diff --git a/packages/walletkit/src/api/scripts/__fixtures__/model-patterns.fixture.ts b/packages/walletkit/src/api/scripts/__fixtures__/model-patterns.fixture.ts
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+++ b/packages/walletkit/src/api/scripts/__fixtures__/model-patterns.fixture.ts
@@ -0,0 +1,182 @@
+/**
+ * Copyright (c) TonTech.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ */
+
+/**
+ * Fixture covering every distinct TypeScript→JSON Schema pattern handled by generate-json-schema.js.
+ * Excluded from the normal TS build (*.fixture.ts in tsconfig exclude), but ts-json-schema-generator
+ * processes it explicitly via the `path` option.
+ */
+
+// ── 1. TypeScript enum → x-enum-varnames (camelCase member names, not values) ──
+
+export enum Direction {
+    North = 'north',
+    SouthWest = 'south_west', // member name "SouthWest" → varname "southWest"; value stays "south_west"
+}
+
+// ── 2. Const-object enum → definition renamed to const name, prefix stripped ──
+
+export const SettlementMethod = {
+    SETTLEMENT_METHOD_SWAP: 'SETTLEMENT_METHOD_SWAP',
+    SETTLEMENT_METHOD_ESCROW: 'SETTLEMENT_METHOD_ESCROW',
+} as const;
+export type SettlementMethodValue = (typeof SettlementMethod)[keyof typeof SettlementMethod];
+
+// ── 3. @format annotations: int → integer type; frozen → x-frozen object ──
+
+export interface AnnotatedFields {
+    /** @format int */
+    count: number;
+    /** @format frozen */
+    extra: unknown;
+    ratio: number; // plain number — must NOT be coerced to integer
+}
+
+// ── 4. @discriminator interface union (postProcessDiscriminatedUnions) ──
+//
+//   InfoNotification  → 2 remaining fields after discriminator removal → full variant
+//   AlertNotification → 1 remaining field                             → single-field variant
+//   PingNotification  → 0 remaining fields                            → empty variant
+
+/** @discriminator type */
+export type Notification = InfoNotification | AlertNotification | PingNotification;
+export type InfoNotification = { type: 'info'; title: string; body: string };
+export type AlertNotification = { type: 'alert'; level: string };
+export type PingNotification = { type: 'ping' };
+
+// ── 5. Inline type-literal union (DiscriminatedUnionNodeParser path, no @discriminator) ──
+//
+//   Members are inline TypeLiterals, not named type aliases.
+//   int/str have a `value` property → hasAssociatedValue: true + synthetic ref types
+//   empty has no `value`            → hasAssociatedValue: false
+
+export type StackItem = { type: 'int'; value: number } | { type: 'str'; value: string } | { type: 'empty' };
+
+// ── 6. Generic interface → x-is-generic, x-generic-params, x-generic-type-ref ──
+
+export interface Paginated<T> {
+    /** The page items */
+    items: T;
+    total: number;
+}
+
+// ── 7. Type alias → x-type-alias, x-alias-target ──
+
+export type AddressRef = { addr: string };
+export type WalletAlias = AddressRef; // pure $ref → becomes x-type-alias
+
+// ── 8. Standalone literal property → x-constant-fields (postProcessConstantFields) ──
+
+export interface Versioned {
+    version: 'v2'; // { const: 'v2' } → removed from properties, added to x-constant-fields
+    payload: string;
+}
+
+// ── 9. @default annotation → stripped by postProcessStripDefaults ──
+
+export interface WithDefaults {
+    /** @default true */
+    enabled: boolean;
+    count: number;
+}
+
+// ── 10. ALLCAPS enum member names → lowercase varnames (different toCamelCase branch) ──
+
+export enum Flags {
+    LOW = 0,
+    HIGH = 1,
+}
+
+// ── 11. Multiple standalone literal properties → x-constant-fields array length > 1 ──
+
+export interface Wire {
+    magic: '0xff';
+    version: '2';
+    payload: string;
+}
+
+// ── 12. @discriminator with a non-'type' field name ──
+//
+//   Confirms x-discriminator-field is not hardcoded to 'type'.
+//   PushEvent has 2 non-discriminator fields → full variant.
+//   TagEvent has 1 non-discriminator field  → single-field variant.
+
+/** @discriminator event */
+export type GitEvent = PushEvent | TagEvent;
+export type PushEvent = { event: 'push'; ref: string; branch: string };
+export type TagEvent = { event: 'tag'; ref: string };
+
+// ── 13. Discriminator rawValue with underscore → camelCase case name ──
+//
+//   toCamelCase('dark_mode') = 'darkMode' in buildInterfaceUnionSchema.
+//   Both variants have 2 non-discriminator fields so no single-field inlining noise.
+
+/** @discriminator type */
+export type Theme = ThemeDark | ThemeLight;
+export type ThemeDark = { type: 'dark_mode'; hex: string; opacity: number };
+export type ThemeLight = { type: 'light_mode'; hex: string; opacity: number };
+
+// ── 14. Optional single-field variant → x-single-field-optional ──
+//
+//   timeout is optional (?) → x-single-field-optional: true.
+//   StopCommand has 0 remaining fields → empty variant (control case).
+
+/** @discriminator type */
+export type Command = StartCommand | StopCommand;
+export type StartCommand = { type: 'start'; timeout?: number };
+export type StopCommand = { type: 'stop' };
+
+// ── 15. @format int32 / uint32 → integer type with the specific width format preserved ──
+//
+//   `number` + `@format int32` must coerce to { type: 'integer', format: 'int32' }. Same for the
+//   unsigned variant. These are distinct from the bare `@format int` case already covered above
+//   and prove the full INTEGER_FORMATS list is honoured.
+
+export interface WidthFormats {
+    /** @format int32 */
+    seqno: number;
+    /** @format uint32 */
+    timestampSec: number;
+}
+
+// ── 16. @format int64 → integer type with 64-bit format (the "bigint-like" lane) ──
+//
+//   JS/TS only reliably represents integers up to 2^53, so the wire format expects a number
+//   carrying up to 64 bits. `@format int64` keeps `type: 'integer'` with format preserved so
+//   downstream Swift/Kotlin templates can map it to Int64/Long instead of a smaller width.
+
+export interface Int64Fields {
+    /** @format int64 */
+    bigAmount: number;
+    /** @format uint64 */
+    unsignedBigAmount: number;
+}
+
+// ── 17. @format url → string type, format preserved, NO integer coercion ──
+//
+//   Covers the format-passthrough path: a non-integer @format tag must leave `type: 'string'`
+//   intact and just attach `format: 'url'`. Matches real usage on `DAppInfo.iconUrl`, etc.
+
+export interface WithUrl {
+    /** @format url */
+    iconUrl: string;
+    label: string; // plain string, must NOT gain a format
+}
+
+// ── 18. String-literal + ref union → x-string-literal-union (postProcessStringLiteralUnions, PR #361) ──
+//
+//   `type Endpoint = 'local' | 'remote_peer' | HostAlias` where `HostAlias = string`.
+//   ts-json-schema-generator hoists each literal to a synthetic single-value enum definition
+//   and emits the parent as an `anyOf` of `$ref`s. The post-processor must:
+//     • rewrite the parent to { type: 'object', x-string-literal-union: true, ... }
+//     • camelCase each literal rawValue into `x-literal-cases` (`'remote_peer'` → `'remotePeer'`)
+//     • pull the single $ref → string-alias target into `x-ref-case`
+//     • delete the synthetic single-value-literal definitions it hoisted.
+
+export type HostAlias = string;
+export type Endpoint = 'local' | 'remote_peer' | HostAlias;