A while back, I shared how I built a Custom GPT to help teams ship smaller, safer, faster. The goal was clear: challenge teams to focus on learning and delivering value in small, safe steps.
Since then, I've refined that original GPT and expanded the approach.
From broad to focused: eferro Lean Delivery
The original Custom GPT has evolved into eferro Lean Delivery. This version zeroes in on one thing: helping teams deliver value in the smallest, safest, most reversible steps possible — always with zero downtime and minimal risk.
Whether you’re planning a migration, thinking about a tricky rollout, or just trying to keep changes deployable at all times, eferro Lean Delivery is your partner in challenging assumptions and slicing work even thinner.
Check it out here: eferro Lean Delivery
New: eferro Lean Discovery
Alongside Delivery, I’ve created a new GPT: eferro Lean Discovery. This one is all about the upstream part of product work: ideation, problem framing, hypothesis creation, and finding the smallest meaningful experiments.
Where Delivery helps you move safely and incrementally once you start building, Discovery helps you figure out what’s really worth building in the first place. It asks you uncomfortable (but necessary) questions like:
- What problem are we really solving?
- What’s the smallest experiment to validate this idea?
- What signals are we looking for before investing further?
Try it here: eferro Lean Discovery
Where to find them
You can find both GPTs — eferro Lean Delivery and eferro Lean Discovery — in the GPT marketplace. Just search for eferro Lean, and you’ll see them there.
Both tools are built on the same spirit:
Software is about learning. The faster (and safer) we learn, the more impact we create.
No tracking, no hidden agendas — just simple tools to help teams focus on what matters: delivering value continuously, with confidence and calm.
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