Multi-Tenant Platform in 2 Days
Context
A complete multi-tenant SaaS platform: authentication, organization management, data isolation, billing, admin dashboard.
With a classic team and Scrum: planning, sprints, code reviews, QA… realistic estimate of 10-14 months.
The MADD Approach
Spec Agent (Gemini)
Roadmap, Intention Documents, foundation prioritization
Dev Agent (Opus)
Contract-guided implementation
Audit Agent (GPT)
Due diligence on each delivery
What Made the Difference
- Foundations first — Multi-tenant isolation was implemented before any feature. No “we’ll see later”.
- Executable contracts — Every requirement had tests. The Dev Agent couldn’t “cheat”.
- Independent audit — GPT detected 3 security flaws that the Dev Agent had missed.
- No hidden debt — The retro-spec documented 12 technical limitations from the start.
Frictions Encountered
- Gemini had outdated knowledge about Next.js 14 → Delta skills needed
- Opus tended to over-engineer → Explicit constraints in the Development Skill
- The Scribe was initially the Dev Agent itself → Bias detected, separation enforced
Measurable Results
- Time: 2 days vs 12 months estimated (x180)
- Production bugs: 2 minor in 3 weeks
- Technical debt: 12 items identified and documented (vs discovered along the way)
- Test coverage: 78% (vs target 70%)
Other Case Studies
More case studies are in preparation:
Legacy Migration
Rewriting a monolithic PHP application to Next.js with MADD. How retro-specs ensured nothing was forgotten.
COMING SOON
Distributed Team
Applying MADD in a 5-person team across 3 time zones. Roles, coordination, tools.
COMING SOON
Startup MVP
From idea to MVP in 1 week. How MADD enables rapid validation without accumulating debt.
COMING SOON
Share Your Experience
Have you applied MADD on a project? Share your feedback:
- GitHub Discussions — For detailed feedback
- Pull Request — To contribute a complete case study
- Issues — To report friction or propose improvements
Failures are as valuable as successes. What didn’t work interests us just as much.