invalid SSE JSON: #{e.message}"
end

.parse_codex_sse(body, on_reasoning_delta: nil, on_assistant_delta: nil, usage_normalizer: nil, request_error_class: nil) ⇒ Object 



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# File 'lib/kward/model/stream_parser.rb', line 48

def parse_codex_sse(body, on_reasoning_delta: nil, on_assistant_delta: nil, usage_normalizer: nil, request_error_class: nil)
  state = codex_sse_state
  body.split(/\r?\n\r?\n/).each do |block|
    process_codex_sse_block(block, state, on_reasoning_delta: on_reasoning_delta, on_assistant_delta: on_assistant_delta, usage_normalizer: usage_normalizer, request_error_class: request_error_class)
  end
  codex_sse_message(state)
rescue JSON::ParserError => e
  raise "Codex OAuth returned invalid SSE JSON: #{e.message}"
end

.parse_codex_sse_stream(response, on_reasoning_delta: nil, on_assistant_delta: nil, cancellation: nil, usage_normalizer: nil, request_error_class: nil) ⇒ Object

Incrementally parses a Codex/Responses SSE HTTP response body.

Deltas are yielded as soon as complete SSE blocks arrive so interactive frontends can render streamed assistant and reasoning text without waiting for the provider to close the response.



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# File 'lib/kward/model/stream_parser.rb', line 63

def parse_codex_sse_stream(response, on_reasoning_delta: nil, on_assistant_delta: nil, cancellation: nil, usage_normalizer: nil, request_error_class: nil)
  state = codex_sse_state
  buffer = +""

  response.read_body do |chunk|
    cancellation&.raise_if_cancelled!
    buffer << chunk
    while (index = buffer.index(/\r?\n\r?\n/))
      delimiter = Regexp.last_match[0]
      block = buffer[0...index]
      buffer = buffer[(index + delimiter.length)..] || +""
      process_codex_sse_block(block, state, on_reasoning_delta: on_reasoning_delta, on_assistant_delta: on_assistant_delta, usage_normalizer: usage_normalizer, request_error_class: request_error_class)
    end
  end
  cancellation&.raise_if_cancelled!
  process_codex_sse_block(buffer, state, on_reasoning_delta: on_reasoning_delta, on_assistant_delta: on_assistant_delta, usage_normalizer: usage_normalizer, request_error_class: request_error_class) unless buffer.empty?
  codex_sse_message(state)
rescue JSON::ParserError => e
  raise "Codex OAuth returned invalid SSE JSON: #{e.message}"
end

.parse_openai_chat_sse(body, on_assistant_delta: nil, usage_normalizer: nil) ⇒ Object 



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# File 'lib/kward/model/stream_parser.rb', line 16

def parse_openai_chat_sse(body, on_assistant_delta: nil, usage_normalizer: nil)
  content = +""
  tool_calls = []
  usage = nil
  body.split(/\r?\n\r?\n/).each do |block|
    data = block.lines.filter_map { |line| line.start_with?("data:") ? line.delete_prefix("data:").strip : nil }.join("\n")
    next if data.empty? || data == "[DONE]"

    event = JSON.parse(data)
    usage ||= usage_normalizer&.call(event["usage"])
    choice = Array(event["choices"]).first || {}
    delta = choice["delta"] || {}
    if delta["content"]
      text = delta["content"].to_s
      content << text
      on_assistant_delta&.call(text)
    end
    Array(delta["tool_calls"]).each do |tool_call|
      merge_streaming_tool_call(tool_calls, tool_call)
    end
    message = choice["message"] || {}
    content << message["content"].to_s if content.empty? && message["content"]
    Array(message["tool_calls"]).each { |tool_call| merge_streaming_tool_call(tool_calls, tool_call) }
  end
  result = { "role" => "assistant", "content" => content }
  result["tool_calls"] = finalized_streaming_tool_calls(tool_calls) unless tool_calls.empty?
  result["usage"] = usage if usage
  result
rescue JSON::ParserError => e
  raise "Copilot returned invalid SSE JSON: #{e.message}"
end

.process_anthropic_sse_block(block, state, on_reasoning_delta: nil, on_assistant_delta: nil, usage_normalizer: nil, request_error_class: nil) ⇒ Object 



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# File 'lib/kward/model/stream_parser.rb', line 108

def process_anthropic_sse_block(block, state, on_reasoning_delta: nil, on_assistant_delta: nil, usage_normalizer: nil, request_error_class: nil)
  event_name = nil
  data = block.lines.filter_map do |line|
    event_name = line.delete_prefix("event:").strip if line.start_with?("event:")
    line.start_with?("data:") ? line.delete_prefix("data:").strip : nil
  end.join("\n")
  return if data.empty? || data == "[DONE]"
  raise anthropic_sse_error(data, request_error_class: request_error_class) if event_name == "error"

  event = JSON.parse(data)
  case event["type"]
  when "message_start"
    state[:usage] ||= usage_normalizer&.call(event.dig("message", "usage"))
  when "content_block_start"
    block_data = event["content_block"] || {}
    state[:blocks][event["index"].to_i] = block_data.merge("partial_json" => "")
    if block_data["type"] == "text"
      text = block_data["text"].to_s
      state[:content] << text
      on_assistant_delta&.call(text) unless text.empty?
    elsif block_data["type"] == "thinking"
      text = block_data["thinking"].to_s
      state[:reasoning_summary] << text
      on_reasoning_delta&.call(text) unless text.empty?
    end
  when "content_block_delta"
    current = state[:blocks][event["index"].to_i] ||= { "partial_json" => "" }
    delta = event["delta"] || {}
    case delta["type"]
    when "text_delta"
      text = delta["text"].to_s
      state[:content] << text
      on_assistant_delta&.call(text)
    when "thinking_delta"
      text = delta["thinking"].to_s
      state[:reasoning_summary] << text
      on_reasoning_delta&.call(text)
    when "input_json_delta"
      current["partial_json"] = current["partial_json"].to_s + delta["partial_json"].to_s
    end
  when "content_block_stop"
    block_data = state[:blocks][event["index"].to_i]
    tool_call = anthropic_tool_call(block_data)
    state[:tool_calls] << tool_call if tool_call
  when "message_delta"
    state[:usage] = usage_normalizer&.call(event["usage"]) || state[:usage]
  end
end

.process_codex_sse_block(block, state, on_reasoning_delta: nil, on_assistant_delta: nil, usage_normalizer: nil, request_error_class: nil) ⇒ Object 



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# File 'lib/kward/model/stream_parser.rb', line 236

def process_codex_sse_block(block, state, on_reasoning_delta: nil, on_assistant_delta: nil, usage_normalizer: nil, request_error_class: nil)
  data = block.lines.filter_map { |line| line.start_with?("data:") ? line.delete_prefix("data:").strip : nil }.join("\n")
  return if data.empty? || data == "[DONE]"

  event = JSON.parse(data)
  case event["type"]
  when "response.output_item.added"
    codex_output_item_added(state, event["item"])
  when "response.content_part.added"
    codex_content_part_added(state, event["part"])
  when "response.output_text.delta", "response.refusal.delta"
    codex_output_text_delta(state, event["delta"], on_assistant_delta: on_assistant_delta)
  when "response.reasoning_summary_part.added"
    codex_reasoning_summary_part_added(state, event["part"])
  when "response.reasoning_summary_text.delta"
    codex_reasoning_delta(state, event["delta"], on_reasoning_delta: on_reasoning_delta)
  when "response.reasoning_summary_part.done"
    codex_reasoning_part_done(state, on_reasoning_delta: on_reasoning_delta)
  when "response.reasoning_text.delta"
    codex_reasoning_delta(state, event["delta"], on_reasoning_delta: on_reasoning_delta)
  when "response.function_call_arguments.delta", "response.custom_tool_call_input.delta"
    codex_tool_arguments_delta(state, event["delta"])
  when "response.function_call_arguments.done"
    codex_tool_arguments_done(state, event["arguments"])
  when "response.output_item.done"
    codex_output_item_done(state, event["item"], on_assistant_delta: on_assistant_delta, on_reasoning_delta: on_reasoning_delta)
  when "response.completed"
    response = event["response"]
    state[:usage] ||= usage_normalizer&.call(response["usage"]) if response.is_a?(Hash)
    state[:usage] ||= usage_normalizer&.call(event["usage"])
    if response.is_a?(Hash) && response["output"].is_a?(Array) && state[:response_item_keys].empty?
      response["output"].each do |item|
        codex_output_item_done(state, item, on_assistant_delta: on_assistant_delta, on_reasoning_delta: on_reasoning_delta)
      end
    end
  when "response.failed", "response.incomplete"
    raise codex_sse_error(event, request_error_class: request_error_class)
  end
end

.reasoning_summary_from_codex_items(items) ⇒ Object 



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# File 'lib/kward/model/stream_parser.rb', line 555

def reasoning_summary_from_codex_items(items)
  items.flat_map do |item|
    next [] unless item.is_a?(Hash)

    if item["type"] == "reasoning" && item["summary"].is_a?(Array)
      item["summary"].filter_map { |part| part["text"] if part.is_a?(Hash) }
    else
      []
    end
  end.join
end

.remember_codex_item(state, item) ⇒ Object 



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# File 'lib/kward/model/stream_parser.rb', line 432

def remember_codex_item(state, item)
  key = codex_item_key(item)
  if state[:items_by_id].key?(key)
    stored = state[:items_by_id][key]
    stored.replace(merge_codex_item(stored, item))
  else
    state[:items_by_id][key] = item
    state[:response_item_keys] << key
  end
end

.text_from_codex_items(items) ⇒ Object 



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# File 'lib/kward/model/stream_parser.rb', line 541

def text_from_codex_items(items)
  items.flat_map do |item|
    next [] unless item.is_a?(Hash)

    if ["output_text", "text"].include?(item["type"])
      item["text"].to_s
    elsif item["type"] == "message" && item["content"].is_a?(Array)
      item["content"].filter_map { |part| part["text"] if part.is_a?(Hash) && ["output_text", "text"].include?(part["type"]) }
    else
      []
    end
  end.join
end

.visible_codex_message_items(items, tool_calls: []) ⇒ Object 



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# File 'lib/kward/model/stream_parser.rb', line 505

def visible_codex_message_items(items, tool_calls: [])
  messages = Array(items).select { |item| item.is_a?(Hash) && item["type"] == "message" }
  final_messages = messages.select { |item| codex_message_phase(item) == "final_answer" }
  return final_messages unless final_messages.empty?
  return [] unless tool_calls.empty?

  messages.reject { |item| codex_message_phase(item) == "commentary" }
end