From software to Self-Ware: beyond the one-prompt miracle

AI coding agents have unlocked "Software for One" (Self-Ware): bespoke apps built by one engineer for an audience of one.

Presented at the Agentic Coding Meetup in Hamburg, this deck tells the story of building LimeLight (the native macOS presentation app running this very talk). I walk through why chasing the "one-prompt miracle" fails even when you have a full PRD, AGENTS.md, skills, and 26,500 lines of green tests, and how iterative engineering spikes combined with Systems Design, Taste, and Grit actually ship real software with coding agents.

Transcript

1. Agentic Coding Meetup · Hamburg From Software to Self-Ware Beyond the One-Prompt Miracle Peter Friese · Google @peterfriese
2. Software Dinner for One @peterfriese
3. peterfriese.dev @peterfriese
4. Yesterday: The 10x Engineer Today: The x/10 Engineer 10 Engineers 10,000 Users 1 Engineer 1 User @peterfriese
5. 1. Idea Audience of One 2. Prompt Self-Ware Pipeline AI Studio · Stitch · Claude 3. App Native Self-Ware @peterfriese
6. @peterfriese
7. @peterfriese
8. @peterfriese
9. @peterfriese
10. Features @peterfriese
11. let model = FirebaseAI.firebaseAI(backend: .vertexAI(location: "global")).geminiLanguageModel( name: "gemini-3.1-flash-lite", serverTools: [.googleMaps()] ) let session = LanguageModelSession( model: model, instructions: Instructions { "Use Google Maps to find real places in Hamburg." } ) let response = try await session.respond( to: "Where can I get great Franzbrötchen in Hamburg?", generating: BakeryRecommendation.self ) @peterfriese
12. @peterfriese
13. OSC ILL ATO R B ANK MIX ER FIL C5 LOA TER 523 SAW D TC W PI 2.2 SAW / S COP .3 E Hz MOD H K IFI E · ERS MO D 2.2 A T S Y K D U F MO ARP DE L G D71 AI O H P · J MO NO PH K ON ON IC ] AN L AL B OG ; SY N NT ' HE SI ZE Z R X C V AI @peterfriese MA ES TR O · GE MI NI + TT S
14. Behind the Scenes @peterfriese
15. e b o d A e l o h "The w e n o n i e t i u Creative S prompt?!" @peterfriese
16. The Vibe Coding Escalation Trap Why chasing the one-prompt miracle hits a wall 1. Vibe Coding 2. Giant AGENTS.md 3. Skill Sprawl 4. Bigger Model Toy apps only Half gets ignored 45+ skills, no cra! Burn 10x more tokens @peterfriese
17. My Day-1 One-Shot Attempt Full PRD + `AGENTS.md` + Skills + `/goal` Session 1 Transcript (Oct 9, 2026) I want to build an app that helps me create animated slide decks, like Keynote... Keep in mind that the main app is a native (!!!!!!! NO ELECTRON OR OTHER SHIT !!!!!!!) app... UI must be clean, following Apple best practices, and absolutely LICKABLE. They must be as if the best UX designers and engineers at Apple had worked on them. Peter: "Is the spec good enough to implement ALL of this?" Agent: "Yes. The specification is 100% implementation-ready." Peter: "Are you confident?" Agent: "100% confident." Peter: "/goal implement this app completely." @peterfriese
18. 26,500 Lines of Swift 100% Passing Tests @peterfriese
19. The Agent Said "Done." @peterfriese
20. @peterfriese
21. 0 0 F F 6 C # e v i Radioact r e n r o c g n lime + wro radius! @peterfriese
22. s i l l e h h s e r "What f this?!" @peterfriese
23. How I Actually Built It Spikes ScreenCaptureKit Window & iPhone 1080p canvas & r ro m e i to Ed Ma r St ud io Ch wn OL kd o Te le St UI ift Sw ED ag e pr om pt Ca 60 fp sL ive e ag LimeLight 1.0 W eb St spikes pt ur e Thrown away! & stage timer Merged into er hand-drawn callouts Presenter display 2 competing UX Spike 1 Spike 2 Spike 3 Spike 4 Spike 5a & 5b Spike 6 @peterfriese
24. Systems Design. @peterfriese
25. Taste. @peterfriese
26. Grit. @peterfriese
27. One More Thing... @peterfriese
28. P C M h t i w w o N @peterfriese
29. Thanks. @peterfriese
30. Thanks. @peterfriese @peterfriese