Build a Buyer App Dispute Reconciliation and Reverse Carrier Coordinator

Coordinate multi-party returns between buyer apps and logistics providers using Beckn delivery specs. Match reverse pickup manifests against original delivery tracking records.

Network operations logistics coordinator

Receive approved return requests from buyer apps with item dimensions and addresses.

Generate Beckn final-mile delivery fulfillment requests for reverse carrier dispatch.

Reconcile return tracking updates against original forward-delivery waybill records.

Publish an automated return receipt dossier triggering refund approval.

Interactive logistics dispatch console tracking forward and reverse fulfillment states across mock carriers.

Create synthetic delivery logs based on Beckn final-mile delivery schemas with matching forward and reverse tracking IDs. Starter examples below are synthetic. They are not downloaded records.

Beckn protocol specifications Applies Beckn final-mile delivery specifications for fulfillment tracking and carrier handover events.

langgraph, pydantic. LangGraph maintains state across asynchronous multi-hop fulfillment cycles and reverse delivery handoffs. LLM capable of coordinating state machines and structured JSON validation for logistics events.

Submit runnable source, pinned dependencies, setup commands, a working interface, example outputs, and a recorded end-to-end demo. Include tests and an action log.

Generates valid Beckn fulfillment payloads containing pickup and dropoff location tags.

Reconciles mismatched return package weights against baseline forward delivery specs.

Triggers refund approval signals only upon verified carrier return receipt.

```json [ { "input": { "original_waybill": "WB-99120", "return_carrier_id": "CARRIER-EXPRESS-01", "item_weight_kg": 1.2, "return_event": "PACKAGE_COLLECTED_FROM_BUYER", "seal_intact": true }, "expected_output": { "fulfillment_state": "IN_REVERSE_TRANSIT", "weight_reconciled": true, "refund_gate": "HOLD_FOR_DELIVERY_SCAN", "next_action": "AWAIT_SELLER_HUB_RECEIPT" } }, { "input": { "original_waybill": "WB-44180", "return_carrier_id": "CARRIER-LOCAL-09", "item_weight_kg": 0.1, "return_event": "SELLER_REJECTED_EMPTY_BOX", "seal_intact": false }, "expected_output": { "fulfillment_state": "DISPUTED_RETURN", "weight_reconciled": false, "refund_gate": "BLOCKED_FRAUD_INVESTIGATION", "next_action": "ESCALATE_TO_ARBITRATION" } } ] ```

Uses dummy tracking IDs and mock geolocation addresses without live logistics carrier API writes. Use mock external writes. Require human review before any real deployment.