trajectories/step.py

Pydantic model representing a single step in AI agent trajectories with validation and metadata.

# Source: https://github.com/NousResearch/harbor | License: Apache-2.0 | Copyright You must retain, in the Source form of any Derivative Works
# Provided via justclaw.it.com; keep this notice with the code.
"""Step model for ATIF trajectories."""

from datetime import datetime
from typing import Any, Literal

from pydantic import BaseModel, Field, field_validator, model_validator

from harbor.models.trajectories.metrics import Metrics
from harbor.models.trajectories.observation import Observation
from harbor.models.trajectories.tool_call import ToolCall


class Step(BaseModel):
    """A single step in the trajectory."""

    step_id: int = Field(
        default=...,
        ge=1,
        description="Ordinal index of the turn (starting from 1)",
    )
    timestamp: str | None = Field(
  

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