Intro about Spec Driven Development

Transcript

1. Tommy Han, 2026 The Markdown Development Lifecycle Spec Driven Development
2. Before We Begin…
4. What is Spec?
6. What is the Difference? Spec vs Context Files • Glob a l vs Loc a l • Most people will think it is a “Product Requirements Document”. • But a ctu a lly it should be n a med a s beh a vior oriented a rtif a ct. Written in n a tur a l l a ngu a ge th a t express softw a re function a lity a nd serves a s guid a nce to AI coding a gents. • E a ch v a ri a nt of spec-driven development de f ines their a ppro a ch to a spec’s structure, level of det a il, a nd how these a rtif a cts a re org a nized within a project. • Context File: For these context, they a re mostly c a lled “memory b a nks”, for AI a gents to remember the b a ckground inform a tion of the project
7. 3 Levels of SDD
8. 3 Levels of Spec Driven Development 1. Spec-First (Behavior Description) • After c a pture the requirements of the fe a ture, you will st a rt to write det a ils • The spec f iles will include the det a ils on how to build the fe a tures • You h a ve to list out the t a sks, step by step, on how to a ccomplish. • The Spec will be diminished a fter the fe a ture is completed.
9. 3 Levels of Spec Driven Development 2. Spec-Anchored (Companion) • The Spec is kept, a fter the t a sk a s f inished. • It will be using continuously within the Evolution a nd M a int a inence
10. 3 Levels of Spec Driven Development 3. Spec-as-Source (Developement Source) • You don’t need to touch the code. • You a re only editing the spec a nd rel a ted M a rkdown Files •
12. Available Toolkit on the Market Kiro, Github Spec-Kit, Tassl
13. Demo
14. Possible Problems • De f inition Uncle a r • E ff ect of Use in Green f ield a nd Brown f ield codeb a ses is unknown • All a v a il a ble fr a mework is still Level 1 (only some p a rt a re Level 2 a nd 3) • Extr a E ff ort on con f irming both Specs content a nd the code gener a ted
15. Then what developers should choose? Just chat to agent should be good enough.
16. Why you are interested in?
17. Thank you!
18. Appendix • https://m a rtinfowler.com/ a rticles/exploring-gen- a i/sdd-3-tools.html • https://codespe a k.dev/