Implement custom portrait generation: update API, UI, and localization to support user-defined prompts for portraits, replacing half-body option with custom variant.

docs/protocol.md

@@ -264,8 +264,9 @@ overload does not slow walking. `hasLocker` is true when the pupil has an assign
 is how many items remain at home, not the list. The people list does not include any of these
 fields. Today's history is a separate GET.
 
-`hasAvatar`, `hasHalfBody` and `hasFullBody` tell the client whether PNG files already exist on disk for this
+`hasAvatar`, `hasCustom` and `hasFullBody` tell the client whether PNG files already exist on disk for this
-person. They are filled on the HTTP thread after the worker returns the card; generation does
+person. `customPortraitPrompt` is the last saved user prompt for the custom variant (null when none).
+They are filled on the HTTP thread after the worker returns the card; generation does
 not happen on this request.
 
 ```json
@@ -318,8 +319,9 @@ not happen on this request.
   "hasLocker": false,
   "homeCount": 3,
   "hasAvatar": false,
-  "hasHalfBody": false,
+  "hasCustom": false,
-  "hasFullBody": false
+  "hasFullBody": false,
+  "customPortraitPrompt": null
 }
 ```
 
@@ -358,15 +360,18 @@ the action or apparel def the caption was built from.
 
 ### `GET /api/schools/{id}/people/{personId}/portrait`
 
-Returns a generated PNG when one exists. Query `kind=avatar|half|full` selects head-and-shoulders,
+Returns a generated PNG when one exists. Query `kind=avatar|custom|full` selects head-and-shoulders,
-waist-up or full-body. Unknown school is `404` `unknown-school`; unknown person is `404` `unknown-person`;
+a custom prompt variant or full-body. Unknown school is `404` `unknown-school`; unknown person is `404` `unknown-person`;
 missing file is `404` `portrait-missing`. Invalid `kind` is `400` `invalid-query`. Content-Type
 is `image/png`. Opening the card does not generate; use POST when the player asks.
 
 ### `POST /api/schools/{id}/people/{personId}/portrait`
 
 Generates (or regenerates) a portrait through SwarmUI on the server. Same `kind` query as GET.
-Success is `201` with `{ "kind", "hasAvatar", "hasHalfBody", "hasFullBody" }` and a `Location` header pointing
+For `kind=custom` the body is `{ "promptExtra": "..." }` — appended to the base SwarmUI prompt and
+the person's body/clothing; required, non-empty, at most 2000 characters. Avatar and full-body POST
+need no body.
+Success is `201` with `{ "kind", "hasAvatar", "hasCustom", "hasFullBody", "customPortraitPrompt" }` and a `Location` header pointing
 at GET. SwarmUI is not configured when `SwarmUi:BaseUrl` is empty — `503` `swarmui-not-configured`.
 Swarm errors are `502` `swarmui-unavailable`; a slow backend is `504` `swarmui-timeout`. Files
 land under `saves/{id}.portraits/` and survive until the school is deleted.

src/HSchool.Client/src/i18n/strings.ts

@@ -155,11 +155,14 @@ const ru = {
   peopleTabOverview: 'Обзор',
   peopleTabPortrait: 'Портрет',
   peoplePortraitAvatar: 'Аватар',
-  peoplePortraitHalf: 'По пояс',
   peoplePortraitFull: 'В полный рост',
+  peoplePortraitCustom: 'Свой промпт',
+  peoplePortraitCustomHint: 'Дополнение к базовому промпту',
+  peoplePortraitCustomPlaceholder: 'Например: standing in a school hallway, soft window light',
   peoplePortraitGenerateAvatar: 'Сгенерировать аватар',
-  peoplePortraitGenerateHalf: 'Сгенерировать по пояс',
   peoplePortraitGenerateFull: 'Сгенерировать в полный рост',
+  peoplePortraitGenerateCustom: 'Сгенерировать',
+  peoplePortraitRegenerateCustom: 'Перегенерировать',
   peoplePortraitGenerating: 'Генерация…',
   peoplePortraitMissing: 'Ещё не сгенерировано.',
   peoplePortraitUnavailable: 'SwarmUI не настроен на сервере.',
@@ -412,11 +415,14 @@ const en: Messages = {
   peopleTabOverview: 'Overview',
   peopleTabPortrait: 'Portrait',
   peoplePortraitAvatar: 'Avatar',
-  peoplePortraitHalf: 'Waist up',
   peoplePortraitFull: 'Full body',
+  peoplePortraitCustom: 'Custom prompt',
+  peoplePortraitCustomHint: 'Added to the base prompt',
+  peoplePortraitCustomPlaceholder: 'For example: standing in a school hallway, soft window light',
   peoplePortraitGenerateAvatar: 'Generate avatar',
-  peoplePortraitGenerateHalf: 'Generate waist up',
   peoplePortraitGenerateFull: 'Generate full body',
+  peoplePortraitGenerateCustom: 'Generate',
+  peoplePortraitRegenerateCustom: 'Regenerate',
   peoplePortraitGenerating: 'Generating…',
   peoplePortraitMissing: 'Not generated yet.',
   peoplePortraitUnavailable: 'SwarmUI is not configured on the server.',

src/HSchool.Client/src/net/api.ts

@@ -298,8 +298,9 @@ export interface PersonCard {
   readonly hasLocker: boolean;
   readonly homeCount: number;
   readonly hasAvatar: boolean;
-  readonly hasHalfBody: boolean;
+  readonly hasCustom: boolean;
   readonly hasFullBody: boolean;
+  readonly customPortraitPrompt: string | null;
 }
 
 export interface WornItem {
@@ -401,17 +402,26 @@ export async function fetchGameStatus(): Promise<GameStatus> {
   return request<GameStatus>('/api/status');
 }
 
-export type PortraitKind = 'avatar' | 'half' | 'full';
+export type PortraitKind = 'avatar' | 'full' | 'custom';
 
 export interface PortraitResult {
   readonly kind: PortraitKind;
   readonly hasAvatar: boolean;
-  readonly hasHalfBody: boolean;
+  readonly hasCustom: boolean;
   readonly hasFullBody: boolean;
+  readonly customPortraitPrompt: string | null;
 }
 
-export function portraitUrl(schoolId: number, personId: string, kind: PortraitKind): string {
+export function portraitUrl(
+  schoolId: number,
+  personId: string,
+  kind: PortraitKind,
+  cacheBust?: number,
+): string {
   const params = new URLSearchParams({ kind });
+  if (cacheBust !== undefined) {
+    params.set('v', String(cacheBust));
+  }
   return `/api/schools/${schoolId}/people/${encodeURIComponent(personId)}/portrait?${params.toString()}`;
 }
 
@@ -419,11 +429,18 @@ export async function generatePortrait(
   schoolId: number,
   personId: string,
   kind: PortraitKind,
+  promptExtra?: string,
 ): Promise<PortraitResult> {
   const params = new URLSearchParams({ kind });
+  const init: RequestInit = { method: 'POST' };
+  if (kind === 'custom') {
+    init.headers = { 'Content-Type': 'application/json' };
+    init.body = JSON.stringify({ promptExtra: promptExtra ?? '' });
+  }
+
   return request<PortraitResult>(
     `/api/schools/${schoolId}/people/${encodeURIComponent(personId)}/portrait?${params.toString()}`,
-    { method: 'POST' },
+    init,
   );
 }
 

src/HSchool.Client/src/style.css

@@ -635,7 +635,7 @@ body {
 }
 
 .people__portrait--full,
-.people__portrait--half {
+.people__portrait--custom {
   width: min(100%, 384px);
   height: auto;
 }
@@ -644,6 +644,13 @@ body {
   margin-bottom: 16px;
 }
 
+.people__portrait-prompt-input {
+  width: 100%;
+  min-height: 72px;
+  resize: vertical;
+  margin-bottom: 8px;
+}
+
 .people__swarm-status {
   margin: 0 0 12px;
   font-size: 13px;

src/HSchool.Client/src/ui/dom.ts

@@ -11,8 +11,12 @@ interface ElementOptions {
   hidden?: boolean;
   src?: string;
   alt?: string;
+  placeholder?: string;
+  value?: string;
+  rows?: number;
   dataset?: Record<string, string>;
   onClick?: (event: Event) => void;
+  onInput?: (event: Event) => void;
 }
 
 export function el<K extends keyof HTMLElementTagNameMap>(
@@ -36,6 +40,20 @@ export function el<K extends keyof HTMLElementTagNameMap>(
     (element as HTMLImageElement).alt = options.alt;
   }
 
+  if (options.placeholder !== undefined && 'placeholder' in element) {
+    (element as HTMLInputElement | HTMLTextAreaElement).placeholder = options.placeholder;
+  }
+
+  if (options.value !== undefined && 'value' in element) {
+    (element as HTMLInputElement | HTMLTextAreaElement).value = options.value;
+  }
+
+  if (options.rows !== undefined && element instanceof HTMLTextAreaElement) {
+    element.rows = options.rows;
+  }
+
+  if (options.onInput !== undefined) element.addEventListener('input', options.onInput);
+
   if (options.onClick !== undefined) element.addEventListener('click', options.onClick);
 
   for (const [key, value] of Object.entries(options.dataset ?? {})) {

src/HSchool.Client/src/ui/managementPanel.test.ts

@@ -73,8 +73,9 @@ function personCard(): PersonCard {
     hasLocker: false,
     homeCount: 0,
     hasAvatar: false,
-    hasHalfBody: false,
+    hasCustom: false,
     hasFullBody: false,
+    customPortraitPrompt: null,
   };
 }
 

src/HSchool.Client/src/ui/personCard.test.ts

@@ -61,8 +61,9 @@ function card(overrides: Partial<PersonCard> = {}): PersonCard {
     hasLocker: false,
     homeCount: 2,
     hasAvatar: false,
-    hasHalfBody: false,
+    hasCustom: false,
     hasFullBody: false,
+    customPortraitPrompt: null,
     ...overrides,
   };
 }
@@ -172,8 +173,9 @@ describe('renderPersonCard', () => {
     const panel = root.querySelector('.people__portrait-panel');
     expect(panel).not.toBeNull();
     expect(panel?.textContent).toContain(t('peoplePortraitGenerateAvatar'));
-    expect(panel?.textContent).toContain(t('peoplePortraitGenerateHalf'));
     expect(panel?.textContent).toContain(t('peoplePortraitGenerateFull'));
+    expect(panel?.textContent).toContain(t('peoplePortraitCustomHint'));
+    expect(panel?.querySelector('.people__portrait-prompt-input')).not.toBeNull();
     expect(panel?.hasAttribute('hidden')).toBe(false);
     expect(root.querySelector('[data-card-tab="apparel"]')?.hasAttribute('hidden')).toBe(true);
   });

src/HSchool.Client/src/ui/personCard.ts

@@ -31,9 +31,12 @@ export interface RenderPersonCardOptions {
   readonly onLogDir?: (dir: PersonLogDir) => void;
   readonly onLogPage?: (page: number) => void;
   readonly schoolId?: number | null;
-  readonly onGeneratePortrait?: (kind: PortraitKind) => void;
+  readonly onGeneratePortrait?: (kind: PortraitKind, promptExtra?: string) => void;
   readonly portraitBusy?: PortraitKind | null;
   readonly portraitError?: string | null;
+  readonly customPrompt?: string;
+  readonly onCustomPromptChange?: (value: string) => void;
+  readonly customPortraitRevision?: number;
   readonly swarmConfigured?: boolean;
   /** null while checking or when SwarmUI is not configured. */
   readonly swarmConnected?: boolean | null;
@@ -357,6 +360,48 @@ function fillPortrait(parent: HTMLElement, card: PersonCard, options: RenderPers
     );
   }
 
+  parent.append(el('h4', { class: 'people__section-title', text: t('peoplePortraitCustom') }));
+  parent.append(
+    el(
+      'label',
+      { class: 'people__field' },
+      el('span', { class: 'people__label', text: t('peoplePortraitCustomHint') }),
+      el('textarea', {
+        class: 'input people__portrait-prompt-input',
+        rows: 3,
+        placeholder: t('peoplePortraitCustomPlaceholder'),
+        value: options.customPrompt ?? card.customPortraitPrompt ?? '',
+        disabled: (options.portraitBusy ?? null) !== null,
+        onInput: (event) => {
+          const target = event.target;
+          if (target instanceof HTMLTextAreaElement) {
+            options.onCustomPromptChange?.(target.value);
+          }
+        },
+      }),
+    ),
+  );
+
+  parent.append(portraitCustomPreview(card, options));
+  const customPrompt = (options.customPrompt ?? card.customPortraitPrompt ?? '').trim();
+  parent.append(
+    el('button', {
+      class: 'button button--small',
+      type: 'button',
+      text:
+        options.portraitBusy === 'custom'
+          ? t('peoplePortraitGenerating')
+          : card.hasCustom
+            ? t('peoplePortraitRegenerateCustom')
+            : t('peoplePortraitGenerateCustom'),
+      disabled:
+        (options.portraitBusy ?? null) !== null ||
+        !portraitGenerateEnabled(options) ||
+        customPrompt.length === 0,
+      onClick: () => options.onGeneratePortrait?.('custom', customPrompt),
+    }),
+  );
+
   if (options.swarmConfigured === false) {
     parent.append(el('p', { class: 'panel__empty', text: t('peoplePortraitUnavailable') }));
   } else if (options.swarmConfigured === true && options.swarmConnected === false) {
@@ -370,7 +415,7 @@ function fillPortrait(parent: HTMLElement, card: PersonCard, options: RenderPers
 }
 
 const PORTRAIT_VARIANTS: readonly {
-  readonly kind: PortraitKind;
+  readonly kind: Extract<PortraitKind, 'avatar' | 'full'>;
   readonly titleKey: MessageKey;
   readonly generateKey: MessageKey;
   readonly cssClass: string;
@@ -383,13 +428,6 @@ const PORTRAIT_VARIANTS: readonly {
     cssClass: 'people__portrait--avatar',
     hasImage: (card) => card.hasAvatar,
   },
-  {
-    kind: 'half',
-    titleKey: 'peoplePortraitHalf',
-    generateKey: 'peoplePortraitGenerateHalf',
-    cssClass: 'people__portrait--half',
-    hasImage: (card) => card.hasHalfBody,
-  },
   {
     kind: 'full',
     titleKey: 'peoplePortraitFull',
@@ -439,6 +477,18 @@ function portraitPreview(
   return el('p', { class: 'panel__empty', text: t('peoplePortraitMissing') });
 }
 
+function portraitCustomPreview(card: PersonCard, options: RenderPersonCardOptions): HTMLElement {
+  if (card.hasCustom && options.schoolId !== null && options.schoolId !== undefined) {
+    return el('img', {
+      class: 'people__portrait people__portrait--custom',
+      alt: card.fullName,
+      src: portraitUrl(options.schoolId, card.id, 'custom', options.customPortraitRevision),
+    });
+  }
+
+  return el('p', { class: 'panel__empty', text: t('peoplePortraitMissing') });
+}
+
 function cardMeta(card: PersonCard): string {
   const bits = [
     roleLabels(card.roles),

src/HSchool.Client/src/ui/personCardHost.ts

@@ -25,6 +25,9 @@ export class PersonCardHost {
   private tab: PersonCardTab = 'overview';
   private portraitBusy: PortraitKind | null = null;
   private portraitError: string | null = null;
+  private customPromptDraft = '';
+  private customPortraitRevision = 0;
+  private paintedId: string | null = null;
   private swarmConfigured = false;
   private swarmConnected: boolean | null = null;
   private schoolId: number | null = null;
@@ -63,6 +66,9 @@ export class PersonCardHost {
     this.resetTabs();
     this.portraitBusy = null;
     this.portraitError = null;
+    this.customPromptDraft = '';
+    this.customPortraitRevision = 0;
+    this.paintedId = null;
     this.swarmConnected = null;
   }
 
@@ -87,9 +93,16 @@ export class PersonCardHost {
     this.painted = card;
 
     if (card === null) {
+      this.paintedId = null;
       return;
     }
 
+    if (card.id !== this.paintedId) {
+      this.paintedId = card.id;
+      this.customPromptDraft = card.customPortraitPrompt ?? '';
+      this.customPortraitRevision = 0;
+    }
+
     this.repaint(container, card);
   }
 
@@ -131,9 +144,15 @@ export class PersonCardHost {
         void this.loadLog();
       },
       schoolId: this.schoolId,
-      onGeneratePortrait: (kind) => void this.generate(kind),
+      onGeneratePortrait: (kind, promptExtra) => void this.generate(kind, promptExtra),
       portraitBusy: this.portraitBusy,
       portraitError: this.portraitError,
+      customPrompt: this.customPromptDraft,
+      onCustomPromptChange: (value) => {
+        this.customPromptDraft = value;
+        this.refreshPainted();
+      },
+      customPortraitRevision: this.customPortraitRevision,
       swarmConfigured: this.swarmConfigured,
       swarmConnected: this.swarmConnected,
     });
@@ -169,7 +188,7 @@ export class PersonCardHost {
     }
   }
 
-  private async generate(kind: PortraitKind): Promise<void> {
+  private async generate(kind: PortraitKind, promptExtra?: string): Promise<void> {
     const schoolId = this.schoolId;
     const personId = this.painted?.id;
     if (schoolId === null || personId === undefined || this.portraitBusy !== null) {
@@ -181,13 +200,19 @@ export class PersonCardHost {
     this.refreshPainted();
 
     try {
-      const result = await generatePortrait(schoolId, personId, kind);
+      const result = await generatePortrait(schoolId, personId, kind, promptExtra);
       const card = await fetchPerson(schoolId, personId, getLocale());
+      if (kind === 'custom') {
+        this.customPortraitRevision = Date.now();
+        this.customPromptDraft = result.customPortraitPrompt ?? promptExtra ?? '';
+      }
+
       this.painted = {
         ...card,
         hasAvatar: result.hasAvatar,
-        hasHalfBody: result.hasHalfBody,
+        hasCustom: result.hasCustom,
         hasFullBody: result.hasFullBody,
+        customPortraitPrompt: result.customPortraitPrompt,
       };
     } catch (error) {
       this.portraitError =

src/HSchool.Server/Api/PeopleModels.cs

@@ -79,8 +79,9 @@ internal sealed record PersonCardResponse(
     bool HasLocker = false,
     int HomeCount = 0,
     bool HasAvatar = false,
-    bool HasHalfBody = false,
+    bool HasCustom = false,
-    bool HasFullBody = false);
+    bool HasFullBody = false,
+    string? CustomPortraitPrompt = null);
 
 internal sealed record WornItemResponse(
     string DefName,

src/HSchool.Server/Api/SchoolEndpoints.cs

@@ -246,7 +246,7 @@ internal static class SchoolEndpoints
 
             if (!PortraitKindParser.TryParse(kind, out var portraitKind))
             {
-                return Problem(StatusCodes.Status400BadRequest, "invalid-query", "kind must be avatar, half, or full.");
+                return Problem(StatusCodes.Status400BadRequest, "invalid-query", "kind must be avatar, custom, or full.");
             }
 
             var lookup = await portraits.EnsurePersonAsync(id, personId, cancellationToken);
@@ -274,6 +274,7 @@ internal static class SchoolEndpoints
             int id,
             string personId,
             string? kind,
+            GeneratePortraitRequest? body,
             PortraitService portraits,
             CancellationToken cancellationToken) =>
         {
@@ -284,7 +285,7 @@ internal static class SchoolEndpoints
 
             if (!PortraitKindParser.TryParse(kind, out var portraitKind))
             {
-                return Problem(StatusCodes.Status400BadRequest, "invalid-query", "kind must be avatar, half, or full.");
+                return Problem(StatusCodes.Status400BadRequest, "invalid-query", "kind must be avatar, custom, or full.");
             }
 
             if (!portraits.IsGenerationEnabled)
@@ -292,7 +293,7 @@ internal static class SchoolEndpoints
                 return Problem(StatusCodes.Status503ServiceUnavailable, "swarmui-not-configured", "SwarmUI is not configured.");
             }
 
-            var result = await portraits.GenerateAsync(id, personId, portraitKind, cancellationToken);
+            var result = await portraits.GenerateAsync(id, personId, portraitKind, body?.PromptExtra, cancellationToken);
             return result.Outcome switch
             {
                 PortraitGenerationOutcome.Succeeded => Results.Created(
@@ -300,8 +301,11 @@ internal static class SchoolEndpoints
                     new PortraitResponse(
                         PortraitKindParser.ToApiValue(portraitKind),
                         result.HasAvatar,
-                        result.HasHalfBody,
+                        result.HasCustom,
-                        result.HasFullBody)),
+                        result.HasFullBody,
+                        result.CustomPortraitPrompt)),
+                PortraitGenerationOutcome.InvalidPrompt =>
+                    Problem(StatusCodes.Status400BadRequest, "invalid-body", "Custom portraits need a non-empty promptExtra up to 2000 characters."),
                 PortraitGenerationOutcome.UnknownPerson =>
                     Problem(StatusCodes.Status404NotFound, "unknown-person", "That person is not in the school."),
                 PortraitGenerationOutcome.NotConfigured =>

src/HSchool.Server/Game/PortraitKind.cs

@@ -3,7 +3,7 @@ namespace HSchool.Server.Game;
 internal enum PortraitKind
 {
     Avatar,
-    Half,
+    Custom,
     Full,
 }
 
@@ -17,9 +17,9 @@ internal static class PortraitKindParser
             return true;
         }
 
-        if (string.Equals(value, "half", StringComparison.OrdinalIgnoreCase))
+        if (string.Equals(value, "custom", StringComparison.OrdinalIgnoreCase))
         {
-            kind = PortraitKind.Half;
+            kind = PortraitKind.Custom;
             return true;
         }
 
@@ -36,7 +36,7 @@ internal static class PortraitKindParser
     public static string ToApiValue(PortraitKind kind) => kind switch
     {
         PortraitKind.Avatar => "avatar",
-        PortraitKind.Half => "half",
+        PortraitKind.Custom => "custom",
         PortraitKind.Full => "full",
         _ => throw new ArgumentOutOfRangeException(nameof(kind)),
     };

src/HSchool.Server/Game/PortraitPromptBuilder.cs

@@ -5,7 +5,11 @@ namespace HSchool.Server.Game;
 /// <summary>Turns a person card into a Flux-style English prompt for SwarmUI.</summary>
 internal static class PortraitPromptBuilder
 {
-    public static (string Positive, string Negative) Build(PersonCardResponse card, SwarmUiSettings settings, PortraitKind kind)
+    public static (string Positive, string Negative) Build(
+        PersonCardResponse card,
+        SwarmUiSettings settings,
+        PortraitKind kind,
+        string? promptExtra = null)
     {
         var preset = settings.PresetFor(kind);
         var parts = new List<string>();
@@ -15,7 +19,14 @@ internal static class PortraitPromptBuilder
             parts.Add(settings.Positive.Trim());
         }
 
-        if (!string.IsNullOrWhiteSpace(preset.Positive))
+        if (kind == PortraitKind.Custom)
+        {
+            if (!string.IsNullOrWhiteSpace(promptExtra))
+            {
+                parts.Add(promptExtra.Trim());
+            }
+        }
+        else if (!string.IsNullOrWhiteSpace(preset.Positive))
         {
             parts.Add(preset.Positive.Trim());
         }

src/HSchool.Server/Game/PortraitService.cs

@@ -9,6 +9,8 @@ internal sealed class PortraitService(
     GameCommandQueue commands,
     ILogger<PortraitService> logger)
 {
+    public const int MaxCustomPromptLength = 2000;
+
     private static readonly TimeSpan PersonLookupTimeout = TimeSpan.FromSeconds(5);
 
     /// <summary>English labels for Swarm prompts, independent of the UI locale.</summary>
@@ -16,13 +18,20 @@ internal sealed class PortraitService(
 
     public bool IsGenerationEnabled => swarm.IsConfigured;
 
-    public (bool HasAvatar, bool HasHalfBody, bool HasFullBody) Flags(int schoolId, string personId) =>
+    public (bool HasAvatar, bool HasCustom, bool HasFullBody) Flags(int schoolId, string personId) =>
         store.PortraitFlags(schoolId, personId);
 
     public PersonCardResponse WithPortraitFlags(int schoolId, PersonCardResponse card)
     {
-        var (hasAvatar, hasHalfBody, hasFullBody) = Flags(schoolId, card.Id);
+        var (hasAvatar, hasCustom, hasFullBody) = Flags(schoolId, card.Id);
-        return card with { HasAvatar = hasAvatar, HasHalfBody = hasHalfBody, HasFullBody = hasFullBody };
+        var customPrompt = hasCustom ? store.TryReadCustomPortraitPrompt(schoolId, card.Id) : null;
+        return card with
+        {
+            HasAvatar = hasAvatar,
+            HasCustom = hasCustom,
+            HasFullBody = hasFullBody,
+            CustomPortraitPrompt = customPrompt,
+        };
     }
 
     public async Task<PersonLookupError> EnsurePersonAsync(
@@ -45,6 +54,7 @@ internal sealed class PortraitService(
         int schoolId,
         string personId,
         PortraitKind kind,
+        string? promptExtra,
         CancellationToken cancellationToken)
     {
         if (!swarm.IsConfigured)
@@ -52,6 +62,20 @@ internal sealed class PortraitService(
             return PortraitGenerationResult.NotConfigured;
         }
 
+        if (kind == PortraitKind.Custom)
+        {
+            promptExtra = promptExtra?.Trim();
+            if (string.IsNullOrWhiteSpace(promptExtra))
+            {
+                return PortraitGenerationResult.InvalidPrompt;
+            }
+
+            if (promptExtra.Length > MaxCustomPromptLength)
+            {
+                return PortraitGenerationResult.InvalidPrompt;
+            }
+        }
+
         var command = new GameCommand.GetPerson(
             schoolId,
             personId,
@@ -70,14 +94,20 @@ internal sealed class PortraitService(
             return PortraitGenerationResult.UnknownSchool;
         }
 
-        var (positive, negative) = PortraitPromptBuilder.Build(outcome.Card, settings, kind);
+        var (positive, negative) = PortraitPromptBuilder.Build(outcome.Card, settings, kind, promptExtra);
 
         try
         {
             var bytes = await swarm.GenerateAsync(positive, negative, settings, kind, cancellationToken);
-            store.SavePortrait(schoolId, personId, kind, bytes);
+            store.SavePortrait(schoolId, personId, kind, bytes, kind == PortraitKind.Custom ? promptExtra : null);
             var flags = Flags(schoolId, personId);
-            return PortraitGenerationResult.Succeeded(kind, flags.HasAvatar, flags.HasHalfBody, flags.HasFullBody);
+            var savedPrompt = kind == PortraitKind.Custom ? promptExtra : store.TryReadCustomPortraitPrompt(schoolId, personId);
+            return PortraitGenerationResult.Succeeded(
+                kind,
+                flags.HasAvatar,
+                flags.HasCustom,
+                flags.HasFullBody,
+                savedPrompt);
         }
         catch (TaskCanceledException ex) when (!cancellationToken.IsCancellationRequested)
         {
@@ -106,6 +136,7 @@ internal enum PortraitGenerationOutcome
     UnknownSchool,
     UnknownPerson,
     NotConfigured,
+    InvalidPrompt,
     Unavailable,
     TimedOut,
 }
@@ -114,26 +145,42 @@ internal sealed record PortraitGenerationResult(
     PortraitGenerationOutcome Outcome,
     PortraitKind Kind,
     bool HasAvatar,
-    bool HasHalfBody,
+    bool HasCustom,
-    bool HasFullBody)
+    bool HasFullBody,
+    string? CustomPortraitPrompt)
 {
     public static PortraitGenerationResult UnknownSchool { get; } =
-        new(PortraitGenerationOutcome.UnknownSchool, default, false, false, false);
+        new(PortraitGenerationOutcome.UnknownSchool, default, false, false, false, null);
 
     public static PortraitGenerationResult UnknownPerson { get; } =
-        new(PortraitGenerationOutcome.UnknownPerson, default, false, false, false);
+        new(PortraitGenerationOutcome.UnknownPerson, default, false, false, false, null);
 
     public static PortraitGenerationResult NotConfigured { get; } =
-        new(PortraitGenerationOutcome.NotConfigured, default, false, false, false);
+        new(PortraitGenerationOutcome.NotConfigured, default, false, false, false, null);
+
+    public static PortraitGenerationResult InvalidPrompt { get; } =
+        new(PortraitGenerationOutcome.InvalidPrompt, default, false, false, false, null);
 
     public static PortraitGenerationResult Unavailable { get; } =
-        new(PortraitGenerationOutcome.Unavailable, default, false, false, false);
+        new(PortraitGenerationOutcome.Unavailable, default, false, false, false, null);
 
     public static PortraitGenerationResult TimedOut { get; } =
-        new(PortraitGenerationOutcome.TimedOut, default, false, false, false);
+        new(PortraitGenerationOutcome.TimedOut, default, false, false, false, null);
 
-    public static PortraitGenerationResult Succeeded(PortraitKind kind, bool hasAvatar, bool hasHalfBody, bool hasFullBody) =>
+    public static PortraitGenerationResult Succeeded(
-        new(PortraitGenerationOutcome.Succeeded, kind, hasAvatar, hasHalfBody, hasFullBody);
+        PortraitKind kind,
+        bool hasAvatar,
+        bool hasCustom,
+        bool hasFullBody,
+        string? customPortraitPrompt) =>
+        new(PortraitGenerationOutcome.Succeeded, kind, hasAvatar, hasCustom, hasFullBody, customPortraitPrompt);
 }
 
-internal sealed record PortraitResponse(string Kind, bool HasAvatar, bool HasHalfBody, bool HasFullBody);
+internal sealed record GeneratePortraitRequest(string? PromptExtra);
+
+internal sealed record PortraitResponse(
+    string Kind,
+    bool HasAvatar,
+    bool HasCustom,
+    bool HasFullBody,
+    string? CustomPortraitPrompt);

src/HSchool.Server/Game/SchoolStore.cs

@@ -271,7 +271,7 @@ internal sealed class SchoolStore
     public bool HasPortrait(int schoolId, string personId, PortraitKind kind) =>
         File.Exists(PortraitPath(schoolId, personId, kind));
 
-    public (bool HasAvatar, bool HasHalfBody, bool HasFullBody) PortraitFlags(int schoolId, string personId)
+    public (bool HasAvatar, bool HasCustom, bool HasFullBody) PortraitFlags(int schoolId, string personId)
     {
         var directory = PortraitsDirectory(schoolId);
         if (!Directory.Exists(directory))
@@ -281,10 +281,22 @@ internal sealed class SchoolStore
 
         return (
             HasPortrait(schoolId, personId, PortraitKind.Avatar),
-            HasPortrait(schoolId, personId, PortraitKind.Half),
+            HasPortrait(schoolId, personId, PortraitKind.Custom),
             HasPortrait(schoolId, personId, PortraitKind.Full));
     }
 
+    public string CustomPortraitPromptPath(int schoolId, string personId)
+    {
+        var safeId = SanitizePersonId(personId);
+        return Path.Combine(PortraitsDirectory(schoolId), $"{safeId}.custom.prompt.txt");
+    }
+
+    public string? TryReadCustomPortraitPrompt(int schoolId, string personId)
+    {
+        var path = CustomPortraitPromptPath(schoolId, personId);
+        return File.Exists(path) ? File.ReadAllText(path) : null;
+    }
+
     public string PortraitPath(int schoolId, string personId, PortraitKind kind)
     {
         var safeId = SanitizePersonId(personId);
@@ -292,13 +304,21 @@ internal sealed class SchoolStore
         return Path.Combine(PortraitsDirectory(schoolId), $"{safeId}.{suffix}.png");
     }
 
-    public void SavePortrait(int schoolId, string personId, PortraitKind kind, ReadOnlySpan<byte> png)
+    public void SavePortrait(int schoolId, string personId, PortraitKind kind, ReadOnlySpan<byte> png, string? customPrompt = null)
     {
         var path = PortraitPath(schoolId, personId, kind);
         Directory.CreateDirectory(Path.GetDirectoryName(path)!);
         var temp = path + ".tmp";
         File.WriteAllBytes(temp, png);
         File.Move(temp, path, overwrite: true);
+
+        if (kind == PortraitKind.Custom && customPrompt is not null)
+        {
+            var promptPath = CustomPortraitPromptPath(schoolId, personId);
+            var promptTemp = promptPath + ".tmp";
+            File.WriteAllText(promptTemp, customPrompt);
+            File.Move(promptTemp, promptPath, overwrite: true);
+        }
     }
 
     private static string SanitizePersonId(string personId)

src/HSchool.Server/Game/SwarmUiSettings.cs

@@ -25,14 +25,14 @@ internal sealed class SwarmUiSettings
 
     public SwarmUiPreset Avatar { get; init; } = new();
 
-    public SwarmUiPreset HalfBody { get; init; } = new();
+    public SwarmUiPreset Custom { get; init; } = new();
 
     public SwarmUiPreset FullBody { get; init; } = new();
 
     public SwarmUiPreset PresetFor(PortraitKind kind) => kind switch
     {
         PortraitKind.Avatar => Avatar,
-        PortraitKind.Half => HalfBody,
+        PortraitKind.Custom => Custom,
         PortraitKind.Full => FullBody,
         _ => throw new ArgumentOutOfRangeException(nameof(kind)),
     };

src/HSchool.Server/swarmui.json

@@ -13,10 +13,9 @@
     "height": 1024,
     "positive": "close up, head and shoulders portrait, facing the camera, upper body visible."
   },
-  "halfBody": {
+  "custom": {
     "width": 896,
-    "height": 1152,
+    "height": 1152
-    "positive": "waist-up portrait, three-quarter view, facing the camera, outfit visible from waist up, school photo."
   },
   "fullBody": {
     "width": 896,

tests/HSchool.AppHost.Tests/PortraitApiTests.cs

@@ -107,7 +107,12 @@ public class PortraitApiTests(AppHostFixture fixture)
 
     private sealed record PersonListItem(string Id);
 
-    private sealed record PersonCardResponse(string Id, bool HasAvatar, bool HasHalfBody, bool HasFullBody);
+    private sealed record PersonCardResponse(
+        string Id,
+        bool HasAvatar,
+        bool HasCustom,
+        bool HasFullBody,
+        string? CustomPortraitPrompt);
 
     private sealed record SavesDirectoryResponse(string Path);
 }

tests/HSchool.Server.Tests/PortraitPromptBuilderTests.cs

@@ -43,19 +43,26 @@ public class PortraitPromptBuilderTests
     }
 
     [Fact]
-    public void Build_HalfBody_AddsHalfBodyPreset()
+    public void Build_Custom_UsesPromptExtraInsteadOfPreset()
     {
         var settings = new SwarmUiSettings
         {
             Positive = "School photo.",
-            HalfBody = new SwarmUiSettings.SwarmUiPreset { Positive = "Waist-up portrait." },
+            Avatar = new SwarmUiSettings.SwarmUiPreset { Positive = "Head and shoulders." },
             FullBody = new SwarmUiSettings.SwarmUiPreset { Positive = "Standing full body." },
         };
 
-        var (halfPositive, _) = PortraitPromptBuilder.Build(SampleCard(), settings, PortraitKind.Half);
+        const string extra = "standing in a school hallway, soft window light";
+        var (customPositive, _) = PortraitPromptBuilder.Build(
+            SampleCard(),
+            settings,
+            PortraitKind.Custom,
+            extra);
 
-        Assert.Contains("Waist-up portrait.", halfPositive, StringComparison.Ordinal);
+        Assert.Contains("School photo.", customPositive, StringComparison.Ordinal);
-        Assert.DoesNotContain("Standing full body.", halfPositive, StringComparison.Ordinal);
+        Assert.Contains(extra, customPositive, StringComparison.Ordinal);
+        Assert.DoesNotContain("Head and shoulders.", customPositive, StringComparison.Ordinal);
+        Assert.DoesNotContain("Standing full body.", customPositive, StringComparison.Ordinal);
     }
 
     private static PersonCardResponse SampleCard() =>