Gemini Writers Workshop

The Gemini Writers Workshop (/gemini-writers-workshop) is a multimodal ideation and prompt-engineering workbench. Creators can attach reference images, videos, or audio files alongside draft instructions, apply custom system personas, and save reusable PromptTemplate records to Firestore for use across the Studio.

Source Architecture

Layer	File Path	Responsibility
Mesop Page & State	pages/gemini_writers_workshop.py (WritersWorkshopState)	Prompt editor, system instruction panel, multimodal reference uploader, markdown output viewer, and template save/load dialogs.
Template Service	common/prompt_template_service.py (PromptTemplate, PromptTemplateService)	CRUD persistence layer storing categorized prompt templates in the Firestore prompt_templates collection.
Model Config	config/default.py (MODEL_ID)	Configures the default Gemini reasoning model (gemini-2.5-flash / gemini-3.5-flash).

Key Capabilities

1. Multimodal Context Grounding

• Users can upload or select from the Studio Library any combination of images, videos, or audio files (media_gcs_uri).
• The workshop attaches the media as a types.Part.from_uri(file_uri=..., mime_type=...) alongside the text prompt so Gemini can analyze visual composition, transcribe/critique audio, or write detailed shot-by-shot Veo/Nano Banana prompts grounded in the reference asset.

2. Custom System Instructions

• Users can customize the system_instruction passed into types.GenerateContentConfig to adopt specialized creative personas (e.g., Commercial Director, Fashion Copywriter, Cinematographer, or Technical Prompt Engineer).

3. Persistent PromptTemplate Library (common/prompt_template_service.py)

• Any refined prompt and system instruction pair can be saved to Firestore (prompt_templates collection) via PromptTemplateService with metadata including label, key, category, prompt_text, and attribution (user_email).
• Saved templates appear directly in the workshop’s template selector for one-click reuse across sessions.