Class: Mneme::Tools::SaveSnapshot

Inherits:
Tools::Base show all
Defined in:
lib/mneme/tools/save_snapshot.rb

Overview

Saves a summary snapshot of conversation context that is about to leave the viewport. The snapshot captures the “gist” of what happened so the agent retains awareness of past context.

The text field has a max_tokens limit for predictable sizing — each snapshot is a fixed-size tile, enabling calculation of how many fit at each compression level.

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Tools::Base

schema, truncation_threshold

Constructor Details

#initialize(main_session:, from_message_id:, to_message_id:, level: 1) ⇒ SaveSnapshot

Returns a new instance of SaveSnapshot.

Parameters:

  • main_session (Session) —

    the session being observed

  • from_message_id (Integer) —

    first message ID covered by this snapshot

  • to_message_id (Integer) —

    last message ID covered by this snapshot

  • level (Integer) (defaults to: 1) —

    compression level (1 = from messages, 2 = from L1 snapshots)



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# File 'lib/mneme/tools/save_snapshot.rb', line 34

def initialize(main_session:, from_message_id:, to_message_id:, level: 1, **)
  @main_session = main_session
  @from_message_id = from_message_id
  @to_message_id = to_message_id
  @level = level
end

Class Method Details

.description ⇒ Object 



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# File 'lib/mneme/tools/save_snapshot.rb', line 15

def self.description = "Summarize what's leaving the viewport."

.input_schema ⇒ Object 



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# File 'lib/mneme/tools/save_snapshot.rb', line 17

def self.input_schema
  {
    type: "object",
    properties: {
      text: {
        type: "string",
        maxLength: Anima::Settings.mneme_max_tokens * Message::BYTES_PER_TOKEN
      }
    },
    required: %w[text]
  }
end

.tool_name ⇒ Object 



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# File 'lib/mneme/tools/save_snapshot.rb', line 13

def self.tool_name = "save_snapshot"

Instance Method Details

#execute(input) ⇒ Object 



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# File 'lib/mneme/tools/save_snapshot.rb', line 41

def execute(input)
  text = input["text"].to_s.strip
  return "Error: Summary text cannot be blank" if text.empty?

  snapshot = @main_session.snapshots.create!(
    text: text,
    from_message_id: @from_message_id,
    to_message_id: @to_message_id,
    level: @level,
    token_count: estimate_tokens(text)
  )

  "Snapshot saved (id: #{snapshot.id}, messages #{@from_message_id}..#{@to_message_id})"
end