Clarity before code.

Start with a brainstorm and end with production-ready documents. Foundation is the structured workspace where product and engineering think together, before code exists.

A structured workspace for product requirements documents and technical design documents — with spec context for AI coding agents.

Brainstorm ideas into structured PRDsCopilot: section-aware AI with streaming responsesAutosave & full undo historyIndustry-tested PRD templatesProduction-ready PRDs & TDDs with live linkingReal-time collaboration with comments and @mentionsExport to Linear, Notion, Jira, PDF, and more
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What Makes Foundation Different

Clarity before code.

A structured workspace for PRDs and TDDs
AI-assisted writing with human control
Deterministic validation via rules engine
Export-ready professional documents
A brainstorming-to-production pipeline
AI that understands your document context
Not a project management tool
Not autopilot — AI assists, you decide
Not a wiki or knowledge base
Not a Jira/Linear replacement

Speed without design is how bad software scales.

AI coding tools have removed friction from implementation—but not from thinking. Teams rush into development with vague requirements and undocumented tradeoffs.

Foundation gives you Brainstorm to explore ideas, Copilot to refine them, and structured templates that keep PRDs and TDDs in sync— so you think clearly before code hardens around bad decisions.

Features

Designed once. Executed everywhere.

Foundation fits into existing workflows without forcing lock-in. Export to multiple formats with professional styling.

01

Skip the blank page. Start with proven structures.

Choose from industry-tested PRD templates designed for SaaS products, mobile apps, APIs, AI products, and more. Start from a template, brainstorm with AI, and generate complete documents. Access community templates from the marketplace.

  • PRD templates for SaaS, mobile, API, AI products
  • Architecture patterns and system design scaffolding
  • Pre-defined sections with smart defaults
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02

PRDs engineering actually trusts.

Foundation guides product and technical leaders through structured requirement design—surfacing assumptions, constraints, risks, and edge cases early.

Every requirement links directly to technical decisions and constraints.

  • Brainstorm-to-PRD flow
  • User flow diagrams (Mermaid)
  • Copilot assistance
  • Clear scope, assumptions, and constraints
Build a PRD
03

TDDs that reference the PRD—not replace it.

Foundation enables architects and senior engineers to design systems visually and narratively—without disconnecting architecture from product intent.

  • Mermaid diagram editor with live preview
  • Auto-generate diagrams from Brainstorm sessions
  • Generate technical narratives from diagrams
  • Copilot for TDD-specific guidance
  • Tradeoffs, risks, and rollout plans
Build a TDD
04

Product intent and technical reality—kept in sync.

In Foundation, PRDs and technical designs are not isolated artifacts. Linked documents share brainstorm context—ideas flow between product and technical planning.

Product → Architecture

Product context informs architecture. Requirements flow into technical decisions automatically.

Architecture → Product

Technical constraints flow back into product decisions. No surprises during implementation.

AI uses the full design context to assist intelligently—while humans stay firmly in control.

05

AI-Powered Workspace

Start with a brainstorm, ship a production-ready PRD.

  • BrainstormUpload files, whiteboard images, or voice notes. Foundation extracts Mermaid diagrams and seeds your PRD automatically.
  • CopilotSection-aware chat that knows which part of your document you're editing. Ask questions, refine wording, or get suggestions — in context.
  • Agent InstructionsDefine reusable instruction templates that shape how AI responds across your team. Consistent tone, consistent output.
  • MCP / Agent APIExpose PRDs and TDDs to Claude Code, Cursor, Windsurf, or any MCP-compatible tool. No copy-pasting requirements into your IDE.

AI assists. You decide.

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06

Real-Time Collaboration

Your whole team, on the same page.

PRDs aren't solo documents. Foundation lets product managers, engineers, and architects collaborate in real-time—with presence indicators, inline comments, and @mentions that keep everyone aligned.

See who's viewing and editing in real-time

Leave inline comments on any section

@mention teammates to request input or approval

Threaded discussions with resolution tracking

Share documents externally with password protection

Assign team roles—owner, editor, or viewer

05

Export Formats

Foundation fits into existing workflows without forcing lock-in. Professional styling for every stakeholder. All exports include professional styling with diagrams rendered and formatted for each target platform. Share with stakeholders directly or distribute through your preferred channels.

PDF

Diagram-ready exports, rendered as actual images

DOCX

Professional documents with table formatting

Markdown

For coding agents, GitHub, and repositories

CSV

Structured data for spreadsheets and analysis

AI assists. You decide.

AI reviews, challenges, and fills gaps—never replaces your judgment
AI suggestions are explicit and editable
No silent rewriting or hidden changes
Designed to surface ambiguity—not hide it
Autosave & undo history—your work is never lost
Full version history—know who changed what, when
Compare versions side-by-side
Restore any snapshot

Design once. Execute with confidence.

From brainstorm to PRD to TDD—design software with intention.

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