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+# DIALOGUE-0001
+## Oil At Ostia And Capua
+### Status: Training Corpus Seed
+### Layer: Layer_4--Dialogues
+### Purpose: Teach through in-world speech that trade depends on place, movement cost, delay, rumor, and rival action
+### Repository Path: docs/training/corpus/Layer_4--Dialogues/DIALOGUE-0001-oil-at-ostia-and-capua.md
+
+---
+
+<!-- chunk:
+id: DIALOGUE-0001::01::ostia_quay_report
+source_file: DIALOGUE-0001-oil-at-ostia-and-capua.md
+repository_path: docs/training/corpus/Layer_4--Dialogues/DIALOGUE-0001-oil-at-ostia-and-capua.md
+domain: commerce
+layer: Layer_4--Dialogues
+document_id: DIALOGUE-0001
+document_title: "Oil At Ostia And Capua"
+section_heading: Ostia Quay Report
+chunk_role: dialogue_beat
+concept_tags:
+  - local_price
+  - information_delay
+  - route_trade
+knowledge_state:
+  - actor_visible
+  - reported
+speakers:
+  - Felix
+  - Chresimus
+  - Secundus
+scene_location: Ostia quay
+scene_signal: merchant report of higher oil price in Capua
+demonstrated_concepts:
+  - local_price
+  - reported_price
+  - information_delay
+-->
+## Ostia Quay Report
+
+At Ostia, near the jars set beneath a striped awning, Felix listened while a muleteer from the Appian road drank watered wine and complained of the dust.
+
+“They paid fourteen asses for a jar in Capua three days ago,” the muleteer said. “Not fine oil. Common oil. The kind a cook curses and still buys.”
+
+Felix turned to Chresimus. “Here the same jar can be had for ten.”
+
+Chresimus did not look up from his wax tablet. “The same jar, yes. Not the same place.”
+
+Secundus, who had been judging the wheels of a loaded cart, spat aside. “And not the same road. A jar in Ostia is a jar under your hand. A jar in Capua is a jar after mules, drivers, rain, tolls, and broken axles have finished with it.”
+
+Felix smiled. “Still, four asses between here and there.”
+
+“Four asses spoken by a thirsty man,” Chresimus said. “Useful, but not silver.”
+
+“Enough to make me ask what carts are idle,” Felix said.
+<!-- /chunk -->
+
+<!-- chunk:
+id: DIALOGUE-0001::02::cart_cost_and_delay
+source_file: DIALOGUE-0001-oil-at-ostia-and-capua.md
+repository_path: docs/training/corpus/Layer_4--Dialogues/DIALOGUE-0001-oil-at-ostia-and-capua.md
+domain: commerce
+layer: Layer_4--Dialogues
+document_id: DIALOGUE-0001
+document_title: "Oil At Ostia And Capua"
+section_heading: Cart Cost And Delay
+chunk_role: dialogue_beat
+concept_tags:
+  - transport_cost
+  - delay_cost
+  - profit_arithmetic
+knowledge_state:
+  - actor_visible
+  - inferred
+speakers:
+  - Felix
+  - Secundus
+  - Chresimus
+scene_location: Ostia cart yard
+scene_signal: available cart with stated hire cost and travel delay
+demonstrated_concepts:
+  - movement_cost
+  - time_between_decision_and_result
+  - profit_arithmetic
+-->
+## Cart Cost And Delay
+
+In the cart yard, Secundus put one hand on the pole of a two-mule cart and shook it until the harness rings clicked.
+
+“This one can leave before sundown. Six asses for the cart and driver to Capua. Two more if you want the jars watched at night instead of left under a cloak.”
+
+Felix counted on his fingers. “Ten to buy, six to move, two to keep thieves from drinking my profit.”
+
+“Eighteen before you sell,” Chresimus said.
+
+Felix frowned. “That cannot be right. I heard fourteen in Capua.”
+
+“For one jar,” Chresimus said. “Your cart carries more than one jar.”
+
+Secundus laughed. “If you count like that, you will be poor before the mules are fed.”
+
+Felix waved him off. “Ten jars then. One hundred asses to buy. Eight asses for cart and guard. One hundred and eight laid out.”
+
+“And if Capua still pays fourteen?” Chresimus asked.
+
+“One hundred and forty back,” Felix said. “Thirty-two above the outlay.”
+
+“If the road keeps its promise,” Secundus said. “Roads are poor oath-keepers.”
+<!-- /chunk -->
+
+<!-- chunk:
+id: DIALOGUE-0001::03::varro_refuses_easy_counting
+source_file: DIALOGUE-0001-oil-at-ostia-and-capua.md
+repository_path: docs/training/corpus/Layer_4--Dialogues/DIALOGUE-0001-oil-at-ostia-and-capua.md
+domain: commerce
+layer: Layer_4--Dialogues
+document_id: DIALOGUE-0001
+document_title: "Oil At Ostia And Capua"
+section_heading: Varro Refuses Easy Counting
+chunk_role: dialogue_beat
+concept_tags:
+  - discipline
+  - cost_accounting
+  - incorrect_assumption
+knowledge_state:
+  - actor_visible
+  - inferred
+speakers:
+  - Varro
+  - Felix
+  - Chresimus
+scene_location: Ostia cart yard
+scene_signal: Felix treats price difference as profit before costs are secured
+demonstrated_concepts:
+  - gross_difference_not_profit
+  - cost_accounting
+  - disciplined_trade
+-->
+## Varro Refuses Easy Counting
+
+Varro arrived while Felix was still pleased with his own arithmetic. His military cloak was faded, but his eyes moved over the jars as if they were recruits standing badly in line.
+
+“You are smiling too soon,” Varro said.
+
+Felix folded his arms. “Ten here, fourteen there. Even a soldier can see it.”
+
+“A soldier sees what is missing,” Varro said. “How many jars break when the cart jolts? Who pays the driver if the wheel splits outside Tarracina? Who watches the jars while your man sleeps?”
+
+Secundus nodded once, approvingly.
+
+Felix said, “If I count every misfortune before I begin, I will never buy anything.”
+
+“If you count none of them,” Varro said, “you are not trading. You are gambling with a cart.”
+
+Chresimus pressed his stylus into the wax. “Ten jars bought for one hundred. Cart and guard, eight. If one jar breaks, nine jars remain. At fourteen each, one hundred and twenty-six. Gain becomes eighteen, not thirty-two.”
+
+Felix stopped smiling.
+
+Varro said, “Now you are closer to the road.”
+<!-- /chunk -->
+
+<!-- chunk:
+id: DIALOGUE-0001::04::capua_letter_and_rival_cart
+source_file: DIALOGUE-0001-oil-at-ostia-and-capua.md
+repository_path: docs/training/corpus/Layer_4--Dialogues/DIALOGUE-0001-oil-at-ostia-and-capua.md
+domain: commerce
+layer: Layer_4--Dialogues
+document_id: DIALOGUE-0001
+document_title: "Oil At Ostia And Capua"
+section_heading: Capua Letter And Rival Cart
+chunk_role: dialogue_beat
+concept_tags:
+  - rumor_uncertainty
+  - rival_arrival
+  - information_delay
+knowledge_state:
+  - actor_visible
+  - reported
+  - inferred
+speakers:
+  - Lentulus
+  - Felix
+  - Chresimus
+  - Varro
+scene_location: Ostia warehouse entrance
+scene_signal: letter from Capua and report of another oil cart leaving first
+demonstrated_concepts:
+  - stale_information
+  - rival_capacity
+  - price_change_before_arrival
+-->
+## Capua Letter And Rival Cart
+
+Lentulus came from the warehouse steps with a folded letter held between two fingers. The seal had already been broken.
+
+“My cousin writes from Capua,” he said. “Oil was dear because a storehouse near the market was shut for repairs. He says buyers were impatient.”
+
+“Were?” Chresimus asked.
+
+“The letter is four days old,” Lentulus said.
+
+Felix looked toward the road. “Then the muleteer’s word and the letter agree.”
+
+“They agree about days already dead,” Chresimus said.
+
+A porter passing with rope over his shoulder added, “Clodius sent a cart of oil out this morning. Good mules. Light load. He paid extra to change teams at the first station.”
+
+Felix cursed softly.
+
+Varro looked at the road dust beyond the gate. “If Clodius arrives first, he sells into the hunger. If you arrive after him, you sell into his leftovers.”
+
+Lentulus tapped the letter. “Or my cousin’s repairmen are still lazy, and hunger remains.”
+
+Felix said, “So the question is not whether oil was dear. It is whether it will still be dear when my jars arrive.”
+<!-- /chunk -->
+
+<!-- chunk:
+id: DIALOGUE-0001::05::scribe_sets_the_choice
+source_file: DIALOGUE-0001-oil-at-ostia-and-capua.md
+repository_path: docs/training/corpus/Layer_4--Dialogues/DIALOGUE-0001-oil-at-ostia-and-capua.md
+domain: commerce
+layer: Layer_4--Dialogues
+document_id: DIALOGUE-0001
+document_title: "Oil At Ostia And Capua"
+section_heading: Scribe Sets The Choice
+chunk_role: dialogue_beat
+concept_tags:
+  - decision_option
+  - confirmation_cost
+  - opportunity_cost
+knowledge_state:
+  - actor_visible
+  - inferred
+speakers:
+  - Chresimus
+  - Felix
+  - Secundus
+  - Lentulus
+scene_location: Ostia warehouse table
+scene_signal: competing choices to buy now, send inquiry, or abandon the venture
+demonstrated_concepts:
+  - confirmation_has_cost
+  - delay_changes_trade
+  - decision_under_uncertainty
+-->
+## Scribe Sets The Choice
+
+Chresimus smoothed the wax with the flat of his stylus and drew three short columns.
+
+“Buy now,” he said, cutting the first mark. “You may catch the price, or you may chase a price already gone.”
+
+He cut the second mark. “Send a fast boy to Capua first. You spend less today, but the cart waits, and Clodius does not wait with it.”
+
+He cut the third mark. “Leave the oil here. You lose nothing but the chance.”
+
+Felix leaned over the tablet. “You make caution look expensive.”
+
+“Caution is expensive,” Secundus said. “So is haste. The gods charge either way.”
+
+Lentulus said, “A letter from my cousin may open a buyer’s door, if the buyer remembers my family kindly.”
+
+Varro looked at Felix. “Then say what you are buying. Oil? Time? A cousin’s name? Or the hope that Clodius breaks a wheel?”
+
+Felix was silent for a moment.
+
+“At ten asses a jar,” he said at last, “I buy only if Secundus finds me a faster cart.”
+<!-- /chunk -->
+
+<!-- chunk:
+id: DIALOGUE-0001::06::faster_cart_lower_gain
+source_file: DIALOGUE-0001-oil-at-ostia-and-capua.md
+repository_path: docs/training/corpus/Layer_4--Dialogues/DIALOGUE-0001-oil-at-ostia-and-capua.md
+domain: commerce
+layer: Layer_4--Dialogues
+document_id: DIALOGUE-0001
+document_title: "Oil At Ostia And Capua"
+section_heading: Faster Cart Lower Gain
+chunk_role: dialogue_beat
+concept_tags:
+  - transport_capacity
+  - lower_profit_for_lower_risk
+  - decision_threshold
+knowledge_state:
+  - actor_visible
+  - inferred
+speakers:
+  - Secundus
+  - Felix
+  - Chresimus
+  - Varro
+scene_location: Ostia cart yard
+scene_signal: faster cart available at higher cost
+demonstrated_concepts:
+  - speed_cost_tradeoff
+  - reduced_margin
+  - practical_decision
+-->
+## Faster Cart Lower Gain
+
+Secundus returned with a driver whose tunic was patched but whose mules stood alert and narrow-eyed.
+
+“Twelve asses,” Secundus said. “He leaves now, changes beasts once, and sleeps only when the jars are under a roof.”
+
+Felix groaned. “Twelve for the road instead of eight.”
+
+“Four asses more to arrive before tomorrow’s gossip grows old,” Secundus said.
+
+Chresimus marked the wax again. “Ten jars: one hundred to buy. Twelve for the road. One hundred and twelve laid out. If Capua pays fourteen, one hundred and forty returns. Twenty-eight above the outlay.”
+
+“Less than before,” Felix said.
+
+“Less dream,” Varro said. “More chance of waking with coin.”
+
+Felix looked at the jars, then at the mules, then at the road.
+
+“Buy eight jars, not ten,” he said. “Leave coin for trouble. If Capua still wants oil, we sell. If not, we are bruised, not broken.”
+
+Chresimus wrote it down.
+
+Secundus called for ropes.
+
+Varro said, “Now it is a venture.”
+<!-- /chunk -->