diff --git a/packages/ai/CHANGELOG.md b/packages/ai/CHANGELOG.md
index 8a43f32f..58a32a70 100644
--- a/packages/ai/CHANGELOG.md
+++ b/packages/ai/CHANGELOG.md
@@ -17,9 +17,11 @@
 - `fauxProvider()` returns a faux `Provider` for tests built on explicit `Models` collections.
 - Image generation mirrors the chat-side design: `createImagesModels()`/`ImagesProvider`/`createImagesProvider()` with sync model reads, explicit `refresh()`, provider-resolved auth, and never-rejecting `generateImages()`; `openrouterImagesProvider()` factory plus `builtinImagesProviders()`/`builtinImagesModels()` in `providers/all`. The `ImagesProvider` id type alias is renamed to `ImagesProviderId`; the old global image API stays on `/compat`.
 - When Amazon Bedrock rejects an unsupported data retention mode, the error now links the AWS data retention documentation ([#5561](https://github.com/earendil-works/pi/pull/5561) by [@unexge](https://github.com/unexge)).
+- Provider auth results can carry provider-scoped environment values that `Models` and `ImagesModels` merge into API implementation options.
 
 ### Fixed
 
+- Fixed Amazon Bedrock endpoint resolution to honor scoped `AWS_PROFILE` values.
 - Fixed OpenCode Go GLM-5.2 metadata to expose `xhigh` reasoning and send `reasoning_effort: "max"` ([#5967](https://github.com/earendil-works/pi/issues/5967)).
 - Fixed Claude Fable 5 thinking-off requests to omit Anthropic's unsupported `thinking.type: "disabled"` payload ([#5567](https://github.com/earendil-works/pi/pull/5567) by [@tmustier](https://github.com/tmustier)).
 
diff --git a/packages/ai/src/auth/types.ts b/packages/ai/src/auth/types.ts
index 74bb45bf..6cb285cf 100644
--- a/packages/ai/src/auth/types.ts
+++ b/packages/ai/src/auth/types.ts
@@ -1,4 +1,4 @@
-import type { Api, ImagesApi, ImagesModel, Model } from "../types.ts";
+import type { Api, ImagesApi, ImagesModel, Model, ProviderEnv } from "../types.ts";
 import type { OAuthCredentials } from "../utils/oauth/types.ts";
 
 /**
@@ -78,6 +78,8 @@ export interface AuthContext {
 /** Result of resolving auth for a model. */
 export interface AuthResult {
 	auth: ModelAuth;
+	/** Provider-scoped environment/config values resolved from credentials and ambient context. */
+	env?: ProviderEnv;
 	/** Human-readable label for status UI: "ANTHROPIC_API_KEY", "OAuth", "~/.aws/credentials". */
 	source?: string;
 }
diff --git a/packages/ai/src/images-models.ts b/packages/ai/src/images-models.ts
index 67449b03..8dd655d4 100644
--- a/packages/ai/src/images-models.ts
+++ b/packages/ai/src/images-models.ts
@@ -192,11 +192,13 @@ class ImagesModelsImpl implements MutableImagesModels {
 
 			const requestModel = auth.baseUrl ? { ...model, baseUrl: auth.baseUrl } : model;
 
-			// Explicit request options win per-field; headers merge per header.
+			// Explicit request options win per-field; headers/env merge per key.
 			const apiKey = options?.apiKey ?? auth.apiKey;
 			const headers = auth.headers || options?.headers ? { ...auth.headers, ...options?.headers } : undefined;
+			const env =
+				resolution.env || options?.env ? { ...(resolution.env ?? {}), ...(options?.env ?? {}) } : undefined;
 
-			return await provider.generateImages(requestModel, context, { ...options, apiKey, headers });
+			return await provider.generateImages(requestModel, context, { ...options, apiKey, headers, env });
 		} catch (error) {
 			return {
 				api: model.api,
diff --git a/packages/ai/src/models.ts b/packages/ai/src/models.ts
index 47ed7c8a..de17f8ec 100644
--- a/packages/ai/src/models.ts
+++ b/packages/ai/src/models.ts
@@ -236,10 +236,11 @@ class ModelsImpl implements MutableModels {
 
 		const requestModel = auth.baseUrl ? { ...model, baseUrl: auth.baseUrl } : model;
 
-		// Explicit request options win per-field; headers merge per header.
+		// Explicit request options win per-field; headers/env merge per key.
 		const apiKey = options?.apiKey ?? auth.apiKey;
 		const headers = auth.headers || options?.headers ? { ...auth.headers, ...options?.headers } : undefined;
-		const requestOptions = { ...options, apiKey, headers } as TOptions;
+		const env = resolution.env || options?.env ? { ...(resolution.env ?? {}), ...(options?.env ?? {}) } : undefined;
+		const requestOptions = { ...options, apiKey, headers, env } as TOptions;
 
 		return { requestModel, requestOptions };
 	}
diff --git a/packages/ai/src/types.ts b/packages/ai/src/types.ts
index 48a6961e..35b79b7c 100644
--- a/packages/ai/src/types.ts
+++ b/packages/ai/src/types.ts
@@ -239,6 +239,11 @@ export interface ProviderImages {
 export interface ImagesOptions {
 	signal?: AbortSignal;
 	apiKey?: string;
+	/**
+	 * Provider-scoped environment values. These take precedence over process.env for
+	 * provider configuration such as endpoint placeholders and proxy variables.
+	 */
+	env?: ProviderEnv;
 	/**
 	 * Optional callback for inspecting or replacing provider payloads before sending.
 	 * Return undefined to keep the payload unchanged.
diff --git a/packages/ai/test/images-models.test.ts b/packages/ai/test/images-models.test.ts
index 1b2e08da..0a2a9e56 100644
--- a/packages/ai/test/images-models.test.ts
+++ b/packages/ai/test/images-models.test.ts
@@ -102,6 +102,45 @@ describe("ImagesModels", () => {
 		expect(calls[1].options?.apiKey).toBe("explicit");
 	});
 
+	it("merges provider-resolved env into image options", async () => {
+		const calls: GenerateCall[] = [];
+		const models = createImagesModels();
+		models.setProvider(
+			createImagesProvider({
+				id: "p1",
+				auth: {
+					apiKey: {
+						name: "Test key",
+						resolve: async () => ({
+							auth: { apiKey: "provider-key" },
+							env: { PROVIDER_ONLY: "provider", SHARED: "provider" },
+						}),
+					},
+				},
+				models: [testImageModel("p1", "model-a")],
+				api: {
+					generateImages: async (model, _context, options) => {
+						calls.push({ model, options });
+						return okResult(model);
+					},
+				},
+			}),
+		);
+		const model = models.getModel("p1", "model-a")!;
+
+		await models.generateImages(model, context, {
+			apiKey: "request-key",
+			env: { REQUEST_ONLY: "request", SHARED: "request" },
+		});
+
+		expect(calls[0].options?.apiKey).toBe("request-key");
+		expect(calls[0].options?.env).toEqual({
+			PROVIDER_ONLY: "provider",
+			REQUEST_ONLY: "request",
+			SHARED: "request",
+		});
+	});
+
 	it("returns an error result for unknown providers and unconfigured auth rejections", async () => {
 		const models = createImagesModels({ authContext: fakeAuthContext({}) });
 		const ghost = await models.generateImages(testImageModel("ghost", "m"), context);
diff --git a/packages/ai/test/providers.test.ts b/packages/ai/test/providers.test.ts
index 3e6320a9..56a72b68 100644
--- a/packages/ai/test/providers.test.ts
+++ b/packages/ai/test/providers.test.ts
@@ -168,6 +168,47 @@ describe("createProvider", () => {
 		expect(calls).toEqual(["a:model-a", "b:model-b"]);
 	});
 
+	it("merges provider-resolved env into stream options", async () => {
+		let capturedEnv: Record<string, string> | undefined;
+		let capturedApiKey: string | undefined;
+		const envModel = { ...testModel("api-a", "model-a"), provider: "env-provider" };
+		const provider = createProvider({
+			id: "env-provider",
+			auth: {
+				apiKey: {
+					name: "Test",
+					resolve: async () => ({
+						auth: { apiKey: "provider-key" },
+						env: { PROVIDER_ONLY: "provider", SHARED: "provider" },
+					}),
+				},
+			},
+			models: [envModel],
+			api: {
+				stream: (model, _context, options) => {
+					capturedEnv = options?.env;
+					capturedApiKey = options?.apiKey;
+					return recordingStreams("a", []).stream(model, _context, options);
+				},
+				streamSimple: (model, _context, options) => {
+					capturedEnv = options?.env;
+					capturedApiKey = options?.apiKey;
+					return recordingStreams("a", []).streamSimple(model, _context, options);
+				},
+			},
+		});
+		const models = createModels();
+		models.setProvider(provider);
+
+		await models.completeSimple(envModel, context, {
+			apiKey: "request-key",
+			env: { REQUEST_ONLY: "request", SHARED: "request" },
+		});
+
+		expect(capturedApiKey).toBe("request-key");
+		expect(capturedEnv).toEqual({ PROVIDER_ONLY: "provider", REQUEST_ONLY: "request", SHARED: "request" });
+	});
+
 	it("produces a stream error for a model whose api has no implementation", async () => {
 		const provider = createProvider({
 			id: "mixed",