Most teams build too much, too early, with too much anxiety. They optimize for perfect architecture before users, comprehensive features before learning, elaborate processes before understanding real constraints.
The result? Endless discussions, delayed releases, building the wrong thing.
So I built: 👉 eferro Lean – your no-BS delivery copilot
A Custom GPT that works with any product development artifact—PRDs, tickets, code reviews, roadmaps, architecture docs—and asks the uncomfortable, helpful questions:
- "What's the smallest shippable version?"
- "Do we actually need this complexity right now?"
- "What if we postponed this decision?"
- "How can we make this change in smaller, safer steps?"
Perfect for anyone building products: developers, PMs, designers, architects, team leads.
Use it to:
- Slice big ideas into vertical experiments and safe technical steps
- Plan parallel changes, expand-and-contract migrations, or branch-by-abstraction
- Challenge bloated PRDs or over-engineered solutions
- Turn risky releases into incremental, reversible deployments
It challenges assumptions, slices features into experiments, and guides you toward the last responsible moment for decisions. Questions that create momentum instead of paralysis.
Software is a learning exercise. Every feature is an experiment. The faster we test hypotheses safely, the faster we learn what creates value.
No tracking, no upsell, no agenda. My only intention is to share what I've learned and keep learning from the community.
If it helps one team ship better—with less stress, more learning—that's enough.