Class: Ask::Agent::Session

Inherits:
Object
  • Object
show all
Defined in:
lib/ask/agent/session.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(model:, tools: [], max_turns: 25, max_tool_retries: 3, compactor: nil, hooks: {}, persistence: nil, id: nil, system_prompt: nil, parallel_tools: true, reflector: nil, telemetry: true, meta_agent: nil, **chat_options) ⇒ Session

Returns a new instance of Session.



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
 
# File 'lib/ask/agent/session.rb', line 20

def initialize(model:, tools: [], max_turns: 25, max_tool_retries: 3,
               compactor: nil, hooks: {}, persistence: nil,
               id: nil, system_prompt: nil, parallel_tools: true,
               reflector: nil, telemetry: true, meta_agent: nil, **chat_options)
  @id = id || SecureRandom.uuid
  @max_turns = max_turns
  @max_tool_retries = max_tool_retries
  @parallel_tools = parallel_tools
  @event_handlers = { all: [] }
  @running = false
  @deleted = false
  @abort_requested = false
  @turn_count = 0
  @created_at = Time.now
  @_no_tools_instructed = false

  @telemetry = telemetry.is_a?(Telemetry) ? telemetry : Telemetry.new(enabled: !!telemetry)

  @chat = build_chat(model, system_prompt, tools, **chat_options)
  @tools = resolve_tools(tools)
  @loop = Loop.new(max_turns: max_turns)
  @tool_executor = ToolExecutor.new(max_retries: max_tool_retries, parallel: parallel_tools)
  @compactor = compactor ? build_compactor(compactor) : nil
  @hooks = Hooks.new(hooks)

  # Auto-discover skills and inject into system prompt
  @skills_registry = Ask::Skills.discover rescue nil
  if @skills_registry && !@skills_registry.names.empty?
    skill_text = @skills_registry.format_for_prompt
    if !skill_text.empty? && @chat.messages.any? { |m| m.role == :system }
      current = @chat.messages.find { |m| m.role == :system }.content.to_s
      @chat.with_instructions(current + skill_text)
    end
  end
  @persistence = persistence

  reflector_opts = reflector.is_a?(Hash) ? reflector : {}
  @reflector = if reflector
    Reflector.new(
      model: @chat,
      max_reflections: reflector_opts[:max_reflections] || 1
    )
  end

  @meta_agent_config = meta_agent
  @meta_agent_results = nil

  @compactor&.chat = @chat
end

Instance Attribute Details

#chat ⇒ Object (readonly)

Returns the value of attribute chat.



9
10
11
 
# File 'lib/ask/agent/session.rb', line 9

def chat
  @chat
end

#created_at ⇒ Object (readonly)

Returns the value of attribute created_at.



9
10
11
 
# File 'lib/ask/agent/session.rb', line 9

def created_at
  @created_at
end

#id ⇒ Object (readonly)

Returns the value of attribute id.



9
10
11
 
# File 'lib/ask/agent/session.rb', line 9

def id
  @id
end

#messages ⇒ Object (readonly)

Returns the value of attribute messages.



9
10
11
 
# File 'lib/ask/agent/session.rb', line 9

def messages
  @messages
end

#meta_agent_results ⇒ Object (readonly)

Returns the value of attribute meta_agent_results.



16
17
18
 
# File 'lib/ask/agent/session.rb', line 16

def meta_agent_results
  @meta_agent_results
end

#skills_registry ⇒ Ask::Skills::Registry? (readonly)

Returns auto-discovered skills registry.

Returns:

  • (Ask::Skills::Registry, nil) —

    auto-discovered skills registry



18
19
20
 
# File 'lib/ask/agent/session.rb', line 18

def skills_registry
  @skills_registry
end

#tool_calls_made ⇒ Object (readonly)

Returns the value of attribute tool_calls_made.



10
11
12
 
# File 'lib/ask/agent/session.rb', line 10

def tool_calls_made
  @tool_calls_made
end

#tools ⇒ Object (readonly)

Returns the value of attribute tools.



9
10
11
 
# File 'lib/ask/agent/session.rb', line 9

def tools
  @tools
end

#turn_count ⇒ Object (readonly)

Returns the value of attribute turn_count.



9
10
11
 
# File 'lib/ask/agent/session.rb', line 9

def turn_count
  @turn_count
end

Class Method Details

.load(id, adapter:) ⇒ Object 



184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
 
# File 'lib/ask/agent/session.rb', line 184

def self.load(id, adapter:)
  data = adapter.load(id)
  return nil unless data

  session = new(
    id: data[:id],
    model: data.dig(:metadata, :model),
    tools: data.dig(:metadata, :tools)&.map(&:constantize) || [],
    persistence: adapter
  )

  data[:messages].each do |msg|
    session.chat.add_message(
      role: msg[:role].to_sym,
      content: msg[:content],
      tool_call_id: msg[:tool_call_id]
    )
  end

  session
end

Instance Method Details

#abort ⇒ Object 



211
212
213
 
# File 'lib/ask/agent/session.rb', line 211

def abort
  @abort_requested = true
end

#abort_requested? ⇒ Boolean

Returns:

  • (Boolean) 


215
 
# File 'lib/ask/agent/session.rb', line 215

def abort_requested? = @abort_requested

#delete ⇒ Object 



206
207
208
209
 
# File 'lib/ask/agent/session.rb', line 206

def delete
  @deleted = true
  @persistence&.delete(@id)
end

#deleted? ⇒ Boolean

Returns:

  • (Boolean) 


178
 
# File 'lib/ask/agent/session.rb', line 178

def deleted? = @deleted

#emit(event) ⇒ Object 



171
172
173
174
175
 
# File 'lib/ask/agent/session.rb', line 171

def emit(event)
  @event_handlers[:all].each { |h| h.call(event) }
  handlers = @event_handlers[event.class]
  handlers&.each { |h| h.call(event) }
end

#on(type, &block) ⇒ Object 



165
166
167
168
169
 
# File 'lib/ask/agent/session.rb', line 165

def on(type, &block)
  @event_handlers[type] ||= []
  @event_handlers[type] << block
  self
end

#on_event(&block) ⇒ Object 



160
161
162
163
 
# File 'lib/ask/agent/session.rb', line 160

def on_event(&block)
  @event_handlers[:all] << block
  self
end

#reflection_count ⇒ Object 



12
13
14
 
# File 'lib/ask/agent/session.rb', line 12

def reflection_count
  @reflector&.reflection_count || 0
end

#reset_messages! ⇒ Object 



239
240
241
242
 
# File 'lib/ask/agent/session.rb', line 239

def reset_messages!
  @chat.reset_messages!
  @messages = []
end

#run(message, tools: nil) ⇒ Object 



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
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
 
# File 'lib/ask/agent/session.rb', line 70

def run(message, tools: nil)
  raise "Session deleted" if @deleted
  raise "Session already running" if @running

  @running = true
  @abort_requested = false
  @turn_count = 0
  @loop.reset!

  emit(Events::SessionStart.new)

  active_tools = resolve_tools(tools || [])
  active_tools = @tools if active_tools.empty?

  if active_tools.empty? && !@_no_tools_instructed
    @chat.add_message(role: :system, content: "You have no tools available. Do not claim you can look up information or use tools of any kind. Just respond based on your existing knowledge.")
    @_no_tools_instructed = true
  end

  begin
    @tool_executor.telemetry = @telemetry

    response = @loop.run_turn(
      chat: @chat,
      message: message,
      tools: active_tools,
      tool_executor: @tool_executor,
      compactor: @compactor,
      hooks: @hooks,
      event_emitter: self,
      session_id: @id
    )
  rescue MaxTurnsExceeded => e
    emit(Events::MaxTurnsExceeded.new(max_turns: @max_turns))
    @telemetry.log(:max_turns_exceeded, session_id: @id, max_turns: @max_turns)
    response = last_content
  rescue LoopDetected => e
    emit(Events::LoopDetected.new(tool_name: e.message, repeated_count: 3))
    @telemetry.log(:loop_detected, session_id: @id, tool_name: e.message, repeated_count: 3)
    response = last_content
  rescue Ask::ContextLengthExceeded
    if @compactor && !@compactor.overflow_recovered?
      @compactor.recover_from_overflow
      retry
    end
    response = "I'm sorry, the conversation has grown too long. Please start a new session."
  rescue StandardError => e
    emit(Events::Error.new(error: e.message, recoverable: true))
    raise
  ensure
    @running = false
    persist! if @persistence
  end

  @tool_calls_made = @tool_executor.total_executions

  if @reflector && @reflector.reflect?(@tool_calls_made) && !@abort_requested
    eval_result = @reflector.evaluate(response: response, event_emitter: self)
    @telemetry.log(:reflection_end, session_id: @id, decision: eval_result[:decision], feedback: eval_result[:feedback])

    if eval_result[:decision] == :improve && !@abort_requested
      @chat.add_message(
        role: :system,
        content: "Improve your last response: #{eval_result[:feedback]}"
      )

      response = @loop.run_turn(
        chat: @chat,
        message: "",
        tools: active_tools,
        tool_executor: @tool_executor,
        compactor: @compactor,
        hooks: @hooks,
        event_emitter: self,
        session_id: @id
      )
    end
  end

  if @meta_agent_config
    @telemetry.increment_session_count!
    try_auto_meta_agent
  end

  emit(Events::SessionEnd.new(result: response, turn_count: @turn_count, tool_calls_made: @tool_calls_made))
  @messages = @chat.messages.dup

  response
end

#running? ⇒ Boolean

Returns:

  • (Boolean) 


177
 
# File 'lib/ask/agent/session.rb', line 177

def running? = @running

#save ⇒ Object 



180
181
182
 
# File 'lib/ask/agent/session.rb', line 180

def save
  persist! if @persistence
end

#skill(name) ⇒ Object

Load a skill by name or file path. Injects the skill’s full instructions into the conversation as a system message.

Parameters:

  • name (String) —

    skill name (e.g. “rails.db_debug”) or path to a .md file

Raises:

  • (Ask::Skills::Error) —

    if the skill is not found



222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
 
# File 'lib/ask/agent/session.rb', line 222

def skill(name)
  if @skills_registry && (s = @skills_registry[name])
    @chat.add_message(
      role: :system,
      content: "## Skill: #{s.name}\n\n#{s.description}\n\n---\n\n#{s.instructions}"
    )
  elsif File.exist?(name.to_s)
    content = File.read(name.to_s)
    @chat.add_message(
      role: :system,
      content: "## Skill: #{name}\n\n---\n\n#{content}"
    )
  else
    raise Ask::Skills::Error, "Skill not found: #{name.inspect}"
  end
end