diff --git a/src/lib/assignFlow.js b/src/lib/assignFlow.js
new file mode 100644
index 0000000..ced98e7
--- /dev/null
+++ b/src/lib/assignFlow.js
@@ -0,0 +1,57 @@
+// Ablauf-Logik des Zuordnen-Assistenten (reine Funktionen, ohne UI).
+// state: { step, kind, forCustomer, customerId, ticketId, newTicket }
+
+export function nextStep(state) {
+  switch (state.step) {
+    case 'kind':
+      return 'customer?'
+    case 'customer?':
+      return state.forCustomer ? 'customer' : 'summary'
+    case 'customer':
+      return 'ticket'
+    default:
+      return 'summary'
+  }
+}
+
+export function prevStep(state) {
+  switch (state.step) {
+    case 'customer?':
+      return 'kind'
+    case 'customer':
+      return 'customer?'
+    case 'ticket':
+      return 'customer'
+    case 'summary':
+      return state.forCustomer ? 'ticket' : 'customer?'
+    default:
+      return 'kind'
+  }
+}
+
+export function newTicketDefaults({ kindLabel, ticketType, repoName, repoUrl, customer, today }) {
+  return {
+    topic: `${kindLabel} – ${repoName}`,
+    type: ticketType,
+    requestedBy: customer?.contactName || customer?.name || '',
+    startDate: today,
+    details: `Repository: ${repoUrl}`,
+  }
+}
+
+const filled = (v) => typeof v === 'string' && v.trim() !== ''
+
+export function canFinish(state) {
+  if (!state.kind) return false
+  if (!state.forCustomer) return true
+  if (!state.customerId) return false
+  if (state.ticketId) return true
+  const t = state.newTicket
+  return !!t && filled(t.topic) && filled(t.requestedBy) && filled(t.startDate)
+}
+
+export function openTicketsFor(tickets, customerId) {
+  return (tickets || []).filter(
+    (t) => t.customerId === customerId && t.status !== 'Closed' && t.status !== 'Cancelled'
+  )
+}
diff --git a/src/lib/projectKindsApi.js b/src/lib/projectKindsApi.js
new file mode 100644
index 0000000..3907ac4
--- /dev/null
+++ b/src/lib/projectKindsApi.js
@@ -0,0 +1,41 @@
+import { account, databases, DATABASE_ID, COLLECTIONS } from './appwrite'
+
+const PROJECT_ADMIN_URL =
+  import.meta.env.VITE_PROJECT_ADMIN_URL || 'https://project.webklar.com'
+
+// Wie adminFetch in projectAdminApi.js, aber der Fehler trägt .status und .data
+// (Antwort-Body), damit die Seite z. B. die Details eines 409 anzeigen kann.
+async function kindsFetch(path, options = {}) {
+  const jwt = await account.createJWT()
+  const response = await fetch(`${PROJECT_ADMIN_URL}${path}`, {
+    ...options,
+    headers: {
+      Authorization: `Bearer ${jwt.jwt}`,
+      'Content-Type': 'application/json',
+      ...options.headers,
+    },
+  })
+  const data = await response.json().catch(() => ({}))
+  if (!response.ok) {
+    const error = new Error(data.error || `API-Fehler ${response.status}`)
+    error.status = response.status
+    error.data = data
+    throw error
+  }
+  return data
+}
+
+export function fetchServices() {
+  return kindsFetch('/api/admin/services')
+}
+
+export function completeAssignment(projectId, body) {
+  return kindsFetch(`/api/admin/website-projects/${projectId}/zuordnen`, {
+    method: 'POST',
+    body: JSON.stringify(body),
+  })
+}
+
+export function fetchProject(projectId) {
+  return databases.getDocument(DATABASE_ID, COLLECTIONS.WEBSITE_PROJECTS, projectId)
+}
diff --git a/tests/unit/assignFlow.test.mjs b/tests/unit/assignFlow.test.mjs
new file mode 100644
index 0000000..09bfa30
--- /dev/null
+++ b/tests/unit/assignFlow.test.mjs
@@ -0,0 +1,72 @@
+import test from 'node:test'
+import assert from 'node:assert/strict'
+import { loadModule } from './load.mjs'
+
+const { nextStep, prevStep, newTicketDefaults, canFinish, openTicketsFor } = await loadModule(
+  'src/lib/assignFlow.js'
+)
+
+test('nextStep: Kunde ja durchläuft alle Schritte', () => {
+  const s = { forCustomer: true }
+  assert.equal(nextStep({ ...s, step: 'kind' }), 'customer?')
+  assert.equal(nextStep({ ...s, step: 'customer?' }), 'customer')
+  assert.equal(nextStep({ ...s, step: 'customer' }), 'ticket')
+  assert.equal(nextStep({ ...s, step: 'ticket' }), 'summary')
+  assert.equal(nextStep({ ...s, step: 'summary' }), 'summary')
+})
+
+test('nextStep: ohne Kunde springt customer? direkt zu summary', () => {
+  assert.equal(nextStep({ step: 'customer?', forCustomer: false }), 'summary')
+})
+
+test('prevStep', () => {
+  assert.equal(prevStep({ step: 'kind' }), 'kind')
+  assert.equal(prevStep({ step: 'customer?' }), 'kind')
+  assert.equal(prevStep({ step: 'customer', forCustomer: true }), 'customer?')
+  assert.equal(prevStep({ step: 'ticket', forCustomer: true }), 'customer')
+  assert.equal(prevStep({ step: 'summary', forCustomer: true }), 'ticket')
+  assert.equal(prevStep({ step: 'summary', forCustomer: false }), 'customer?')
+})
+
+test('newTicketDefaults', () => {
+  const d = newTicketDefaults({
+    kindLabel: 'Migration/Umzug',
+    ticketType: 'Migration',
+    repoName: 'foo',
+    repoUrl: 'https://git.webklar.com/webklar/foo',
+    customer: { name: 'Firma', contactName: 'Max' },
+    today: '2026-09-30',
+  })
+  assert.equal(d.topic, 'Migration/Umzug – foo')
+  assert.equal(d.type, 'Migration')
+  assert.equal(d.requestedBy, 'Max')
+  assert.equal(d.startDate, '2026-09-30')
+  assert.ok(d.details.includes('https://git.webklar.com/webklar/foo'))
+  const e = newTicketDefaults({ kindLabel: 'Website', ticketType: 'Webpage', repoName: 'x', repoUrl: 'u', customer: { name: 'Firma' }, today: '2026-09-30' })
+  assert.equal(e.requestedBy, 'Firma')
+  assert.equal(e.type, 'Webpage')
+})
+
+test('canFinish', () => {
+  assert.equal(canFinish({ kind: '' , forCustomer: false }), false)
+  assert.equal(canFinish({ kind: 'app', forCustomer: false }), true)
+  assert.equal(canFinish({ kind: 'app', forCustomer: true }), false)
+  assert.equal(canFinish({ kind: 'app', forCustomer: true, customerId: 'c1' }), false)
+  assert.equal(canFinish({ kind: 'app', forCustomer: true, customerId: 'c1', ticketId: 't1' }), true)
+  const nt = { topic: 'T', requestedBy: 'M', startDate: '2026-09-30', details: 'd' }
+  assert.equal(canFinish({ kind: 'app', forCustomer: true, customerId: 'c1', newTicket: nt }), true)
+  assert.equal(canFinish({ kind: 'app', forCustomer: true, customerId: 'c1', newTicket: { ...nt, topic: ' ' } }), false)
+  assert.equal(canFinish({ kind: 'app', forCustomer: true, newTicket: nt }), false)
+})
+
+test('openTicketsFor', () => {
+  const t = [
+    { $id: '1', customerId: 'c1', status: 'Open' },
+    { $id: '2', customerId: 'c1', status: 'Closed' },
+    { $id: '3', customerId: 'c1', status: 'Cancelled' },
+    { $id: '4', customerId: 'c2', status: 'Open' },
+    { $id: '5', customerId: 'c1', status: 'In Progress' },
+  ]
+  assert.deepEqual(openTicketsFor(t, 'c1').map((x) => x.$id), ['1', '5'])
+  assert.deepEqual(openTicketsFor(null, 'c1'), [])
+})