Tools that show their assumptions.
Three open-source tools, written for decisions taken only once. They aim to make life simpler for independent consultants — that is the scope for now, and it may widen. Each shows its assumptions and lets you change them: a result you cannot contradict is not a result.
These tools belong to no client engagement. They are developed separately, published openly, and commit no one else.
Salary / dividend trade-off for a French SASU, and corporate-tax instalments. The tax assumptions are shown and editable: a scoping tool, not tax advice.
Long-term wealth drawdown, calibrated for France and Japan. Two tax regimes inside one model, which makes visible what the jurisdiction actually changes.
What AI actually buys on a task: Amdahl’s law with a review term added. That term is the point of the model — it is what bounds the gain, not the speed of the model.