Merge branch 'main' into bugfix/utc-in-python-3_10

- Modify `Agent` class to add `set_knowledge` method
- Allow setting embedder from crew-level configuration
- Remove `_set_knowledge` method from initialization
- Update `Crew` class to set agent knowledge during agent setup
- Add default implementation in `BaseAgent` for compatibility

.gitignore

@@ -21,4 +21,5 @@ crew_tasks_output.json
 .mypy_cache
 .ruff_cache
 .venv
-agentops.log
+agentops.log
+test_flow.html

docs/concepts/memory.mdx

@@ -506,7 +506,7 @@ my_crew = Crew(
 )
 ```
 
-### Resetting Memory
+### Resetting Memory via cli
 
 ```shell
 crewai reset-memories [OPTIONS]
@@ -520,8 +520,46 @@ crewai reset-memories [OPTIONS]
 | `-s`, `--short`    | Reset SHORT TERM memory.         | Flag (boolean) | False   |
 | `-e`, `--entities` | Reset ENTITIES memory.           | Flag (boolean) | False   |
 | `-k`, `--kickoff-outputs` | Reset LATEST KICKOFF TASK OUTPUTS. | Flag (boolean) | False   |
+| `-kn`, `--knowledge` | Reset KNOWLEDEGE storage | Flag (boolean) | False   |
 | `-a`, `--all`      | Reset ALL memories.              | Flag (boolean) | False   |
 
+Note: To use the cli command you need to have your crew in a file called crew.py in the same directory.
+
+
+
+
+### Resetting Memory via crew object
+
+```python
+
+my_crew = Crew(
+    agents=[...],
+    tasks=[...],
+    process=Process.sequential,
+    memory=True,
+    verbose=True,
+    embedder={
+        "provider": "custom",
+        "config": {
+            "embedder": CustomEmbedder()
+        }
+    }
+)
+
+my_crew.reset_memories(command_type = 'all') # Resets all the memory
+```
+
+#### Resetting Memory Options
+
+| Command Type       | Description                      |
+| :----------------- | :------------------------------- |
+| `long`             | Reset LONG TERM memory.          | 
+| `short`            | Reset SHORT TERM memory.         | 
+| `entities`         | Reset ENTITIES memory.           | 
+| `kickoff_outputs`  | Reset LATEST KICKOFF TASK OUTPUTS. |
+| `knowledge`        | Reset KNOWLEDGE memory.          |
+| `all`              | Reset ALL memories.              |
+
 
 ## Benefits of Using CrewAI's Memory System
 

docs/how-to/kickoff-async.mdx

@@ -54,7 +54,8 @@ coding_agent = Agent(
 # Create a task that requires code execution
 data_analysis_task = Task(
     description="Analyze the given dataset and calculate the average age of participants. Ages: {ages}",
-    agent=coding_agent
+    agent=coding_agent,
+    expected_output="The average age of the participants."
 )
 
 # Create a crew and add the task
@@ -116,4 +117,4 @@ async def async_multiple_crews():
 
 # Run the async function
 asyncio.run(async_multiple_crews())
-```
+```

docs/how-to/langfuse-observability.mdx

@@ -10,6 +10,8 @@ This notebook demonstrates how to integrate **Langfuse** with **CrewAI** using O
 
 > **What is Langfuse?** [Langfuse](https://langfuse.com) is an open-source LLM engineering platform. It provides tracing and monitoring capabilities for LLM applications, helping developers debug, analyze, and optimize their AI systems. Langfuse integrates with various tools and frameworks via native integrations, OpenTelemetry, and APIs/SDKs.
 
+[![Langfuse Overview Video](https://github.com/user-attachments/assets/3926b288-ff61-4b95-8aa1-45d041c70866)](https://langfuse.com/watch-demo)
+
 ## Get Started
 
 We'll walk through a simple example of using CrewAI and integrating it with Langfuse via OpenTelemetry using OpenLit.

src/crewai/agent.py

@@ -114,7 +114,6 @@ class Agent(BaseAgent):
 
     @model_validator(mode="after")
     def post_init_setup(self):
-        self._set_knowledge()
         self.agent_ops_agent_name = self.role
 
         self.llm = create_llm(self.llm)
@@ -134,8 +133,11 @@ class Agent(BaseAgent):
             self.cache_handler = CacheHandler()
         self.set_cache_handler(self.cache_handler)
 
-    def _set_knowledge(self):
+    def set_knowledge(self, crew_embedder: Optional[Dict[str, Any]] = None):
         try:
+            if self.embedder is None and crew_embedder:
+                self.embedder = crew_embedder
+
             if self.knowledge_sources:
                 full_pattern = re.compile(r"[^a-zA-Z0-9\-_\r\n]|(\.\.)")
                 knowledge_agent_name = f"{re.sub(full_pattern, '_', self.role)}"

src/crewai/agents/agent_builder/base_agent.py

@@ -351,3 +351,6 @@ class BaseAgent(ABC, BaseModel):
         if not self._rpm_controller:
             self._rpm_controller = rpm_controller
             self.create_agent_executor()
+
+    def set_knowledge(self, crew_embedder: Optional[Dict[str, Any]] = None):
+        pass

src/crewai/cli/constants.py

@@ -216,10 +216,43 @@ MODELS = {
         "watsonx/ibm/granite-3-8b-instruct",
     ],
     "bedrock": [
+        "bedrock/us.amazon.nova-pro-v1:0",
+        "bedrock/us.amazon.nova-micro-v1:0",
+        "bedrock/us.amazon.nova-lite-v1:0",
+        "bedrock/us.anthropic.claude-3-5-sonnet-20240620-v1:0",
+        "bedrock/us.anthropic.claude-3-5-haiku-20241022-v1:0",
+        "bedrock/us.anthropic.claude-3-5-sonnet-20241022-v2:0",
+        "bedrock/us.anthropic.claude-3-7-sonnet-20250219-v1:0",
+        "bedrock/us.anthropic.claude-3-sonnet-20240229-v1:0",
+        "bedrock/us.anthropic.claude-3-opus-20240229-v1:0",
+        "bedrock/us.anthropic.claude-3-haiku-20240307-v1:0",
+        "bedrock/us.meta.llama3-2-11b-instruct-v1:0",
+        "bedrock/us.meta.llama3-2-3b-instruct-v1:0",
+        "bedrock/us.meta.llama3-2-90b-instruct-v1:0",
+        "bedrock/us.meta.llama3-2-1b-instruct-v1:0",
+        "bedrock/us.meta.llama3-1-8b-instruct-v1:0",
+        "bedrock/us.meta.llama3-1-70b-instruct-v1:0",
+        "bedrock/us.meta.llama3-3-70b-instruct-v1:0",
+        "bedrock/us.meta.llama3-1-405b-instruct-v1:0",
+        "bedrock/eu.anthropic.claude-3-5-sonnet-20240620-v1:0",
+        "bedrock/eu.anthropic.claude-3-sonnet-20240229-v1:0",
+        "bedrock/eu.anthropic.claude-3-haiku-20240307-v1:0",
+        "bedrock/eu.meta.llama3-2-3b-instruct-v1:0",
+        "bedrock/eu.meta.llama3-2-1b-instruct-v1:0",
+        "bedrock/apac.anthropic.claude-3-5-sonnet-20240620-v1:0",
+        "bedrock/apac.anthropic.claude-3-5-sonnet-20241022-v2:0",
+        "bedrock/apac.anthropic.claude-3-sonnet-20240229-v1:0",
+        "bedrock/apac.anthropic.claude-3-haiku-20240307-v1:0",
+        "bedrock/amazon.nova-pro-v1:0",
+        "bedrock/amazon.nova-micro-v1:0",
+        "bedrock/amazon.nova-lite-v1:0",
         "bedrock/anthropic.claude-3-5-sonnet-20240620-v1:0",
+        "bedrock/anthropic.claude-3-5-haiku-20241022-v1:0",
+        "bedrock/anthropic.claude-3-5-sonnet-20241022-v2:0",
+        "bedrock/anthropic.claude-3-7-sonnet-20250219-v1:0",
         "bedrock/anthropic.claude-3-sonnet-20240229-v1:0",
-        "bedrock/anthropic.claude-3-haiku-20240307-v1:0",
         "bedrock/anthropic.claude-3-opus-20240229-v1:0",
+        "bedrock/anthropic.claude-3-haiku-20240307-v1:0",
         "bedrock/anthropic.claude-v2:1",
         "bedrock/anthropic.claude-v2",
         "bedrock/anthropic.claude-instant-v1",
@@ -234,8 +267,6 @@ MODELS = {
         "bedrock/ai21.j2-mid-v1",
         "bedrock/ai21.j2-ultra-v1",
         "bedrock/ai21.jamba-instruct-v1:0",
-        "bedrock/meta.llama2-13b-chat-v1",
-        "bedrock/meta.llama2-70b-chat-v1",
         "bedrock/mistral.mistral-7b-instruct-v0:2",
         "bedrock/mistral.mixtral-8x7b-instruct-v0:1",
     ],

src/crewai/cli/utils.py

@@ -257,11 +257,11 @@ def get_crew(crew_path: str = "crew.py", require: bool = False) -> Crew | None:
         import os
 
         for root, _, files in os.walk("."):
-            if "crew.py" in files:
-                crew_path = os.path.join(root, "crew.py")
+            if crew_path in files:
+                crew_os_path = os.path.join(root, crew_path)
                 try:
                     spec = importlib.util.spec_from_file_location(
-                        "crew_module", crew_path
+                        "crew_module", crew_os_path
                     )
                     if not spec or not spec.loader:
                         continue
@@ -273,9 +273,11 @@ def get_crew(crew_path: str = "crew.py", require: bool = False) -> Crew | None:
                         for attr_name in dir(module):
                             attr = getattr(module, attr_name)
                             try:
-                                if callable(attr) and hasattr(attr, "crew"):
-                                    crew_instance = attr().crew()
-                                    return crew_instance
+                                if isinstance(attr, Crew) and hasattr(attr, "kickoff"):
+                                    print(
+                                        f"Found valid crew object in attribute '{attr_name}' at {crew_os_path}."
+                                    )
+                                    return attr
 
                             except Exception as e:
                                 print(f"Error processing attribute {attr_name}: {e}")

src/crewai/crew.py

@@ -35,10 +35,8 @@ from crewai.process import Process
 from crewai.task import Task
 from crewai.tasks.conditional_task import ConditionalTask
 from crewai.tasks.task_output import TaskOutput
-from crewai.telemetry import Telemetry
 from crewai.tools.agent_tools.agent_tools import AgentTools
 from crewai.tools.base_tool import Tool
-from crewai.traces.unified_trace_controller import init_crew_main_trace
 from crewai.types.usage_metrics import UsageMetrics
 from crewai.utilities import I18N, FileHandler, Logger, RPMController
 from crewai.utilities.constants import TRAINING_DATA_FILE
@@ -258,8 +256,6 @@ class Crew(BaseModel):
         if self.function_calling_llm and not isinstance(self.function_calling_llm, LLM):
             self.function_calling_llm = create_llm(self.function_calling_llm)
 
-        self._telemetry = Telemetry()
-        self._telemetry.set_tracer()
         return self
 
     @model_validator(mode="after")
@@ -574,7 +570,6 @@ class Crew(BaseModel):
             CrewTrainingHandler(filename).clear()
             raise
 
-    @init_crew_main_trace
     def kickoff(
         self,
         inputs: Optional[Dict[str, Any]] = None,
@@ -605,6 +600,7 @@ class Crew(BaseModel):
                 agent.i18n = i18n
                 # type: ignore[attr-defined] # Argument 1 to "_interpolate_inputs" of "Crew" has incompatible type "dict[str, Any] | None"; expected "dict[str, Any]"
                 agent.crew = self  # type: ignore[attr-defined]
+                agent.set_knowledge(crew_embedder=self.embedder)
                 # TODO: Create an AgentFunctionCalling protocol for future refactoring
                 if not agent.function_calling_llm:  # type: ignore # "BaseAgent" has no attribute "function_calling_llm"
                     agent.function_calling_llm = self.function_calling_llm  # type: ignore # "BaseAgent" has no attribute "function_calling_llm"
@@ -1115,7 +1111,6 @@ class Crew(BaseModel):
             "_short_term_memory",
             "_long_term_memory",
             "_entity_memory",
-            "_telemetry",
             "agents",
             "tasks",
             "knowledge_sources",
@@ -1278,11 +1273,11 @@ class Crew(BaseModel):
     def _reset_all_memories(self) -> None:
         """Reset all available memory systems."""
         memory_systems = [
-            ("short term", self._short_term_memory),
-            ("entity", self._entity_memory),
-            ("long term", self._long_term_memory),
-            ("task output", self._task_output_handler),
-            ("knowledge", self.knowledge),
+            ("short term", getattr(self, "_short_term_memory", None)),
+            ("entity", getattr(self, "_entity_memory", None)),
+            ("long term", getattr(self, "_long_term_memory", None)),
+            ("task output", getattr(self, "_task_output_handler", None)),
+            ("knowledge", getattr(self, "knowledge", None)),
         ]
 
         for name, system in memory_systems:

src/crewai/flow/flow.py

@@ -22,10 +22,6 @@ from pydantic import BaseModel, Field, ValidationError
 from crewai.flow.flow_visualizer import plot_flow
 from crewai.flow.persistence.base import FlowPersistence
 from crewai.flow.utils import get_possible_return_constants
-from crewai.traces.unified_trace_controller import (
-    init_flow_main_trace,
-    trace_flow_step,
-)
 from crewai.utilities.events.crewai_event_bus import crewai_event_bus
 from crewai.utilities.events.flow_events import (
     FlowCreatedEvent,
@@ -713,16 +709,34 @@ class Flow(Generic[T], metaclass=FlowMeta):
             raise TypeError(f"State must be dict or BaseModel, got {type(self._state)}")
 
     def kickoff(self, inputs: Optional[Dict[str, Any]] = None) -> Any:
-        """Start the flow execution.
+        """
+        Start the flow execution in a synchronous context.
+
+        This method wraps kickoff_async so that all state initialization and event
+        emission is handled in the asynchronous method.
+        """
+
+        async def run_flow():
+            return await self.kickoff_async(inputs)
+
+        return asyncio.run(run_flow())
+
+    async def kickoff_async(self, inputs: Optional[Dict[str, Any]] = None) -> Any:
+        """
+        Start the flow execution asynchronously.
+
+        This method performs state restoration (if an 'id' is provided and persistence is available)
+        and updates the flow state with any additional inputs. It then emits the FlowStartedEvent,
+        logs the flow startup, and executes all start methods. Once completed, it emits the
+        FlowFinishedEvent and returns the final output.
 
         Args:
-            inputs: Optional dictionary containing input values and potentially a state ID to restore
-        """
-        # Handle state restoration if ID is provided in inputs
-        if inputs and "id" in inputs and self._persistence is not None:
-            restore_uuid = inputs["id"]
-            stored_state = self._persistence.load_state(restore_uuid)
+            inputs: Optional dictionary containing input values and/or a state ID for restoration.
 
+        Returns:
+            The final output from the flow, which is the result of the last executed method.
+        """
+        if inputs:
             # Override the id in the state if it exists in inputs
             if "id" in inputs:
                 if isinstance(self._state, dict):
@@ -730,24 +744,27 @@ class Flow(Generic[T], metaclass=FlowMeta):
                 elif isinstance(self._state, BaseModel):
                     setattr(self._state, "id", inputs["id"])
 
-            if stored_state:
-                self._log_flow_event(
-                    f"Loading flow state from memory for UUID: {restore_uuid}",
-                    color="yellow",
-                )
-                # Restore the state
-                self._restore_state(stored_state)
-            else:
-                self._log_flow_event(
-                    f"No flow state found for UUID: {restore_uuid}", color="red"
-                )
+            # If persistence is enabled, attempt to restore the stored state using the provided id.
+            if "id" in inputs and self._persistence is not None:
+                restore_uuid = inputs["id"]
+                stored_state = self._persistence.load_state(restore_uuid)
+                if stored_state:
+                    self._log_flow_event(
+                        f"Loading flow state from memory for UUID: {restore_uuid}",
+                        color="yellow",
+                    )
+                    self._restore_state(stored_state)
+                else:
+                    self._log_flow_event(
+                        f"No flow state found for UUID: {restore_uuid}", color="red"
+                    )
 
-            # Apply any additional inputs after restoration
+            # Update state with any additional inputs (ignoring the 'id' key)
             filtered_inputs = {k: v for k, v in inputs.items() if k != "id"}
             if filtered_inputs:
                 self._initialize_state(filtered_inputs)
 
-        # Start flow execution
+        # Emit FlowStartedEvent and log the start of the flow.
         crewai_event_bus.emit(
             self,
             FlowStartedEvent(
@@ -763,16 +780,6 @@ class Flow(Generic[T], metaclass=FlowMeta):
         if inputs is not None and "id" not in inputs:
             self._initialize_state(inputs)
 
-        async def run_flow():
-            return await self.kickoff_async()
-
-        return asyncio.run(run_flow())
-
-    @init_flow_main_trace
-    async def kickoff_async(self, inputs: Optional[Dict[str, Any]] = None) -> Any:
-        if not self._start_methods:
-            raise ValueError("No start method defined")
-
         tasks = [
             self._execute_start_method(start_method)
             for start_method in self._start_methods
@@ -789,6 +796,7 @@ class Flow(Generic[T], metaclass=FlowMeta):
                 result=final_output,
             ),
         )
+
         return final_output
 
     async def _execute_start_method(self, start_method_name: str) -> None:
@@ -814,7 +822,6 @@ class Flow(Generic[T], metaclass=FlowMeta):
         )
         await self._execute_listeners(start_method_name, result)
 
-    @trace_flow_step
     async def _execute_method(
         self, method_name: str, method: Callable, *args: Any, **kwargs: Any
     ) -> Any:

src/crewai/flow/persistence/sqlite.py

@@ -4,7 +4,7 @@ SQLite-based implementation of flow state persistence.
 
 import json
 import sqlite3
-from datetime import datetime
+from datetime import datetime, timezone
 from pathlib import Path
 from typing import Any, Dict, Optional, Union
 
@@ -34,6 +34,7 @@ class SQLiteFlowPersistence(FlowPersistence):
             ValueError: If db_path is invalid
         """
         from crewai.utilities.paths import db_storage_path
+
         # Get path from argument or default location
         path = db_path or str(Path(db_storage_path()) / "flow_states.db")
 
@@ -46,7 +47,8 @@ class SQLiteFlowPersistence(FlowPersistence):
     def init_db(self) -> None:
         """Create the necessary tables if they don't exist."""
         with sqlite3.connect(self.db_path) as conn:
-            conn.execute("""
+            conn.execute(
+                """
             CREATE TABLE IF NOT EXISTS flow_states (
                 id INTEGER PRIMARY KEY AUTOINCREMENT,
                 flow_uuid TEXT NOT NULL,
@@ -54,12 +56,15 @@ class SQLiteFlowPersistence(FlowPersistence):
                 timestamp DATETIME NOT NULL,
                 state_json TEXT NOT NULL
             )
-            """)
+            """
+            )
             # Add index for faster UUID lookups
-            conn.execute("""
+            conn.execute(
+                """
             CREATE INDEX IF NOT EXISTS idx_flow_states_uuid
             ON flow_states(flow_uuid)
-            """)
+            """
+            )
 
     def save_state(
         self,
@@ -85,19 +90,22 @@ class SQLiteFlowPersistence(FlowPersistence):
             )
 
         with sqlite3.connect(self.db_path) as conn:
-            conn.execute("""
+            conn.execute(
+                """
             INSERT INTO flow_states (
                 flow_uuid,
                 method_name,
                 timestamp,
                 state_json
             ) VALUES (?, ?, ?, ?)
-            """, (
-                flow_uuid,
-                method_name,
-                datetime.utcnow().isoformat(),
-                json.dumps(state_dict),
-            ))
+            """,
+                (
+                    flow_uuid,
+                    method_name,
+                    datetime.now(timezone.utc).isoformat(),
+                    json.dumps(state_dict),
+                ),
+            )
 
     def load_state(self, flow_uuid: str) -> Optional[Dict[str, Any]]:
         """Load the most recent state for a given flow UUID.
@@ -109,13 +117,16 @@ class SQLiteFlowPersistence(FlowPersistence):
             The most recent state as a dictionary, or None if no state exists
         """
         with sqlite3.connect(self.db_path) as conn:
-            cursor = conn.execute("""
+            cursor = conn.execute(
+                """
             SELECT state_json
             FROM flow_states
             WHERE flow_uuid = ?
             ORDER BY id DESC
             LIMIT 1
-            """, (flow_uuid,))
+            """,
+                (flow_uuid,),
+            )
             row = cursor.fetchone()
 
         if row:

src/crewai/flow/utils.py

@@ -16,7 +16,8 @@ Example
 import ast
 import inspect
 import textwrap
-from typing import Any, Dict, List, Optional, Set, Union
+from collections import defaultdict, deque
+from typing import Any, Deque, Dict, List, Optional, Set, Union
 
 
 def get_possible_return_constants(function: Any) -> Optional[List[str]]:
@@ -118,7 +119,7 @@ def calculate_node_levels(flow: Any) -> Dict[str, int]:
     - Processes router paths separately
     """
     levels: Dict[str, int] = {}
-    queue: List[str] = []
+    queue: Deque[str] = deque()
     visited: Set[str] = set()
     pending_and_listeners: Dict[str, Set[str]] = {}
 
@@ -128,28 +129,35 @@ def calculate_node_levels(flow: Any) -> Dict[str, int]:
             levels[method_name] = 0
             queue.append(method_name)
 
+    # Precompute listener dependencies
+    or_listeners = defaultdict(list)
+    and_listeners = defaultdict(set)
+    for listener_name, (condition_type, trigger_methods) in flow._listeners.items():
+        if condition_type == "OR":
+            for method in trigger_methods:
+                or_listeners[method].append(listener_name)
+        elif condition_type == "AND":
+            and_listeners[listener_name] = set(trigger_methods)
+
     # Breadth-first traversal to assign levels
     while queue:
-        current = queue.pop(0)
+        current = queue.popleft()
         current_level = levels[current]
         visited.add(current)
 
-        for listener_name, (condition_type, trigger_methods) in flow._listeners.items():
-            if condition_type == "OR":
-                if current in trigger_methods:
-                    if (
-                        listener_name not in levels
-                        or levels[listener_name] > current_level + 1
-                    ):
-                        levels[listener_name] = current_level + 1
-                        if listener_name not in visited:
-                            queue.append(listener_name)
-            elif condition_type == "AND":
+        for listener_name in or_listeners[current]:
+            if listener_name not in levels or levels[listener_name] > current_level + 1:
+                levels[listener_name] = current_level + 1
+                if listener_name not in visited:
+                    queue.append(listener_name)
+
+        for listener_name, required_methods in and_listeners.items():
+            if current in required_methods:
                 if listener_name not in pending_and_listeners:
                     pending_and_listeners[listener_name] = set()
-                if current in trigger_methods:
-                    pending_and_listeners[listener_name].add(current)
-                if set(trigger_methods) == pending_and_listeners[listener_name]:
+                pending_and_listeners[listener_name].add(current)
+
+                if required_methods == pending_and_listeners[listener_name]:
                     if (
                         listener_name not in levels
                         or levels[listener_name] > current_level + 1
@@ -159,22 +167,7 @@ def calculate_node_levels(flow: Any) -> Dict[str, int]:
                             queue.append(listener_name)
 
         # Handle router connections
-        if current in flow._routers:
-            router_method_name = current
-            paths = flow._router_paths.get(router_method_name, [])
-            for path in paths:
-                for listener_name, (
-                    condition_type,
-                    trigger_methods,
-                ) in flow._listeners.items():
-                    if path in trigger_methods:
-                        if (
-                            listener_name not in levels
-                            or levels[listener_name] > current_level + 1
-                        ):
-                            levels[listener_name] = current_level + 1
-                            if listener_name not in visited:
-                                queue.append(listener_name)
+        process_router_paths(flow, current, current_level, levels, queue)
 
     return levels
 
@@ -227,10 +220,7 @@ def build_ancestor_dict(flow: Any) -> Dict[str, Set[str]]:
 
 
 def dfs_ancestors(
-    node: str,
-    ancestors: Dict[str, Set[str]],
-    visited: Set[str],
-    flow: Any
+    node: str, ancestors: Dict[str, Set[str]], visited: Set[str], flow: Any
 ) -> None:
     """
     Perform depth-first search to build ancestor relationships.
@@ -274,7 +264,9 @@ def dfs_ancestors(
                     dfs_ancestors(listener_name, ancestors, visited, flow)
 
 
-def is_ancestor(node: str, ancestor_candidate: str, ancestors: Dict[str, Set[str]]) -> bool:
+def is_ancestor(
+    node: str, ancestor_candidate: str, ancestors: Dict[str, Set[str]]
+) -> bool:
     """
     Check if one node is an ancestor of another.
 
@@ -339,7 +331,9 @@ def build_parent_children_dict(flow: Any) -> Dict[str, List[str]]:
     return parent_children
 
 
-def get_child_index(parent: str, child: str, parent_children: Dict[str, List[str]]) -> int:
+def get_child_index(
+    parent: str, child: str, parent_children: Dict[str, List[str]]
+) -> int:
     """
     Get the index of a child node in its parent's sorted children list.
 
@@ -360,3 +354,23 @@ def get_child_index(parent: str, child: str, parent_children: Dict[str, List[str
     children = parent_children.get(parent, [])
     children.sort()
     return children.index(child)
+
+
+def process_router_paths(flow, current, current_level, levels, queue):
+    """
+    Handle the router connections for the current node.
+    """
+    if current in flow._routers:
+        paths = flow._router_paths.get(current, [])
+        for path in paths:
+            for listener_name, (
+                condition_type,
+                trigger_methods,
+            ) in flow._listeners.items():
+                if path in trigger_methods:
+                    if (
+                        listener_name not in levels
+                        or levels[listener_name] > current_level + 1
+                    ):
+                        levels[listener_name] = current_level + 1
+                        queue.append(listener_name)

src/crewai/llm.py

@@ -1,4 +1,3 @@
-import inspect
 import json
 import logging
 import os
@@ -6,21 +5,17 @@ import sys
 import threading
 import warnings
 from contextlib import contextmanager
-from typing import (
-    Any,
-    Dict,
-    List,
-    Literal,
-    Optional,
-    Tuple,
-    Type,
-    Union,
-    cast,
-)
+from typing import Any, Dict, List, Literal, Optional, Type, Union, cast
 
 from dotenv import load_dotenv
 from pydantic import BaseModel
 
+from crewai.utilities.events.llm_events import (
+    LLMCallCompletedEvent,
+    LLMCallFailedEvent,
+    LLMCallStartedEvent,
+    LLMCallType,
+)
 from crewai.utilities.events.tool_usage_events import ToolExecutionErrorEvent
 
 with warnings.catch_warnings():
@@ -31,12 +26,10 @@ with warnings.catch_warnings():
     from litellm.utils import get_supported_openai_params, supports_response_schema
 
 
-from crewai.traces.unified_trace_controller import trace_llm_call
 from crewai.utilities.events import crewai_event_bus
 from crewai.utilities.exceptions.context_window_exceeding_exception import (
     LLMContextLengthExceededException,
 )
-from crewai.utilities.protocols import AgentExecutorProtocol
 
 load_dotenv()
 
@@ -71,6 +64,7 @@ LLM_CONTEXT_WINDOW_SIZES = {
     "gpt-4-turbo": 128000,
     "o1-preview": 128000,
     "o1-mini": 128000,
+    "o3-mini": 200000,  # Based on official o3-mini specifications
     # gemini
     "gemini-2.0-flash": 1048576,
     "gemini-1.5-pro": 2097152,
@@ -180,7 +174,6 @@ class LLM:
         self.context_window_size = 0
         self.reasoning_effort = reasoning_effort
         self.additional_params = kwargs
-        self._message_history: List[Dict[str, str]] = []
         self.is_anthropic = self._is_anthropic_model(model)
 
         litellm.drop_params = True
@@ -196,12 +189,6 @@ class LLM:
         self.set_callbacks(callbacks)
         self.set_env_callbacks()
 
-    @trace_llm_call
-    def _call_llm(self, params: Dict[str, Any]) -> Any:
-        with suppress_warnings():
-            response = litellm.completion(**params)
-            return response
-
     def _is_anthropic_model(self, model: str) -> bool:
         """Determine if the model is from Anthropic provider.
 
@@ -259,6 +246,15 @@ class LLM:
             >>> print(response)
             "The capital of France is Paris."
         """
+        crewai_event_bus.emit(
+            self,
+            event=LLMCallStartedEvent(
+                messages=messages,
+                tools=tools,
+                callbacks=callbacks,
+                available_functions=available_functions,
+            ),
+        )
         # Validate parameters before proceeding with the call.
         self._validate_call_params()
 
@@ -311,7 +307,7 @@ class LLM:
                 params = {k: v for k, v in params.items() if v is not None}
 
                 # --- 2) Make the completion call
-                response = self._call_llm(params)
+                response = litellm.completion(**params)
                 response_message = cast(Choices, cast(ModelResponse, response).choices)[
                     0
                 ].message
@@ -333,12 +329,13 @@ class LLM:
 
                 # --- 4) If no tool calls, return the text response
                 if not tool_calls or not available_functions:
+                    self._handle_emit_call_events(text_response, LLMCallType.LLM_CALL)
                     return text_response
 
                 # --- 5) Handle the tool call
                 tool_call = tool_calls[0]
                 function_name = tool_call.function.name
-                print("function_name", function_name)
+
                 if function_name in available_functions:
                     try:
                         function_args = json.loads(tool_call.function.arguments)
@@ -350,6 +347,7 @@ class LLM:
                     try:
                         # Call the actual tool function
                         result = fn(**function_args)
+                        self._handle_emit_call_events(result, LLMCallType.TOOL_CALL)
                         return result
 
                     except Exception as e:
@@ -365,6 +363,12 @@ class LLM:
                                 error=str(e),
                             ),
                         )
+                        crewai_event_bus.emit(
+                            self,
+                            event=LLMCallFailedEvent(
+                                error=f"Tool execution error: {str(e)}"
+                            ),
+                        )
                         return text_response
 
                 else:
@@ -374,12 +378,28 @@ class LLM:
                     return text_response
 
             except Exception as e:
+                crewai_event_bus.emit(
+                    self,
+                    event=LLMCallFailedEvent(error=str(e)),
+                )
                 if not LLMContextLengthExceededException(
                     str(e)
                 )._is_context_limit_error(str(e)):
                     logging.error(f"LiteLLM call failed: {str(e)}")
                 raise
 
+    def _handle_emit_call_events(self, response: Any, call_type: LLMCallType):
+        """Handle the events for the LLM call.
+
+        Args:
+            response (str): The response from the LLM call.
+            call_type (str): The type of call, either "tool_call" or "llm_call".
+        """
+        crewai_event_bus.emit(
+            self,
+            event=LLMCallCompletedEvent(response=response, call_type=call_type),
+        )
+
     def _format_messages_for_provider(
         self, messages: List[Dict[str, str]]
     ) -> List[Dict[str, str]]:
@@ -466,10 +486,23 @@ class LLM:
         """
         Returns the context window size, using 75% of the maximum to avoid
         cutting off messages mid-thread.
+
+        Raises:
+            ValueError: If a model's context window size is outside valid bounds (1024-2097152)
         """
         if self.context_window_size != 0:
             return self.context_window_size
 
+        MIN_CONTEXT = 1024
+        MAX_CONTEXT = 2097152  # Current max from gemini-1.5-pro
+
+        # Validate all context window sizes
+        for key, value in LLM_CONTEXT_WINDOW_SIZES.items():
+            if value < MIN_CONTEXT or value > MAX_CONTEXT:
+                raise ValueError(
+                    f"Context window for {key} must be between {MIN_CONTEXT} and {MAX_CONTEXT}"
+                )
+
         self.context_window_size = int(
             DEFAULT_CONTEXT_WINDOW_SIZE * CONTEXT_WINDOW_USAGE_RATIO
         )
@@ -531,95 +564,3 @@ class LLM:
 
                 litellm.success_callback = success_callbacks
                 litellm.failure_callback = failure_callbacks
-
-    def _get_execution_context(self) -> Tuple[Optional[Any], Optional[Any]]:
-        """Get the agent and task from the execution context.
-
-        Returns:
-            tuple: (agent, task) from any AgentExecutor context, or (None, None) if not found
-        """
-        frame = inspect.currentframe()
-        caller_frame = frame.f_back if frame else None
-        agent = None
-        task = None
-
-        # Add a maximum depth to prevent infinite loops
-        max_depth = 100  # Reasonable limit for call stack depth
-        current_depth = 0
-
-        while caller_frame and current_depth < max_depth:
-            if "self" in caller_frame.f_locals:
-                caller_self = caller_frame.f_locals["self"]
-                if isinstance(caller_self, AgentExecutorProtocol):
-                    agent = caller_self.agent
-                    task = caller_self.task
-                    break
-            caller_frame = caller_frame.f_back
-            current_depth += 1
-
-        return agent, task
-
-    def _get_new_messages(self, messages: List[Dict[str, str]]) -> List[Dict[str, str]]:
-        """Get only the new messages that haven't been processed before."""
-        if not hasattr(self, "_message_history"):
-            self._message_history = []
-
-        new_messages = []
-        for message in messages:
-            message_key = (message["role"], message["content"])
-            if message_key not in [
-                (m["role"], m["content"]) for m in self._message_history
-            ]:
-                new_messages.append(message)
-                self._message_history.append(message)
-        return new_messages
-
-    def _get_new_tool_results(self, agent) -> List[Dict]:
-        """Get only the new tool results that haven't been processed before."""
-        if not agent or not agent.tools_results:
-            return []
-
-        if not hasattr(self, "_tool_results_history"):
-            self._tool_results_history: List[Dict] = []
-
-        new_tool_results = []
-
-        for result in agent.tools_results:
-            # Process tool arguments to extract actual values
-            processed_args = {}
-            if isinstance(result["tool_args"], dict):
-                for key, value in result["tool_args"].items():
-                    if isinstance(value, dict) and "type" in value:
-                        # Skip metadata and just store the actual value
-                        continue
-                    processed_args[key] = value
-
-            # Create a clean result with processed arguments
-            clean_result = {
-                "tool_name": result["tool_name"],
-                "tool_args": processed_args,
-                "result": result["result"],
-                "content": result.get("content", ""),
-                "start_time": result.get("start_time", ""),
-            }
-
-            # Check if this exact tool execution exists in history
-            is_duplicate = False
-            for history_result in self._tool_results_history:
-                if (
-                    clean_result["tool_name"] == history_result["tool_name"]
-                    and str(clean_result["tool_args"])
-                    == str(history_result["tool_args"])
-                    and str(clean_result["result"]) == str(history_result["result"])
-                    and clean_result["content"] == history_result.get("content", "")
-                    and clean_result["start_time"]
-                    == history_result.get("start_time", "")
-                ):
-                    is_duplicate = True
-                    break
-
-            if not is_duplicate:
-                new_tool_results.append(clean_result)
-                self._tool_results_history.append(clean_result)
-
-        return new_tool_results

src/crewai/tools/tool_usage.py

@@ -2,7 +2,6 @@ import ast
 import datetime
 import json
 import time
-from datetime import UTC
 from difflib import SequenceMatcher
 from json import JSONDecodeError
 from textwrap import dedent
@@ -118,10 +117,7 @@ class ToolUsage:
                 self._printer.print(content=f"\n\n{error}\n", color="red")
             return error
 
-        if (
-            isinstance(tool, CrewStructuredTool)
-            and tool.name == self._i18n.tools("add_image")["name"]  # type: ignore
-        ):
+        if isinstance(tool, CrewStructuredTool) and tool.name == self._i18n.tools("add_image")["name"]:  # type: ignore
             try:
                 result = self._use(tool_string=tool_string, tool=tool, calling=calling)
                 return result
@@ -158,7 +154,6 @@ class ToolUsage:
                 self.task.increment_tools_errors()
 
         started_at = time.time()
-        started_at_trace = datetime.datetime.now(UTC)
         from_cache = False
 
         result = None  # type: ignore # Incompatible types in assignment (expression has type "None", variable has type "str")
@@ -186,9 +181,7 @@ class ToolUsage:
 
                 if calling.arguments:
                     try:
-                        acceptable_args = tool.args_schema.model_json_schema()[
-                            "properties"
-                        ].keys()  # type: ignore
+                        acceptable_args = tool.args_schema.model_json_schema()["properties"].keys()  # type: ignore
                         arguments = {
                             k: v
                             for k, v in calling.arguments.items()
@@ -209,7 +202,7 @@ class ToolUsage:
                         error=e, tool=tool.name, tool_inputs=tool.description
                     )
                     error = ToolUsageErrorException(
-                        f"\n{error_message}.\nMoving on then. {self._i18n.slice('format').format(tool_names=self.tools_names)}"
+                        f'\n{error_message}.\nMoving on then. {self._i18n.slice("format").format(tool_names=self.tools_names)}'
                     ).message
                     self.task.increment_tools_errors()
                     if self.agent.verbose:
@@ -244,7 +237,6 @@ class ToolUsage:
             "result": result,
             "tool_name": tool.name,
             "tool_args": calling.arguments,
-            "start_time": started_at_trace,
         }
 
         self.on_tool_use_finished(
@@ -388,7 +380,7 @@ class ToolUsage:
                 raise
             else:
                 return ToolUsageErrorException(
-                    f"{self._i18n.errors('tool_arguments_error')}"
+                    f'{self._i18n.errors("tool_arguments_error")}'
                 )
 
         if not isinstance(arguments, dict):
@@ -396,7 +388,7 @@ class ToolUsage:
                 raise
             else:
                 return ToolUsageErrorException(
-                    f"{self._i18n.errors('tool_arguments_error')}"
+                    f'{self._i18n.errors("tool_arguments_error")}'
                 )
 
         return ToolCalling(
@@ -424,7 +416,7 @@ class ToolUsage:
                 if self.agent.verbose:
                     self._printer.print(content=f"\n\n{e}\n", color="red")
                 return ToolUsageErrorException(  # type: ignore # Incompatible return value type (got "ToolUsageErrorException", expected "ToolCalling | InstructorToolCalling")
-                    f"{self._i18n.errors('tool_usage_error').format(error=e)}\nMoving on then. {self._i18n.slice('format').format(tool_names=self.tools_names)}"
+                    f'{self._i18n.errors("tool_usage_error").format(error=e)}\nMoving on then. {self._i18n.slice("format").format(tool_names=self.tools_names)}'
                 )
             return self._tool_calling(tool_string)
 

src/crewai/traces/context.py

@@ -1,39 +0,0 @@
-from contextlib import contextmanager
-from contextvars import ContextVar
-from typing import Generator
-
-
-class TraceContext:
-    """Maintains the current trace context throughout the execution stack.
-
-    This class provides a context manager for tracking trace execution across
-    async and sync code paths using ContextVars.
-    """
-
-    _context: ContextVar = ContextVar("trace_context", default=None)
-
-    @classmethod
-    def get_current(cls):
-        """Get the current trace context.
-
-        Returns:
-            Optional[UnifiedTraceController]: The current trace controller or None if not set.
-        """
-        return cls._context.get()
-
-    @classmethod
-    @contextmanager
-    def set_current(cls, trace):
-        """Set the current trace context within a context manager.
-
-        Args:
-            trace: The trace controller to set as current.
-
-        Yields:
-            UnifiedTraceController: The current trace controller.
-        """
-        token = cls._context.set(trace)
-        try:
-            yield trace
-        finally:
-            cls._context.reset(token)

src/crewai/traces/enums.py

@@ -1,19 +0,0 @@
-from enum import Enum
-
-
-class TraceType(Enum):
-    LLM_CALL = "llm_call"
-    TOOL_CALL = "tool_call"
-    FLOW_STEP = "flow_step"
-    START_CALL = "start_call"
-
-
-class RunType(Enum):
-    KICKOFF = "kickoff"
-    TRAIN = "train"
-    TEST = "test"
-
-
-class CrewType(Enum):
-    CREW = "crew"
-    FLOW = "flow"

src/crewai/traces/models.py

@@ -1,89 +0,0 @@
-from datetime import datetime
-from typing import Any, Dict, List, Optional
-
-from pydantic import BaseModel, Field
-
-
-class ToolCall(BaseModel):
-    """Model representing a tool call during execution"""
-
-    name: str
-    arguments: Dict[str, Any]
-    output: str
-    start_time: datetime
-    end_time: Optional[datetime] = None
-    latency_ms: Optional[int] = None
-    error: Optional[str] = None
-
-
-class LLMRequest(BaseModel):
-    """Model representing the LLM request details"""
-
-    model: str
-    messages: List[Dict[str, str]]
-    temperature: Optional[float] = None
-    max_tokens: Optional[int] = None
-    stop_sequences: Optional[List[str]] = None
-    additional_params: Dict[str, Any] = Field(default_factory=dict)
-
-
-class LLMResponse(BaseModel):
-    """Model representing the LLM response details"""
-
-    content: str
-    finish_reason: Optional[str] = None
-
-
-class FlowStepIO(BaseModel):
-    """Model representing flow step input/output details"""
-
-    function_name: str
-    inputs: Dict[str, Any] = Field(default_factory=dict)
-    outputs: Any
-    metadata: Dict[str, Any] = Field(default_factory=dict)
-
-
-class CrewTrace(BaseModel):
-    """Model for tracking detailed information about LLM interactions and Flow steps"""
-
-    deployment_instance_id: Optional[str] = Field(
-        description="ID of the deployment instance"
-    )
-    trace_id: str = Field(description="Unique identifier for this trace")
-    run_id: str = Field(description="Identifier for the execution run")
-    agent_role: Optional[str] = Field(description="Role of the agent")
-    task_id: Optional[str] = Field(description="ID of the current task being executed")
-    task_name: Optional[str] = Field(description="Name of the current task")
-    task_description: Optional[str] = Field(
-        description="Description of the current task"
-    )
-    trace_type: str = Field(description="Type of the trace")
-    crew_type: str = Field(description="Type of the crew")
-    run_type: str = Field(description="Type of the run")
-
-    # Timing information
-    start_time: Optional[datetime] = None
-    end_time: Optional[datetime] = None
-    latency_ms: Optional[int] = None
-
-    # Request/Response for LLM calls
-    request: Optional[LLMRequest] = None
-    response: Optional[LLMResponse] = None
-
-    # Input/Output for Flow steps
-    flow_step: Optional[FlowStepIO] = None
-
-    # Tool usage
-    tool_calls: List[ToolCall] = Field(default_factory=list)
-
-    # Metrics
-    tokens_used: Optional[int] = None
-    prompt_tokens: Optional[int] = None
-    completion_tokens: Optional[int] = None
-    cost: Optional[float] = None
-
-    # Additional metadata
-    status: str = "running"  # running, completed, error
-    error: Optional[str] = None
-    metadata: Dict[str, Any] = Field(default_factory=dict)
-    tags: List[str] = Field(default_factory=list)

src/crewai/traces/unified_trace_controller.py

@@ -1,543 +0,0 @@
-import inspect
-import os
-from datetime import UTC, datetime
-from functools import wraps
-from typing import Any, Awaitable, Callable, Dict, List, Optional
-from uuid import uuid4
-
-from crewai.traces.context import TraceContext
-from crewai.traces.enums import CrewType, RunType, TraceType
-from crewai.traces.models import (
-    CrewTrace,
-    FlowStepIO,
-    LLMRequest,
-    LLMResponse,
-    ToolCall,
-)
-
-
-class UnifiedTraceController:
-    """Controls and manages trace execution and recording.
-
-    This class handles the lifecycle of traces including creation, execution tracking,
-    and recording of results for various types of operations (LLM calls, tool calls, flow steps).
-    """
-
-    _task_traces: Dict[str, List["UnifiedTraceController"]] = {}
-
-    def __init__(
-        self,
-        trace_type: TraceType,
-        run_type: RunType,
-        crew_type: CrewType,
-        run_id: str,
-        deployment_instance_id: str = os.environ.get(
-            "CREWAI_DEPLOYMENT_INSTANCE_ID", ""
-        ),
-        parent_trace_id: Optional[str] = None,
-        agent_role: Optional[str] = "unknown",
-        task_name: Optional[str] = None,
-        task_description: Optional[str] = None,
-        task_id: Optional[str] = None,
-        flow_step: Dict[str, Any] = {},
-        tool_calls: List[ToolCall] = [],
-        **context: Any,
-    ) -> None:
-        """Initialize a new trace controller.
-
-        Args:
-            trace_type: Type of trace being recorded.
-            run_type: Type of run being executed.
-            crew_type: Type of crew executing the trace.
-            run_id: Unique identifier for the run.
-            deployment_instance_id: Optional deployment instance identifier.
-            parent_trace_id: Optional parent trace identifier for nested traces.
-            agent_role: Role of the agent executing the trace.
-            task_name: Optional name of the task being executed.
-            task_description: Optional description of the task.
-            task_id: Optional unique identifier for the task.
-            flow_step: Optional flow step information.
-            tool_calls: Optional list of tool calls made during execution.
-            **context: Additional context parameters.
-        """
-        self.trace_id = str(uuid4())
-        self.run_id = run_id
-        self.parent_trace_id = parent_trace_id
-        self.trace_type = trace_type
-        self.run_type = run_type
-        self.crew_type = crew_type
-        self.context = context
-        self.agent_role = agent_role
-        self.task_name = task_name
-        self.task_description = task_description
-        self.task_id = task_id
-        self.deployment_instance_id = deployment_instance_id
-        self.children: List[Dict[str, Any]] = []
-        self.start_time: Optional[datetime] = None
-        self.end_time: Optional[datetime] = None
-        self.error: Optional[str] = None
-        self.tool_calls = tool_calls
-        self.flow_step = flow_step
-        self.status: str = "running"
-
-        # Add trace to task's trace collection if task_id is present
-        if task_id:
-            self._add_to_task_traces()
-
-    def _add_to_task_traces(self) -> None:
-        """Add this trace to the task's trace collection."""
-        if not hasattr(UnifiedTraceController, "_task_traces"):
-            UnifiedTraceController._task_traces = {}
-
-        if self.task_id is None:
-            return
-
-        if self.task_id not in UnifiedTraceController._task_traces:
-            UnifiedTraceController._task_traces[self.task_id] = []
-
-        UnifiedTraceController._task_traces[self.task_id].append(self)
-
-    @classmethod
-    def get_task_traces(cls, task_id: str) -> List["UnifiedTraceController"]:
-        """Get all traces for a specific task.
-
-        Args:
-            task_id: The ID of the task to get traces for
-
-        Returns:
-            List of traces associated with the task
-        """
-        return cls._task_traces.get(task_id, [])
-
-    @classmethod
-    def clear_task_traces(cls, task_id: str) -> None:
-        """Clear traces for a specific task.
-
-        Args:
-            task_id: The ID of the task to clear traces for
-        """
-        if hasattr(cls, "_task_traces") and task_id in cls._task_traces:
-            del cls._task_traces[task_id]
-
-    def _get_current_trace(self) -> "UnifiedTraceController":
-        return TraceContext.get_current()
-
-    def start_trace(self) -> "UnifiedTraceController":
-        """Start the trace execution.
-
-        Returns:
-            UnifiedTraceController: Self for method chaining.
-        """
-        self.start_time = datetime.now(UTC)
-        return self
-
-    def end_trace(self, result: Any = None, error: Optional[str] = None) -> None:
-        """End the trace execution and record results.
-
-        Args:
-            result: Optional result from the trace execution.
-            error: Optional error message if the trace failed.
-        """
-        self.end_time = datetime.now(UTC)
-        self.status = "error" if error else "completed"
-        self.error = error
-        self._record_trace(result)
-
-    def add_child_trace(self, child_trace: Dict[str, Any]) -> None:
-        """Add a child trace to this trace's execution history.
-
-        Args:
-            child_trace: The child trace information to add.
-        """
-        self.children.append(child_trace)
-
-    def to_crew_trace(self) -> CrewTrace:
-        """Convert to CrewTrace format for storage.
-
-        Returns:
-            CrewTrace: The trace data in CrewTrace format.
-        """
-        latency_ms = None
-
-        if self.tool_calls and hasattr(self.tool_calls[0], "start_time"):
-            self.start_time = self.tool_calls[0].start_time
-
-        if self.start_time and self.end_time:
-            latency_ms = int((self.end_time - self.start_time).total_seconds() * 1000)
-
-        request = None
-        response = None
-        flow_step_obj = None
-
-        if self.trace_type in [TraceType.LLM_CALL, TraceType.TOOL_CALL]:
-            request = LLMRequest(
-                model=self.context.get("model", "unknown"),
-                messages=self.context.get("messages", []),
-                temperature=self.context.get("temperature"),
-                max_tokens=self.context.get("max_tokens"),
-                stop_sequences=self.context.get("stop_sequences"),
-            )
-            if "response" in self.context:
-                response = LLMResponse(
-                    content=self.context["response"].get("content", ""),
-                    finish_reason=self.context["response"].get("finish_reason"),
-                )
-
-        elif self.trace_type == TraceType.FLOW_STEP:
-            flow_step_obj = FlowStepIO(
-                function_name=self.flow_step.get("function_name", "unknown"),
-                inputs=self.flow_step.get("inputs", {}),
-                outputs={"result": self.context.get("response")},
-                metadata=self.flow_step.get("metadata", {}),
-            )
-
-        return CrewTrace(
-            deployment_instance_id=self.deployment_instance_id,
-            trace_id=self.trace_id,
-            task_id=self.task_id,
-            run_id=self.run_id,
-            agent_role=self.agent_role,
-            task_name=self.task_name,
-            task_description=self.task_description,
-            trace_type=self.trace_type.value,
-            crew_type=self.crew_type.value,
-            run_type=self.run_type.value,
-            start_time=self.start_time,
-            end_time=self.end_time,
-            latency_ms=latency_ms,
-            request=request,
-            response=response,
-            flow_step=flow_step_obj,
-            tool_calls=self.tool_calls,
-            tokens_used=self.context.get("tokens_used"),
-            prompt_tokens=self.context.get("prompt_tokens"),
-            completion_tokens=self.context.get("completion_tokens"),
-            status=self.status,
-            error=self.error,
-        )
-
-    def _record_trace(self, result: Any = None) -> None:
-        """Record the trace.
-
-        This method is called when a trace is completed. It ensures the trace
-        is properly recorded and associated with its task if applicable.
-
-        Args:
-            result: Optional result to include in the trace
-        """
-        if result:
-            self.context["response"] = result
-
-        # Add to task traces if this trace belongs to a task
-        if self.task_id:
-            self._add_to_task_traces()
-
-
-def should_trace() -> bool:
-    """Check if tracing is enabled via environment variable."""
-    return os.getenv("CREWAI_ENABLE_TRACING", "false").lower() == "true"
-
-
-# Crew main trace
-def init_crew_main_trace(func: Callable[..., Any]) -> Callable[..., Any]:
-    """Decorator to initialize and track the main crew execution trace.
-
-    This decorator sets up the trace context for the main crew execution,
-    handling both synchronous and asynchronous crew operations.
-
-    Args:
-        func: The crew function to be traced.
-
-    Returns:
-        Wrapped function that creates and manages the main crew trace context.
-    """
-
-    @wraps(func)
-    def wrapper(self: Any, *args: Any, **kwargs: Any) -> Any:
-        if not should_trace():
-            return func(self, *args, **kwargs)
-
-        trace = build_crew_main_trace(self)
-        with TraceContext.set_current(trace):
-            try:
-                return func(self, *args, **kwargs)
-            except Exception as e:
-                trace.end_trace(error=str(e))
-                raise
-
-    return wrapper
-
-
-def build_crew_main_trace(self: Any) -> "UnifiedTraceController":
-    """Build the main trace controller for a crew execution.
-
-    This function creates a trace controller configured for the main crew execution,
-    handling different run types (kickoff, test, train) and maintaining context.
-
-    Args:
-        self: The crew instance.
-
-    Returns:
-        UnifiedTraceController: The configured trace controller for the crew.
-    """
-    run_type = RunType.KICKOFF
-    if hasattr(self, "_test") and self._test:
-        run_type = RunType.TEST
-    elif hasattr(self, "_train") and self._train:
-        run_type = RunType.TRAIN
-
-    current_trace = TraceContext.get_current()
-
-    trace = UnifiedTraceController(
-        trace_type=TraceType.LLM_CALL,
-        run_type=run_type,
-        crew_type=current_trace.crew_type if current_trace else CrewType.CREW,
-        run_id=current_trace.run_id if current_trace else str(self.id),
-        parent_trace_id=current_trace.trace_id if current_trace else None,
-    )
-    return trace
-
-
-# Flow main trace
-def init_flow_main_trace(
-    func: Callable[..., Awaitable[Any]],
-) -> Callable[..., Awaitable[Any]]:
-    """Decorator to initialize and track the main flow execution trace.
-
-    Args:
-        func: The async flow function to be traced.
-
-    Returns:
-        Wrapped async function that creates and manages the main flow trace context.
-    """
-
-    @wraps(func)
-    async def wrapper(self: Any, *args: Any, **kwargs: Any) -> Any:
-        if not should_trace():
-            return await func(self, *args, **kwargs)
-
-        trace = build_flow_main_trace(self, *args, **kwargs)
-        with TraceContext.set_current(trace):
-            try:
-                return await func(self, *args, **kwargs)
-            except Exception:
-                raise
-
-    return wrapper
-
-
-def build_flow_main_trace(
-    self: Any, *args: Any, **kwargs: Any
-) -> "UnifiedTraceController":
-    """Build the main trace controller for a flow execution.
-
-    Args:
-        self: The flow instance.
-        *args: Variable positional arguments.
-        **kwargs: Variable keyword arguments.
-
-    Returns:
-        UnifiedTraceController: The configured trace controller for the flow.
-    """
-    current_trace = TraceContext.get_current()
-    trace = UnifiedTraceController(
-        trace_type=TraceType.FLOW_STEP,
-        run_id=current_trace.run_id if current_trace else str(self.flow_id),
-        parent_trace_id=current_trace.trace_id if current_trace else None,
-        crew_type=CrewType.FLOW,
-        run_type=RunType.KICKOFF,
-        context={
-            "crew_name": self.__class__.__name__,
-            "inputs": kwargs.get("inputs", {}),
-            "agents": [],
-            "tasks": [],
-        },
-    )
-    return trace
-
-
-# Flow step trace
-def trace_flow_step(
-    func: Callable[..., Awaitable[Any]],
-) -> Callable[..., Awaitable[Any]]:
-    """Decorator to trace individual flow step executions.
-
-    Args:
-        func: The async flow step function to be traced.
-
-    Returns:
-        Wrapped async function that creates and manages the flow step trace context.
-    """
-
-    @wraps(func)
-    async def wrapper(
-        self: Any,
-        method_name: str,
-        method: Callable[..., Any],
-        *args: Any,
-        **kwargs: Any,
-    ) -> Any:
-        if not should_trace():
-            return await func(self, method_name, method, *args, **kwargs)
-
-        trace = build_flow_step_trace(self, method_name, method, *args, **kwargs)
-        with TraceContext.set_current(trace):
-            trace.start_trace()
-            try:
-                result = await func(self, method_name, method, *args, **kwargs)
-                trace.end_trace(result=result)
-                return result
-            except Exception as e:
-                trace.end_trace(error=str(e))
-                raise
-
-    return wrapper
-
-
-def build_flow_step_trace(
-    self: Any, method_name: str, method: Callable[..., Any], *args: Any, **kwargs: Any
-) -> "UnifiedTraceController":
-    """Build a trace controller for an individual flow step.
-
-    Args:
-        self: The flow instance.
-        method_name: Name of the method being executed.
-        method: The actual method being executed.
-        *args: Variable positional arguments.
-        **kwargs: Variable keyword arguments.
-
-    Returns:
-        UnifiedTraceController: The configured trace controller for the flow step.
-    """
-    current_trace = TraceContext.get_current()
-
-    # Get method signature
-    sig = inspect.signature(method)
-    params = list(sig.parameters.values())
-
-    # Create inputs dictionary mapping parameter names to values
-    method_params = [p for p in params if p.name != "self"]
-    inputs: Dict[str, Any] = {}
-
-    # Map positional args to their parameter names
-    for i, param in enumerate(method_params):
-        if i < len(args):
-            inputs[param.name] = args[i]
-
-    # Add keyword arguments
-    inputs.update(kwargs)
-
-    trace = UnifiedTraceController(
-        trace_type=TraceType.FLOW_STEP,
-        run_type=current_trace.run_type if current_trace else RunType.KICKOFF,
-        crew_type=current_trace.crew_type if current_trace else CrewType.FLOW,
-        run_id=current_trace.run_id if current_trace else str(self.flow_id),
-        parent_trace_id=current_trace.trace_id if current_trace else None,
-        flow_step={
-            "function_name": method_name,
-            "inputs": inputs,
-            "metadata": {
-                "crew_name": self.__class__.__name__,
-            },
-        },
-    )
-    return trace
-
-
-# LLM trace
-def trace_llm_call(func: Callable[..., Any]) -> Callable[..., Any]:
-    """Decorator to trace LLM calls.
-
-    Args:
-        func: The function to trace.
-
-    Returns:
-        Wrapped function that creates and manages the LLM call trace context.
-    """
-
-    @wraps(func)
-    def wrapper(self: Any, *args: Any, **kwargs: Any) -> Any:
-        if not should_trace():
-            return func(self, *args, **kwargs)
-
-        trace = build_llm_trace(self, *args, **kwargs)
-        with TraceContext.set_current(trace):
-            trace.start_trace()
-            try:
-                response = func(self, *args, **kwargs)
-                # Extract relevant data from response
-                trace_response = {
-                    "content": response["choices"][0]["message"]["content"],
-                    "finish_reason": response["choices"][0].get("finish_reason"),
-                }
-
-                # Add usage metrics to context
-                if "usage" in response:
-                    trace.context["tokens_used"] = response["usage"].get(
-                        "total_tokens", 0
-                    )
-                    trace.context["prompt_tokens"] = response["usage"].get(
-                        "prompt_tokens", 0
-                    )
-                    trace.context["completion_tokens"] = response["usage"].get(
-                        "completion_tokens", 0
-                    )
-
-                trace.end_trace(trace_response)
-                return response
-            except Exception as e:
-                trace.end_trace(error=str(e))
-                raise
-
-    return wrapper
-
-
-def build_llm_trace(
-    self: Any, params: Dict[str, Any], *args: Any, **kwargs: Any
-) -> Any:
-    """Build a trace controller for an LLM call.
-
-    Args:
-        self: The LLM instance.
-        params: The parameters for the LLM call.
-        *args: Variable positional arguments.
-        **kwargs: Variable keyword arguments.
-
-    Returns:
-        UnifiedTraceController: The configured trace controller for the LLM call.
-    """
-    current_trace = TraceContext.get_current()
-    agent, task = self._get_execution_context()
-
-    # Get new messages and tool results
-    new_messages = self._get_new_messages(params.get("messages", []))
-    new_tool_results = self._get_new_tool_results(agent)
-
-    # Create trace context
-    trace = UnifiedTraceController(
-        trace_type=TraceType.TOOL_CALL if new_tool_results else TraceType.LLM_CALL,
-        crew_type=current_trace.crew_type if current_trace else CrewType.CREW,
-        run_type=current_trace.run_type if current_trace else RunType.KICKOFF,
-        run_id=current_trace.run_id if current_trace else str(uuid4()),
-        parent_trace_id=current_trace.trace_id if current_trace else None,
-        agent_role=agent.role if agent else "unknown",
-        task_id=str(task.id) if task else None,
-        task_name=task.name if task else None,
-        task_description=task.description if task else None,
-        model=self.model,
-        messages=new_messages,
-        temperature=self.temperature,
-        max_tokens=self.max_tokens,
-        stop_sequences=self.stop,
-        tool_calls=[
-            ToolCall(
-                name=result["tool_name"],
-                arguments=result["tool_args"],
-                output=str(result["result"]),
-                start_time=result.get("start_time", ""),
-                end_time=datetime.now(UTC),
-            )
-            for result in new_tool_results
-        ],
-    )
-    return trace

src/crewai/translations/en.json

@@ -39,8 +39,8 @@
     "validation_error": "### Previous attempt failed validation: {guardrail_result_error}\n\n\n### Previous result:\n{task_output}\n\n\nTry again, making sure to address the validation error."
   },
   "tools": {
-    "delegate_work": "Delegate a specific task to one of the following coworkers: {coworkers}\nThe input to this tool should be the coworker, the task you want them to do, and ALL necessary context to execute the task, they know nothing about the task, so share absolute everything you know, don't reference things but instead explain them.",
-    "ask_question": "Ask a specific question to one of the following coworkers: {coworkers}\nThe input to this tool should be the coworker, the question you have for them, and ALL necessary context to ask the question properly, they know nothing about the question, so share absolute everything you know, don't reference things but instead explain them.",
+    "delegate_work": "Delegate a specific task to one of the following coworkers: {coworkers}\nThe input to this tool should be the coworker, the task you want them to do, and ALL necessary context to execute the task, they know nothing about the task, so share absolutely everything you know, don't reference things but instead explain them.",
+    "ask_question": "Ask a specific question to one of the following coworkers: {coworkers}\nThe input to this tool should be the coworker, the question you have for them, and ALL necessary context to ask the question properly, they know nothing about the question, so share absolutely everything you know, don't reference things but instead explain them.",
     "add_image": {
       "name": "Add image to content",
       "description": "See image to understand its content, you can optionally ask a question about the image",

src/crewai/utilities/events/__init__.py

@@ -34,6 +34,7 @@ from .tool_usage_events import (
     ToolUsageEvent,
     ToolValidateInputErrorEvent,
 )
+from .llm_events import LLMCallCompletedEvent, LLMCallFailedEvent, LLMCallStartedEvent
 
 # events
 from .event_listener import EventListener

src/crewai/utilities/events/event_listener.py

@@ -1,9 +1,17 @@
-from pydantic import PrivateAttr
+from typing import Any, Dict
 
+from pydantic import Field, PrivateAttr
+
+from crewai.task import Task
 from crewai.telemetry.telemetry import Telemetry
 from crewai.utilities import Logger
 from crewai.utilities.constants import EMITTER_COLOR
 from crewai.utilities.events.base_event_listener import BaseEventListener
+from crewai.utilities.events.llm_events import (
+    LLMCallCompletedEvent,
+    LLMCallFailedEvent,
+    LLMCallStartedEvent,
+)
 
 from .agent_events import AgentExecutionCompletedEvent, AgentExecutionStartedEvent
 from .crew_events import (
@@ -37,6 +45,7 @@ class EventListener(BaseEventListener):
     _instance = None
     _telemetry: Telemetry = PrivateAttr(default_factory=lambda: Telemetry())
     logger = Logger(verbose=True, default_color=EMITTER_COLOR)
+    execution_spans: Dict[Task, Any] = Field(default_factory=dict)
 
     def __new__(cls):
         if cls._instance is None:
@@ -49,6 +58,7 @@ class EventListener(BaseEventListener):
             super().__init__()
             self._telemetry = Telemetry()
             self._telemetry.set_tracer()
+            self.execution_spans = {}
             self._initialized = True
 
     # ----------- CREW EVENTS -----------
@@ -57,7 +67,7 @@ class EventListener(BaseEventListener):
         @crewai_event_bus.on(CrewKickoffStartedEvent)
         def on_crew_started(source, event: CrewKickoffStartedEvent):
             self.logger.log(
-                f"🚀 Crew '{event.crew_name}' started",
+                f"🚀 Crew '{event.crew_name}' started, {source.id}",
                 event.timestamp,
             )
             self._telemetry.crew_execution_span(source, event.inputs)
@@ -67,28 +77,28 @@ class EventListener(BaseEventListener):
             final_string_output = event.output.raw
             self._telemetry.end_crew(source, final_string_output)
             self.logger.log(
-                f"✅ Crew '{event.crew_name}' completed",
+                f"✅ Crew '{event.crew_name}' completed, {source.id}",
                 event.timestamp,
             )
 
         @crewai_event_bus.on(CrewKickoffFailedEvent)
         def on_crew_failed(source, event: CrewKickoffFailedEvent):
             self.logger.log(
-                f"❌ Crew '{event.crew_name}' failed",
+                f"❌ Crew '{event.crew_name}' failed, {source.id}",
                 event.timestamp,
             )
 
         @crewai_event_bus.on(CrewTestStartedEvent)
         def on_crew_test_started(source, event: CrewTestStartedEvent):
             cloned_crew = source.copy()
-            cloned_crew._telemetry.test_execution_span(
+            self._telemetry.test_execution_span(
                 cloned_crew,
                 event.n_iterations,
                 event.inputs,
-                event.eval_llm,
+                event.eval_llm or "",
             )
             self.logger.log(
-                f"🚀 Crew '{event.crew_name}' started test",
+                f"🚀 Crew '{event.crew_name}' started test, {source.id}",
                 event.timestamp,
             )
 
@@ -131,9 +141,9 @@ class EventListener(BaseEventListener):
 
         @crewai_event_bus.on(TaskStartedEvent)
         def on_task_started(source, event: TaskStartedEvent):
-            source._execution_span = self._telemetry.task_started(
-                crew=source.agent.crew, task=source
-            )
+            span = self._telemetry.task_started(crew=source.agent.crew, task=source)
+            self.execution_spans[source] = span
+
             self.logger.log(
                 f"📋 Task started: {source.description}",
                 event.timestamp,
@@ -141,24 +151,22 @@ class EventListener(BaseEventListener):
 
         @crewai_event_bus.on(TaskCompletedEvent)
         def on_task_completed(source, event: TaskCompletedEvent):
-            if source._execution_span:
-                self._telemetry.task_ended(
-                    source._execution_span, source, source.agent.crew
-                )
+            span = self.execution_spans.get(source)
+            if span:
+                self._telemetry.task_ended(span, source, source.agent.crew)
             self.logger.log(
                 f"✅ Task completed: {source.description}",
                 event.timestamp,
             )
-            source._execution_span = None
+            self.execution_spans[source] = None
 
         @crewai_event_bus.on(TaskFailedEvent)
         def on_task_failed(source, event: TaskFailedEvent):
-            if source._execution_span:
+            span = self.execution_spans.get(source)
+            if span:
                 if source.agent and source.agent.crew:
-                    self._telemetry.task_ended(
-                        source._execution_span, source, source.agent.crew
-                    )
-                source._execution_span = None
+                    self._telemetry.task_ended(span, source, source.agent.crew)
+                self.execution_spans[source] = None
             self.logger.log(
                 f"❌ Task failed: {source.description}",
                 event.timestamp,
@@ -184,7 +192,7 @@ class EventListener(BaseEventListener):
 
         @crewai_event_bus.on(FlowCreatedEvent)
         def on_flow_created(source, event: FlowCreatedEvent):
-            self._telemetry.flow_creation_span(self.__class__.__name__)
+            self._telemetry.flow_creation_span(event.flow_name)
             self.logger.log(
                 f"🌊 Flow Created: '{event.flow_name}'",
                 event.timestamp,
@@ -193,17 +201,17 @@ class EventListener(BaseEventListener):
         @crewai_event_bus.on(FlowStartedEvent)
         def on_flow_started(source, event: FlowStartedEvent):
             self._telemetry.flow_execution_span(
-                source.__class__.__name__, list(source._methods.keys())
+                event.flow_name, list(source._methods.keys())
             )
             self.logger.log(
-                f"🤖 Flow Started: '{event.flow_name}'",
+                f"🤖 Flow Started: '{event.flow_name}', {source.flow_id}",
                 event.timestamp,
             )
 
         @crewai_event_bus.on(FlowFinishedEvent)
         def on_flow_finished(source, event: FlowFinishedEvent):
             self.logger.log(
-                f"👍 Flow Finished: '{event.flow_name}'",
+                f"👍 Flow Finished: '{event.flow_name}', {source.flow_id}",
                 event.timestamp,
             )
 
@@ -253,5 +261,28 @@ class EventListener(BaseEventListener):
                 #
             )
 
+        # ----------- LLM EVENTS -----------
+
+        @crewai_event_bus.on(LLMCallStartedEvent)
+        def on_llm_call_started(source, event: LLMCallStartedEvent):
+            self.logger.log(
+                f"🤖 LLM Call Started",
+                event.timestamp,
+            )
+
+        @crewai_event_bus.on(LLMCallCompletedEvent)
+        def on_llm_call_completed(source, event: LLMCallCompletedEvent):
+            self.logger.log(
+                f"✅ LLM Call Completed",
+                event.timestamp,
+            )
+
+        @crewai_event_bus.on(LLMCallFailedEvent)
+        def on_llm_call_failed(source, event: LLMCallFailedEvent):
+            self.logger.log(
+                f"❌ LLM Call Failed: '{event.error}'",
+                event.timestamp,
+            )
+
 
 event_listener = EventListener()

src/crewai/utilities/events/llm_events.py

@@ -0,0 +1,36 @@
+from enum import Enum
+from typing import Any, Dict, List, Optional, Union
+
+from crewai.utilities.events.base_events import CrewEvent
+
+
+class LLMCallType(Enum):
+    """Type of LLM call being made"""
+
+    TOOL_CALL = "tool_call"
+    LLM_CALL = "llm_call"
+
+
+class LLMCallStartedEvent(CrewEvent):
+    """Event emitted when a LLM call starts"""
+
+    type: str = "llm_call_started"
+    messages: Union[str, List[Dict[str, str]]]
+    tools: Optional[List[dict]] = None
+    callbacks: Optional[List[Any]] = None
+    available_functions: Optional[Dict[str, Any]] = None
+
+
+class LLMCallCompletedEvent(CrewEvent):
+    """Event emitted when a LLM call completes"""
+
+    type: str = "llm_call_completed"
+    response: Any
+    call_type: LLMCallType
+
+
+class LLMCallFailedEvent(CrewEvent):
+    """Event emitted when a LLM call fails"""
+
+    error: str
+    type: str = "llm_call_failed"

src/crewai/utilities/events/task_events.py

@@ -1,4 +1,4 @@
-from typing import Any, Optional
+from typing import Optional
 
 from crewai.tasks.task_output import TaskOutput
 from crewai.utilities.events.base_events import CrewEvent

src/crewai/utilities/llm_utils.py

@@ -44,6 +44,7 @@ def create_llm(
         # Extract attributes with explicit types
         model = (
             getattr(llm_value, "model_name", None)
+            or getattr(llm_value, "model", None)
             or getattr(llm_value, "deployment_name", None)
             or str(llm_value)
         )

src/crewai/utilities/protocols.py

@@ -1,12 +0,0 @@
-from typing import Any, Protocol, runtime_checkable
-
-
-@runtime_checkable
-class AgentExecutorProtocol(Protocol):
-    """Protocol defining the expected interface for an agent executor."""
-
-    @property
-    def agent(self) -> Any: ...
-
-    @property
-    def task(self) -> Any: ...

tests/agent_test.py

@@ -915,8 +915,6 @@ def test_tool_result_as_answer_is_the_final_answer_for_the_agent():
 
 @pytest.mark.vcr(filter_headers=["authorization"])
 def test_tool_usage_information_is_appended_to_agent():
-    from datetime import UTC, datetime
-
     from crewai.tools import BaseTool
 
     class MyCustomTool(BaseTool):
@@ -926,36 +924,30 @@ def test_tool_usage_information_is_appended_to_agent():
         def _run(self) -> str:
             return "Howdy!"
 
-    fixed_datetime = datetime(2025, 2, 10, 12, 0, 0, tzinfo=UTC)
-    with patch("datetime.datetime") as mock_datetime:
-        mock_datetime.now.return_value = fixed_datetime
-        mock_datetime.side_effect = lambda *args, **kw: datetime(*args, **kw)
+    agent1 = Agent(
+        role="Friendly Neighbor",
+        goal="Make everyone feel welcome",
+        backstory="You are the friendly neighbor",
+        tools=[MyCustomTool(result_as_answer=True)],
+    )
 
-        agent1 = Agent(
-            role="Friendly Neighbor",
-            goal="Make everyone feel welcome",
-            backstory="You are the friendly neighbor",
-            tools=[MyCustomTool(result_as_answer=True)],
-        )
+    greeting = Task(
+        description="Say an appropriate greeting.",
+        expected_output="The greeting.",
+        agent=agent1,
+    )
+    tasks = [greeting]
+    crew = Crew(agents=[agent1], tasks=tasks)
 
-        greeting = Task(
-            description="Say an appropriate greeting.",
-            expected_output="The greeting.",
-            agent=agent1,
-        )
-        tasks = [greeting]
-        crew = Crew(agents=[agent1], tasks=tasks)
-
-        crew.kickoff()
-        assert agent1.tools_results == [
-            {
-                "result": "Howdy!",
-                "tool_name": "Decide Greetings",
-                "tool_args": {},
-                "result_as_answer": True,
-                "start_time": fixed_datetime,
-            }
-        ]
+    crew.kickoff()
+    assert agent1.tools_results == [
+        {
+            "result": "Howdy!",
+            "tool_name": "Decide Greetings",
+            "tool_args": {},
+            "result_as_answer": True,
+        }
+    ]
 
 
 def test_agent_definition_based_on_dict():

tests/crew_test.py

@@ -833,6 +833,12 @@ def test_crew_verbose_output(capsys):
 
     crew.kickoff()
     captured = capsys.readouterr()
+
+    # Filter out event listener logs (lines starting with '[')
+    filtered_output = "\n".join(
+        line for line in captured.out.split("\n") if not line.startswith("[")
+    )
+
     expected_strings = [
         "\x1b[1m\x1b[95m# Agent:\x1b[00m \x1b[1m\x1b[92mResearcher",
         "\x1b[00m\n\x1b[95m## Task:\x1b[00m \x1b[92mResearch AI advancements.",
@@ -845,27 +851,19 @@ def test_crew_verbose_output(capsys):
     ]
 
     for expected_string in expected_strings:
-        assert expected_string in captured.out
+        assert expected_string in filtered_output
 
     # Now test with verbose set to False
     crew.verbose = False
     crew._logger = Logger(verbose=False)
     crew.kickoff()
-    expected_listener_logs = [
-        "[🚀 CREW 'CREW' STARTED]",
-        "[📋 TASK STARTED: RESEARCH AI ADVANCEMENTS.]",
-        "[🤖 AGENT 'RESEARCHER' STARTED TASK]",
-        "[✅ AGENT 'RESEARCHER' COMPLETED TASK]",
-        "[✅ TASK COMPLETED: RESEARCH AI ADVANCEMENTS.]",
-        "[📋 TASK STARTED: WRITE ABOUT AI IN HEALTHCARE.]",
-        "[🤖 AGENT 'SENIOR WRITER' STARTED TASK]",
-        "[✅ AGENT 'SENIOR WRITER' COMPLETED TASK]",
-        "[✅ TASK COMPLETED: WRITE ABOUT AI IN HEALTHCARE.]",
-        "[✅ CREW 'CREW' COMPLETED]",
-    ]
     captured = capsys.readouterr()
-    for log in expected_listener_logs:
-        assert log in captured.out
+    filtered_output = "\n".join(
+        line
+        for line in captured.out.split("\n")
+        if not line.startswith("[") and line.strip() and not line.startswith("\x1b")
+    )
+    assert filtered_output == ""
 
 
 @pytest.mark.vcr(filter_headers=["authorization"])

tests/llm_test.py

@@ -6,7 +6,7 @@ import pytest
 from pydantic import BaseModel
 
 from crewai.agents.agent_builder.utilities.base_token_process import TokenProcess
-from crewai.llm import LLM
+from crewai.llm import CONTEXT_WINDOW_USAGE_RATIO, LLM
 from crewai.utilities.events import crewai_event_bus
 from crewai.utilities.events.tool_usage_events import ToolExecutionErrorEvent
 from crewai.utilities.token_counter_callback import TokenCalcHandler
@@ -285,6 +285,23 @@ def test_o3_mini_reasoning_effort_medium():
     assert isinstance(result, str)
     assert "Paris" in result
 
+def test_context_window_validation():
+    """Test that context window validation works correctly."""
+    # Test valid window size
+    llm = LLM(model="o3-mini")
+    assert llm.get_context_window_size() == int(200000 * CONTEXT_WINDOW_USAGE_RATIO)
+
+    # Test invalid window size
+    with pytest.raises(ValueError) as excinfo:
+        with patch.dict(
+            "crewai.llm.LLM_CONTEXT_WINDOW_SIZES",
+            {"test-model": 500},  # Below minimum
+            clear=True,
+        ):
+            llm = LLM(model="test-model")
+            llm.get_context_window_size()
+    assert "must be between 1024 and 2097152" in str(excinfo.value)
+
 
 @pytest.mark.vcr(filter_headers=["authorization"])
 @pytest.fixture

tests/traces/test_unified_trace_controller.py

@@ -1,360 +0,0 @@
-import os
-from datetime import UTC, datetime
-from unittest.mock import MagicMock, patch
-from uuid import UUID
-
-import pytest
-
-from crewai.traces.context import TraceContext
-from crewai.traces.enums import CrewType, RunType, TraceType
-from crewai.traces.models import (
-    CrewTrace,
-    FlowStepIO,
-    LLMRequest,
-    LLMResponse,
-)
-from crewai.traces.unified_trace_controller import (
-    UnifiedTraceController,
-    init_crew_main_trace,
-    init_flow_main_trace,
-    should_trace,
-    trace_flow_step,
-    trace_llm_call,
-)
-
-
-class TestUnifiedTraceController:
-    @pytest.fixture
-    def basic_trace_controller(self):
-        return UnifiedTraceController(
-            trace_type=TraceType.LLM_CALL,
-            run_type=RunType.KICKOFF,
-            crew_type=CrewType.CREW,
-            run_id="test-run-id",
-            agent_role="test-agent",
-            task_name="test-task",
-            task_description="test description",
-            task_id="test-task-id",
-        )
-
-    def test_initialization(self, basic_trace_controller):
-        """Test basic initialization of UnifiedTraceController"""
-        assert basic_trace_controller.trace_type == TraceType.LLM_CALL
-        assert basic_trace_controller.run_type == RunType.KICKOFF
-        assert basic_trace_controller.crew_type == CrewType.CREW
-        assert basic_trace_controller.run_id == "test-run-id"
-        assert basic_trace_controller.agent_role == "test-agent"
-        assert basic_trace_controller.task_name == "test-task"
-        assert basic_trace_controller.task_description == "test description"
-        assert basic_trace_controller.task_id == "test-task-id"
-        assert basic_trace_controller.status == "running"
-        assert isinstance(UUID(basic_trace_controller.trace_id), UUID)
-
-    def test_start_trace(self, basic_trace_controller):
-        """Test starting a trace"""
-        result = basic_trace_controller.start_trace()
-        assert result == basic_trace_controller
-        assert basic_trace_controller.start_time is not None
-        assert isinstance(basic_trace_controller.start_time, datetime)
-
-    def test_end_trace_success(self, basic_trace_controller):
-        """Test ending a trace successfully"""
-        basic_trace_controller.start_trace()
-        basic_trace_controller.end_trace(result={"test": "result"})
-
-        assert basic_trace_controller.end_time is not None
-        assert basic_trace_controller.status == "completed"
-        assert basic_trace_controller.error is None
-        assert basic_trace_controller.context.get("response") == {"test": "result"}
-
-    def test_end_trace_with_error(self, basic_trace_controller):
-        """Test ending a trace with an error"""
-        basic_trace_controller.start_trace()
-        basic_trace_controller.end_trace(error="Test error occurred")
-
-        assert basic_trace_controller.end_time is not None
-        assert basic_trace_controller.status == "error"
-        assert basic_trace_controller.error == "Test error occurred"
-
-    def test_add_child_trace(self, basic_trace_controller):
-        """Test adding a child trace"""
-        child_trace = {"id": "child-1", "type": "test"}
-        basic_trace_controller.add_child_trace(child_trace)
-        assert len(basic_trace_controller.children) == 1
-        assert basic_trace_controller.children[0] == child_trace
-
-    def test_to_crew_trace_llm_call(self):
-        """Test converting to CrewTrace for LLM call"""
-        test_messages = [{"role": "user", "content": "test"}]
-        test_response = {
-            "content": "test response",
-            "finish_reason": "stop",
-        }
-
-        controller = UnifiedTraceController(
-            trace_type=TraceType.LLM_CALL,
-            run_type=RunType.KICKOFF,
-            crew_type=CrewType.CREW,
-            run_id="test-run-id",
-            context={
-                "messages": test_messages,
-                "temperature": 0.7,
-                "max_tokens": 100,
-            },
-        )
-
-        # Set model and messages in the context
-        controller.context["model"] = "gpt-4"
-        controller.context["messages"] = test_messages
-
-        controller.start_trace()
-        controller.end_trace(result=test_response)
-
-        crew_trace = controller.to_crew_trace()
-        assert isinstance(crew_trace, CrewTrace)
-        assert isinstance(crew_trace.request, LLMRequest)
-        assert isinstance(crew_trace.response, LLMResponse)
-        assert crew_trace.request.model == "gpt-4"
-        assert crew_trace.request.messages == test_messages
-        assert crew_trace.response.content == test_response["content"]
-        assert crew_trace.response.finish_reason == test_response["finish_reason"]
-
-    def test_to_crew_trace_flow_step(self):
-        """Test converting to CrewTrace for flow step"""
-        flow_step_data = {
-            "function_name": "test_function",
-            "inputs": {"param1": "value1"},
-            "metadata": {"meta": "data"},
-        }
-
-        controller = UnifiedTraceController(
-            trace_type=TraceType.FLOW_STEP,
-            run_type=RunType.KICKOFF,
-            crew_type=CrewType.FLOW,
-            run_id="test-run-id",
-            flow_step=flow_step_data,
-        )
-
-        controller.start_trace()
-        controller.end_trace(result="test result")
-
-        crew_trace = controller.to_crew_trace()
-        assert isinstance(crew_trace, CrewTrace)
-        assert isinstance(crew_trace.flow_step, FlowStepIO)
-        assert crew_trace.flow_step.function_name == "test_function"
-        assert crew_trace.flow_step.inputs == {"param1": "value1"}
-        assert crew_trace.flow_step.outputs == {"result": "test result"}
-
-    def test_should_trace(self):
-        """Test should_trace function"""
-        with patch.dict(os.environ, {"CREWAI_ENABLE_TRACING": "true"}):
-            assert should_trace() is True
-
-        with patch.dict(os.environ, {"CREWAI_ENABLE_TRACING": "false"}):
-            assert should_trace() is False
-
-        with patch.dict(os.environ, clear=True):
-            assert should_trace() is False
-
-    @pytest.mark.asyncio
-    async def test_trace_flow_step_decorator(self):
-        """Test trace_flow_step decorator"""
-
-        class TestFlow:
-            flow_id = "test-flow-id"
-
-            @trace_flow_step
-            async def test_method(self, method_name, method, *args, **kwargs):
-                return "test result"
-
-        with patch.dict(os.environ, {"CREWAI_ENABLE_TRACING": "true"}):
-            flow = TestFlow()
-            result = await flow.test_method("test_method", lambda x: x, arg1="value1")
-            assert result == "test result"
-
-    def test_trace_llm_call_decorator(self):
-        """Test trace_llm_call decorator"""
-
-        class TestLLM:
-            model = "gpt-4"
-            temperature = 0.7
-            max_tokens = 100
-            stop = None
-
-            def _get_execution_context(self):
-                return MagicMock(), MagicMock()
-
-            def _get_new_messages(self, messages):
-                return messages
-
-            def _get_new_tool_results(self, agent):
-                return []
-
-            @trace_llm_call
-            def test_method(self, params):
-                return {
-                    "choices": [
-                        {
-                            "message": {"content": "test response"},
-                            "finish_reason": "stop",
-                        }
-                    ],
-                    "usage": {
-                        "total_tokens": 50,
-                        "prompt_tokens": 20,
-                        "completion_tokens": 30,
-                    },
-                }
-
-        with patch.dict(os.environ, {"CREWAI_ENABLE_TRACING": "true"}):
-            llm = TestLLM()
-            result = llm.test_method({"messages": []})
-            assert result["choices"][0]["message"]["content"] == "test response"
-
-    def test_init_crew_main_trace_kickoff(self):
-        """Test init_crew_main_trace in kickoff mode"""
-        trace_context = None
-
-        class TestCrew:
-            id = "test-crew-id"
-            _test = False
-            _train = False
-
-        @init_crew_main_trace
-        def test_method(self):
-            nonlocal trace_context
-            trace_context = TraceContext.get_current()
-            return "test result"
-
-        with patch.dict(os.environ, {"CREWAI_ENABLE_TRACING": "true"}):
-            crew = TestCrew()
-            result = test_method(crew)
-            assert result == "test result"
-            assert trace_context is not None
-            assert trace_context.trace_type == TraceType.LLM_CALL
-            assert trace_context.run_type == RunType.KICKOFF
-            assert trace_context.crew_type == CrewType.CREW
-            assert trace_context.run_id == str(crew.id)
-
-    def test_init_crew_main_trace_test_mode(self):
-        """Test init_crew_main_trace in test mode"""
-        trace_context = None
-
-        class TestCrew:
-            id = "test-crew-id"
-            _test = True
-            _train = False
-
-        @init_crew_main_trace
-        def test_method(self):
-            nonlocal trace_context
-            trace_context = TraceContext.get_current()
-            return "test result"
-
-        with patch.dict(os.environ, {"CREWAI_ENABLE_TRACING": "true"}):
-            crew = TestCrew()
-            result = test_method(crew)
-            assert result == "test result"
-            assert trace_context is not None
-            assert trace_context.run_type == RunType.TEST
-
-    def test_init_crew_main_trace_train_mode(self):
-        """Test init_crew_main_trace in train mode"""
-        trace_context = None
-
-        class TestCrew:
-            id = "test-crew-id"
-            _test = False
-            _train = True
-
-        @init_crew_main_trace
-        def test_method(self):
-            nonlocal trace_context
-            trace_context = TraceContext.get_current()
-            return "test result"
-
-        with patch.dict(os.environ, {"CREWAI_ENABLE_TRACING": "true"}):
-            crew = TestCrew()
-            result = test_method(crew)
-            assert result == "test result"
-            assert trace_context is not None
-            assert trace_context.run_type == RunType.TRAIN
-
-    @pytest.mark.asyncio
-    async def test_init_flow_main_trace(self):
-        """Test init_flow_main_trace decorator"""
-        trace_context = None
-        test_inputs = {"test": "input"}
-
-        class TestFlow:
-            flow_id = "test-flow-id"
-
-            @init_flow_main_trace
-            async def test_method(self, **kwargs):
-                nonlocal trace_context
-                trace_context = TraceContext.get_current()
-                # Verify the context is set during execution
-                assert trace_context.context["context"]["inputs"] == test_inputs
-                return "test result"
-
-        with patch.dict(os.environ, {"CREWAI_ENABLE_TRACING": "true"}):
-            flow = TestFlow()
-            result = await flow.test_method(inputs=test_inputs)
-            assert result == "test result"
-            assert trace_context is not None
-            assert trace_context.trace_type == TraceType.FLOW_STEP
-            assert trace_context.crew_type == CrewType.FLOW
-            assert trace_context.run_type == RunType.KICKOFF
-            assert trace_context.run_id == str(flow.flow_id)
-            assert trace_context.context["context"]["inputs"] == test_inputs
-
-    def test_trace_context_management(self):
-        """Test TraceContext management"""
-        trace1 = UnifiedTraceController(
-            trace_type=TraceType.LLM_CALL,
-            run_type=RunType.KICKOFF,
-            crew_type=CrewType.CREW,
-            run_id="test-run-1",
-        )
-
-        trace2 = UnifiedTraceController(
-            trace_type=TraceType.FLOW_STEP,
-            run_type=RunType.TEST,
-            crew_type=CrewType.FLOW,
-            run_id="test-run-2",
-        )
-
-        # Test that context is initially empty
-        assert TraceContext.get_current() is None
-
-        # Test setting and getting context
-        with TraceContext.set_current(trace1):
-            assert TraceContext.get_current() == trace1
-
-            # Test nested context
-            with TraceContext.set_current(trace2):
-                assert TraceContext.get_current() == trace2
-
-            # Test context restoration after nested block
-            assert TraceContext.get_current() == trace1
-
-        # Test context cleanup after with block
-        assert TraceContext.get_current() is None
-
-    def test_trace_context_error_handling(self):
-        """Test TraceContext error handling"""
-        trace = UnifiedTraceController(
-            trace_type=TraceType.LLM_CALL,
-            run_type=RunType.KICKOFF,
-            crew_type=CrewType.CREW,
-            run_id="test-run",
-        )
-
-        # Test that context is properly cleaned up even if an error occurs
-        try:
-            with TraceContext.set_current(trace):
-                raise ValueError("Test error")
-        except ValueError:
-            pass
-
-        assert TraceContext.get_current() is None

tests/utilities/cassettes/test_converter_with_llama3_2_model.yaml

@@ -5,32 +5,860 @@ interactions:
       JSON must follow this format exactly:\n{\n  \"name\": str,\n  \"age\": int\n}\n\n###
       User:\nName: Alice Llama, Age: 30\n\n", "options": {"stop": []}, "stream": false}'
     headers:
-      Accept:
+      accept:
       - '*/*'
-      Accept-Encoding:
+      accept-encoding:
       - gzip, deflate
-      Connection:
+      connection:
       - keep-alive
-      Content-Length:
+      content-length:
       - '321'
-      Content-Type:
-      - application/json
-      User-Agent:
-      - python-requests/2.32.2
+      host:
+      - localhost:11434
+      user-agent:
+      - litellm/1.60.2
     method: POST
     uri: http://localhost:11434/api/generate
   response:
-    body:
-      string: '{"model":"llama3.2:3b","created_at":"2025-02-18T21:52:20.737635Z","response":"{\"name\":
-        \"Alice Llama\", \"age\": 30}","done":true,"done_reason":"stop","context":[128006,9125,128007,271,38766,1303,33025,2696,25,6790,220,2366,18,271,128009,128006,882,128007,271,14711,744,512,5618,5625,279,2768,1495,1139,2764,4823,382,5207,27785,279,2764,4823,323,4400,775,382,791,4823,2011,1833,420,3645,7041,512,517,220,330,609,794,610,345,220,330,425,794,528,198,633,14711,2724,512,678,25,30505,445,81101,11,13381,25,220,966,271,128009,128006,78191,128007,271,5018,609,794,330,62786,445,81101,498,330,425,794,220,966,92],"total_duration":2438288750,"load_duration":819026959,"prompt_eval_count":82,"prompt_eval_duration":1368000000,"eval_count":15,"eval_duration":249000000}'
+    content: '{"model":"llama3.2:3b","created_at":"2025-02-21T02:57:55.059392Z","response":"{\"name\":
+      \"Alice Llama\", \"age\": 30}","done":true,"done_reason":"stop","context":[128006,9125,128007,271,38766,1303,33025,2696,25,6790,220,2366,18,271,128009,128006,882,128007,271,14711,744,512,5618,5625,279,2768,1495,1139,2764,4823,382,5207,27785,279,2764,4823,323,4400,775,382,791,4823,2011,1833,420,3645,7041,512,517,220,330,609,794,610,345,220,330,425,794,528,198,633,14711,2724,512,678,25,30505,445,81101,11,13381,25,220,966,271,128009,128006,78191,128007,271,5018,609,794,330,62786,445,81101,498,330,425,794,220,966,92],"total_duration":4675906000,"load_duration":836091458,"prompt_eval_count":82,"prompt_eval_duration":3561000000,"eval_count":15,"eval_duration":275000000}'
     headers:
       Content-Length:
       - '761'
       Content-Type:
       - application/json; charset=utf-8
       Date:
-      - Tue, 18 Feb 2025 21:52:21 GMT
-    status:
-      code: 200
-      message: OK
+      - Fri, 21 Feb 2025 02:57:55 GMT
+    http_version: HTTP/1.1
+    status_code: 200
+- request:
+    body: '{"name": "llama3.2:3b"}'
+    headers:
+      accept:
+      - '*/*'
+      accept-encoding:
+      - gzip, deflate
+      connection:
+      - keep-alive
+      content-length:
+      - '23'
+      content-type:
+      - application/json
+      host:
+      - localhost:11434
+      user-agent:
+      - litellm/1.60.2
+    method: POST
+    uri: http://localhost:11434/api/show
+  response:
+    content: "{\"license\":\"LLAMA 3.2 COMMUNITY LICENSE AGREEMENT\\nLlama 3.2 Version
+      Release Date: September 25, 2024\\n\\n\u201CAgreement\u201D means the terms
+      and conditions for use, reproduction, distribution \\nand modification of the
+      Llama Materials set forth herein.\\n\\n\u201CDocumentation\u201D means the specifications,
+      manuals and documentation accompanying Llama 3.2\\ndistributed by Meta at https://llama.meta.com/doc/overview.\\n\\n\u201CLicensee\u201D
+      or \u201Cyou\u201D means you, or your employer or any other person or entity
+      (if you are \\nentering into this Agreement on such person or entity\u2019s
+      behalf), of the age required under\\napplicable laws, rules or regulations to
+      provide legal consent and that has legal authority\\nto bind your employer or
+      such other person or entity if you are entering in this Agreement\\non their
+      behalf.\\n\\n\u201CLlama 3.2\u201D means the foundational large language models
+      and software and algorithms, including\\nmachine-learning model code, trained
+      model weights, inference-enabling code, training-enabling code,\\nfine-tuning
+      enabling code and other elements of the foregoing distributed by Meta at \\nhttps://www.llama.com/llama-downloads.\\n\\n\u201CLlama
+      Materials\u201D means, collectively, Meta\u2019s proprietary Llama 3.2 and Documentation
+      (and \\nany portion thereof) made available under this Agreement.\\n\\n\u201CMeta\u201D
+      or \u201Cwe\u201D means Meta Platforms Ireland Limited (if you are located in
+      or, \\nif you are an entity, your principal place of business is in the EEA
+      or Switzerland) \\nand Meta Platforms, Inc. (if you are located outside of the
+      EEA or Switzerland). \\n\\n\\nBy clicking \u201CI Accept\u201D below or by using
+      or distributing any portion or element of the Llama Materials,\\nyou agree to
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+      \   a. Grant of Rights. You are granted a non-exclusive, worldwide, \\nnon-transferable
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+      other rights \\nowned by Meta embodied in the Llama Materials to use, reproduce,
+      distribute, copy, create derivative works \\nof, and make modifications to the
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+      If you use the\\nLlama Materials or any outputs or results of the Llama Materials
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+      \       iii. You must retain in all copies of the Llama Materials that you distribute
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+      Community License, Copyright \xA9 Meta Platforms,\\nInc. All Rights Reserved.\u201D\\n\\n
+      \       iv. Your use of the Llama Materials must comply with applicable laws
+      and regulations\\n(including trade compliance laws and regulations) and adhere
+      to the Acceptable Use Policy for\\nthe Llama Materials (available at https://www.llama.com/llama3_2/use-policy),
+      which is hereby \\nincorporated by reference into this Agreement.\\n  \\n2.
+      Additional Commercial Terms. If, on the Llama 3.2 version release date, the
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+      from Meta, which Meta may grant to you in its sole discretion, and you are not
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+      UNLESS REQUIRED BY APPLICABLE LAW, THE LLAMA MATERIALS AND ANY OUTPUT AND \\nRESULTS
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+      IMPLIED, INCLUDING, WITHOUT LIMITATION, ANY WARRANTIES\\nOF TITLE, NON-INFRINGEMENT,
+      MERCHANTABILITY, OR FITNESS FOR A PARTICULAR PURPOSE. YOU ARE SOLELY RESPONSIBLE\\nFOR
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+      \   a. No trademark licenses are granted under this Agreement, and in connection
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+      owned by or associated with the other or any of its affiliates, \\nexcept as
+      required for reasonable and customary use in describing and redistributing the
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+      \\nto comply with the last sentence of Section 1.b.i. You will comply with Meta\u2019s
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+      All goodwill arising out of your use of the Mark \\nwill inure to the benefit
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+      The illegal distribution of information or materials to minors, including obscene
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+      \\\"LLAMA 3.2 COMMUNITY LICENSE AGREEMENT\\nLlama 3.2 Version Release Date:
+      September 25, 2024\\n\\n\u201CAgreement\u201D means the terms and conditions
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+      other rights \\nowned by Meta embodied in the Llama Materials to use, reproduce,
+      distribute, copy, create derivative works \\nof, and make modifications to the
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+      thereof), \\nor a product or service (including another AI model) that contains
+      any of them, you shall (A) provide\\na copy of this Agreement with any such
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+      If you use the\\nLlama Materials or any outputs or results of the Llama Materials
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+      of any such AI model name.\\n\\n        ii. If you receive Llama Materials,
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+      \       iii. You must retain in all copies of the Llama Materials that you distribute
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+      as a part of such copies: \\n\u201CLlama 3.2 is licensed under the Llama 3.2
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+      \       iv. Your use of the Llama Materials must comply with applicable laws
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+      UNLESS REQUIRED BY APPLICABLE LAW, THE LLAMA MATERIALS AND ANY OUTPUT AND \\nRESULTS
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+      ANY KIND, AND META DISCLAIMS\\nALL WARRANTIES OF ANY KIND, BOTH EXPRESS AND
+      IMPLIED, INCLUDING, WITHOUT LIMITATION, ANY WARRANTIES\\nOF TITLE, NON-INFRINGEMENT,
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+      \   a. No trademark licenses are granted under this Agreement, and in connection
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+      owned by or associated with the other or any of its affiliates, \\nexcept as
+      required for reasonable and customary use in describing and redistributing the
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tests/utilities/cassettes/test_llm_emits_call_started_event.yaml

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tests/utilities/test_events.py

@@ -1,6 +1,5 @@
-import json
 from datetime import datetime
-from unittest.mock import MagicMock, patch
+from unittest.mock import Mock, patch
 
 import pytest
 from pydantic import Field
@@ -9,9 +8,9 @@ from crewai.agent import Agent
 from crewai.agents.crew_agent_executor import CrewAgentExecutor
 from crewai.crew import Crew
 from crewai.flow.flow import Flow, listen, start
+from crewai.llm import LLM
 from crewai.task import Task
 from crewai.tools.base_tool import BaseTool
-from crewai.tools.tool_usage import ToolUsage
 from crewai.utilities.events.agent_events import (
     AgentExecutionCompletedEvent,
     AgentExecutionErrorEvent,
@@ -21,8 +20,11 @@ from crewai.utilities.events.crew_events import (
     CrewKickoffCompletedEvent,
     CrewKickoffFailedEvent,
     CrewKickoffStartedEvent,
+    CrewTestCompletedEvent,
+    CrewTestStartedEvent,
 )
 from crewai.utilities.events.crewai_event_bus import crewai_event_bus
+from crewai.utilities.events.event_listener import EventListener
 from crewai.utilities.events.event_types import ToolUsageFinishedEvent
 from crewai.utilities.events.flow_events import (
     FlowCreatedEvent,
@@ -31,6 +33,12 @@ from crewai.utilities.events.flow_events import (
     MethodExecutionFailedEvent,
     MethodExecutionStartedEvent,
 )
+from crewai.utilities.events.llm_events import (
+    LLMCallCompletedEvent,
+    LLMCallFailedEvent,
+    LLMCallStartedEvent,
+    LLMCallType,
+)
 from crewai.utilities.events.task_events import (
     TaskCompletedEvent,
     TaskFailedEvent,
@@ -52,26 +60,35 @@ base_task = Task(
     expected_output="hi",
     agent=base_agent,
 )
+event_listener = EventListener()
 
 
 @pytest.mark.vcr(filter_headers=["authorization"])
 def test_crew_emits_start_kickoff_event():
     received_events = []
+    mock_span = Mock()
 
-    with crewai_event_bus.scoped_handlers():
-
-        @crewai_event_bus.on(CrewKickoffStartedEvent)
-        def handle_crew_start(source, event):
-            received_events.append(event)
-
-        crew = Crew(agents=[base_agent], tasks=[base_task], name="TestCrew")
+    @crewai_event_bus.on(CrewKickoffStartedEvent)
+    def handle_crew_start(source, event):
+        received_events.append(event)
 
+    crew = Crew(agents=[base_agent], tasks=[base_task], name="TestCrew")
+    with (
+        patch.object(
+            event_listener._telemetry, "crew_execution_span", return_value=mock_span
+        ) as mock_crew_execution_span,
+        patch.object(
+            event_listener._telemetry, "end_crew", return_value=mock_span
+        ) as mock_crew_ended,
+    ):
         crew.kickoff()
+    mock_crew_execution_span.assert_called_once_with(crew, None)
+    mock_crew_ended.assert_called_once_with(crew, "hi")
 
-        assert len(received_events) == 1
-        assert received_events[0].crew_name == "TestCrew"
-        assert isinstance(received_events[0].timestamp, datetime)
-        assert received_events[0].type == "crew_kickoff_started"
+    assert len(received_events) == 1
+    assert received_events[0].crew_name == "TestCrew"
+    assert isinstance(received_events[0].timestamp, datetime)
+    assert received_events[0].type == "crew_kickoff_started"
 
 
 @pytest.mark.vcr(filter_headers=["authorization"])
@@ -92,6 +109,45 @@ def test_crew_emits_end_kickoff_event():
     assert received_events[0].type == "crew_kickoff_completed"
 
 
+@pytest.mark.vcr(filter_headers=["authorization"])
+def test_crew_emits_test_kickoff_type_event():
+    received_events = []
+    mock_span = Mock()
+
+    @crewai_event_bus.on(CrewTestStartedEvent)
+    def handle_crew_end(source, event):
+        received_events.append(event)
+
+    @crewai_event_bus.on(CrewTestCompletedEvent)
+    def handle_crew_test_end(source, event):
+        received_events.append(event)
+
+    eval_llm = LLM(model="gpt-4o-mini")
+    with (
+        patch.object(
+            event_listener._telemetry, "test_execution_span", return_value=mock_span
+        ) as mock_crew_execution_span,
+    ):
+        crew = Crew(agents=[base_agent], tasks=[base_task], name="TestCrew")
+        crew.test(n_iterations=1, eval_llm=eval_llm)
+
+        # Verify the call was made with correct argument types and values
+        assert mock_crew_execution_span.call_count == 1
+        args = mock_crew_execution_span.call_args[0]
+        assert isinstance(args[0], Crew)
+        assert args[1] == 1
+        assert args[2] is None
+        assert args[3] == eval_llm
+
+    assert len(received_events) == 2
+    assert received_events[0].crew_name == "TestCrew"
+    assert isinstance(received_events[0].timestamp, datetime)
+    assert received_events[0].type == "crew_test_started"
+    assert received_events[1].crew_name == "TestCrew"
+    assert isinstance(received_events[1].timestamp, datetime)
+    assert received_events[1].type == "crew_test_completed"
+
+
 @pytest.mark.vcr(filter_headers=["authorization"])
 def test_crew_emits_kickoff_failed_event():
     received_events = []
@@ -142,9 +198,20 @@ def test_crew_emits_end_task_event():
     def handle_task_end(source, event):
         received_events.append(event)
 
+    mock_span = Mock()
     crew = Crew(agents=[base_agent], tasks=[base_task], name="TestCrew")
+    with (
+        patch.object(
+            event_listener._telemetry, "task_started", return_value=mock_span
+        ) as mock_task_started,
+        patch.object(
+            event_listener._telemetry, "task_ended", return_value=mock_span
+        ) as mock_task_ended,
+    ):
+        crew.kickoff()
 
-    crew.kickoff()
+    mock_task_started.assert_called_once_with(crew=crew, task=base_task)
+    mock_task_ended.assert_called_once_with(mock_span, base_task, crew)
 
     assert len(received_events) == 1
     assert isinstance(received_events[0].timestamp, datetime)
@@ -334,24 +401,29 @@ def test_tools_emits_error_events():
 
 def test_flow_emits_start_event():
     received_events = []
+    mock_span = Mock()
 
-    with crewai_event_bus.scoped_handlers():
+    @crewai_event_bus.on(FlowStartedEvent)
+    def handle_flow_start(source, event):
+        received_events.append(event)
 
-        @crewai_event_bus.on(FlowStartedEvent)
-        def handle_flow_start(source, event):
-            received_events.append(event)
-
-        class TestFlow(Flow[dict]):
-            @start()
-            def begin(self):
-                return "started"
+    class TestFlow(Flow[dict]):
+        @start()
+        def begin(self):
+            return "started"
 
+    with (
+        patch.object(
+            event_listener._telemetry, "flow_execution_span", return_value=mock_span
+        ) as mock_flow_execution_span,
+    ):
         flow = TestFlow()
         flow.kickoff()
 
-        assert len(received_events) == 1
-        assert received_events[0].flow_name == "TestFlow"
-        assert received_events[0].type == "flow_started"
+    mock_flow_execution_span.assert_called_once_with("TestFlow", ["begin"])
+    assert len(received_events) == 1
+    assert received_events[0].flow_name == "TestFlow"
+    assert received_events[0].type == "flow_started"
 
 
 def test_flow_emits_finish_event():
@@ -455,6 +527,7 @@ def test_multiple_handlers_for_same_event():
 
 def test_flow_emits_created_event():
     received_events = []
+    mock_span = Mock()
 
     @crewai_event_bus.on(FlowCreatedEvent)
     def handle_flow_created(source, event):
@@ -465,8 +538,15 @@ def test_flow_emits_created_event():
         def begin(self):
             return "started"
 
-    flow = TestFlow()
-    flow.kickoff()
+    with (
+        patch.object(
+            event_listener._telemetry, "flow_creation_span", return_value=mock_span
+        ) as mock_flow_creation_span,
+    ):
+        flow = TestFlow()
+        flow.kickoff()
+
+    mock_flow_creation_span.assert_called_once_with("TestFlow")
 
     assert len(received_events) == 1
     assert received_events[0].flow_name == "TestFlow"
@@ -495,3 +575,43 @@ def test_flow_emits_method_execution_failed_event():
     assert received_events[0].flow_name == "TestFlow"
     assert received_events[0].type == "method_execution_failed"
     assert received_events[0].error == error
+
+
+@pytest.mark.vcr(filter_headers=["authorization"])
+def test_llm_emits_call_started_event():
+    received_events = []
+
+    @crewai_event_bus.on(LLMCallStartedEvent)
+    def handle_llm_call_started(source, event):
+        received_events.append(event)
+
+    @crewai_event_bus.on(LLMCallCompletedEvent)
+    def handle_llm_call_completed(source, event):
+        received_events.append(event)
+
+    llm = LLM(model="gpt-4o-mini")
+    llm.call("Hello, how are you?")
+
+    assert len(received_events) == 2
+    assert received_events[0].type == "llm_call_started"
+    assert received_events[1].type == "llm_call_completed"
+
+
+@pytest.mark.vcr(filter_headers=["authorization"])
+def test_llm_emits_call_failed_event():
+    received_events = []
+
+    @crewai_event_bus.on(LLMCallFailedEvent)
+    def handle_llm_call_failed(source, event):
+        received_events.append(event)
+
+    error_message = "Simulated LLM call failure"
+    with patch("crewai.llm.litellm.completion", side_effect=Exception(error_message)):
+        llm = LLM(model="gpt-4o-mini")
+        with pytest.raises(Exception) as exc_info:
+            llm.call("Hello, how are you?")
+
+        assert str(exc_info.value) == error_message
+        assert len(received_events) == 1
+        assert received_events[0].type == "llm_call_failed"
+        assert received_events[0].error == error_message