crewli/dev-docs/API.md

# Crewli API Contract

Base path: `/api/v1/`

Auth: Bearer token (Sanctum) — token delivered via httpOnly cookie, never in the JSON response body. See `/dev-docs/AUTH_ARCHITECTURE.md` for full details.

## Auth

- `POST /auth/login` — returns user data in JSON body. The Sanctum bearer token is set as an httpOnly cookie via `Set-Cookie` header (not included in response body).
- `POST /auth/logout`
- `GET /auth/me`
- `POST /auth/refresh` — rotates the Sanctum token: revokes current token, creates new one, sets new httpOnly cookie. Returns current user data.
- `POST /auth/forgot-password` — request password reset (public, rate-limited). Body: `{ email, app: "app"|"portal"|"admin" }`. Always returns 200 (no email enumeration).
- `POST /auth/reset-password` — reset password with token (public). Body: `{ token, email, password, password_confirmation }`.

## Account Management (authenticated)

- `POST /me/change-password` — change own password. Body: `{ current_password, password, password_confirmation }`. Revokes other sessions.
- `POST /me/change-email` — request email change (sends verification to new address). Body: `{ new_email, password, app: "app"|"portal"|"admin" }`.
- `POST /verify-email-change` — verify email change token (public). Body: `{ token }`. Revokes all sessions.

## Organisations

- `GET /organisations` — list (super admin)
- `POST /organisations` — create
- `GET /organisations/{org}` — show
- `PUT /organisations/{org}` — update
- `GET /organisations/{org}/members` — members
- `POST /organisations/{org}/invite` — invite user
- `POST /organisations/{org}/members/{user}/change-email` — admin initiates email change for a member (org_admin only). Body: `{ new_email }`.

## Events

- `GET /organisations/{org}/events` — list (top-level only by default)
- `GET /organisations/{org}/events?include_children=true` — include sub-events nested in response
- `GET /organisations/{org}/events?type=festival` — filter by event_type (festival|series|event)
- `POST /organisations/{org}/events` — create (supports `parent_event_id` for sub-events)
- `GET /organisations/{org}/events/{event}` — detail (includes children and parent if loaded)
- `PUT /organisations/{org}/events/{event}` — update (does NOT accept `status` — use transition endpoint)
- `POST /organisations/{org}/events/{event}/transition` — change event status via state machine (see below)
- `GET /organisations/{org}/events/{event}/children` — list sub-events of a festival/series

### Event Status Transitions

`POST /organisations/{org}/events/{event}/transition`

Body: `{ "status": "published" }`

Enforces a state machine: only valid forward (and select backward) transitions are allowed.
Returns 422 with `errors`, `current_status`, `requested_status`, and `allowed_transitions` when the transition is invalid or prerequisites are missing.

**Prerequisites checked:**
- `→ published`: name, start_date, end_date required
- `→ registration_open`: at least one time slot and one section required

**Festival cascade:** Transitioning a festival parent to `showday`, `teardown`, or `closed` automatically cascades to all children in an earlier status.

**EventResource** includes `allowed_transitions` (array of valid next statuses) so the frontend knows which buttons to show.

## Event Stats

- `GET /organisations/{org}/events/{event}/stats` — aggregate dashboard counts for the event

### Response

```json
{
  "data": {
    "persons_total": 142,
    "persons_approved": 98,
    "persons_pending": 31,
    "persons_rejected": 8,
    "persons_other": 5,
    "persons_approved_without_shift": 23,
    "pending_identity_matches": 3,
    "shifts_total": 45,
    "shifts_filled": 38,
    "shifts_understaffed": 7
  }
}
```

## Crowd Types

- `GET /organisations/{org}/crowd-types`
- `POST /organisations/{org}/crowd-types`
- `PUT /organisations/{org}/crowd-types/{type}`
- `DELETE /organisations/{org}/crowd-types/{type}`

## Companies

- `GET /organisations/{org}/companies`
- `POST /organisations/{org}/companies`
- `PUT /organisations/{org}/companies/{company}`
- `DELETE /organisations/{org}/companies/{company}`

## Section Categories

- `GET /organisations/{org}/section-categories` — distinct categories used across the organisation's events (for autocomplete). Returns `{ "data": ["Bar", "Podium", ...] }`

## Festival Sections

- `GET /organisations/{org}/events/{event}/sections`
- `POST /organisations/{org}/events/{event}/sections`
- `PUT /organisations/{org}/events/{event}/sections/{section}`
- `DELETE /organisations/{org}/events/{event}/sections/{section}`
- `POST /organisations/{org}/events/{event}/sections/reorder`

> **Festival context:** `{event}` can be a festival parent or a sub-event.
> On a festival parent, sections are for operational planning (build-up, teardown).
> For sub-events, `GET` automatically includes `cross_event` sections from the parent festival.
> Shifts on cross_event sections must use the **parent festival's event_id** in API calls,
> since the section's `event_id` points to the parent.

### Registration Settings (Festival-level bulk management)

- `GET /organisations/{org}/events/{event}/sections/registration-settings` — returns unique section names across the festival with registration visibility, description, and counts
- `PUT /organisations/{org}/events/{event}/sections/registration-settings` — bulk update registration visibility for a section name across all instances in the festival

#### GET Response

```json
{
  "data": [
    {
      "name": "Hoofdpodium Bar",
      "category": "Bar",
      "icon": "tabler-beer",
      "show_in_registration": true,
      "registration_description": "Tap bier en drankjes voor festivalgangers",
      "section_count": 3,
      "section_ids": ["ulid1", "ulid2", "ulid3"]
    }
  ]
}
```

#### PUT Body

```json
{
  "name": "Hoofdpodium Bar",
  "show_in_registration": true,
  "registration_description": "Tap bier en drankjes voor festivalgangers"
}
```

Returns the full updated registration-settings response. Creates activity log `section.registration_settings_updated`.

Auth: org_admin or event_manager on the event's organisation.

## Time Slots

- `GET /organisations/{org}/events/{event}/time-slots`
- `POST /organisations/{org}/events/{event}/time-slots`
- `PUT /organisations/{org}/events/{event}/time-slots/{timeSlot}`
- `DELETE /organisations/{org}/events/{event}/time-slots/{timeSlot}`

> **Festival context:** `{event}` can be a festival parent or a sub-event.
> Festival-level time slots (operational: build-up, teardown, transitions) are separate
> from sub-event time slots (program-specific).
>
> `GET /organisations/{org}/events/{event}/time-slots` returns only the specified event's own time slots by
> default. For sub-events, pass `?include_parent=true` to also include the parent festival's
> time slots — each time slot is marked with a `source` field (`sub_event` or `festival`)
> and includes `event_name` for display grouping. This parameter has no effect on festivals
> or flat events.
>
> For festivals (events with sub-events), pass `?include_children=true` to include all
> sub-event time slots. Each time slot is marked with `source` (`own` or the sub-event's
> `event_id`) and `event_name`. Used by cross_event section shift dialogs that need access
> to all time slots across the festival. This parameter has no effect on sub-events or
> flat events.
>
> Shifts on sub-event sections may reference parent festival time slots (e.g. for build-up
> shifts). Shifts on cross_event sections may reference any time slot from the festival or
> its sub-events. The `time_slot_id` validation accepts time slots accordingly.

## Shifts

- `GET /organisations/{org}/events/{event}/sections/{section}/shifts`
- `POST /organisations/{org}/events/{event}/sections/{section}/shifts`
- `PUT /organisations/{org}/events/{event}/sections/{section}/shifts/{shift}`
- `DELETE /organisations/{org}/events/{event}/sections/{section}/shifts/{shift}`
- `POST /organisations/{org}/events/{event}/sections/{section}/shifts/{shift}/assign`
- `POST /organisations/{org}/events/{event}/sections/{section}/shifts/{shift}/claim`

> **Festival context:** When managing shifts on a `cross_event` section, the `{event}`
> in the URL must be the parent festival's ID (matching `section.event_id`), not the
> sub-event's ID.

## Shift Assignments

- `GET /organisations/{org}/events/{event}/shift-assignments` — list assignments for event (paginated, 50/page)
- `POST /organisations/{org}/events/{event}/shift-assignments/{shiftAssignment}/approve` — approve pending assignment
- `POST /organisations/{org}/events/{event}/shift-assignments/{shiftAssignment}/reject` — reject pending assignment
- `POST /organisations/{org}/events/{event}/shift-assignments/{shiftAssignment}/cancel` — cancel assignment
- `POST /organisations/{org}/events/{event}/shift-assignments/bulk-approve` — bulk approve multiple assignments
- `GET /organisations/{org}/events/{event}/shifts/{shift}/assignable-persons` — list approved persons with availability status

### Assignable Persons

`GET /organisations/{org}/events/{event}/shifts/{shift}/assignable-persons`

Returns all approved persons for the event with availability status for this shift's time slot.
Persons are sorted: available first, then unavailable (conflict), then already assigned.

```json
{
  "data": [
    {
      "id": "ulid",
      "first_name": "Jan",
      "last_name": "de Vries",
      "full_name": "Jan de Vries",
      "email": "jan@gmail.com",
      "status": "approved",
      "crowd_type": { "id": "ulid", "name": "Vrijwilliger", "system_type": "VOLUNTEER" },
      "is_available": true,
      "already_assigned": false,
      "conflict": null
    },
    {
      "id": "ulid",
      "first_name": "Ahmed",
      "last_name": "Hassan",
      "full_name": "Ahmed Hassan",
      "email": "ahmed.h@gmail.com",
      "status": "approved",
      "crowd_type": { "id": "ulid", "name": "Vrijwilliger", "system_type": "VOLUNTEER" },
      "is_available": false,
      "already_assigned": false,
      "conflict": {
        "section_name": "EHBO",
        "shift_title": "EHBO Post",
        "time_slot_name": "Zaterdag Dag",
        "time": "10:00–18:00"
      }
    }
  ]
}
```

### Query Parameters (index)

- `status` — filter by assignment status (`pending_approval`, `approved`, `rejected`, `cancelled`, `completed`)
- `shift_id` — filter by shift
- `person_id` — filter by person
- `section_id` — filter by festival section

### Assign Body

`POST /organisations/{org}/events/{event}/sections/{section}/shifts/{shift}/assign`

```json
{ "person_id": "01JXYZ..." }
```

Organizer manually assigns a person. Assignment is pre-approved (status = `approved`).
Validates: shift must be `open`, capacity not full (`slots_total`), no time slot conflict.

### Claim Body

`POST /organisations/{org}/events/{event}/sections/{section}/shifts/{shift}/claim`

```json
{ "person_id": "01JXYZ..." }
```

Volunteer claims a shift. Status depends on `festival_section.crew_auto_accepts`:
- `true` → status = `approved`, `auto_approved = true`
- `false` → status = `pending_approval`

Validates: shift must be `open`, person must be `approved`, claiming capacity not full (`slots_open_for_claiming`), no time slot conflict.

### Reject Body

```json
{ "reason": "Onvoldoende ervaring voor deze rol." }
```

### Bulk Approve Body

```json
{ "assignment_ids": ["ulid1", "ulid2", ...] }
```

Response includes per-assignment result: `approved` or `skipped` (with reason).

### ShiftAssignmentResource

```json
{
  "id": "01JXYZ...",
  "shift_id": "01JXYZ...",
  "person_id": "01JXYZ...",
  "time_slot_id": "01JXYZ...",
  "status": "pending_approval",
  "auto_approved": false,
  "assigned_by": null,
  "assigned_at": "2026-04-10T12:00:00+00:00",
  "approved_by": null,
  "approved_at": null,
  "rejection_reason": null,
  "hours_expected": null,
  "hours_completed": null,
  "checked_in_at": null,
  "checked_out_at": null,
  "is_cancellable": true,
  "is_approvable": true,
  "created_at": "2026-04-10T12:00:00+00:00",
  "person": { "..." },
  "shift": { "..." }
}
```

### Status Transitions

- `pending_approval` → `approved`, `rejected`, `cancelled`
- `approved` → `cancelled`, `completed`
- `rejected` → (terminal)
- `cancelled` → (terminal)
- `completed` → (terminal)

### Authorization

| Action | Who |
|--------|-----|
| assign | org_admin, event_manager |
| claim | authenticated org member |
| approve / reject / bulk-approve | org_admin, event_manager |
| cancel | org_admin, event_manager, or the volunteer's own user |

## Volunteer Availabilities

- `GET /organisations/{org}/events/{event}/persons/{person}/availabilities` — list availabilities
- `POST /organisations/{org}/events/{event}/persons/{person}/availabilities/sync` — sync (replace all)

### Sync Body

```json
{
  "availabilities": [
    { "time_slot_id": "01JXYZ...", "preference_level": 5 },
    { "time_slot_id": "01JABC...", "preference_level": 2 }
  ]
}
```

Replaces all existing availabilities for the person. `preference_level` is optional (default: 3, range: 1–5).

Validates:
- All `time_slot_id`s must belong to the event (or parent festival)
- Time slot `person_type` must match the person's crowd type `system_type`

## Persons

- `GET /organisations/{org}/events/{event}/persons`
- `POST /organisations/{org}/events/{event}/persons`
- `GET /organisations/{org}/events/{event}/persons/{person}`
- `PUT /organisations/{org}/events/{event}/persons/{person}`
- `POST /organisations/{org}/events/{event}/persons/{person}/approve`
- `DELETE /organisations/{org}/events/{event}/persons/{person}`
- `POST /organisations/{org}/events/{event}/persons/from-member` — create person from org member
- `GET /organisations/{org}/members/available-for-event/{event}` — list members not yet added to event

### Create Person from Member

`POST /organisations/{org}/events/{event}/persons/from-member`

Creates a Person record from an existing organisation member. The person is created with `status: approved` and `user_id` pre-linked.

```json
{
  "user_id": "01JXYZ...",
  "crowd_type_id": "01JXYZ..."
}
```

Person data (first_name, last_name, email) is copied from the user account. Returns `PersonResource` (201).

**Validation:**
- User must belong to the organisation
- User must not already be a person at this event (422)
- crowd_type_id must belong to the organisation

### Available Members for Event

`GET /organisations/{org}/members/available-for-event/{event}`

Returns organisation members who do NOT yet have a Person record at the specified event. Used to populate the "Lid toevoegen" dialog.

```json
{
  "data": [
    {
      "id": "01JXYZ...",
      "first_name": "Jan",
      "last_name": "de Vries",
      "full_name": "Jan de Vries",
      "email": "jan@example.nl"
    }
  ]
}
```

Auth: org member or higher on the organisation.

## Identity Matches

### Endpoints

- `GET /organisations/{org}/identity-matches` — list pending matches for the organisation (paginated, 25 per page)
- `GET /organisations/{org}/persons/{person}/identity-match` — show pending match for a specific person
- `POST /organisations/{org}/identity-matches/{match}/confirm` — confirm a match (links `person.user_id`, dismisses other pending matches, syncs tags)
- `POST /organisations/{org}/identity-matches/{match}/dismiss` — dismiss a match (hidden, person stays unlinked, not re-suggested)
- `POST /organisations/{org}/identity-matches/{match}/revert` — revert a confirmed match (unlinks `person.user_id`, status → `reverted`)
- `POST /organisations/{org}/identity-matches/bulk-confirm` — bulk confirm multiple matches
- `POST /organisations/{org}/events/{event}/persons/{person}/manual-link` — manually link a person to a user account (body: `{ "user_id": "ulid" }`)
- `POST /organisations/{org}/events/{event}/persons/{person}/unlink` — unlink a person from their user account

### Match Types (`IdentityMatchMethod`)

| Value        | Description                          | Confidence |
| ------------ | ------------------------------------ | ---------- |
| `email`      | Exact email match within org         | `high`     |
| `name_fuzzy` | Levenshtein fuzzy name match         | `medium` (or `high` if DOB also matches) |
| `manual`     | Organiser-initiated manual link      | `high`     |

### Match Confidence (`IdentityMatchConfidence`)

| Value    | Description                                              |
| -------- | -------------------------------------------------------- |
| `high`   | High certainty — exact email, or fuzzy name + DOB match  |
| `medium` | Moderate certainty — fuzzy name match without DOB        |

### Match Status (`IdentityMatchStatus`)

| Value       | Description                                       |
| ----------- | ------------------------------------------------- |
| `pending`   | Awaiting organiser review                         |
| `confirmed` | Organiser confirmed — `person.user_id` is linked  |
| `dismissed` | Organiser dismissed — not re-suggested            |
| `reverted`  | Previously confirmed, then unlinked               |

### Detection

Matches are detected automatically via `PersonObserver`:
- **On Person create**: if person has no `user_id` and has an email or name, `PersonIdentityService::detectMatches()` runs
- **On Person email update**: if person's email changed and person is unlinked, detection re-runs
- **On user creation**: `PersonIdentityService::detectMatchesForUser()` finds all unlinked persons with matching email

Detection strategies (in priority order):
1. **Exact email** within same organisation → `email` / `high`
2. **Fuzzy name** (Levenshtein distance ≤2 for short names, ≤3 for longer) → `name_fuzzy` / `medium`
3. **Fuzzy name + DOB match** → upgrades to `high` confidence

No silent auto-linking. Every identity link requires explicit confirmation.

### Bulk Confirm

`POST /organisations/{org}/identity-matches/bulk-confirm`

Body: `{ "match_ids": ["ulid1", "ulid2", ...] }` (max 100)

Response: `{ "confirmed": 2, "errors": [{ "match_id": "ulid3", "error": "User already has a person record with this crowd type in this event." }] }`

### PersonResource enrichment

`GET /organisations/{org}/events/{event}/persons` now includes:

```json
{
  "has_user_account": true,
  "user_account": { "id": "ulid", "email": "jan@example.nl", "full_name": "Jan de Vries" },
  "pending_identity_match": {
    "match_id": "ulid",
    "matched_user": { "id": "ulid", "first_name": "Jan", "last_name": "de Vries", "full_name": "Jan de Vries", "email": "jan@example.nl", "date_of_birth": "1990-01-01" },
    "matched_on": "email",
    "matched_on_label": "E-mail match",
    "confidence": "high",
    "confidence_label": "Hoge zekerheid",
    "match_details": { "matched_fields": ["email"], "..." : "..." }
  }
}
```

## Crowd Lists

- `GET /organisations/{org}/events/{event}/crowd-lists` — list all crowd lists for event (includes `persons_count`)
- `POST /organisations/{org}/events/{event}/crowd-lists` — create crowd list
- `PUT /organisations/{org}/events/{event}/crowd-lists/{list}` — update crowd list
- `DELETE /organisations/{org}/events/{event}/crowd-lists/{list}` — delete crowd list
- `GET /organisations/{org}/events/{event}/crowd-lists/{list}/persons` — list persons on a crowd list (paginated, 50/page, includes `crowd_list_pivot`)
- `POST /organisations/{org}/events/{event}/crowd-lists/{list}/persons` — add person to list
- `DELETE /organisations/{org}/events/{event}/crowd-lists/{list}/persons/{person}` — remove person from list

### Create/Update Body

```json
{
  "crowd_type_id": "01JXYZ...",
  "name": "VIP Gastenlijst",
  "type": "internal|external",
  "recipient_company_id": "01JXYZ... (nullable, for external lists)",
  "auto_approve": false,
  "max_persons": 50
}
```

### Add Person Body

```json
{
  "person_id": "01JXYZ..."
}
```

**Business rules:**
- `max_persons`: when set, adding a person beyond the limit returns 422
- `auto_approve`: when true, adding a person with status `pending` automatically sets their status to `approved`
- Duplicate person on same list returns 422

### CrowdListResource

```json
{
  "id": "01JXYZ...",
  "event_id": "01JXYZ...",
  "crowd_type_id": "01JXYZ...",
  "name": "VIP Gastenlijst",
  "type": "internal",
  "recipient_company_id": null,
  "auto_approve": false,
  "max_persons": 50,
  "is_full": false,
  "created_at": "2026-04-10T12:00:00+00:00",
  "persons_count": 12
}
```

## Locations

- `GET /organisations/{org}/events/{event}/locations`
- `POST /organisations/{org}/events/{event}/locations`
- `PUT /organisations/{org}/events/{event}/locations/{location}`
- `DELETE /organisations/{org}/events/{event}/locations/{location}`

## Person Tags (Organisation Settings)

- `GET /organisations/{org}/person-tags` — list active tags (ordered)
- `POST /organisations/{org}/person-tags` — create tag
- `PUT /organisations/{org}/person-tags/{tag}` — update tag
- `DELETE /organisations/{org}/person-tags/{tag}` — deactivate tag (soft: sets `is_active = false`)
- `GET /organisations/{org}/person-tag-categories` — distinct categories for autocomplete

## User Tag Assignments

- `GET /organisations/{org}/users/{user}/tags` — list all tags for user in organisation
- `POST /organisations/{org}/users/{user}/tags` — assign a tag
- `DELETE /organisations/{org}/users/{user}/tags/{tagAssignment}` — remove assignment
- `PUT /organisations/{org}/users/{user}/tags/sync` — sync tags by source

> **Sync endpoint:** Replaces tags of the specified `source` only.
> Body: `{ "tag_ids": ["ulid1", "ulid2"], "source": "self_reported" }`
> Removes `self_reported` tags not in the list, adds new ones, leaves `organiser_assigned` untouched (and vice versa).

### Person list tag filtering

- `GET /organisations/{org}/events/{event}/persons?tag={person_tag_id}` — filter persons by single tag
- `GET /organisations/{org}/events/{event}/persons?tags=ulid1,ulid2` — filter persons by multiple tags (AND logic: must have all)

## Public Registration Data

- `GET /public/events/{slug}/registration-data` — public, no auth. Returns event info, available sections, and volunteer time slots for the registration form. Only returns events with status `registration_open`. Only includes sections with `show_in_registration = true` and `type = standard`. For festivals: returns child event sections only (deduplicated by name), excluding parent operational sections. Only includes time slots with `person_type = VOLUNTEER`. Resolves sub-events to parent festival.

### Response

```json
{
  "data": {
    "event": { "id": "01JXYZ...", "name": "Echt Feesten 2026", "start_date": "2026-07-10", "end_date": "2026-07-12", "organisation_id": "01JXYZ..." },
    "sections": [{ "id": "01JXYZ...", "name": "Hoofdpodium Bar", "category": "Bar", "icon": "tabler-glass", "registration_description": "Tap bier en drankjes voor festivalgangers" }],
    "time_slots": [{ "id": "01JXYZ...", "name": "Vrijdag Avond", "date": "2026-07-10", "start_time": "18:00:00", "end_time": "02:00:00", "duration_hours": 8 }]
  }
}
```

### Error Responses

- `404` — Event not found or not accepting registrations

## Volunteer Registration

- `POST /events/{event}/volunteer-register` — public, auth-aware (optional Sanctum). Registers a volunteer for an event. Resolves sub-events to the parent festival. Accepts name, email, phone, tshirt_size, motivation, section_preferences, availabilities. Authenticated users have their name/email taken from the auth token. Returns `PersonResource` (201 on new, 200 on re-registration of rejected person).

## Portal

- `POST /portal/token-auth` — public. Validates a portal token against artists/production_requests tables. Returns `{ context, data, event }` on success. Returns 501 if token tables don't exist yet, 401 if token is invalid.
- `GET /portal/me` — auth:sanctum. Returns the authenticated user's person record for a given event. Query param: `event_id` (required, ULID). Resolves sub-events to parent festival. Returns `PersonResource` with crowdType, shiftAssignments, and volunteerAvailabilities eager-loaded. Returns 404 if no registration found.
- `GET /portal/my-shifts` — auth:sanctum. Returns all active shift assignments across all events for the authenticated user. Finds all Person records linked via `user_id` (approved/pending status), then returns their active assignments (approved/pending_approval). Response grouped by event → date.
- `GET /portal/events/{event}/available-shifts` — auth:sanctum. Returns shifts available to claim, grouped by date → time slot. Requires approved person status.
- `GET /portal/events/{event}/my-shifts` — auth:sanctum. Returns the user's shift assignments for a specific event, categorized as upcoming/past/cancelled.
- `POST /portal/events/{event}/shifts/{shift}/claim` — auth:sanctum. Claim a shift. Returns assignment with status (pending_approval or approved based on section auto-accept).
- `POST /portal/events/{event}/assignments/{shiftAssignment}/cancel` — auth:sanctum. Cancel own assignment. Must be future and cancellable status.

### Portal My-Shifts Response

```json
{
  "data": [
    {
      "event": { "id": "ulid", "name": "Festival X", "start_date": "2026-07-01", "end_date": "2026-07-03" },
      "assignments": [
        {
          "date": "2026-07-01",
          "date_label": "Woensdag 1 juli",
          "shifts": [
            {
              "id": "ulid",
              "status": "approved",
              "shift": {
                "id": "ulid",
                "title": "Tapper",
                "section_name": "Bar",
                "section_icon": "tabler-beer",
                "time_slot_name": "Avond",
                "date": "2026-07-01",
                "start_time": "18:00",
                "end_time": "23:00",
                "report_time": "17:30",
                "location": { "name": "Hoofdpodium", "address": "Festivalplein 1" }
              }
            }
          ]
        }
      ]
    }
  ]
}
```

## Registration Field Templates (Organisation Settings)

- `GET /organisations/{org}/registration-field-templates` — list active templates (ordered)
- `POST /organisations/{org}/registration-field-templates` — create template
- `PUT /organisations/{org}/registration-field-templates/{template}` — update template
- `DELETE /organisations/{org}/registration-field-templates/{template}` — delete (org-created) or deactivate (system)

> Templates: organisation-level reusable field definitions. System templates
> are seeded on org creation. Org-admins can customize and add their own.

## Registration Form Fields (Event Settings)

- `GET /organisations/{org}/events/{event}/registration-fields` — list all fields (ordered by sort_order)
- `POST /organisations/{org}/events/{event}/registration-fields` — create field (manually or from template)
- `POST /organisations/{org}/events/{event}/registration-fields/from-template` — create field from template
- `PUT /organisations/{org}/events/{event}/registration-fields/{field}` — update field
- `DELETE /organisations/{org}/events/{event}/registration-fields/{field}` — delete field definition (answers preserved)
- `POST /organisations/{org}/events/{event}/registration-fields/reorder` — bulk reorder
- `POST /organisations/{org}/events/{event}/registration-fields/import-from-event` — copy fields from another event

### From-Template Body

```json
{ "template_id": "ulid" }
```

Creates a COPY of the template as an event field. The copy is independent — changes don't propagate back to the template.

### Import Body

```json
{ "source_event_id": "ulid" }
```

Copies all `registration_form_fields` from the source event. Source must belong to the same organisation. Existing fields on the target event are kept.

### Tag Picker Fields

For `tag_picker` fields: the API response includes `available_tags` array (from `person_tags`, filtered by `tag_category` if set) so the frontend knows which tags to render as options.

## Person Field Values

- `GET /organisations/{org}/events/{event}/persons/{person}/field-values` — all answers for a person
- `PUT /organisations/{org}/events/{event}/persons/{person}/field-values` — bulk upsert answers

### Bulk Upsert Body

```json
{
  "values": {
    "field_slug": "value_or_array",
    "shirtmaat": "L",
    "dieetwensen": ["Vegetarisch", "Glutenvrij"],
    "certificaten": ["01JXYZ...", "01JABC..."]
  }
}
```

Replaces all field values for this person in one request. Used by both the registration form and the organiser backend. For `tag_picker` fields: values are arrays of `person_tag_id` ULIDs. If person has a `user_id`, tag sync is triggered automatically.

## Person Section Preferences

- `GET /organisations/{org}/events/{event}/persons/{person}/section-preferences` — list preferences
- `PUT /organisations/{org}/events/{event}/persons/{person}/section-preferences` — replace all preferences

### Replace Body

```json
{
  "preferences": [
    { "festival_section_id": "01JXYZ...", "priority": 1 },
    { "festival_section_id": "01JABC...", "priority": 2 },
    { "festival_section_id": "01JDEF...", "priority": 3 }
  ]
}
```

## Person List Filtering (extended)

Additional filter parameters on `GET /organisations/{org}/events/{event}/persons`:

- `?field[slug]=value` — filter by registration field value (exact match for single-value, `JSON_CONTAINS` for multiselect)
- `?section_preference={section_id}` — filter by section preference (has this section as any priority)
- `?has_preference=true` — only persons who submitted section preferences

_(Extend this contract per module as endpoints are implemented.)_