feat: Add ModelsLabImageGenerationTool for image generation

[adhikjoshi]

Summary

Adds ModelsLabImageGenerationTool — a CrewAI tool for generating images using ModelsLab's text-to-image API.

ModelsLab provides access to 200+ AI models (Flux, SDXL, Stable Diffusion, community fine-tunes) via a unified API, complementing the existing DallETool.

---

What this adds

File	Purpose
tools/modelslab_tool/modelslab_tool.py	Main tool class
tools/modelslab_tool/__init__.py	Module init
tools/modelslab_tool/README.md	Usage docs
tools/__init__.py	Export registration

---

Features

• Follows the same BaseTool pattern as DallETool
• Configurable model, width, height, inference steps, guidance, seed, negative prompt
• Automatic async polling for processing status responses
• Returns JSON with image_url, all_image_urls, model, and prompt

---

Usage

from crewai import Agent, Task, Crew
from crewai_tools import ModelsLabImageGenerationTool

image_tool = ModelsLabImageGenerationTool(
    model="flux",
    width=1024,
    height=1024,
    negative_prompt="blurry, low quality",
)

designer = Agent(
    role="Visual Designer",
    goal="Create stunning images",
    backstory="Expert visual designer.",
    tools=[image_tool],
)

task = Task(
    description="Generate an image of a futuristic city at night.",
    agent=designer,
    expected_output="URL to the generated image.",
)

crew = Crew(agents=[designer], tasks=[task])
result = crew.kickoff()

---

API Reference

• Docs: https://docs.modelslab.com/image-generation/community-models/text2img
• Get API key: https://modelslab.com/dashboard/api-keys
• Env var: MODELSLAB_API_KEY

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