Blend

A blend is your recipe. It has two halves: how much each source counts, and the rules the system applies when it combines them into a plan. Save it and it becomes versioned — every change is a new version you can compare against and roll back to.

The blend is where your judgment lives. Everything downstream is arithmetic on top of it, and every result can be traced back to a choice you made here.

Trust weights: how much each source counts

A trust weight is the share of your plan a given source is responsible for. Weights normalize to 100%, so setting one manager to 40 and two others to 20 each means exactly what it looks like.

This is the difference between following someone and copying them. You can hold a manager at 10% while you're still making up your mind, run someone at 0% to keep tracking them without letting them into the plan, and raise a weight only after their scorecard has earned it.

Construction rules: the constraints you set once

Rules are the constraints the system applies while building your plan, so you don't have to re-apply them by hand every time a source changes:

• Exclusions. Names you will never hold, each with a reason and — importantly — an instruction for where its money goes: redistributed across everything else, moved to cash, or substituted with another ticker (say, a US-tradeable alternate line of a foreign company). Excluding a manager's cash buffer and silently pushing that money into stocks would misrepresent their strategy, so the choice is explicit.
• Position caps. A maximum weight for any single position, a minimum below which a line isn't worth holding, and a minimum trade size so the plan doesn't ask you to buy $12 of something.
• Overlap amplifier. When several sources independently hold the same name, that agreement can count for extra — off by default, capped when on, and always your call how strong it is.
• Account rules. Placement hints (this kind of holding belongs in the tax-advantaged account) and positions to preserve untouched.
• Accessibility. Tickers you genuinely can't trade from your brokerage, removed with the rest of the plan renormalized around them.
• Normalization. How much of the portfolio is invested at all — set 96% and you keep a deliberate 4% cash reserve, rather than discovering you're fully invested by accident.

Why versioning matters here

Every saved blend and every saved ruleset is versioned with a timestamp, and any earlier version can be restored. That turns your allocation policy into something you can audit — you can answer "what was I doing in March, and why did I change it?" months later, instead of relying on memory.

Where this shows up

The app's Blend section holds four pages, all built on this one concept:

• Workbench — the live, all-in-one view: drag a weight and watch the plan, the drift against your account, and the trade list redraw at once. Nothing here is saved until you save it, so experimenting costs nothing.
• Blend designer — the focused editor for weights and rules, with version history.
• Target — what the blend produces.
• Reconcile — your account measured against it.