diff --git a/src/lib/incidents.test.ts b/src/lib/incidents.test.ts
deleted file mode 100644
index 6468c11..0000000
--- a/src/lib/incidents.test.ts
+++ /dev/null
@@ -1,41 +0,0 @@
-import { describe, expect, it } from 'vitest'
-import { ALL_TYPES, createIncident, filterIncidents, nextIncidentId } from './incidents'
-import { seedIncidents } from './seed'
-
-describe('filterIncidents', () => {
-  it('returns everything with an empty query and no type filter', () => {
-    expect(filterIncidents(seedIncidents, '', ALL_TYPES)).toHaveLength(seedIncidents.length)
-  })
-
-  it('matches title, id and location case-insensitively', () => {
-    expect(filterIncidents(seedIncidents, 'FORKLIFT', ALL_TYPES).map((i) => i.id)).toEqual(['INC-2408'])
-    expect(filterIncidents(seedIncidents, 'inc-2405', ALL_TYPES).map((i) => i.id)).toEqual(['INC-2405'])
-    expect(filterIncidents(seedIncidents, 'line 3', ALL_TYPES).map((i) => i.id)).toEqual(['INC-2406'])
-  })
-
-  it('filters by type', () => {
-    expect(filterIncidents(seedIncidents, '', 'Hazard').map((i) => i.id)).toEqual(['INC-2407'])
-  })
-})
-
-describe('nextIncidentId', () => {
-  it('increments the highest existing id', () => {
-    expect(nextIncidentId(seedIncidents)).toBe('INC-2409')
-  })
-
-  it('starts at INC-0001 when there are no incidents', () => {
-    expect(nextIncidentId([])).toBe('INC-0001')
-  })
-})
-
-describe('createIncident', () => {
-  it('assigns id, status, date and reporter', () => {
-    const incident = createIncident(
-      { title: 'Spill', type: 'Hazard', severity: 'Low', building: 'Building A', location: 'Dock' },
-      seedIncidents,
-      'Alex Kim',
-      new Date(2026, 9, 6, 9, 30),
-    )
-    expect(incident).toMatchObject({ id: 'INC-2409', status: 'New report', date: '2026-10-06', reporter: 'Alex Kim' })
-  })
-})
diff --git a/src/lib/incidents.ts b/src/lib/incidents.ts
deleted file mode 100644
index 1c158e6..0000000
--- a/src/lib/incidents.ts
+++ /dev/null
@@ -1,47 +0,0 @@
-import { toIsoDate } from './dates'
-import type { Tone } from './tones'
-import type { Incident, IncidentStatus, IncidentType, NewIncident, Severity } from './types'
-
-export const ALL_TYPES = 'All incidents'
-export type TypeFilter = IncidentType | typeof ALL_TYPES
-
-export function filterIncidents(incidents: Incident[], query: string, type: TypeFilter): Incident[] {
-  const needle = query.trim().toLowerCase()
-  return incidents.filter(
-    (incident) =>
-      `${incident.title} ${incident.id} ${incident.location}`.toLowerCase().includes(needle) &&
-      (type === ALL_TYPES || incident.type === type),
-  )
-}
-
-/** Next sequential ID after the highest existing `INC-####`. Temporary until the backend assigns IDs. */
-export function nextIncidentId(incidents: Incident[]): string {
-  const highest = incidents.reduce((max, { id }) => Math.max(max, Number(id.replace(/^INC-/, '')) || 0), 0)
-  return `INC-${String(highest + 1).padStart(4, '0')}`
-}
-
-export const isOpen = (incident: Incident) => incident.status !== 'Resolved'
-
-export const typeTone: Record<IncidentType, Tone> = {
-  'Near miss': 'amber',
-  Hazard: 'sky',
-  Injury: 'coral',
-  'Property damage': 'mint',
-}
-
-export const severityDotClass: Record<Severity, string> = {
-  High: 'bg-coral-strong',
-  Medium: 'bg-[#d8a631]',
-  Low: 'bg-[#52a57e]',
-}
-
-export function statusClass(status: IncidentStatus): string {
-  if (status === 'Resolved') return 'bg-mint-soft text-[#398461]'
-  if (status === 'Review required') return 'bg-coral-soft text-[#c75e4b]'
-  return 'bg-[#fff0d2] text-[#9a7319]'
-}
-
-/** Builds a full incident record from a submitted report. */
-export function createIncident(draft: NewIncident, existing: Incident[], reporter: string, now: Date): Incident {
-  return { ...draft, id: nextIncidentId(existing), status: 'New report', date: toIsoDate(now), reporter }
-}
diff --git a/src/lib/seed.ts b/src/lib/seed.ts
deleted file mode 100644
index 19ddd35..0000000
--- a/src/lib/seed.ts
+++ /dev/null
@@ -1,20 +0,0 @@
-import type { Incident, Person, Site } from './types'
-
-// Demo data for the UI prototype. Replaced by the API in Phase 1.
-
-export const currentUser: Person = { name: 'Jordan Lee', initials: 'JL', role: 'Safety manager' }
-
-export const workspace = { name: 'Northstar Co.', initials: 'NC' }
-
-export const seedIncidents: Incident[] = [
-  { id: 'INC-2408', title: 'Forklift reversed into pallet stack', type: 'Near miss', severity: 'High', status: 'Investigation', building: 'Warehouse 04', location: 'Loading bay C', date: '2024-08-28', reporter: 'Jordan Lee' },
-  { id: 'INC-2407', title: 'Wet floor near employee entrance', type: 'Hazard', severity: 'Medium', status: 'Action open', building: 'Building A', location: 'Ground floor lobby', date: '2024-08-27', reporter: 'Maya Chen' },
-  { id: 'INC-2406', title: 'Hand laceration during material handling', type: 'Injury', severity: 'High', status: 'Review required', building: 'Fabrication 02', location: 'Line 3', date: '2024-08-26', reporter: 'Sam Rivera' },
-  { id: 'INC-2405', title: 'Damaged guardrail on mezzanine', type: 'Property damage', severity: 'Low', status: 'Resolved', building: 'Warehouse 01', location: 'Mezzanine east', date: '2024-08-24', reporter: 'Priya Shah' },
-]
-
-export const sites: Site[] = [
-  { name: 'North Campus', buildings: ['Building A', 'Warehouse 04', 'Lab 2'], incidentCount: 12 },
-  { name: 'South Campus', buildings: ['Fabrication 02', 'Yard', 'Office block'], incidentCount: 7 },
-  { name: 'West Campus', buildings: ['Warehouse 01', 'Loading dock'], incidentCount: 5 },
-]
diff --git a/src/lib/types.ts b/src/lib/types.ts
deleted file mode 100644
index cd80e15..0000000
--- a/src/lib/types.ts
+++ /dev/null
@@ -1,38 +0,0 @@
-export const incidentTypes = ['Near miss', 'Hazard', 'Injury', 'Property damage'] as const
-export type IncidentType = (typeof incidentTypes)[number]
-
-export const severities = ['Low', 'Medium', 'High'] as const
-export type Severity = (typeof severities)[number]
-
-export type IncidentStatus = 'New report' | 'Investigation' | 'Action open' | 'Review required' | 'Resolved'
-
-export interface Incident {
-  id: string
-  title: string
-  type: IncidentType
-  severity: Severity
-  status: IncidentStatus
-  site?: string
-  building: string
-  location: string
-  /** ISO calendar date, e.g. `2024-08-28` */
-  date: string
-  reporter: string
-  details?: string
-  cause?: string
-  response?: string
-}
-
-export type NewIncident = Omit<Incident, 'id' | 'status' | 'date' | 'reporter'>
-
-export interface Site {
-  name: string
-  buildings: string[]
-  incidentCount: number
-}
-
-export interface Person {
-  name: string
-  initials: string
-  role: string
-}