Mistral Prompt for Creating a Software Architecture
Mistral, the leading French AI model, excels in designing software architectures thanks to its deep understanding of design patterns and technical constraints. Whether you're starting a new project or restructuring an existing application, Mistral can help you define a solid, scalable, and maintainable architecture. By providing a well-structured prompt, you will get detailed recommendations on architectural pattern choices, separation of concerns, appropriate technologies, and inter-service communication strategies. The AI analyzes your business, technical, and organizational constraints to propose a coherent architecture that anticipates future changes. This guide provides optimized prompts to get the most out of Mistral for creating software architectures, from modular monoliths to microservices, as well as event-driven and hexagonal architectures. Each prompt is designed to produce deliverables that can be immediately used by your development team.
Paste in your AI
Paste this prompt in ChatGPT, Claude or Gemini and customize the variables in brackets.
Act as a senior software architect with 15 years of experience. I am developing a project with the following characteristics:
- Business domain: [describe your domain, e.g., B2B e-commerce platform]
- Expected users: [number and type of users]
- Technical constraints: [existing stack, hosting, budget]
- Non-functional requirements: [performance, availability, security]
Design a complete software architecture following this structure:
- Overview: Textual diagram of the overall architecture with main components and their interactions
- Architectural pattern: Justify the choice of pattern (hexagonal, microservices, modular monolith, CQRS, event-driven...) based on constraints
- Module/service breakdown: List each module with its responsibilities, public interfaces, and dependencies
- Application layers: Detail the separation of layers (presentation, application, domain, infrastructure) with dependency rules
- Data strategy: Simplified data model, database selection, caching and synchronization strategy
- Inter-service communication: Protocols (REST, gRPC, events), resilience patterns (circuit breaker, retry, fallback)
- Cross-cutting concerns: Authentication, logging, monitoring, CI/CD, error handling
- Evolution plan: How this architecture can evolve over 12-24 months
For each decision, indicate the alternatives considered and why they were discarded. Provide code examples for key interfaces.
Personalize this prompt with LĂ©a
Answer 3 questions and LĂ©a tailors the prompt to your situation.
Why this prompt works
This prompt works because it assigns a precise expert role to Mistral, activating its most advanced knowledge in software architecture. The 8-section structure forces a comprehensive and organized response, avoiding superficial answers. Asking for justification of alternatives pushes the model to comparative reasoning, producing more nuanced and contextualized recommendations.
Use Cases
Variants
Expected Output
You will receive a complete architecture document including a textual diagram of the architecture, details of each component with its responsibilities and interfaces, and justified technology recommendations. The result includes code examples for critical interfaces and an evolution plan, all directly usable as a basis for an ADR (Architecture Decision Record) or a technical specification document.
Frequently Asked Questions
Can Mistral generate actionable architecture diagrams?
Mistral doesn't directly generate images, but it can produce diagrams using textual notations (Mermaid, PlantUML, ASCII art) which you can then convert into visual diagrams. Explicitly ask for the desired format, for example: "Generate the diagram in Mermaid syntax." You can then paste the code into a tool like mermaid.live or embed it directly into your Markdown documentation. For C4 views, Structurizr DSL is also an effective output format.
How should I adapt the prompt if my project already uses a mandatory tech stack?
Explicitly list the technological constraints in the dedicated section of the prompt: frameworks, languages, databases, cloud services, and tools already in place. Add a line like "You must work with these technologies; do not suggest replacing them unless it is critical." Mistral will then adapt its architectural recommendations to the existing technologies rather than starting from scratch. If some components are negotiable, specify that to receive relevant alternatives.
Which version of Mistral is recommended for software architecture design?
For software architecture design, prefer Mistral Large, which offers the most advanced reasoning capabilities—essential for analyzing complex constraints and producing coherent recommendations. Mistral Medium is suitable for simple to intermediate architectures. Avoid Mistral Small for this type of task, as the depth of reasoning required to compare architectural patterns and anticipate long-term impacts demands a more powerful model. If you are using the Le Chat platform, select the Large model in the settings.
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