io.github.farssaadeldin7-ux/trail-split

Open the Stripe billing portal to change plan, update the card, or cancel the Trail Split subscription.

The shared-versus-personal classification test, the three tags (SHARED, REDUNDANT-SHARED, PERSONAL) and their rules, the typical classification of common kit, which items split across carriers, and the duplication audit. Reference tables only — it does not classify your list for you. Omit section to get everything.

Store and activate a Trail Split licence key on this machine. Use when the user pastes a licence key, or after a purchase completes.

Check the Trail Split licence on this machine: plan, included capabilities, remaining quota and seat usage. Call this when a paid tool reports a licence problem, or when the user asks what their plan includes.

List the available Trail Split plans, prices and what each one includes.

The planning tables: kcal/person/day by exertion band, food dry weight and ration density, the rationing reserve, water by conditions, treatment throughput by method, fuel by conditions, the per-person carry bands, and the three cost split models. All stated convention with ranges — not physiology, not a forecast, and not a substitute for weighing real kit. Omit section to get everything.

Run the four finishing checks: every SHARED instance has exactly one named carrier and every REDUNDANT-SHARED item at least two in different packs; all seven systems have an owner and a backup with a different person; nobody exceeds their band; balances sum to zero and every expense has a payer and a model. Also records the two always-required items — emergency communications and a route plan left with someone off the trip — as recorded, declined or missing. Mechanical checks on names, tags, packs and sums: it cannot judge whether a backup or a first aid kit is any good. Requires a paid plan.

Build the cost ledger and settle it: per-expense shares under each expense's own model (even, weighted by nights or person-days, itemised), balances as paid minus owed with an exact zero-sum check, then the greedy settle-up with zero-sum subgroups split out first. Works in whole pennies, gives rounding leftovers to the largest creditor, and reports "settles in N transfers" — never "the minimum", which it cannot prove. Requires a paid plan.

Compute food, reserve, water and fuel for a party from the planning figures: dry grams per person per day from kcal and ration density, the mandatory one-day reserve at roughly 60% ration, daily water by conditions, and net canister gas by conditions. Where a figure is a range in the reference and no point is chosen, the result is a range — never an invented midpoint. Requires a paid plan.

The seven-system single-point-of-failure table — shelter, water treatment, fire/stove, navigation, first aid, communications, repair — with what counts as an acceptable backup for each, what does not, and the rules that go with the table. Every system needs a named owner and a backup in a different pack, or the plan is not finished. Omit system to get all seven.

Begin a Trail Split purchase. Returns a Stripe Checkout link. Call list_plans first if the user has not chosen a plan.

Total each person's load — personal kit, water, consumables and assigned group mass — against their carry band, and name what binds: who is over, whether the trip fits in aggregate but not as split, whose limit is exceeded before any group mass is added, and who starts with too little headroom. Bands are load convention, not physiology, and a person without a body weight is handled as a self-declared target load, never an assumed 70 kg. Requires a paid plan.