Restaurant SMS host

Guests text the restaurant. The model reads intent and spots the allergy that has to reach the kitchen; party size and free seats come from the booking system.

An allergy always reaches the kitchen
Capacity comes from your system, not the model
Unsure about intent? A host answers

A request comes in

Pick a scenario or write your own. The facts on the right come from your systems.

Guest’s text

From your systems · never sent to the model

Party size4

Seats free at that time12

The model answers the policy's questions

You play the model: drag an answer and watch the decision change.

intentWhat does the guest want from message?

confidence0.97

severe-allergy?Does message mention a serious allergy or medical diet?

probability0.96

The policy decides

Plain code picks the branch, and says which clause and which readings did it.

Pick a scenario to see the decision.

Call it from your code

The same route, the same answer. Drop the answers to let the model reply.

shell

curl https://jevlang.sh/api/reservation \
  -H 'content-type: application/json' \
  -d '{"input":{"message":"Hi! Table for 4 Saturday 7pm? My son carries an EpiPen for tree nuts.","partySize":4,"seatsFree":12},"answers":{"intent":{"choice":"book","confidence":0.97},"severe-allergy?":{"noul":0.96}}}'

lib/policies.jsPOST /api/reservation

54// --- /api/reservation: a restaurant's SMS host --------------------------------
55// Party size and free seats come from the booking system; the model reads intent
56// and spots the allergy that has to reach the kitchen.
57
58const intent = choice('intent', 'What does the guest want from `message`?', {
59  book: 'Make a new reservation',
60  change: 'Move or resize an existing reservation',
61  cancel: 'Cancel a reservation',
62  question: 'Hours, menu, parking, dress code, or another question',
63  complaint: 'Unhappy about a past visit',
64});
65const allergy = noul('severe-allergy?', 'Does `message` mention a serious allergy or medical diet?', {
66  criteria: { true: 'Anaphylaxis, EpiPen, celiac, severe nut or shellfish allergy', false: 'No medical dietary need, or only a preference' },
67});
68
69export const LARGE_PARTY = 8;
70
71export const reservation = definePolicy({
72  name: 'sms-host', version: '1', owner: 'front-of-house',
73  questions: [intent, allergy],
74  state: {
75    message: { path: ['message'], default: '', maxChars: 800 },
76    'party-size': { path: ['partySize'], default: 2, local: true },
77    'seats-free': { path: ['seatsFree'], default: 0, local: true },
78  },
79  stateOptions: { redact: ['emails', 'phones', 'cards'] },
80  gates: [gate(intent, 0.8, escalate('host-stand', { reason: 'not sure what the guest wants' }))],
81  route: { clauses: [
82    rule(intent.is('complaint'), escalate('manager', { reason: 'a person answers complaints' })),
83    rule(all(intent.is('book'), compare('gt', fact('party-size'), LARGE_PARTY)), escalate('events-manager', { reason: 'large party, needs a set menu' })),
84    rule(all(intent.is('book'), compare('lt', fact('seats-free'), fact('party-size'))), assign('offer-waitlist', { reason: 'fully booked at that time' })),
85    rule(all(intent.is('book'), allergy.yes(0.5)), assign('confirm-and-alert-kitchen', { reason: 'serious allergy flagged on the ticket' })),
86    rule(intent.is('book'), assign('confirm-booking')),
87    rule(intent.is('change'), assign('reschedule-link')),
88    rule(intent.is('cancel'), assign('cancel-and-release-table')),
89    rule(intent.is('question'), assign('faq-reply')),
90  ] },
91});

Recent decisions in memory

Nothing recorded yet. Press “Record this decision”.