01 / Engineering notes
Concrete engineering decisions behind real portfolio projects: the trust boundaries, failure modes, and implementation tradeoffs that do not fit into a project thumbnail.
An RFID scan identifies a card, not necessarily the person holding it. This case study examines how to keep verification, session policy, and persistence under one server-authoritative attendance decision.
A document system is more than a CRUD form. Finalization, revision, archival, authorization, and PDF output must all agree on the same record state.
A controller must not leave a trigger pressed because a packet was lost. NATSX Controller separates the touch surface, transport health, and Windows virtual-controller state.
Each note is linked to the public source repository and original project case study. The explanations reflect documented implementation scope, not invented benchmark figures or claims of universal compatibility.
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