Class: LittleGhost::ModelOperations

Inherits:
Object
  • Object
show all
Defined in:
lib/little_ghost/model_operations.rb

Overview

Executes bounded model operations without creating an Agent or Run.

Constant Summary collapse

MAX_STRUCTURED_RESULT_BYTES =

:nodoc:

1_000_000
MAX_STRUCTURED_RESULT_DEPTH = 
64
MAX_STRUCTURED_RESULT_NODES = 
100_000
MAX_STRUCTURED_RESULT_REPAIR_ATTEMPTS = 
3

Instance Method Summary collapse

Constructor Details

#initialize(model_resolver:, framework_prompts: FrameworkPrompts.new) ⇒ ModelOperations

Returns a new instance of ModelOperations.



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# File 'lib/little_ghost/model_operations.rb', line 13

def initialize(model_resolver:, framework_prompts: FrameworkPrompts.new)
  @model_resolver = model_resolver
  @framework_prompts = framework_prompts
end

Instance Method Details

#embed(model:, inputs:, settings: {}, limits: {}, cancellation_token: Support::CancellationToken.new, deadline: nil) ⇒ Object 



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# File 'lib/little_ghost/model_operations.rb', line 78

def embed(model:, inputs:, settings: {}, limits: {}, cancellation_token: Support::CancellationToken.new, deadline: nil)
  request = Embeddings::Request.new(inputs:, settings:, limits:, cancellation_token:, deadline:)
  resolved = @model_resolver.resolve(model)
  handle = Instrumentation.start(:embedding, model_provider: resolved.target.provider, model_id: resolved.model_id, model_role: resolved.role, input_count: request.inputs.length)
  response = resolved.embed(request)
  metadata = response.metadata.merge(provider: resolved.target.provider, model: resolved.model_id, model_role: resolved.role, input_count: request.inputs.length).compact
  result = Embeddings::Response.new(vectors: response.vectors, usage: response.usage, metadata:)
  handle.finish(outcome: :success, dimensions: result.dimensions, **usage_attributes(result.usage))
  result
rescue => error
  handle&.finish(outcome: :error, error_type: error.class.name) if handle&.active?
  raise
end

#generate(model:, messages:, result_schema: nil, settings: {}, structured_result_repair_attempts: 1, template_paths: [], cancellation_token: Support::CancellationToken.new, deadline: nil) ⇒ Object 



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# File 'lib/little_ghost/model_operations.rb', line 18

def generate(model:, messages:, result_schema: nil, settings: {}, structured_result_repair_attempts: 1,
  template_paths: [], cancellation_token: Support::CancellationToken.new, deadline: nil)
  invocation_paths = normalize_template_paths(template_paths)
  resolved = @model_resolver.resolve(model)
  schema = normalize_schema(result_schema)
  repair_attempts = normalize_repair_attempts(structured_result_repair_attempts) if schema
  strategy = StructuredOutput.resolve(schema, model: resolved, ordinary_tools: []) if schema
  handle = Instrumentation.start(:generation, model_provider: resolved.target.provider, model_id: resolved.model_id, model_role: resolved.role, structured: !schema.nil?)
  usage = Usage.new
  conversation = messages.map { |message| Message.coerce(message) }
  response = complete(resolved, messages: conversation, settings:, schema:, strategy:, repair: false,
    invocation_paths:, cancellation_token:, deadline:)
  usage += response.usage
  output, errors = schema ? parse_structured_response(
    response.message,
    schema,
    strategy,
    invocation_paths:
  ) : [response.message.text, []]
  conversation << (schema ? redact_structured_response(
    response.message,
    schema,
    strategy,
    invocation_paths:
  ) : response.message)
  repairs_remaining = repair_attempts
  while schema && !errors.empty? && repairs_remaining.positive?
    conversation << structured_repair_message(
      response.message, strategy, errors:, repairs_remaining:, invocation_paths:
    )
    response = complete(resolved, messages: conversation, settings:, schema:, strategy:, repair: true,
      invocation_paths:, cancellation_token:, deadline:)
    usage += response.usage
    output, errors = parse_structured_response(response.message, schema, strategy, invocation_paths:)
    conversation << redact_structured_response(response.message, schema, strategy, invocation_paths:)
    repairs_remaining -= 1
  end
  unless errors.empty?
    raise StructuredResultError.new(
      "The model did not return a valid structured result after its repair attempts",
      schema_name: schema.fetch(:name), validation_errors: errors
    )
  end
  handle.finish(outcome: :success, **usage_attributes(usage))
  structured_result = StructuredResult.new(schema_name: schema.fetch(:name), value: output) if schema
  final_message = schema ? conversation.last : response.message
  RunResult.new(
    message: final_message,
    stop_reason: schema ? :structured_result : response.stop_reason,
    usage:,
    messages: conversation.freeze,
    state: DataMap.new,
    structured_result:,
    steps: []
  )
rescue => error
  handle&.finish(outcome: :error, error_type: error.class.name) if handle&.active?
  raise
end