What Is an Investment Schema?

Short answer: An investment schema (invest.md / INVEST.md) is the structured judgment system inside an Investor Skill. YAML tokens are the normative parameters (signals, filters, sizing, risk). Markdown prose is how to apply them. Spec: docs/spec.md.

Why it exists

Most investing content is passive. The useful part is operational: what they notice, what they ignore, what makes them act. The schema extracts that into something an agent can lint and a human can audit.

It is the finance analogue of DESIGN.md: signals ≈ colors, filters ≈ type rules, playbooks ≈ components.

Token groups

Token	Job
Signals	What to watch and how hard
Filters	Hard pass / reject gates
Sizing	How much
Risk	Drawdown, stops, margin of safety
Universe	What the model may even look at
Market regime	When the model is in-regime
Decision cadence	How often to reassess
Playbooks	Named decision templates
Circle of competence	Domains it covers

This schema is the skill’s identity file. The harness-level invest.md (trader DNA) is the same idea at the person / Fund layer — see What is invest.md?.

Related: What is an Investor Skill?

Nothing here is financial advice.