Instruments, not verdicts

A tool on this shelf has to pass the same bar as an essay: every number sourced or cut, no fake precision, and nothing that quietly decides for you. These are instruments — they show you the curve or take your inputs and hand the thinking back. What you conclude is yours.

And one rule inherited from the whole house: none of this is financial, medical, or career advice. A planner that takes your numbers is a way to think, not a verdict to obey.


The shelf

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