add agents.md for AI agent integration

agents.md

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+---
+name: ImageStudio
+description: >-
+  ZeroGPU-powered image generation Space with Anime and Realistic models.
+  Supports NSFW content without restrictions. Exposes tools via Gradio MCP
+  for AI agents to generate, moderate, and transform images.
+urls:
+  - https://exched-imagestudio.hf.space
+---
+
+# ImageStudio by Exched
+
+Image generation Space powered by ZeroGPU (NVIDIA A10G). Supports two model
+families and full NSFW content.
+
+## Tools (Gradio MCP)
+
+The Space exposes the following tools via its MCP endpoint at
+`/gradio_api/mcp/`:
+
+### `generate_and_upload`
+Generate an image from a text prompt.
+
+**Parameters:**
+- `model_name`: `"Anime"` or `"Realistic"`
+- `prompt`: Text prompt (name-first, comma-tag style recommended)
+- `negative_prompt`: What to avoid
+- `width` / `height`: Resolution (default 1024)
+- `num_inference_steps`: 24 (Anime) or configurable
+- `seed`: For reproducibility (42 = randomize)
+- `randomize_seed`: true/false
+
+### `apply_model_defaults`
+Reset sliders and negative prompt defaults for the selected model.
+
+### `assistant_chat`
+VLM-powered chat about an uploaded image.
+
+### `moderate_image`
+Run the safety guard on an image (informational only, does not block).
+
+## Usage Notes
+
+- **Prompt style**: Name-first, comma-separated tags works best.
+  Example: `hu tao from genshin impact, naked, on bed, red lighting`
+- **NSFW**: Fully supported. Use `naked` / explicit tags as needed.
+- **ZeroGPU quota**: Daily reset per IP. Authenticated HF users get higher priority.
+- **Custom checkpoints**: Checkpoints loaded from `exched/checkpoint_n_lora` dataset.