Merge branch 'phase/80-nurse-health-ui'

2026-08-21 20:29:12 +03:00
parent 3e52a8cac5 dabd68844b
commit 0e2a662fb7
34 changed files with 1569 additions and 35 deletions
@@ -42,7 +42,8 @@ public readonly record struct ActorState(
    Intent Intent,
    bool LunchWindowOpen = false,
    ApparelActor Apparel = default,
-    TalkPlannerContext Talk = default);
+    TalkPlannerContext Talk = default,
+    float SocialWeightFactor = 1f);

 /// <summary>
 /// Picks a goal by weight and plans walk-then-do. No world, no clock — a table of inputs to an
@@ -301,7 +302,18 @@ public static class DecisionPlanner
            return Intent.None;
        }

-        return new Intent(GoalKind.Leisure, action.DefName, action.Weight, action.DefName);
+        var weight = action.Weight;
+        if (TalkActions.IsTalk(action.DefName) && state.SocialWeightFactor != 1f)
+        {
+            weight *= Math.Max(0f, state.SocialWeightFactor);
+        }
+
+        if (weight <= 0)
+        {
+            return Intent.None;
+        }
+
+        return new Intent(GoalKind.Leisure, action.DefName, weight, action.DefName);
    }

    private static Decision Continue(ActorState state)
@@ -0,0 +1,122 @@
+using HSchool.Content;
+using HSchool.People;
+
+namespace HSchool.Ai;
+
+/// <summary>
+/// Pure map / roster helpers for nurse visits. Queue state lives on the school worker.
+/// Simpler than director summons: no hearing opinion, tend while co-located.
+/// </summary>
+public static class NurseCare
+{
+    /// <summary>Presence / card label while walking to the wait node or office.</summary>
+    public const string GoingAction = "GoingToNurse";
+
+    /// <summary>Presence / card label while queued in the corridor.</summary>
+    public const string WaitingAction = "WaitForNurse";
+
+    /// <summary>Presence / card label while being tended in the office.</summary>
+    public const string CareAction = "NurseCare";
+
+    public const byte PresenceNone = 0;
+
+    public const byte PresenceGoing = 1;
+
+    public const byte PresenceWaiting = 2;
+
+    public const byte PresenceCare = 3;
+
+    public const string OfficeRoomDef = "MedicalOffice";
+
+    public const string CorridorRoomDef = "Corridor";
+
+    public const string MedicineSkill = "Medicine";
+
+    public static string? OfficeNodeId(MapLayout map)
+    {
+        ArgumentNullException.ThrowIfNull(map);
+        return map.Rooms
+            .Where(room => room.Def.Equals(OfficeRoomDef, StringComparison.Ordinal))
+            .Select(room => room.Id)
+            .OrderBy(id => id, StringComparer.Ordinal)
+            .FirstOrDefault();
+    }
+
+    /// <summary>
+    /// Corridor (or other neighbour) where the queue waits — never inside the office.
+    /// </summary>
+    public static string? WaitNodeId(MapLayout map, string? officeNodeId = null)
+    {
+        ArgumentNullException.ThrowIfNull(map);
+        officeNodeId ??= OfficeNodeId(map);
+        if (officeNodeId is null)
+        {
+            return null;
+        }
+
+        string? bestCorridor = null;
+        string? bestAny = null;
+        foreach (var link in map.Links)
+        {
+            var other = OtherEnd(link, officeNodeId);
+            if (other is null)
+            {
+                continue;
+            }
+
+            bestAny = PickOrdinal(bestAny, other);
+            if (map.NodeDef(other) is { } def
+                && def.Equals(CorridorRoomDef, StringComparison.Ordinal))
+            {
+                bestCorridor = PickOrdinal(bestCorridor, other);
+            }
+        }
+
+        return bestCorridor ?? bestAny;
+    }
+
+    public static bool HasHiredNurse(Roster roster) =>
+        roster.People.Any(person =>
+            person.IsStaff
+            && Staffing.NursePosition.Equals(person.Position, StringComparison.Ordinal));
+
+    public static string? NurseId(Roster roster) =>
+        roster.People
+            .Where(person =>
+                person.IsStaff
+                && Staffing.NursePosition.Equals(person.Position, StringComparison.Ordinal))
+            .Select(person => person.Id)
+            .OrderBy(id => id, StringComparer.Ordinal)
+            .FirstOrDefault();
+
+    public static float MedicineOf(Person? nurse) =>
+        nurse is not null && nurse.Skills.TryGetValue(MedicineSkill, out var level) ? level : 0f;
+
+    public static bool CanStart(Roster roster, MapLayout map) =>
+        HasHiredNurse(roster) && OfficeNodeId(map) is not null && WaitNodeId(map) is not null;
+
+    private static string? OtherEnd(MapLink link, string nodeId)
+    {
+        if (link.A.Equals(nodeId, StringComparison.Ordinal))
+        {
+            return link.B;
+        }
+
+        if (link.B.Equals(nodeId, StringComparison.Ordinal))
+        {
+            return link.A;
+        }
+
+        return null;
+    }
+
+    private static string PickOrdinal(string? current, string candidate)
+    {
+        if (current is null)
+        {
+            return candidate;
+        }
+
+        return string.CompareOrdinal(candidate, current) < 0 ? candidate : current;
+    }
+}
@@ -212,6 +212,7 @@ const ru = {
  peopleTabNow: 'Сейчас',
  peopleTabConnections: 'Связи',
  peopleTabGradebook: 'Журнал',
+  peopleTabHealth: 'Здоровье',
  peopleTabPortrait: 'Портрет',
  peopleConnectionsFriends: 'Друзья',
  peopleConnectionsEnemies: 'Враги',
@@ -244,6 +245,11 @@ const ru = {
  peopleGradebookSubject: 'Предмет',
  peopleGradebookMark: 'Оценка',
  peopleGradebookStatus: 'Статус',
+  peopleHealthEmpty: 'Активных состояний нет.',
+  peopleHealthCondition: 'Состояние',
+  peopleHealthSeverity: 'Тяжесть',
+  peopleHealthEffect: 'Эффект',
+  peopleHealthEffectNone: '—',
  classGradebookAverage: 'средний {mark}',
  classGradebookNoMarks: 'оценок пока нет',
  classGradebookAbsences: 'прогулов {n}',
@@ -637,6 +643,7 @@ const en: Messages = {
  peopleTabNow: 'Now',
  peopleTabConnections: 'Connections',
  peopleTabGradebook: 'Gradebook',
+  peopleTabHealth: 'Health',
  peopleTabPortrait: 'Portrait',
  peopleConnectionsFriends: 'Friends',
  peopleConnectionsEnemies: 'Enemies',
@@ -669,6 +676,11 @@ const en: Messages = {
  peopleGradebookSubject: 'Subject',
  peopleGradebookMark: 'Mark',
  peopleGradebookStatus: 'Status',
+  peopleHealthEmpty: 'No active conditions.',
+  peopleHealthCondition: 'Condition',
+  peopleHealthSeverity: 'Severity',
+  peopleHealthEffect: 'Effect',
+  peopleHealthEffectNone: '—',
  classGradebookAverage: 'avg {mark}',
  classGradebookNoMarks: 'no marks yet',
  classGradebookAbsences: 'absences {n}',
@@ -363,6 +363,8 @@ export interface PersonCard {
  readonly lessonMarks?: readonly LessonMarkEntry[] | null;
  /** Recent attendance rows — same order as the world list. */
  readonly attendance?: readonly AttendanceEntry[] | null;
+  /** Active medical conditions — same order as the world list. */
+  readonly healthConditions?: readonly HealthConditionEntry[] | null;
 }

 export interface OffenseEntry {
@@ -373,6 +375,15 @@ export interface OffenseEntry {
  readonly otherFullName: string | null;
 }

+export interface HealthConditionEntry {
+  readonly defName: string;
+  readonly label: string;
+  readonly severity: number;
+  readonly progress: number;
+  readonly stageLabel: string | null;
+  readonly effect: string | null;
+}
+
 export interface LessonMarkEntry {
  readonly subject: string;
  readonly subjectLabel: string;
@@ -530,4 +530,42 @@ describe('renderPersonCard', () => {
    expect(panel?.textContent).toContain(t('peopleGradebookMarks'));
    expect(panel?.textContent).toContain(t('peopleGradebookAttendance'));
  });
+
+  it('shows empty health placeholder when conditions are missing', () => {
+    setLocale('ru');
+    const root = document.createElement('div');
+    renderPersonCard(root, card({ healthConditions: [] }), () => {}, options({ tab: 'health' }));
+
+    expect(tabButton(root, 'health').textContent).toBe(t('peopleTabHealth'));
+    expect(root.textContent).toContain(t('peopleHealthEmpty'));
+  });
+
+  it('lists active health conditions on the health tab', () => {
+    setLocale('ru');
+    const root = document.createElement('div');
+    renderPersonCard(
+      root,
+      card({
+        healthConditions: [
+          {
+            defName: 'CommonCold',
+            label: 'ОРВИ',
+            severity: 0.55,
+            progress: 0.2,
+            stageLabel: null,
+            effect: 'Слабость, реже болтает',
+          },
+        ],
+      }),
+      () => {},
+      options({ tab: 'health' }),
+    );
+
+    const panel = root.querySelector('[data-card-tab="health"]');
+    expect(panel).not.toBeNull();
+    expect((panel as HTMLElement).hidden).toBe(false);
+    expect(panel?.textContent).toContain('ОРВИ');
+    expect(panel?.textContent).toContain('55%');
+    expect(panel?.textContent).toContain('Слабость, реже болтает');
+  });
 });
@@ -6,6 +6,7 @@ import { fillApparel } from './personCardApparel.ts';
 import { fillCarry } from './personCardCarry.ts';
 import { fillConnections } from './personCardConnections.ts';
 import { fillGradebook } from './personCardGradebook.ts';
+import { fillHealth } from './personCardHealth.ts';
 import { fillNow } from './personCardNow.ts';
 import { fillOverview } from './personCardOverview.ts';
 import { fillPortrait } from './personCardPortrait.ts';
@@ -25,6 +26,7 @@ export type PersonCardTab =
  | 'now'
  | 'connections'
  | 'gradebook'
+  | 'health'
  | 'portrait';

 export interface RenderPersonCardOptions {
@@ -124,6 +126,7 @@ export function renderPersonCard(
    now: el('div', { class: 'people__tab-panel', dataset: { cardTab: 'now' } }),
    connections: el('div', { class: 'people__tab-panel', dataset: { cardTab: 'connections' } }),
    gradebook: el('div', { class: 'people__tab-panel', dataset: { cardTab: 'gradebook' } }),
+    health: el('div', { class: 'people__tab-panel', dataset: { cardTab: 'health' } }),
    portrait: el('div', { class: 'people__tab-panel people__portrait-panel', dataset: { cardTab: 'portrait' } }),
  };

@@ -134,6 +137,7 @@ export function renderPersonCard(
    now: 'peopleTabNow',
    connections: 'peopleTabConnections',
    gradebook: 'peopleTabGradebook',
+    health: 'peopleTabHealth',
    portrait: 'peopleTabPortrait',
  };

@@ -160,6 +164,7 @@ export function renderPersonCard(
  fillNow(panels.now, card, options.away === true, tab === 'now' ? options.log : null, options);
  fillConnections(panels.connections, card, onRelative, options);
  fillGradebook(panels.gradebook, card);
+  fillHealth(panels.health, card);
  fillPortrait(panels.portrait, card, options);

  const showTab = (next: PersonCardTab): void => {
@@ -188,6 +193,7 @@ export function renderPersonCard(
    panels.now,
    panels.connections,
    panels.gradebook,
+    panels.health,
    panels.portrait,
  );
 }
@@ -0,0 +1,51 @@
+import type { HealthConditionEntry, PersonCard } from '../net/api.ts';
+import { t } from '../i18n/strings.ts';
+import { el } from './dom.ts';
+
+export function fillHealth(parent: HTMLElement, card: PersonCard): void {
+  const rows = card.healthConditions ?? [];
+  if (rows.length === 0) {
+    parent.append(el('p', { class: 'panel__empty', text: t('peopleHealthEmpty') }));
+    return;
+  }
+
+  const table = el('table', { class: 'people__health' });
+  const body = el('tbody');
+  table.append(
+    el(
+      'thead',
+      {},
+      el(
+        'tr',
+        {},
+        el('th', { text: t('peopleHealthCondition') }),
+        el('th', { text: t('peopleHealthSeverity') }),
+        el('th', { text: t('peopleHealthEffect') }),
+      ),
+    ),
+    body,
+  );
+
+  for (const row of rows) {
+    body.append(conditionRow(row));
+  }
+
+  parent.append(table);
+}
+
+function conditionRow(row: HealthConditionEntry): HTMLElement {
+  const severityPct = Math.round(Math.max(0, Math.min(1, row.severity)) * 100);
+  const severityText =
+    row.stageLabel !== null && row.stageLabel.length > 0
+      ? `${severityPct}% · ${row.stageLabel}`
+      : `${severityPct}%`;
+  const effect =
+    row.effect !== null && row.effect.length > 0 ? row.effect : t('peopleHealthEffectNone');
+  return el(
+    'tr',
+    {},
+    el('td', { text: row.label }),
+    el('td', { text: severityText }),
+    el('td', { text: effect }),
+  );
+}
@@ -94,6 +94,7 @@ const CARD_TABS: readonly PersonCardTab[] = [
  'now',
  'connections',
  'gradebook',
+  'health',
  'portrait',
 ];
 const LOG_DIRS: readonly PersonLogDir[] = ['asc', 'desc'];
@@ -92,8 +92,20 @@ internal static class DiseaseDefValidator
                        $"DiseaseDef '{def.DefName}' warmthDecayFactor cannot be negative.");
                }

+                if (stage.TalkWeightFactor < 0f)
+                {
+                    throw new ContentLoadException(
+                        $"DiseaseDef '{def.DefName}' talkWeightFactor cannot be negative.");
+                }
+
                previous = stage;
            }
+
+            if (def.NurseSeekSeverity < 0f || def.NurseSeekSeverity > 1f)
+            {
+                throw new ContentLoadException(
+                    $"DiseaseDef '{def.DefName}' nurseSeekSeverity must be 0–1.");
+            }
        }
    }
 }
@@ -28,6 +28,15 @@ public sealed class DiseaseStage

    /// <summary>Multiplies Warmth decay. 1 = unchanged.</summary>
    public float WarmthDecayFactor { get; init; } = 1f;
+
+    /// <summary>
+    /// Multiplies Chat / talk leisure weight and talk-circle start pull. 1 = unchanged; lower when
+    /// symptoms make conversation harder.
+    /// </summary>
+    public float TalkWeightFactor { get; init; } = 1f;
+
+    /// <summary>Locale key for the person-card effect line. Empty — card shows severity only.</summary>
+    public string Effect { get; init; } = "";
 }

 /// <summary>
@@ -72,4 +81,18 @@ public sealed class DiseaseDef : Def

    /// <summary>When true, the carrier can infect during incubation before stage effects apply.</summary>
    public bool ContagiousDuringIncubation { get; init; }
+
+    /// <summary>
+    /// After incubation, severity at or above this sends the person toward the nurse's office.
+    /// </summary>
+    public float NurseSeekSeverity { get; init; } = 0.35f;
+
+    /// <summary>
+    /// Extra severity change per day while a nurse tends (usually negative). 0 — care only
+    /// advances progress.
+    /// </summary>
+    public float TendSeverityPerDay { get; init; }
+
+    /// <summary>Extra progress per day while a nurse tends (speeds recovery / immunity).</summary>
+    public float TendProgressPerDay { get; init; }
 }
@@ -793,6 +793,12 @@ internal static class PeopleDefValidator
            throw new ContentLoadException(
                $"BehaviorDef '{behavior.DefName}' diseaseOutbreakMinNewCases cannot be negative.");
        }
+
+        if (behavior.NurseTendMedicineScale < 0f)
+        {
+            throw new ContentLoadException(
+                $"BehaviorDef '{behavior.DefName}' nurseTendMedicineScale cannot be negative.");
+        }
    }

    private static void ValidateTopic(TopicDef topic, DefCatalog catalog)
@@ -694,6 +694,12 @@ public sealed class BehaviorDef : Def
    /// </summary>
    public int DiseaseOutbreakMinNewCases { get; init; } = 3;

+    /// <summary>
+    /// Scales nurse tend deltas by Medicine skill: factor = this * (0.5 + Medicine/100).
+    /// Missing keeps 1.
+    /// </summary>
+    public float NurseTendMedicineScale { get; init; } = 1f;
+
    public static IReadOnlyList<float> DefaultLessonMarkThresholds { get; } =
    [
        0.85f,
@@ -160,4 +160,177 @@ public static class DiseaseEffects

        return factor;
    }
+
+    /// <summary>
+    /// Product of incubated stage talk factors (1 when healthy). Strong symptoms shrink Chat weight.
+    /// </summary>
+    public static float TalkWeightFactor(Person person, DefCatalog catalog, DateTime now)
+    {
+        ArgumentNullException.ThrowIfNull(person);
+        ArgumentNullException.ThrowIfNull(catalog);
+        var list = person.Conditions;
+        if (list is null || list.Count == 0)
+        {
+            return 1f;
+        }
+
+        var factor = 1f;
+        foreach (var condition in list)
+        {
+            if (!catalog.Diseases.TryGetValue(condition.DefName, out var disease) || disease.Abstract)
+            {
+                continue;
+            }
+
+            if (!IsIncubated(condition, disease, now) || !TryStage(disease, condition.Severity, out var stage))
+            {
+                continue;
+            }
+
+            factor *= stage.TalkWeightFactor;
+        }
+
+        return factor;
+    }
+
+    /// <summary>
+    /// Highest incubated severity that meets its DiseaseDef nurse-seek threshold, or null when none.
+    /// </summary>
+    public static HealthCondition? ConditionNeedingNurse(Person person, DefCatalog catalog, DateTime now)
+    {
+        ArgumentNullException.ThrowIfNull(person);
+        ArgumentNullException.ThrowIfNull(catalog);
+        var list = person.Conditions;
+        if (list is null || list.Count == 0)
+        {
+            return null;
+        }
+
+        HealthCondition? worst = null;
+        foreach (var condition in list)
+        {
+            if (!catalog.Diseases.TryGetValue(condition.DefName, out var disease) || disease.Abstract)
+            {
+                continue;
+            }
+
+            if (!IsIncubated(condition, disease, now))
+            {
+                continue;
+            }
+
+            if (condition.Severity + 1e-6f < disease.NurseSeekSeverity)
+            {
+                continue;
+            }
+
+            if (worst is null || condition.Severity > worst.Severity)
+            {
+                worst = condition;
+            }
+        }
+
+        return worst;
+    }
+
+    /// <summary>
+    /// Medicine-scaled tend for one game-minute slice. Same peopleSeed + person + day → same curve.
+    /// </summary>
+    public static bool Tend(
+        Person person,
+        int peopleSeed,
+        int dayNumber,
+        double gameMinutes,
+        DefCatalog catalog,
+        float medicineSkill,
+        DateTime now,
+        float medicineScale = 1f)
+    {
+        ArgumentNullException.ThrowIfNull(person);
+        ArgumentNullException.ThrowIfNull(catalog);
+        var list = person.Conditions;
+        if (list is null || list.Count == 0 || gameMinutes <= 0)
+        {
+            return false;
+        }
+
+        var daySeed = Seed.Mix(peopleSeed, person.Id, dayNumber, Seed.NurseSalt);
+        var unit = (daySeed & int.MaxValue) / (float)int.MaxValue;
+        var dayFactor = 0.5f + unit;
+        var skillFactor = medicineScale * (0.5f + Math.Clamp(medicineSkill, 0f, 100f) / 100f);
+        var days = gameMinutes / (24d * 60d);
+        var changed = false;
+        List<HealthCondition>? recovered = null;
+        var clock = DateTime.SpecifyKind(now, DateTimeKind.Utc);
+
+        foreach (var condition in list)
+        {
+            if (!catalog.Diseases.TryGetValue(condition.DefName, out var disease) || disease.Abstract)
+            {
+                continue;
+            }
+
+            if (!IsIncubated(condition, disease, clock))
+            {
+                continue;
+            }
+
+            var severityDelta = (float)(disease.TendSeverityPerDay * dayFactor * skillFactor * days);
+            var progressDelta = (float)(disease.TendProgressPerDay * dayFactor * skillFactor * days);
+            if (severityDelta == 0f && progressDelta == 0f)
+            {
+                continue;
+            }
+
+            var nextSeverity = Math.Clamp(condition.Severity + severityDelta, 0f, 1f);
+            var nextProgress = Math.Clamp(condition.Progress + progressDelta, 0f, 1f);
+            if (nextSeverity == condition.Severity && nextProgress == condition.Progress)
+            {
+                continue;
+            }
+
+            condition.Severity = nextSeverity;
+            condition.Progress = nextProgress;
+            changed = true;
+
+            if (nextProgress >= 1f)
+            {
+                recovered ??= [];
+                recovered.Add(condition);
+            }
+        }
+
+        if (recovered is null)
+        {
+            return changed;
+        }
+
+        foreach (var done in recovered)
+        {
+            list.Remove(done);
+            if (diseaseImmunity(done.DefName, catalog, out var disease)
+                && disease.ImmunityDays > 0f)
+            {
+                DiseaseImmunities.Grant(person, done.DefName, clock.AddDays(disease.ImmunityDays));
+            }
+        }
+
+        if (list.Count == 0)
+        {
+            person.Conditions = null;
+        }
+
+        return true;
+
+        static bool diseaseImmunity(string defName, DefCatalog catalog, out DiseaseDef disease)
+        {
+            if (catalog.Diseases.TryGetValue(defName, out disease!) && !disease.Abstract)
+            {
+                return true;
+            }
+
+            disease = null!;
+            return false;
+        }
+    }
 }
@@ -28,6 +28,7 @@ public static class Seed
    public const int DiseaseSalt = 20;
    public const int ContagionSalt = 21;
    public const int GradeTrailSalt = 22;
+    public const int NurseSalt = 23;

    /// <summary>A stream that belongs to the school rather than to one family.</summary>
    public static int ForSchool(int schoolSeed, int salt) => Mix(schoolSeed, familyIndex: -1, salt);
@@ -45,6 +45,8 @@ public static class Staffing

    public const string PrincipalPosition = "Principal";

+    public const string NursePosition = "Nurse";
+
    public static StaffingOutcome UnknownSchool() =>
        Fail(StaffingError.UnknownSchool, new Roster([], [], []), ApplicantPool.Empty, allocated: 0, payroll: 0, attempted: 0);

@@ -90,7 +90,8 @@ internal sealed record PersonCardResponse(
    string? ClassTeacherName = null,
    IReadOnlyList<OffenseEntryResponse>? Offenses = null,
    IReadOnlyList<LessonMarkEntryResponse>? LessonMarks = null,
-    IReadOnlyList<AttendanceEntryResponse>? Attendance = null);
+    IReadOnlyList<AttendanceEntryResponse>? Attendance = null,
+    IReadOnlyList<HealthConditionEntryResponse>? HealthConditions = null);

 internal sealed record OffenseEntryResponse(
    string Kind,
@@ -99,6 +100,15 @@ internal sealed record OffenseEntryResponse(
    string? OtherPersonId,
    string? OtherFullName);

+/// <summary>One active medical condition on the person card (slice 14 phase 80).</summary>
+internal sealed record HealthConditionEntryResponse(
+    string DefName,
+    string Label,
+    float Severity,
+    float Progress,
+    string? StageLabel,
+    string? Effect);
+
 /// <summary>One recent lesson mark on the person card. Same order as the world list.</summary>
 internal sealed record LessonMarkEntryResponse(
    string Subject,
@@ -63,6 +63,7 @@ internal static partial class PersonCardReader
        var skills = LiveSkills(school.World, personId);
        var activityId = LiveActivity(school.World, personId)
            ?? school.DirectorSummonPresenceActionId(personId)
+            ?? school.NurseCarePresenceActionId(personId)
            ?? school.ParentMeetingPresenceActionId(personId);
        string? activityLabel = null;
        if (activityId is not null && catalog is not null && catalog.Actions.TryGetValue(activityId, out var action))
@@ -113,7 +114,75 @@ internal static partial class PersonCardReader
            ClassTeacherName: classTeacherName,
            Offenses: Offenses(roster, person, catalog, locale),
            LessonMarks: LessonMarks(person, catalog, locale),
-            Attendance: Attendance(person, catalog, locale));
+            Attendance: Attendance(person, catalog, locale),
+            HealthConditions: Health(person, catalog, locale, school.Clock.Time));
+    }
+
+    private static IReadOnlyList<HealthConditionEntryResponse> Health(
+        Person person,
+        DefCatalog? catalog,
+        string locale,
+        DateTime now)
+    {
+        var rows = person.Conditions;
+        if (rows is null || rows.Count == 0)
+        {
+            return [];
+        }
+
+        var result = new HealthConditionEntryResponse[rows.Count];
+        for (var i = 0; i < rows.Count; i++)
+        {
+            var row = rows[i];
+            string label = row.DefName;
+            string? stageLabel = null;
+            string? effect = null;
+            if (catalog is not null && catalog.Diseases.TryGetValue(row.DefName, out var disease))
+            {
+                label = catalog.Label(locale, disease);
+                if (DiseaseEffects.TryStage(disease, row.Severity, out var stage))
+                {
+                    stageLabel = StageLabel(catalog, locale, row.DefName, stage);
+                    effect = EffectLabel(catalog, locale, stage);
+                }
+            }
+
+            result[i] = new HealthConditionEntryResponse(
+                row.DefName,
+                label,
+                row.Severity,
+                row.Progress,
+                stageLabel,
+                effect);
+        }
+
+        return result;
+    }
+
+    private static string? StageLabel(DefCatalog catalog, string locale, string defName, DiseaseStage stage)
+    {
+        var key = $"{defName}.stage.{stage.MinSeverity:0.##}";
+        if (catalog.HasText(locale, key))
+        {
+            return catalog.Text(locale, key);
+        }
+
+        return null;
+    }
+
+    private static string? EffectLabel(DefCatalog catalog, string locale, DiseaseStage stage)
+    {
+        if (string.IsNullOrWhiteSpace(stage.Effect))
+        {
+            return null;
+        }
+
+        if (catalog.HasText(locale, stage.Effect))
+        {
+            return catalog.Text(locale, stage.Effect);
+        }
+
+        return stage.Effect;
    }

    private static IReadOnlyList<LessonMarkEntryResponse> LessonMarks(
@@ -171,6 +171,28 @@
    "roles": ["staff", "parent"],
    "weight": 0,
  },
+  {
+    // Nurse visit presence / card labels (slice 14 phase 80). Weight 0 — never planner picks.
+    "defName": "GoingToNurse",
+    "room": "Corridor",
+    "minutes": 1,
+    "roles": ["student", "staff"],
+    "weight": 0,
+  },
+  {
+    "defName": "WaitForNurse",
+    "room": "Corridor",
+    "minutes": 1,
+    "roles": ["student", "staff"],
+    "weight": 0,
+  },
+  {
+    "defName": "NurseCare",
+    "room": "MedicalOffice",
+    "minutes": 8,
+    "roles": ["student", "staff"],
+    "weight": 0,
+  },
  {
    "defName": "ChangeClothesMale",
    "room": "MaleChangingRoom",
@@ -132,4 +132,6 @@
    "diseaseVectorScale": 1,
    // Contagion cases in one day at or above this raise diseaseOutbreak (slice 14 phase 79).
    "diseaseOutbreakMinNewCases": 3,
+    // Nurse tend scales with Medicine skill (slice 14 phase 80).
+    "nurseTendMedicineScale": 1,
 }
@@ -12,10 +12,13 @@
    "nodeContagionChancePerDay": 0.55,
    "classContagionChancePerDay": 0.25,
    "contagiousDuringIncubation": true,
+    "nurseSeekSeverity": 0.35,
+    "tendSeverityPerDay": -0.3,
+    "tendProgressPerDay": 0.4,
    "stages": [
-      { "minSeverity": 0, "severityPerDay": 0.25, "progressPerDay": 0.05, "lessonLearningFactor": 0.85, "stayHomeChance": 0.15, "warmthDecayFactor": 1.1 },
-      { "minSeverity": 0.4, "severityPerDay": 0.1, "progressPerDay": 0.12, "lessonLearningFactor": 0.65, "stayHomeChance": 0.45, "warmthDecayFactor": 1.2 },
-      { "minSeverity": 0.7, "severityPerDay": -0.05, "progressPerDay": 0.2, "lessonLearningFactor": 0.45, "stayHomeChance": 0.75, "warmthDecayFactor": 1.3 },
+      { "minSeverity": 0, "severityPerDay": 0.25, "progressPerDay": 0.05, "lessonLearningFactor": 0.85, "stayHomeChance": 0.15, "warmthDecayFactor": 1.1, "talkWeightFactor": 0.9, "effect": "ColdEffectMild" },
+      { "minSeverity": 0.4, "severityPerDay": 0.1, "progressPerDay": 0.12, "lessonLearningFactor": 0.65, "stayHomeChance": 0.45, "warmthDecayFactor": 1.2, "talkWeightFactor": 0.55, "effect": "ColdEffectModerate" },
+      { "minSeverity": 0.7, "severityPerDay": -0.05, "progressPerDay": 0.2, "lessonLearningFactor": 0.45, "stayHomeChance": 0.75, "warmthDecayFactor": 1.3, "talkWeightFactor": 0.3, "effect": "ColdEffectHeavy" },
    ],
  },
  {
@@ -31,10 +34,13 @@
    "nodeContagionChancePerDay": 0.65,
    "classContagionChancePerDay": 0.35,
    "contagiousDuringIncubation": true,
+    "nurseSeekSeverity": 0.3,
+    "tendSeverityPerDay": -0.4,
+    "tendProgressPerDay": 0.5,
    "stages": [
-      { "minSeverity": 0, "severityPerDay": 0.35, "progressPerDay": 0.03, "lessonLearningFactor": 0.7, "stayHomeChance": 0.35, "warmthDecayFactor": 1.2 },
-      { "minSeverity": 0.35, "severityPerDay": 0.15, "progressPerDay": 0.08, "lessonLearningFactor": 0.4, "stayHomeChance": 0.7, "warmthDecayFactor": 1.4 },
-      { "minSeverity": 0.65, "severityPerDay": -0.08, "progressPerDay": 0.18, "lessonLearningFactor": 0.25, "stayHomeChance": 0.95, "warmthDecayFactor": 1.5 },
+      { "minSeverity": 0, "severityPerDay": 0.35, "progressPerDay": 0.03, "lessonLearningFactor": 0.7, "stayHomeChance": 0.35, "warmthDecayFactor": 1.2, "talkWeightFactor": 0.7, "effect": "FluEffectMild" },
+      { "minSeverity": 0.35, "severityPerDay": 0.15, "progressPerDay": 0.08, "lessonLearningFactor": 0.4, "stayHomeChance": 0.7, "warmthDecayFactor": 1.4, "talkWeightFactor": 0.35, "effect": "FluEffectModerate" },
+      { "minSeverity": 0.65, "severityPerDay": -0.08, "progressPerDay": 0.18, "lessonLearningFactor": 0.25, "stayHomeChance": 0.95, "warmthDecayFactor": 1.5, "talkWeightFactor": 0.15, "effect": "FluEffectHeavy" },
    ],
  },
  {
@@ -47,9 +53,12 @@
    "nodeContagionChancePerDay": 0.3,
    "classContagionChancePerDay": 0,
    "contagiousDuringIncubation": false,
+    "nurseSeekSeverity": 0.4,
+    "tendSeverityPerDay": -0.35,
+    "tendProgressPerDay": 0.55,
    "stages": [
-      { "minSeverity": 0, "severityPerDay": 0.4, "progressPerDay": 0.08, "lessonLearningFactor": 0.6, "stayHomeChance": 0.5, "warmthDecayFactor": 1 },
-      { "minSeverity": 0.5, "severityPerDay": -0.1, "progressPerDay": 0.25, "lessonLearningFactor": 0.35, "stayHomeChance": 0.85, "warmthDecayFactor": 1 },
+      { "minSeverity": 0, "severityPerDay": 0.4, "progressPerDay": 0.08, "lessonLearningFactor": 0.6, "stayHomeChance": 0.5, "warmthDecayFactor": 1, "talkWeightFactor": 0.5, "effect": "StomachEffectMild" },
+      { "minSeverity": 0.5, "severityPerDay": -0.1, "progressPerDay": 0.25, "lessonLearningFactor": 0.35, "stayHomeChance": 0.85, "warmthDecayFactor": 1, "talkWeightFactor": 0.25, "effect": "StomachEffectHeavy" },
    ],
  },
  {
@@ -61,10 +70,13 @@
    "coldBelowC": 8,
    "coldChancePerDay": 0.05,
    "snowChancePerDay": 0.03,
+    "nurseSeekSeverity": 0.4,
+    "tendSeverityPerDay": -0.25,
+    "tendProgressPerDay": 0.35,
    "stages": [
-      { "minSeverity": 0, "severityPerDay": 0.2, "progressPerDay": 0.04, "lessonLearningFactor": 0.8, "stayHomeChance": 0.2, "warmthDecayFactor": 1.05 },
-      { "minSeverity": 0.45, "severityPerDay": 0.05, "progressPerDay": 0.1, "lessonLearningFactor": 0.55, "stayHomeChance": 0.55, "warmthDecayFactor": 1.1 },
-      { "minSeverity": 0.75, "severityPerDay": -0.06, "progressPerDay": 0.22, "lessonLearningFactor": 0.4, "stayHomeChance": 0.8, "warmthDecayFactor": 1.15 },
+      { "minSeverity": 0, "severityPerDay": 0.2, "progressPerDay": 0.04, "lessonLearningFactor": 0.8, "stayHomeChance": 0.2, "warmthDecayFactor": 1.05, "talkWeightFactor": 0.75, "effect": "OtitisEffectMild" },
+      { "minSeverity": 0.45, "severityPerDay": 0.05, "progressPerDay": 0.1, "lessonLearningFactor": 0.55, "stayHomeChance": 0.55, "warmthDecayFactor": 1.1, "talkWeightFactor": 0.45, "effect": "OtitisEffectModerate" },
+      { "minSeverity": 0.75, "severityPerDay": -0.06, "progressPerDay": 0.22, "lessonLearningFactor": 0.4, "stayHomeChance": 0.8, "warmthDecayFactor": 1.15, "talkWeightFactor": 0.25, "effect": "OtitisEffectHeavy" },
    ],
  },
 ]
@@ -245,9 +245,23 @@
  "GoingToPrincipal": "going to the principal",
  "WaitForPrincipal": "waiting at the principal's office",
  "GoingToParentMeeting": "going to a parent meeting",
+  "GoingToNurse": "going to the nurse",
+  "WaitForNurse": "waiting at the nurse's office",
+  "NurseCare": "seeing the nurse",
  "CommonCold": "Common cold",
  "Influenza": "Influenza",
  "StomachBug": "Stomach bug",
  "Otitis": "Ear infection",
+  "ColdEffectMild": "Mild sniffles, learns a bit worse",
+  "ColdEffectModerate": "Weakness, chats less",
+  "ColdEffectHeavy": "Strong discomfort, barely talks",
+  "FluEffectMild": "Aches, poorer attention",
+  "FluEffectModerate": "Fever, little energy for talk",
+  "FluEffectHeavy": "Severe weakness, barely learns",
+  "StomachEffectMild": "Nausea, avoids food and chatter",
+  "StomachEffectHeavy": "Strong discomfort, better to rest",
+  "OtitisEffectMild": "Earache, hears worse",
+  "OtitisEffectModerate": "Pain hurts lessons and talk",
+  "OtitisEffectHeavy": "Severe pain, barely talks",
  "core": "Core",
 }
@@ -245,9 +245,23 @@
  "GoingToPrincipal": "идёт к директору",
  "WaitForPrincipal": "ждёт у кабинета директора",
  "GoingToParentMeeting": "идёт на собрание",
+  "GoingToNurse": "идёт к медсестре",
+  "WaitForNurse": "ждёт у медкабинета",
+  "NurseCare": "на приёме у медсестры",
  "CommonCold": "ОРВИ",
  "Influenza": "Грипп",
  "StomachBug": "Кишечная инфекция",
  "Otitis": "Отит",
+  "ColdEffectMild": "Лёгкий насморк, учится чуть хуже",
+  "ColdEffectModerate": "Слабость, реже болтает",
+  "ColdEffectHeavy": "Сильный дискомфорт, почти не общается",
+  "FluEffectMild": "Ломота, сниженное внимание",
+  "FluEffectModerate": "Высокая температура, мало сил на разговоры",
+  "FluEffectHeavy": "Тяжёлая слабость, почти не учится",
+  "StomachEffectMild": "Тошнота, избегает еды и болтовни",
+  "StomachEffectHeavy": "Сильный дискомфорт, лучше лежать",
+  "OtitisEffectMild": "Боль в ухе, хуже слышит",
+  "OtitisEffectModerate": "Боль мешает уроку и разговору",
+  "OtitisEffectHeavy": "Сильная боль, почти не общается",
  "core": "Базовая игра",
 }
@@ -195,6 +195,10 @@ internal static class ActivitySystem
        actionId is not null
        && actionId.Equals(DirectorSummons.HearingAction, StringComparison.Ordinal);

+    internal static bool IsNurseCare(string? actionId) =>
+        actionId is not null
+        && actionId.Equals(NurseCare.CareAction, StringComparison.Ordinal);
+
    internal static bool IsParentMeeting(string? actionId) =>
        actionId is not null
        && actionId.Equals(ParentMeetings.MeetingAction, StringComparison.Ordinal);
@@ -0,0 +1,373 @@
+using Arch.Core;
+using HSchool.Ai;
+using HSchool.People;
+
+namespace HSchool.Simulation;
+
+/// <summary>
+/// Sick people seek the medical office; FIFO corridor wait; nurse tend while co-located.
+/// Only the school worker thread mutates <see cref="School.NurseVisits"/>.
+/// </summary>
+internal static class NurseCareSystem
+{
+    private static readonly QueryDescription PresenceQuery =
+        new QueryDescription().WithAll<PersonIdentity, Presence, PersonActivity, Intent>();
+
+    public static bool IsVisiting(School school, string personId) =>
+        school.NurseVisits.Any(row => row.PersonId.Equals(personId, StringComparison.Ordinal));
+
+    public static bool TryDutyRoom(School school, string personId, out string roomId)
+    {
+        roomId = null!;
+        var ticket = school.NurseVisits.FirstOrDefault(row =>
+            row.PersonId.Equals(personId, StringComparison.Ordinal));
+        if (ticket is null || school.Map is null)
+        {
+            return false;
+        }
+
+        var office = NurseCare.OfficeNodeId(school.Map);
+        var wait = NurseCare.WaitNodeId(school.Map, office);
+        if (office is null || wait is null)
+        {
+            return false;
+        }
+
+        roomId = ticket.Admitted ? office : wait;
+        return true;
+    }
+
+    public static byte ResolvePresencePhase(School school, string personId)
+    {
+        var ticket = school.NurseVisits.FirstOrDefault(row =>
+            row.PersonId.Equals(personId, StringComparison.Ordinal));
+        if (ticket is null)
+        {
+            return NurseCare.PresenceNone;
+        }
+
+        var walking = false;
+        var caring = false;
+        string? nodeId = null;
+        school.World.Query(
+            in PresenceQuery,
+            (ref PersonIdentity identity, ref Presence presence, ref PersonActivity activity, ref Intent _) =>
+            {
+                if (!identity.Id.Equals(personId, StringComparison.Ordinal))
+                {
+                    return;
+                }
+
+                nodeId = presence.NodeId;
+                walking = presence.Path.Length > 0 || presence.RemainingMinutes > 0
+                    || (presence.DestinationId is not null
+                        && !presence.DestinationId.Equals(presence.NodeId, StringComparison.Ordinal));
+                caring = activity.IsActive && ActivitySystem.IsNurseCare(activity.ActionId);
+            });
+
+        if (caring)
+        {
+            return NurseCare.PresenceCare;
+        }
+
+        if (walking)
+        {
+            return NurseCare.PresenceGoing;
+        }
+
+        var office = NurseCare.OfficeNodeId(school.Map!);
+        if (ticket.Admitted
+            && office is not null
+            && nodeId is not null
+            && nodeId.Equals(office, StringComparison.Ordinal))
+        {
+            return NurseCare.PresenceCare;
+        }
+
+        return NurseCare.PresenceWaiting;
+    }
+
+    public static string? PresenceActionId(byte phase) => phase switch
+    {
+        NurseCare.PresenceGoing => NurseCare.GoingAction,
+        NurseCare.PresenceWaiting => NurseCare.WaitingAction,
+        NurseCare.PresenceCare => NurseCare.CareAction,
+        _ => null,
+    };
+
+    public static void ClearAll(School school)
+    {
+        if (school.NurseVisits.Count == 0)
+        {
+            return;
+        }
+
+        var ids = school.NurseVisits.Select(row => row.PersonId).ToArray();
+        school.NurseVisits.Clear();
+        foreach (var id in ids)
+        {
+            PresenceSystem.Enqueue(school, id);
+        }
+    }
+
+    public static void Apply(School school, double gameMinutes)
+    {
+        if (school.Roster is null || school.Map is null || school.Catalog is null)
+        {
+            return;
+        }
+
+        if (!NurseCare.CanStart(school.Roster, school.Map))
+        {
+            ClearAll(school);
+            return;
+        }
+
+        EnqueueNeedingCare(school);
+        DropRecovered(school);
+        AdmitHead(school);
+        ApplyTend(school, gameMinutes);
+        TryStartCareActivity(school);
+    }
+
+    private static void EnqueueNeedingCare(School school)
+    {
+        var catalog = school.Catalog!;
+        var now = school.Clock.Time;
+        foreach (var person in school.Roster!.People.OrderBy(row => row.Id, StringComparer.Ordinal))
+        {
+            if (IsVisiting(school, person.Id))
+            {
+                continue;
+            }
+
+            if (DiseaseEffects.ConditionNeedingNurse(person, catalog, now) is null)
+            {
+                continue;
+            }
+
+            // Pupils and staff on campus can seek care; parents off-roster roles skip.
+            if (!person.IsStudent && !person.IsStaff)
+            {
+                continue;
+            }
+
+            school.NurseVisits.Add(new NurseVisitTicket(person.Id, school.NextNurseVisitOrder++, admitted: false));
+            PresenceSystem.Enqueue(school, person.Id);
+        }
+    }
+
+    private static void DropRecovered(School school)
+    {
+        var catalog = school.Catalog!;
+        var now = school.Clock.Time;
+        for (var i = school.NurseVisits.Count - 1; i >= 0; i--)
+        {
+            var ticket = school.NurseVisits[i];
+            var person = school.Roster!.People.FirstOrDefault(row =>
+                row.Id.Equals(ticket.PersonId, StringComparison.Ordinal));
+            if (person is not null
+                && DiseaseEffects.ConditionNeedingNurse(person, catalog, now) is not null)
+            {
+                continue;
+            }
+
+            school.NurseVisits.RemoveAt(i);
+            PresenceSystem.Enqueue(school, ticket.PersonId);
+        }
+    }
+
+    private static void AdmitHead(School school)
+    {
+        if (school.NurseVisits.Any(row => row.Admitted))
+        {
+            return;
+        }
+
+        var head = school.NurseVisits.OrderBy(row => row.Order).FirstOrDefault();
+        if (head is null)
+        {
+            return;
+        }
+
+        head.Admitted = true;
+        PresenceSystem.Enqueue(school, head.PersonId);
+    }
+
+    private static void ApplyTend(School school, double gameMinutes)
+    {
+        if (gameMinutes <= 0)
+        {
+            return;
+        }
+
+        var nurseId = NurseCare.NurseId(school.Roster!);
+        if (nurseId is null)
+        {
+            return;
+        }
+
+        var office = NurseCare.OfficeNodeId(school.Map!);
+        if (office is null || !IsIdleOrCaringIn(school, nurseId, office))
+        {
+            return;
+        }
+
+        var nurse = school.Roster!.People.First(row => row.Id.Equals(nurseId, StringComparison.Ordinal));
+        var medicine = LiveMedicine(school, nurseId) ?? NurseCare.MedicineOf(nurse);
+        var scale = school.Catalog!.BehaviorRules?.NurseTendMedicineScale ?? 1f;
+        var dayNumber = DateOnly.FromDateTime(school.Clock.Time).DayNumber;
+        var changed = false;
+
+        foreach (var ticket in school.NurseVisits.Where(row => row.Admitted).ToArray())
+        {
+            if (!IsInNode(school, ticket.PersonId, office))
+            {
+                continue;
+            }
+
+            var patient = school.Roster.People.FirstOrDefault(row =>
+                row.Id.Equals(ticket.PersonId, StringComparison.Ordinal));
+            if (patient is null)
+            {
+                continue;
+            }
+
+            if (DiseaseEffects.Tend(
+                    patient,
+                    school.PeopleSeed,
+                    dayNumber,
+                    gameMinutes,
+                    school.Catalog,
+                    medicine,
+                    school.Clock.Time,
+                    scale))
+            {
+                changed = true;
+            }
+        }
+
+        if (changed)
+        {
+            school.RosterTalkDirty = true;
+        }
+    }
+
+    private static void TryStartCareActivity(School school)
+    {
+        var admitted = school.NurseVisits.FirstOrDefault(row => row.Admitted);
+        if (admitted is null || school.Catalog is null)
+        {
+            return;
+        }
+
+        var office = NurseCare.OfficeNodeId(school.Map!);
+        if (office is null
+            || !IsInNode(school, admitted.PersonId, office)
+            || !school.Catalog.Actions.TryGetValue(NurseCare.CareAction, out var action)
+            || action.Abstract)
+        {
+            return;
+        }
+
+        var minutes = action.Minutes > 0f ? action.Minutes : 5f;
+        school.World.Query(
+            in PresenceQuery,
+            (ref PersonIdentity identity, ref Presence presence, ref PersonActivity activity, ref Intent intent) =>
+            {
+                if (!identity.Id.Equals(admitted.PersonId, StringComparison.Ordinal))
+                {
+                    return;
+                }
+
+                if (activity.IsActive || presence.Path.Length > 0 || presence.RemainingMinutes > 0)
+                {
+                    return;
+                }
+
+                if (presence.NodeId is null
+                    || !presence.NodeId.Equals(office, StringComparison.Ordinal))
+                {
+                    return;
+                }
+
+                activity = new PersonActivity(NurseCare.CareAction, null, minutes);
+                intent = Intent.None;
+            });
+    }
+
+    private static bool IsInNode(School school, string personId, string nodeId)
+    {
+        var found = false;
+        school.World.Query(
+            in PresenceQuery,
+            (ref PersonIdentity identity, ref Presence presence, ref PersonActivity _, ref Intent _) =>
+            {
+                if (identity.Id.Equals(personId, StringComparison.Ordinal)
+                    && presence.NodeId is not null
+                    && presence.NodeId.Equals(nodeId, StringComparison.Ordinal)
+                    && presence.Path.Length == 0
+                    && presence.RemainingMinutes <= 0)
+                {
+                    found = true;
+                }
+            });
+        return found;
+    }
+
+    private static bool IsIdleOrCaringIn(School school, string personId, string nodeId)
+    {
+        var found = false;
+        school.World.Query(
+            in PresenceQuery,
+            (ref PersonIdentity identity, ref Presence presence, ref PersonActivity activity, ref Intent _) =>
+            {
+                if (!identity.Id.Equals(personId, StringComparison.Ordinal))
+                {
+                    return;
+                }
+
+                if (presence.NodeId is null
+                    || !presence.NodeId.Equals(nodeId, StringComparison.Ordinal)
+                    || presence.Path.Length > 0
+                    || presence.RemainingMinutes > 0)
+                {
+                    return;
+                }
+
+                // Nurse on MedicalDuty stands in the office; any active non-care action blocks tend.
+                if (activity.IsActive && !ActivitySystem.IsNurseCare(activity.ActionId))
+                {
+                    return;
+                }
+
+                found = true;
+            });
+        return found;
+    }
+
+    private static float? LiveMedicine(School school, string personId)
+    {
+        float? found = null;
+        var query = new QueryDescription().WithAll<PersonIdentity, PersonSkills>();
+        school.World.Query(in query, (ref PersonIdentity identity, ref PersonSkills skills) =>
+        {
+            if (identity.Id.Equals(personId, StringComparison.Ordinal)
+                && skills.Values.TryGetValue(NurseCare.MedicineSkill, out var level))
+            {
+                found = level;
+            }
+        });
+        return found;
+    }
+}
+
+/// <summary>One nurse-visit ticket. <see cref="Order"/> is FIFO; lower goes first.</summary>
+internal sealed class NurseVisitTicket(string personId, int order, bool admitted)
+{
+    public string PersonId { get; } = personId;
+
+    public int Order { get; } = order;
+
+    public bool Admitted { get; set; } = admitted;
+}
@@ -332,7 +332,8 @@ internal static class PresenceSystem
            ? slot.Kind != DaySlotKind.Outside
            : slot.Kind == DaySlotKind.Lesson && lessons.Any(lesson => lesson.Period == slot.Index);
        if (DirectorSummonSystem.IsSummoned(school, person.Id)
-            || ParentMeetingSystem.IsInMeeting(school, person.Id))
+            || ParentMeetingSystem.IsInMeeting(school, person.Id)
+            || NurseCareSystem.IsVisiting(school, person.Id))
        {
            bound = true;
        }
@@ -353,6 +354,11 @@ internal static class PresenceSystem
            return null;
        }

+        if (activity.IsActive && ActivitySystem.IsNurseCare(activity.ActionId))
+        {
+            return null;
+        }
+
        if (activity.IsActive && ActivitySystem.IsParentMeeting(activity.ActionId))
        {
            return null;
@@ -371,6 +377,16 @@ internal static class PresenceSystem
                return null;
            }

+            if (NurseCareSystem.TryDutyRoom(school, person.Id, out var nurseArrive))
+            {
+                presence = PresenceStepper.StartWalk(
+                    Presence.OffCampus,
+                    walks,
+                    nurseArrive,
+                    headingHome: false);
+                return null;
+            }
+
            if (plan.AppearAt is { } appear && now >= appear && (plan.WalkHomeAt is null || now < plan.WalkHomeAt))
            {
                var dest = plan.FirstRoom ?? Duty.RoomAt(
@@ -384,6 +400,10 @@ internal static class PresenceSystem
                {
                    dest = summonArrive;
                }
+                else if (NurseCareSystem.TryDutyRoom(school, person.Id, out var nurseDest))
+                {
+                    dest = nurseDest;
+                }

                presence = dest is null
                    ? Presence.OffCampus
@@ -398,7 +418,8 @@ internal static class PresenceSystem
        if (plan.WalkHomeAt is { } leave
            && now >= leave
            && !DirectorSummonSystem.IsSummoned(school, person.Id)
-            && !ParentMeetingSystem.IsInMeeting(school, person.Id))
+            && !ParentMeetingSystem.IsInMeeting(school, person.Id)
+            && !NurseCareSystem.IsVisiting(school, person.Id))
        {
            activity = PersonActivity.Idle;
            intent = Intent.None;
@@ -423,6 +444,11 @@ internal static class PresenceSystem
            duty = meetingRoom;
            bound = true;
        }
+        else if (NurseCareSystem.TryDutyRoom(school, person.Id, out var nurseRoom))
+        {
+            duty = nurseRoom;
+            bound = true;
+        }

        if (duty is null)
        {
@@ -437,6 +463,9 @@ internal static class PresenceSystem
            && SchoolDay.IsLunchWindow(frame, slot, ClassOf(school, person)?.Year);
        var apparel = ApparelPresence.Build(school, person, ClassOf(school, person));
        var talk = BuildTalkContext(school, person, bound, lunchOpen, slot);
+        var socialWeight = school.Catalog is null
+            ? 1f
+            : DiseaseEffects.TalkWeightFactor(person, school.Catalog, now);
        var state = new ActorState(
            presence.NodeId,
            presence.DestinationId,
@@ -451,7 +480,8 @@ internal static class PresenceSystem
            intent,
            lunchOpen,
            apparel,
-            talk);
+            talk,
+            socialWeight);
        var decision = DecisionPlanner.Decide(
            school.Catalog!,
            school.Map!,
@@ -462,19 +492,21 @@ internal static class PresenceSystem
        var changing = activity.IsActive && ActivitySystem.IsChangeClothes(activity.ActionId);
        var inTalk = activity.IsActive && TalkActions.IsTalk(activity.ActionId);
        var inHearing = activity.IsActive && ActivitySystem.IsPrincipalHearing(activity.ActionId);
+        var inNurseCare = activity.IsActive && ActivitySystem.IsNurseCare(activity.ActionId);

        if (decision.WalkTo is not null
            && !decision.WalkTo.Equals(presence.NodeId, StringComparison.Ordinal)
            && activity.IsActive
            && !changing
            && !inTalk
-            && !inHearing)
+            && !inHearing
+            && !inNurseCare)
        {
            activity = PersonActivity.Idle;
        }

        intent = decision.Intent;
-        if (decision.WalkTo is not null && !changing && !inTalk && !inHearing)
+        if (decision.WalkTo is not null && !changing && !inTalk && !inHearing && !inNurseCare)
        {
            presence = PresenceStepper.StartWalk(presence, walks, decision.WalkTo, headingHome: false);
        }
@@ -158,6 +158,13 @@ public sealed class School : IDisposable

    internal int NextSummonOrder { get; set; }

+    /// <summary>
+    /// Nurse visit FIFO. Worker thread only — never HTTP. Cleared on morning / skip.
+    /// </summary>
+    internal List<NurseVisitTicket> NurseVisits { get; } = [];
+
+    internal int NextNurseVisitOrder { get; set; }
+
    /// <summary>
    /// Active parent meetings. Worker thread only — never HTTP. Cleared on morning / skip.
    /// </summary>
@@ -348,6 +355,7 @@ public sealed class School : IDisposable
        Clock.JumpTo(next.Value);
        TalkCircleSystem.AbandonAll(this);
        DirectorSummonSystem.ClearAll(this);
+        NurseCareSystem.ClearAll(this);
        ParentMeetingSystem.ClearAll(this);
        ResetDayLog();
        var peopleChanged = TryYearlyIntake(before, next.Value);
@@ -423,7 +431,8 @@ public sealed class School : IDisposable
                ResetDayLog();
                // Hung summons do not survive the work morning — same clear as skip empty.
                DirectorSummonSystem.ClearAll(this);
-        ParentMeetingSystem.ClearAll(this);
+                NurseCareSystem.ClearAll(this);
+                ParentMeetingSystem.ClearAll(this);
            }

            peopleChanged = TryYearlyIntake(before, Clock.Time);
@@ -481,6 +490,12 @@ public sealed class School : IDisposable
    public string? DirectorSummonPresenceActionId(string personId) =>
        DirectorSummonSystem.PresenceActionId(DirectorSummonPresencePhase(personId));

+    public byte NurseCarePresencePhase(string personId) =>
+        NurseCareSystem.ResolvePresencePhase(this, personId);
+
+    public string? NurseCarePresenceActionId(string personId) =>
+        NurseCareSystem.PresenceActionId(NurseCarePresencePhase(personId));
+
    /// <summary>
    /// Card label while walking to / sitting in a parent meeting without a live activity yet.
    /// </summary>
@@ -528,6 +543,7 @@ public sealed class School : IDisposable
        }

        DirectorSummonSystem.Apply(this);
+        NurseCareSystem.Apply(this, gameMinutes);
        ParentMeetingSystem.Apply(this);

        PersonDayLog.Sync(this);
@@ -57,6 +57,7 @@ internal static class TalkCircleSystem

        school.ApologyDebts.Clear();
        DirectorSummonSystem.ClearAll(school);
+        NurseCareSystem.ClearAll(school);
        ParentMeetingSystem.ClearAll(school);
        school.World.Query(in People, (ref PersonActivity activity) =>
        {