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.

Commitment Design System (CDS). A way to design commitments that survive contact with reality – making explicit what teams 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: engagement, delivery, and value.

Tri-Contour Dynamics (TC). An analytical model for understanding resource allocation across competing structural demands. Published on Zenodo. The highest-rigor work in the ecosystem — used to stress-test and revisit other models.

System Design Lens (SDL). A meta-level lens for designing and critiquing systems — boundaries, assumptions, failure modes, and legitimacy.

HCS, CDS, and 3SF form a deliberate sequence for delivery. TC and SDL are analytical instruments that sit above and across that sequence.

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.