fsd-writer

To generate a functional specification document from rough ideas, provide your initial project description to the agent, which converts it into a structured Markdown FSD covering functional and non-functional requirements, phases, and verification.

You can update an existing functional specification document using delta-based evolution, which allows you to integrate new requirements into your current FSD while maintaining traceability across the project lifecycle.

Capturing risks and dependencies for IoT projects is handled automatically during FSD generation, ensuring your structured requirements include comprehensive risk, assumption, and dependency tracking for hybrid hardware and software systems.

This tool works for embedded systems and energy systems documentation, applying domain-specific logic to generate structured functional specifications across IoT, backend, mobile, SDR, and hybrid hardware/software environments.

The best way to ensure traceability in a functional specification document is to use deterministic Markdown generation, which structures your requirements, phases, and verification criteria into an agent-consumable format with built-in evolution tracking.

Your FSD needs both functional and non-functional requirements to create a buildable specification, ensuring that project capabilities, performance constraints, risks, and verification criteria are fully defined for staged development.