How Cohort15 is testing small-group formation
The formation loop, manual experiments, and modest success criteria guiding the next phase of Cohort15.
Read on Cohort15 →Research & Field Notes
The thinking behind Cohort15.
Research, product observations, and working ideas about helping a few serious people reliably show up around a concrete goal.
The collection
Evidence, ideas, and progress.
Written work lives here. Product videos will include a useful written summary and a link to YouTube; selected external publications will be labeled clearly.
ResearchEssaysField notesProduct updatesExternal publications
Latest
Start with the evidence.
Introducing Cohort15: The original product thesis
The founder story, original mechanics, and early assumptions behind Cohort15—plus what changed in the validation MVP.
Read on Cohort15 →Why small, committed groups are worth building
A synthesis of 20 public requests for serious peers, recurring accountability, and groups designed around a concrete goal.
Read on Cohort15 →