Skills

Eight things, not forty.

No skill bars, no fake percentages, and no long tail of things I touched once. The first two groups are eight tools I would be happy to be questioned on for an hour, sorted by what they are for rather than by vendor. Then what I am learning properly and am not claiming yet, and last the practices the case studies argue in full.

Data and isolation

PostgreSQLSQLSupabase (RLS)IndexedDB (offline sync)

Runtime and interface

TypeScriptNode.jsReact / Next.jsGit

Learning properly, not claiming yet

GoAWSOpenTelemetryDocker

Correctness and proof

Headless testingHand-rolled assertion harnessesDeterministic-first AI boundaries

Domain and data modelling

Double-entry accountingRow-level securityOffline-first syncMulti-tenant data modellingDatabase designREST APIs