Contract

• Input: problem description and inputs defined by the skill body.
• Output: Markdown artifact with completed process steps.
• Side effects: none.
• Dependencies: none.
• Stop condition: all process steps executed; artifact saved with required sections.
• Risk: low.
• Boundary: produces reasoning artifact only; no system changes.

Portfolio Optimisation

Build a portfolio from first principles — return model, risk model, objective, constraints — and solve for weights with explicit robustness checks.

When to use