feat: agent goal accuracy metric (#1303)

Author: shahules786

src/ragas/metrics/_goal_accuracy.py

@@ -0,0 +1,173 @@
+from __future__ import annotations
+
+import typing as t
+from dataclasses import dataclass, field
+
+from pydantic import BaseModel, Field
+
+from ragas.dataset_schema import MultiTurnSample
+from ragas.experimental.llms.prompt import PydanticPrompt
+from ragas.metrics.base import MetricType, MetricWithLLM, MultiTurnMetric
+
+if t.TYPE_CHECKING:
+    from langchain_core.callbacks.base import Callbacks
+
+
+class WorkflowOutput(BaseModel):
+    user_goal: str = Field(
+        ..., description="The task or objective the user wants to achieve."
+    )
+    end_state: str = Field(
+        ..., description="The final outcome or result of the workflow."
+    )
+
+
+class CompareOutcomeInput(BaseModel):
+    desired_outcome: str = Field(
+        ..., description="The desired outcome or result of the workflow."
+    )
+    arrived_outcome: str = Field(
+        ..., description="The actual outcome or result of the workflow."
+    )
+
+
+class CompareOutcomeOutput(BaseModel):
+    reason: str = Field(
+        ..., description="The task or objective the user wants to achieve."
+    )
+    verdict: t.Literal["0", "1"] = Field(
+        ..., description="The final outcome or result of the workflow."
+    )
+
+
+class WorkflowInput(BaseModel):
+    workflow: str = Field(
+        ..., description="The agentic workflow comprised of Human, AI and Tools."
+    )
+
+
+class InferGoalOutcomePrompt(PydanticPrompt[WorkflowInput, WorkflowOutput]):
+    instruction = "Given an agentic workflow comprised of Human, AI and Tools, identify the user_goal (the task or objective the user wants to achieve) and the end_state (the final outcome or result of the workflow)."
+    input_model = WorkflowInput
+    output_model = WorkflowOutput
+    examples = [
+        (
+            WorkflowInput(
+                workflow="""
+            Human: Hey, book a table at the nearest best Chinese restaurant for 8:00pm
+            AI: Sure, let me find the best options for you.
+            Tools:
+                restaurant_search: {'cuisine': 'Chinese', 'time': '8:00pm'}
+            ToolOutput: Found a few options: 1. Golden Dragon, 2. Jade Palace
+            AI: I found some great options: Golden Dragon and Jade Palace. Which one would you prefer?
+            Human: Let's go with Golden Dragon.
+            AI: Great choice! I'll book a table for 8:00pm at Golden Dragon.
+            Tools:
+                restaurant_book: {'name': 'Golden Dragon', 'time': '8:00pm'}
+            ToolOutput: Table booked at Golden Dragon for 8:00pm.
+            AI: Your table at Golden Dragon is booked for 8:00pm. Enjoy your meal!
+            Human: thanks
+            """
+            ),
+            WorkflowOutput(
+                user_goal="Book a table at the nearest best Chinese restaurant for 8:00pm.",
+                end_state="A table is successfully booked at Golden Dragon (Chinese restaurant) for 8:00pm.",
+            ),
+        )
+    ]
+
+
+class CompareOutcomePrompt(PydanticPrompt[CompareOutcomeInput, CompareOutcomeOutput]):
+    instruction = "Given user goal, desired outcome and acheived outcome compare them and identify if they are the same (1) or different(0)."
+    input_model = CompareOutcomeInput
+    output_model = CompareOutcomeOutput
+    examples = [
+        (
+            CompareOutcomeInput(
+                desired_outcome="A table is successfully booked at any Chinese restaurant for 8:00pm.",
+                arrived_outcome="A table is successfully booked at Jade Palace (Chinese restaurant) for 8:00pm.",
+            ),
+            CompareOutcomeOutput(
+                reason="The arrived outcome is same as the desired outcome and aligns with the user goal.",
+                verdict="1",
+            ),
+        )
+    ]
+
+
+@dataclass
+class AgentGoalAccuracyWithReference(MetricWithLLM, MultiTurnMetric):
+    name: str = "agent_goal_accuracy"  # type: ignore
+    _required_columns: t.Dict[MetricType, t.Set[str]] = field(
+        default_factory=lambda: {
+            MetricType.MULTI_TURN: {
+                "user_input",
+                "reference",
+            }
+        }
+    )
+    workflow_prompt: PydanticPrompt = field(
+        default_factory=lambda: InferGoalOutcomePrompt()
+    )
+    compare_outcome_prompt: PydanticPrompt = field(
+        default_factory=lambda: CompareOutcomePrompt()
+    )
+    max_retries: int = 1
+
+    async def _multi_turn_ascore(
+        self,
+        sample: MultiTurnSample,
+        callbacks: Callbacks,
+    ) -> float:
+        assert self.llm is not None, "LLM is not set"
+        assert sample.reference is not None, "Reference is not set"
+
+        prompt_input = WorkflowInput(workflow=sample.pretty_repr())
+        response = await self.workflow_prompt.generate(
+            data=prompt_input, llm=self.llm, callbacks=callbacks
+        )
+        prompt_input = CompareOutcomeInput(
+            desired_outcome=sample.reference, arrived_outcome=response.end_state
+        )
+        response = await self.compare_outcome_prompt.generate(
+            data=prompt_input, llm=self.llm, callbacks=callbacks
+        )
+        return float(response.verdict)
+
+
+@dataclass
+class AgentGoalAccuracyWithoutReference(MetricWithLLM, MultiTurnMetric):
+    name: str = "agent_goal_accuracy"  # type: ignore
+    _required_columns: t.Dict[MetricType, t.Set[str]] = field(
+        default_factory=lambda: {
+            MetricType.MULTI_TURN: {
+                "user_input",
+            }
+        }
+    )
+    workflow_prompt: PydanticPrompt = field(
+        default_factory=lambda: InferGoalOutcomePrompt()
+    )
+    compare_outcome_prompt: PydanticPrompt = field(
+        default_factory=lambda: CompareOutcomePrompt()
+    )
+    max_retries: int = 1
+
+    async def _multi_turn_ascore(
+        self,
+        sample: MultiTurnSample,
+        callbacks: Callbacks,
+    ) -> float:
+        assert self.llm is not None, "LLM is not set"
+
+        prompt_input = WorkflowInput(workflow=sample.pretty_repr())
+        response = await self.workflow_prompt.generate(
+            data=prompt_input, llm=self.llm, callbacks=callbacks
+        )
+        prompt_input = CompareOutcomeInput(
+            desired_outcome=response.user_goal, arrived_outcome=response.end_state
+        )
+        response = await self.compare_outcome_prompt.generate(
+            data=prompt_input, llm=self.llm, callbacks=callbacks
+        )
+        return float(response.verdict)