About 3in3.dev

3in3.dev is a personal systems studio. It grew out of decades working in software engineering and client–vendor projects – and seeing the same patterns repeat:

• Teams struggling with invisible cooperation problems.
• Discovery and delivery drifting because nobody can see the whole system.
• Frameworks being “applied” in name, while reality follows a different logic.

Instead of adding yet another method on top, I started building systems that help see what’s actually happening – and create shared language for it.

Human Cooperation System (HCS). A way to treat teams as cooperation systems with needs, conditions, and functions – not just roles and ceremonies. It gives structure to questions like “Why is trust low?” or “Why does this team feel stuck?”.

Commitment Design System (CDS). A way to design commitments that survive contact with reality – not just assumptions or promises. It helps teams make explicit what they think they’ve agreed to, and what the system can actually support.

3-in-3 SDLC Framework (3SF). A delivery framework focused on the relationships between client, vendor, and product: how engagement is set up, how delivery is run, and how value is measured and fed back into decisions.

Together, they create a bridge between human dynamics and software delivery reality.

3in3.dev is where I:

• Publish documentation for each system.
• Experiment with formats – from written guides to custom GPTs.
• Capture learning from real projects and feed it back into the frameworks.

Over time, this will include more examples, case-inspired patterns, and tools built on top of HCS, CDS, and 3SF.