Technology architecture - Document
Technical design
(TD)
A document describing in detail how a system or feature will be technically built
What's it for?
Turns an agreed solution into enough practical detail for developers and engineers to build it.
For example…
The technical design for self-serve password reset covers the email flow, token storage, audit logging, and which existing identity service is called
A TD for a payment feature specifies the API sequence, database changes, error handling and security controls developers should build
Think of it like…
Detailed architectural drawings for one room — dimensions and materials, not just a sketch of the whole house