diff --git a/README.md b/README.md
index 6c03451..e5e3032 100644
--- a/README.md
+++ b/README.md
@@ -13,7 +13,7 @@ Try it without installing anything: [playground](https://docs.openapi-ng.dev/pla
 - **Two layouts.** Per-tag `@Injectable` services by default, or `--layout operations` for one tree-shakeable constant per operation, callable from any injection context or bound once with `withInjector()`.
 - **Strict OpenAPI subset.** A focused 3.x slice with clear diagnostics. No silent misgeneration; see [Assumptions & limitations](https://docs.openapi-ng.dev/reference/limitations/) for the accepted shape.
 - **Configurable naming.** Tune method names and service grouping with template + regex rules, via YAML, JSON, or TypeScript config.
-- **Thin, pass-through helpers.** Generated methods just build the request (method, URL, query, body) and forward every `HttpClient.request` / `httpResource` option through unchanged — `withCredentials`, `transferCache`, `reportProgress`, `equal`, `injector`, and the rest. The response reaches you untouched.
+- **Thin, pass-through helpers.** Generated methods just build the request (method, URL, query, body) and forward every `HttpClient.request` / `httpResource` option through unchanged — `withCredentials`, `transferCache`, `reportUploadProgress`, `equal`, `injector`, and the rest. The response reaches you untouched.
 
 ## Install
 
diff --git a/__test__/angular-consumer/src/service-proof.ts b/__test__/angular-consumer/src/service-proof.ts
index 49f42cc..ef3450f 100644
--- a/__test__/angular-consumer/src/service-proof.ts
+++ b/__test__/angular-consumer/src/service-proof.ts
@@ -1,6 +1,12 @@
 import type { PetRest, UpdatePetParams } from '../generated/rest/pet.rest';
-import type { HttpEvent, HttpResourceRef, HttpResponse } from '@angular/common/http';
+import type {
+  HttpClient,
+  HttpEvent,
+  HttpResourceRef,
+  HttpResponse,
+} from '@angular/common/http';
 import { Pet, PetList } from '../generated/model.ts';
+import type { ObservableOptions } from '../generated/rest.model';
 import { Observable } from 'rxjs';
 import type { ResourceParamsContext } from '@angular/core';
 import type {
@@ -37,7 +43,7 @@ const listPetsObservableResponse = service.listPets.observable({
 });
 const listPetsObservableEvents = service.listPets.observable({
   observe: 'events',
-  reportProgress: true,
+  reportDownloadProgress: true,
 });
 
 expectType<string>(listPetsRequest.url);
@@ -99,9 +105,38 @@ const updatePetObservableResponse = service.updatePet.observable(request, {
 });
 const updatePetObservableEvents = service.updatePet.observable(request, {
   observe: 'events',
-  reportProgress: true,
+  reportDownloadProgress: true,
+});
+
+// Every HttpClient.request option the operation does not supply itself passes
+// through, so options added by a later Angular need no regeneration.
+type PassThroughOptions = Omit<
+  NonNullable<Parameters<HttpClient['request']>[2]>,
+  'body' | 'params' | 'headers' | 'responseType'
+>;
+// A non-literal argument skips excess-property checks, so compare keys too.
+declare const missingOptionKey: Exclude<
+  keyof PassThroughOptions,
+  keyof ObservableOptions
+>;
+expectType<never>(missingOptionKey);
+declare const everyRequestOption: Required<PassThroughOptions>;
+service.updatePet.observable(request, everyRequestOption);
+service.updatePet.observable(request, {
+  integrity: 'sha256-x',
+  referrerPolicy: 'no-referrer',
+  reportUploadProgress: true,
 });
 
+// @ts-expect-error — the operation supplies the body
+service.updatePet.observable(request, { body: {} });
+// @ts-expect-error — the operation supplies the query params
+service.updatePet.observable(request, { params: {} });
+// @ts-expect-error — the operation supplies the headers
+service.updatePet.observable(request, { headers: {} });
+// @ts-expect-error — the response type is fixed per operation
+service.updatePet.observable(request, { responseType: 'text' });
+
 expectType<string>(updatePetRequest.url);
 expectType<Observable<Pet>>(updatePetObservable);
 expectType<HttpResourceRef<Pet | undefined>>(updatePetResource);
@@ -133,6 +168,6 @@ expectType<Observable<HttpResponse<void>>>(
 expectType<Observable<HttpEvent<void>>>(
   requestVoidFactory.observable(
     { id: 'x' },
-    { observe: 'events', reportProgress: true },
+    { observe: 'events', reportDownloadProgress: true },
   ),
 );
diff --git a/__test__/snapshots/generate-native/static-template/rest.model.ts b/__test__/snapshots/generate-native/static-template/rest.model.ts
index d36d6d0..57b6275 100644
--- a/__test__/snapshots/generate-native/static-template/rest.model.ts
+++ b/__test__/snapshots/generate-native/static-template/rest.model.ts
@@ -1,6 +1,6 @@
 import type { Injector } from '@angular/core';
 import type {
-  HttpContext,
+  HttpClient,
   HttpHeaders,
   HttpParams,
   HttpResourceOptions,
@@ -65,23 +65,10 @@ export interface OperationRequestOptions {
   injector?: Injector;
 }
 
-// Omits body/params/headers (generator supplies them) and responseType
-// (fixed per requestFactory variant). Structurally compatible with
-// HttpClient.request(method, url, options) so the runtime spread doesn't
-// need a Parameters<…>[2] cast. `injector` is consumed by the runtime and
-// never reaches HttpClient; when given it wins over a `withInjector()` binding.
-export type ObservableOptions = {
-  injector?: Injector;
-  context?: HttpContext;
-  observe?: 'body' | 'response' | 'events';
-  reportProgress?: boolean;
-  transferCache?: { includeHeaders?: string[] } | boolean;
-  withCredentials?: boolean;
-  keepalive?: boolean;
-  redirect?: RequestRedirect;
-  mode?: RequestMode;
-  credentials?: RequestCredentials;
-  priority?: RequestPriority;
-  cache?: RequestCache;
-  timeout?: number;
-};
+// `Parameters` reads request()'s last overload, its catch-all, so options a later
+// Angular adds pass through. The operation supplies body/params/headers and fixes
+// responseType; `injector` is consumed by the runtime and never reaches HttpClient.
+export type ObservableOptions = Omit<
+  NonNullable<Parameters<HttpClient['request']>[2]>,
+  'body' | 'params' | 'headers' | 'responseType'
+> & { injector?: Injector };
diff --git a/templates/angular/rest.model.ts b/templates/angular/rest.model.ts
index d36d6d0..57b6275 100644
--- a/templates/angular/rest.model.ts
+++ b/templates/angular/rest.model.ts
@@ -1,6 +1,6 @@
 import type { Injector } from '@angular/core';
 import type {
-  HttpContext,
+  HttpClient,
   HttpHeaders,
   HttpParams,
   HttpResourceOptions,
@@ -65,23 +65,10 @@ export interface OperationRequestOptions {
   injector?: Injector;
 }
 
-// Omits body/params/headers (generator supplies them) and responseType
-// (fixed per requestFactory variant). Structurally compatible with
-// HttpClient.request(method, url, options) so the runtime spread doesn't
-// need a Parameters<…>[2] cast. `injector` is consumed by the runtime and
-// never reaches HttpClient; when given it wins over a `withInjector()` binding.
-export type ObservableOptions = {
-  injector?: Injector;
-  context?: HttpContext;
-  observe?: 'body' | 'response' | 'events';
-  reportProgress?: boolean;
-  transferCache?: { includeHeaders?: string[] } | boolean;
-  withCredentials?: boolean;
-  keepalive?: boolean;
-  redirect?: RequestRedirect;
-  mode?: RequestMode;
-  credentials?: RequestCredentials;
-  priority?: RequestPriority;
-  cache?: RequestCache;
-  timeout?: number;
-};
+// `Parameters` reads request()'s last overload, its catch-all, so options a later
+// Angular adds pass through. The operation supplies body/params/headers and fixes
+// responseType; `injector` is consumed by the runtime and never reaches HttpClient.
+export type ObservableOptions = Omit<
+  NonNullable<Parameters<HttpClient['request']>[2]>,
+  'body' | 'params' | 'headers' | 'responseType'
+> & { injector?: Injector };
diff --git a/website/src/content/docs/guides/angular.md b/website/src/content/docs/guides/angular.md
index fd13419..afb0f5c 100644
--- a/website/src/content/docs/guides/angular.md
+++ b/website/src/content/docs/guides/angular.md
@@ -421,7 +421,10 @@ options object to switch observation modes or to forward extra
 ```ts
 this.#petRest.updatePet.observable(req);
 this.#petRest.updatePet.observable(req, { observe: 'response' });
-this.#petRest.updatePet.observable(req, { observe: 'events', reportProgress: true });
+this.#petRest.updatePet.observable(req, {
+  observe: 'events',
+  reportUploadProgress: true,
+});
 ```
 
 | Options                          | Return type                   |
@@ -430,13 +433,15 @@ this.#petRest.updatePet.observable(req, { observe: 'events', reportProgress: tru
 | `{ observe: 'response' }`        | `Observable<HttpResponse<T>>` |
 | `{ observe: 'events' }`          | `Observable<HttpEvent<T>>`    |
 
-The options bag mirrors `HttpClient.request`'s options minus the
-fields the generator already supplies — `body`, `params`, `headers`,
-and `responseType` are baked in from the operation, so the type
-rejects them. Everything else is forwarded: `withCredentials`,
-`reportProgress`, `transferCache`, `context`, `keepalive`, and the
-Fetch-related options (`redirect`, `mode`, `credentials`, `priority`,
-`cache`, `timeout`).
+The options bag is `HttpClient.request`'s own options type, read from
+your installed Angular, minus the fields the generator already
+supplies — `body`, `params`, `headers`, and `responseType` are baked
+in from the operation, so the type rejects them. Everything else is
+forwarded: `withCredentials`, `transferCache`, `context`, the progress
+and Fetch-related options, and any option a later Angular adds,
+without regenerating. Deprecations carry over the same way: on
+Angular 22 your editor marks `reportProgress` as deprecated, as it
+does on `HttpClient` itself.
 
 For void-response operations (204 No Content), the same overloads
 still apply — `Observable<HttpResponse<void>>` is meaningful when you