# Grammar of Stewardship — Overview

The Grammar of Stewardship is not a UI grammar, not a visual
language, not typography. It is the grammar governing how human
understanding is composed, preserved, and transferred. Every
experience across PosterityOS speaks this grammar.

## Founding belief

> Understanding has structure. Good stewardship preserves that
> structure.

## Where it sits

```text
PosterityOS Constitution   →  WHAT the system is
Human Stewardship Guides   →  HOW responsible people build it
Stewardship Pattern Lang.  →  WHICH recurring human situations recur
Grammar of Stewardship     →  the language every experience is composed from
Product Architecture       →  which compositions each product speaks
Implementation             →  how each product speaks them
```

## Foundation (v1.0, ratified 2026-07-13)

- **15 elements**: Purpose, Context, Invitation, Question,
  Perspective, Evidence, Rationale, Decision, Contribution,
  Reflection, Continuity, Memory, Understanding, Capability,
  Posterity.
- **6 ordering rules**: Purpose → Context → Understanding →
  Contribution → Decision → Continuity → Posterity.
- **6 composition invariants**: rationale beside decision, questions
  open understanding, memory is preserved understanding, continuity
  survives interruption, capability is the outcome, posterity is
  capability across time.
- **9 non-ordering relationships**: support / produces /
  belongs-with.
- **7 validation checks** for any composition.

## Constitutional guarantees

- Ratified elements and rules are frozen. Refinements land in the
  Grammar history log.
- Products may introduce new concepts; products may not contradict
  the grammar. Deviations require explicit constitutional
  justification recorded in history.
- No UI, code, or technology vocabulary appears anywhere.

## Location

- Modules: `src/platform/stewardship/grammar/`
- Tests: `src/test/stewardship-grammar.test.ts`
- Docs: `docs/hsg/grammar-*.md`