Presheaf Topos

---
name: presheaf-topos
description: "Presheaves: contravariant Set-valued functors."
metadata:
  letter: P
  trit: -1
  seed: 1149
---
# P: Presheaf Topos

> *Presheaves: contravariant Set-valued functors.*

## Directory Tree

```
presheaf-topos/
├── SKILL.md
├── sieves/
├── yoneda-lemma.tex
```

## GF(3) Assignment

Letter P → trit = -1

## Integration

```scheme
(define (presheaf_topos x)
  ;; Presheaves: contravariant Set-valued functors.
  x)
```


---

## Autopoietic Marginalia

> **The interaction IS the skill improving itself.**

Every use of this skill is an opportunity for worlding:
- **MEMORY** (-1): Record what was learned
- **REMEMBERING** (0): Connect patterns to other skills  
- **WORLDING** (+1): Evolve the skill based on use



*Add Interaction Exemplars here as the skill is used.*