Module: Legion::LLM::Inference::Steps::ToolCalls

Includes:
Logging, Legion::Logging::Helper
Included in:
Executor
Defined in:
lib/legion/llm/inference/steps/tool_calls.rb

Instance Method Summary collapse

Instance Method Details

#step_tool_calls ⇒ Object 



14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
 
# File 'lib/legion/llm/inference/steps/tool_calls.rb', line 14

def step_tool_calls
  unless @raw_response.respond_to?(:tool_calls) && @raw_response.tool_calls&.any?
    log_step_debug(:tool_calls, :skipped, reason: :no_tool_calls)
    return
  end

  tool_calls = @raw_response.tool_calls
  log_step_debug(:tool_calls, :start, tool_call_count: tool_calls.size)
  log.info(
    "[llm][tools] detected request_id=#{@request.id} " \
    "conversation_id=#{@request.conversation_id || 'none'} count=#{tool_calls.size}"
  )
  tool_calls.each do |tc|
    # G3: @raw_response.tool_calls is Array<Canonical::ToolCall> —
    # member reads only (the former tc[:name] Hash indexing raised
    # NoMethodError on canonical objects and was swallowed by the
    # step-level rescue, silently disabling this step).
    tool_name = tc.name
    tool_call_id = tc.id
    source = find_tool_source(tool_name)
    next unless source

    if client_passthrough_source?(source)
      log.info(
        "[llm][tools] client_passthrough request_id=#{@request.id} " \
        "tool_call_id=#{tool_call_id || 'none'} name=#{tool_name}"
      )
      log_step_debug(
        :tool_calls,
        :client_passthrough,
        tool_call_id: tool_call_id || 'none',
        tool_name:    tool_name
      )
      next
    end

    # Skip builtin tools; native providers handle provider-owned tools.
    if source[:type] == :builtin
      log.info(
        "[llm][tools] builtin_passthrough request_id=#{@request.id} " \
        "tool_call_id=#{tool_call_id || 'none'} name=#{tool_name}"
      )
      next
    end

    tool_exchange_id = Tracing.exchange_id
    log_tool_call_dispatch(tool_call_id, tool_name, source, tc.arguments)
    # The dispatcher is a daemon-internal Hash-consumer (registry/
    # extension/mcp execution) — the canonical tool call projects to
    # its wire shape at this boundary (member reads; G3).
    result = ToolDispatcher.dispatch(
      tool_call:   { id: tool_call_id, name: tool_name, arguments: tc.arguments },
      source:      source,
      exchange_id: tool_exchange_id
    )

    if @pending_tool_history
      lex_normalized = (source[:lex] || source[:extension] || '').delete_prefix('lex-').tr('-', '_')
      runner_key     = source[:type] == :extension ? "#{lex_normalized}_#{source[:runner]}" : nil
      result_string  = result[:result].is_a?(String) ? result[:result] : Legion::JSON.dump(result[:result] || {})
      @pending_tool_history_mutex.synchronize do
        @pending_tool_history << {
          tool_call_id:  tool_call_id,
          pending_index: @pending_tool_history.size,
          tool_name:     tool_name,
          args:          tc.arguments,
          result:        result_string,
          error:         result[:status] == :error,
          runner_key:    runner_key
        }
      end
    end

    # :source is the display string (native SSE surface);
    # :source_type is the canonical dispatch-type enum consumed by
    # the response-exit reconstruction (G3).
    @timeline.record(
      category: :tool, key: "tool:execute:#{tool_name}",
      exchange_id: tool_exchange_id, direction: :outbound,
      detail: "#{result[:status]} via #{source[:type]}",
      from: 'pipeline', to: "tool:#{tool_name}",
      duration_ms: result[:duration_ms],
      data: {
        tool_call_id: tool_call_id,
        arguments:    tc.arguments,
        source:       describe_tool_source(source),
        source_type:  source[:type]&.to_sym,
        status:       result[:status]
      }
    )

    @timeline.record(
      category: :tool, key: "tool:result:#{tool_name}",
      exchange_id: tool_exchange_id, direction: :inbound,
      detail: result[:result].to_s[0, Legion::Settings[:llm][:tools][:result_detail_chars]].to_s,
      from: "tool:#{tool_name}", to: 'pipeline',
      data: {
        tool_call_id: tool_call_id,
        status:       result[:status],
        result:       result[:result]
      }
    )

    log_tool_call_result(tool_call_id, tool_name, result)
  end
rescue StandardError => e
  @warnings << "Tool call handling error: #{e.message}"
  handle_exception(e, level: :warn, operation: 'llm.pipeline.steps.tool_calls')
end