TRAVEL-202609-uswest/AGENTS.md

Repository Maintenance Rules

Expense synchronization

Whenever a document is added or changed and it confirms an actual booked or paid expense, update expenses.md in the same change.

1. Add or update exactly one ledger row per real expense. Do not duplicate an expense merely because it appears in both a booking file, PDF, email, or itinerary.
2. Do not add shortlist prices, rejected options, refundable deposits, estimated optional fees, or TBC amounts as expenses.
3. Record the payer exactly. If it is not clear who paid, ask the user before updating the ledger; do not infer the payer.
4. Preserve the source currency in the ledger. For shared-cost settlement, use the USD amount recorded in Tricount.
5. The accounting couples are KTVT (KT + VT) and LKMS (LK + MS). Shared expenses are split 50/50 between them unless a source clearly identifies an expense as couple-only.
6. Couple-only expenses stay in the ledger for completeness but do not affect the cross-couple settlement.
7. Ignore discrepancies below US$1 when they plausibly result from currency conversion or rounding.
8. After every ledger-row change, recompute the net balance and update the single settlement sentence in expenses.md. Show only the final result in the form: “KTVT owes LKMS US$X.XX.” (or the reverse).