Interfaces between teams beat shared Slack channels — note 115

I keep returning to a simple test: after a week of work on interfaces between teams beat shared slack channels — note 115, can someone outside the room explain what changed and who owns it?

When two teams disagree, treat the disagreement as a design input. Resolve it in the interface, not in personality.

The cheapest alignment tool is still a short doc with a decision and a date. Meetings are for conflict, not for status karaoke.

Sustainability shows up as fewer retries, right-sized environments, and CI that does not burn cycles for vanity. Efficiency is operational maturity.

Cross-team collaboration fails when interfaces are social instead of technical: Slack threads instead of contracts, heroes instead of owners.

Write the boundary as if it were an API: inputs, outputs, latency expectations, and who gets paged.

Mentorship scales when seniors narrate tradeoffs in writing. A one-paragraph decision record teaches more than a hallway conversation that evaporates.

On interfaces between teams beat shared slack channels — note 115, the leadership move is to make the invisible visible: ownership, verification, and the path for the next person.

Process should be light enough to change. If your AI workflow cannot be updated when a model, connector, or compliance rule changes, you do not have a workflow — you have a ritual.

I prefer written decisions over verbal ones. Memory is a poor archive, and AI tools make fluent improvisation cheap — which raises the value of durable context.

None of this requires a new framework brand. It requires attention, a short feedback loop, and the humility to change process when agents join the workflow.

The practical next step is small: pick one workflow, name an owner, and make the outcome observable next week.