For Architects
Technical designs grounded in product reality.
Foundation helps architects, staff engineers, and tech leads design systems visually and narratively—without losing sight of product intent.
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Architecture decisions made without product context lead to rework.
TDDs disconnected from PRDs become stale documentation that nobody trusts. Foundation keeps technical design connected to product intent—so constraints flow both ways.
Features
Everything architects need.
Mermaid Diagram Editor
Live preview, AI-assisted generation from written design
PRD to TDD Linking
Technical constraints flow back to product; requirements flow into architecture
Structured Sections
System overview, data model, API design, infrastructure, dependencies
Export Anywhere
Linear & Notion sync, Markdown for coding agents, PDF for stakeholders
Team Collaboration
Co-edit with engineers in real-time. Threaded comments for design discussions.
AI Agent API (MCP)
Let Claude, Cursor, and coding agents read your specs directly. No copy-paste.
Agent Instructions
Configure custom AI instructions for architecture-specific guidance
Copilot
Context-aware AI assistance while designing your TDD
Brainstorm to TDD
Brainstorm system architecture, then generate a structured TDD
Diagram-Ready Exports
Export diagrams in formats ready for presentations and documentation
Design your first TDD with full product context
Start with a template. Connect it to a PRD. Let your specs speak directly to Claude and Cursor.