[MBL QA] failure exemplar — item shop, half-built 4th item (id 23417)

About this model

Taxonomy exemplar of the #1 residual build defect: the model built Item A/B/C buy+sell pipelines fully but forgot Buy_D/Sell_D, leaving 'Player Item D' with no producer (vertexDisabledBecauseInput). Open the Runtime Debugger after Play to see the badges.

This public Machinations diagram, “[MBL QA] failure exemplar — item shop, half-built 4th item (id 23417)”, was shared in the Machinations Community by Mihai Gheza (Developer). With 62 components it falls in the Complex band of the Community's size ranges: Simple is up to 20 components, Moderate up to 60 and Complex more than 60.

So far members have viewed it 3 times. It was created in July 2026 and last edited on August 3, 2026.

You can open the diagram in the Machinations app, press Play to watch how resources move through it, change its values to see how the system responds, or remix it to get an editable copy in your own My diagrams.