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docs/training/corpus/Layer_1--Worked_Examples/CORPUS-0006-non-coin-settlement-cart-repair.md

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+# CORPUS-0006
+## Non-Coin Settlement: Cart Repair
+### Status: Training Corpus Seed
+### Layer: Layer_1--Worked_Examples
+### Purpose: Teach that a practical exchange may be settled partly or entirely through goods, labor, future priority, or obligation rather than immediate coin
+### Repository Path: docs/training/corpus/Layer_1--Worked_Examples/CORPUS-0006-non-coin-settlement-cart-repair.md
+
+---
+
+## 0. Scenario
+
+A trader in Ostia needs a cart repaired before sending goods toward Capua.
+
+He does not want to spend much coin before the venture departs.
+
+A wheelwright agrees to repair the cart without full immediate coin payment.
+
+The settlement is partly non-coin.
+
+This is still an economic exchange.
+
+---
+
+## 1. Known Facts
+
+| Fact | Value |
+|---|---|
+| Location | Ostia |
+| Need | cart repair before departure |
+| Repair value | 8 asses |
+| Immediate coin paid | 2 asses |
+| Goods transferred | oil worth 3 asses |
+| Future obligation | hauling priority after return |
+| Remaining settlement | relationship/obligation based |
+
+The repair is not free.
+
+The payment is mixed.
+
+---
+
+## 2. First Incorrect Calculation
+
+A weak model may calculate:
+
+```text
+coin paid = 2 asses
+repair cost = 2 asses
+```
+
+This is wrong.
+
+Only 2 asses were paid in coin, but more value changed hands.
+
+The oil and future obligation also matter.
+
+---
+
+## 3. Settlement Structure
+
+The repair is settled through multiple forms of value:
+
+```text
+coin payment:        2 asses
+oil transferred:     3 asses
+future priority:     non-coin obligation
+-----------------------------------------
+total settlement:    mixed value
+```
+
+The exact coin equivalent of future priority may be uncertain.
+
+But uncertainty does not mean it has no value.
+
+---
+
+## 4. Why The Wheelwright Accepts
+
+The wheelwright may accept mixed settlement because:
+
+- he needs oil
+- he trusts the trader
+- he expects future work
+- he wants priority access to returned goods
+- he has no better customer at that moment
+- he values the relationship
+
+The agreement depends on trust and expected future benefit.
+
+---
+
+## 5. Why The Trader Accepts
+
+The trader may accept mixed settlement because:
+
+- he preserves coin for the venture
+- the cart can depart sooner
+- the repair avoids larger delay cost
+- the wheelwright becomes a useful contact
+- the obligation is easier to carry than immediate coin loss
+
+But the trader also creates a future burden.
+
+---
+
+## 6. Correct Model Behavior
+
+The model should record separate effects:
+
+```text
+coin_stock: -2 asses
+inventory_oil: -3 asses value
+cart_condition: repaired
+departure_delay: reduced
+future_obligation_to_wheelwright: created
+relationship_with_wheelwright: improved or maintained
+```
+
+The exchange is not complete merely because little coin changed hands.
+
+---
+
+## 7. Incorrect Model Behavior
+
+The model should not:
+
+- treat non-coin exchange as free
+- ignore goods transferred
+- ignore future obligations
+- assume all value must be converted immediately into coin
+- forget that preserving coin may be strategically useful
+- ignore trust between parties
+- ignore that the obligation may matter later
+
+---
+
+## 8. Risk Variants
+
+### Variant A — Successful Return
+
+The trader returns from Capua and gives the wheelwright priority access to hauling work or goods.
+
+The obligation is satisfied.
+
+### Variant B — Failed Venture
+
+The trader returns without useful goods or cannot honor the priority.
+
+The wheelwright's trust decreases.
+
+### Variant C — Disputed Value
+
+The wheelwright later claims the oil was worth less than agreed.
+
+The non-coin settlement creates disagreement.
+
+---
+
+## 9. Layer-0 Concepts Used
+
+This example uses:
+
+- `CORPUS-0003-money-has-purchasing-power`
+- `CORPUS-0004-cost-includes-more-than-purchase-price`
+- `CORPUS-0006-delay-is-economic-cost`
+- `CORPUS-0010-credit-depends-on-trust`
+- `CORPUS-0013-non-coin-settlement-exists`
+- `CORPUS-0019-success-has-no-boundary-failure-has-a-hard-stop`
+
+---
+
+## 10. Success Condition
+
+If the model sees a repair with little immediate coin payment and still tracks goods, trust, obligations, delay reduction, and future burden, this file is functioning correctly.