“The Event Taxonomy Atelier forced us to retire three ‘signup’ events that had been quietly double-counting since 2022. Finance noticed before marketing did.”
Studio notes · Volume IV · North Sunderland
Product analytics taught as a discipline of attention, not a dashboard tour.
Layer Kernelcore works with practitioners who already ship software and still cannot explain why week-one retention moved. We teach App Analytics as a written practice: name the event, defend the cohort, and leave a ledger someone else can audit.
Open the Cohort Retention Studio syllabus →
73practitioners in the last closed intake
4.2mean from 58 written letters, not star widgets
11live modules across the atelier year
2019first Northumberland reading group
From the letter drawer
What people actually used after the last sitting
“Cohort Retention Studio is careful work. Week 4 assumed more SQL fluency than the prospectus implied; I spent a Sunday on JOIN hygiene that a primer would have saved. The decaying-cohort notebook, however, is still open on my desk.”
Programmes
Five rooms, one craft
Cohort Retention Studio
Hold a cohort still long enough to see whether the product actually keeps people, or only appears to.
Syllabus
Event Taxonomy Atelier
A naming convention that survives a reorg, a vendor swap, and a tired Friday deploy.
Overview
Funnel Integrity Intensive
Find the silent drop that looks like a conversion because two steps share a name.
Overview
How the studio teaches
We mark ledgers, not slide decks.
Each sitting begins with a property you already ship. You bring a raw export, a confused board slide, or a tracking plan that nobody defends. Tutors annotate in the margin: which event is a fact, which is a hope, and which should never have been billed as a conversion.
- Written critiques returned within five working days of each assignment.
- Office hours by appointment, not an always-on chat that pretends to be mentoring.
- United Kingdom case material — grocery delivery, media, and public-service apps — not Californian folklore.
A fragment from the file
Grocery delivery, north of the Tyne
A client in grocery delivery arrived with a “healthy” D7 that collapsed once we split new versus returning shoppers. The Mobile Session Diagnostics notes from that month are now a set piece in the atelier: crash-free sessions had been high, while the order-confirm event fired on a screen users never reached after a payment retry. The full account sits on the letters page.
Open the case notes →The Kernel
Recent studio writing
Naming events that survive a reorg
A vocabulary for properties that outlast the team who invented them.
Why retention curves flatten on day three
The quiet mix of onboarding debt and a cohort you should never have combined.
Enrolment
Write before you book a seat.
Tell us which property you measure and where the numbers currently embarrass you. We reply within two working days and will not invent urgency around remaining places.