Add JsonSchemaRule

CHANGELOG.md

@@ -13,6 +13,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added
 - Parameter `meta: dict` on `BaseEvent`.
 - `AzureOpenAiTextToSpeechDriver`.
+- `JsonSchemaRule` for instructing the LLM to output a JSON object that conforms to a schema.
 
 ### Changed
 - **BREAKING**: Drivers, Loaders, and Engines now raise exceptions rather than returning `ErrorArtifacts`.

docs/griptape-framework/structures/rulesets.md

@@ -5,8 +5,47 @@ search:
 
 ## Overview
 
-A [Ruleset](../../reference/griptape/rules/ruleset.md) can be used to define rules for [Structures](../structures/agents.md) and [Tasks](../structures/tasks.md).
-Rulesets can be used to shape personality, format output, restrict topics, and more. 
+A [Ruleset](../../reference/griptape/rules/ruleset.md) can be used to define [Rule](../../reference/griptape/rules/base_rule.md)s for [Structures](../structures/agents.md) and [Tasks](../structures/tasks.md). Griptape places Rules into the LLM's system prompt for strong control over the output.
+
+## Types of Rules
+
+### Rule
+
+[Rule](../../reference/griptape/rules/base_rule.md)s shape the LLM's behavior by defining specific guidelines or instructions for how it should interpret and respond to inputs. Rules can be used to modify language style, tone, or even behavior based on what you define.
+
+```python
+--8<-- "docs/griptape-framework/structures/src/basic_rule.py"
+```
+
+```
+[09/10/24 14:41:52] INFO     PromptTask b7b23a88ea9e4cd0befb7e7a4ed596b0
+                             Input: Hi there! How are you?
+                    INFO     PromptTask b7b23a88ea9e4cd0befb7e7a4ed596b0
+                             Output: Ahoy, matey! I be doing just fine, thank ye fer askin'. How be the winds blowin' in yer sails today?
+```
+
+### Json Schema
+
+[JsonSchemaRule](../../reference/griptape/rules/json_schema_rule.md)s defines a structured format for the LLM's output by providing a JSON schema.
+This is particularly useful when you need the LLM to return well-formed data, such as JSON objects, with specific fields and data types.
+
+!!! warning
+  `JsonSchemaRule` may break [ToolkitTask](../structures/tasks.md#toolkittask) which relies on a specific [output token](https://github.com/griptape-ai/griptape/blob/e6a04c7b88cf9fa5d6bcf4c833ffebfab89a3258/griptape/tasks/toolkit_task.py#L28).
+
+
+```python
+--8<-- "docs/griptape-framework/structures/src/json_schema_rule.py"
+```
+
+```
+[09/10/24 14:44:53] INFO     PromptTask fb26dd41803443c0b51c3d861626e07a
+                             Input: What is the sentiment of this message?: 'I am so happy!'
+[09/10/24 14:44:54] INFO     PromptTask fb26dd41803443c0b51c3d861626e07a
+                             Output: {
+                               "answer": "The sentiment of the message is positive.",
+                               "relevant_emojis": ["😊", "😃"]
+                             }
+```
 
 ## Structure
 

docs/griptape-framework/structures/src/basic_rule.py

@@ -0,0 +1,13 @@
+from griptape.rules import Rule, Ruleset
+from griptape.structures import Agent
+
+pipeline = Agent(
+    rulesets=[
+        Ruleset(
+            name="Personality",
+            rules=[Rule("Talk like a pirate.")],
+        ),
+    ]
+)
+
+pipeline.run("Hi there! How are you?")

docs/griptape-framework/structures/src/json_schema_rule.py

@@ -0,0 +1,14 @@
+import schema
+
+from griptape.rules.json_schema_rule import JsonSchemaRule
+from griptape.structures import Agent
+
+agent = Agent(
+    rules=[
+        JsonSchemaRule(
+            schema.Schema({"answer": str, "relevant_emojis": schema.Schema(["str"])}).json_schema("Output Format")
+        )
+    ]
+)
+
+agent.run("What is the sentiment of this message?: 'I am so happy!'")

griptape/mixins/rule_mixin.py

@@ -4,7 +4,7 @@
 
 from attrs import Attribute, define, field
 
-from griptape.rules import Rule, Ruleset
+from griptape.rules import BaseRule, Ruleset
 
 if TYPE_CHECKING:
     from griptape.structures import Structure
@@ -16,7 +16,7 @@ class RuleMixin:
     ADDITIONAL_RULESET_NAME = "Additional Ruleset"
 
     rulesets: list[Ruleset] = field(factory=list, kw_only=True)
-    rules: list[Rule] = field(factory=list, kw_only=True)
+    rules: list[BaseRule] = field(factory=list, kw_only=True)
     structure: Optional[Structure] = field(default=None, kw_only=True)
 
     @rulesets.validator  # pyright: ignore[reportAttributeAccessIssue]
@@ -28,7 +28,7 @@ def validate_rulesets(self, _: Attribute, rulesets: list[Ruleset]) -> None:
             raise ValueError("Can't have both rulesets and rules specified.")
 
     @rules.validator  # pyright: ignore[reportAttributeAccessIssue]
-    def validate_rules(self, _: Attribute, rules: list[Rule]) -> None:
+    def validate_rules(self, _: Attribute, rules: list[BaseRule]) -> None:
         if not rules:
             return
 

griptape/rules/__init__.py

@@ -1,5 +1,7 @@
+from griptape.rules.base_rule import BaseRule
 from griptape.rules.rule import Rule
+from griptape.rules.json_schema_rule import JsonSchemaRule
 from griptape.rules.ruleset import Ruleset
 
 
-__all__ = ["Rule", "Ruleset"]
+__all__ = ["BaseRule", "Rule", "JsonSchemaRule", "Ruleset"]

griptape/rules/base_rule.py

@@ -0,0 +1,17 @@
+from __future__ import annotations
+
+from abc import ABC, abstractmethod
+from typing import Any
+
+from attrs import define, field
+
+
+@define(frozen=True)
+class BaseRule(ABC):
+    value: Any = field()
+
+    def __str__(self) -> str:
+        return self.to_text()
+
+    @abstractmethod
+    def to_text(self) -> str: ...

griptape/rules/json_schema_rule.py

@@ -0,0 +1,17 @@
+from __future__ import annotations
+
+import json
+
+from attrs import define, field
+
+from griptape.rules import BaseRule
+from griptape.utils import J2
+
+
+@define(frozen=True)
+class JsonSchemaRule(BaseRule):
+    value: dict = field()
+    template_generator: J2 = field(default=J2("rules/json_schema.j2"))
+
+    def to_text(self) -> str:
+        return self.template_generator.render(json_schema=json.dumps(self.value))

griptape/rules/rule.py

@@ -1,8 +1,13 @@
 from __future__ import annotations
 
-from attrs import define
+from attrs import define, field
+
+from griptape.rules import BaseRule
 
 
 @define(frozen=True)
-class Rule:
-    value: str
+class Rule(BaseRule):
+    value: str = field()
+
+    def to_text(self) -> str:
+        return self.value

griptape/rules/ruleset.py

@@ -1,14 +1,14 @@
 from __future__ import annotations
 
-from typing import TYPE_CHECKING
+from typing import TYPE_CHECKING, Sequence
 
 from attrs import define, field
 
 if TYPE_CHECKING:
-    from griptape.rules import Rule
+    from griptape.rules import BaseRule
 
 
 @define
 class Ruleset:
     name: str = field()
-    rules: list[Rule] = field()
+    rules: Sequence[BaseRule] = field()

griptape/structures/structure.py

@@ -15,15 +15,15 @@
 if TYPE_CHECKING:
     from griptape.artifacts import BaseArtifact
     from griptape.memory.structure import BaseConversationMemory
-    from griptape.rules import Rule, Ruleset
+    from griptape.rules import BaseRule, Rule, Ruleset
     from griptape.tasks import BaseTask
 
 
 @define
 class Structure(ABC):
     id: str = field(default=Factory(lambda: uuid.uuid4().hex), kw_only=True)
     rulesets: list[Ruleset] = field(factory=list, kw_only=True)
-    rules: list[Rule] = field(factory=list, kw_only=True)
+    rules: list[BaseRule] = field(factory=list, kw_only=True)
     tasks: list[BaseTask] = field(factory=list, kw_only=True)
     conversation_memory: Optional[BaseConversationMemory] = field(
         default=Factory(lambda: ConversationMemory()),

griptape/templates/rules/json_schema.j2

@@ -0,0 +1 @@
+You must respond with a JSON object that successfully validates against the following schema: {{json_schema}}

griptape/templates/rulesets/rulesets.j2

@@ -6,7 +6,7 @@ Ruleset name: {{ ruleset.name }}
 "{{ ruleset.name }}" rules:
 {% for rule in ruleset.rules %}
 Rule #{{loop.index}}
-{{ rule.value }}
+{{ rule.to_text() }}
 {% endfor %}
 
 {% endfor %}

tests/unit/rules/test_json_schema_rule.py

@@ -0,0 +1,32 @@
+import json
+
+import schema
+
+from griptape.rules import JsonSchemaRule
+
+
+class TestJsonSchemaRule:
+    def test_init(self):
+        json_schema = schema.Schema({"type": "string"}).json_schema("test")
+        rule = JsonSchemaRule(json_schema)
+        assert rule.value == {
+            "type": "object",
+            "properties": {"type": {"const": "string"}},
+            "required": ["type"],
+            "additionalProperties": False,
+            "$id": "test",
+            "$schema": "http://json-schema.org/draft-07/schema#",
+        }
+
+    def test_to_text(self):
+        json_schema = schema.Schema({"type": "string"}).json_schema("test")
+        rule = JsonSchemaRule(json_schema)
+        assert (
+            rule.to_text()
+            == f"You must respond with a JSON object that successfully validates against the following schema: {json.dumps(json_schema)}"
+        )
+
+    def test___str__(self):
+        json_schema = schema.Schema({"type": "string"}).json_schema("test")
+        rule = JsonSchemaRule(json_schema)
+        assert str(rule) == rule.to_text()

tests/unit/rules/test_rule.py

@@ -5,3 +5,11 @@ class TestRule:
     def test_init(self):
         rule = Rule("foobar")
         assert rule.value == "foobar"
+
+    def test_to_text(self):
+        rule = Rule("foobar")
+        assert rule.to_text() == "foobar"
+
+    def test___str__(self):
+        rule = Rule("foobar")
+        assert str(rule) == "foobar"