diff --git a/packages/1-prisma-cloud/0-lowering/lowering/src/__tests__/deploy-source-headers.test.ts b/packages/1-prisma-cloud/0-lowering/lowering/src/__tests__/deploy-source-headers.test.ts
new file mode 100644
index 00000000..7788a4ef
--- /dev/null
+++ b/packages/1-prisma-cloud/0-lowering/lowering/src/__tests__/deploy-source-headers.test.ts
@@ -0,0 +1,39 @@
+import { afterEach, describe, expect, test } from 'bun:test';
+import pkg from '../../package.json' with { type: 'json' };
+import { deploySourceHeaders } from '../credentials.ts';
+
+describe('deploySourceHeaders', () => {
+  const originalEnv = process.env['GITHUB_ACTIONS'];
+
+  afterEach(() => {
+    if (originalEnv === undefined) {
+      delete process.env['GITHUB_ACTIONS'];
+    } else {
+      process.env['GITHUB_ACTIONS'] = originalEnv;
+    }
+  });
+
+  test('uses "github-action" as source when GITHUB_ACTIONS is "true"', () => {
+    process.env['GITHUB_ACTIONS'] = 'true';
+    expect(deploySourceHeaders()['x-prisma-deploy-source']).toBe('github-action');
+  });
+
+  test('uses "composer" as source outside GitHub Actions', () => {
+    delete process.env['GITHUB_ACTIONS'];
+    expect(deploySourceHeaders()['x-prisma-deploy-source']).toBe('composer');
+  });
+
+  test('uses "composer" as source when GITHUB_ACTIONS has another value', () => {
+    process.env['GITHUB_ACTIONS'] = 'false';
+    expect(deploySourceHeaders()['x-prisma-deploy-source']).toBe('composer');
+  });
+
+  test('always sets x-prisma-client-name to "composer"', () => {
+    expect(deploySourceHeaders()['x-prisma-client-name']).toBe('composer');
+  });
+
+  test('sets x-prisma-client-version to the package version', () => {
+    expect(pkg.version.length).toBeGreaterThan(0);
+    expect(deploySourceHeaders()['x-prisma-client-version']).toBe(pkg.version);
+  });
+});
diff --git a/packages/1-prisma-cloud/0-lowering/lowering/src/client.ts b/packages/1-prisma-cloud/0-lowering/lowering/src/client.ts
index ac6f9490..2cbee49f 100644
--- a/packages/1-prisma-cloud/0-lowering/lowering/src/client.ts
+++ b/packages/1-prisma-cloud/0-lowering/lowering/src/client.ts
@@ -4,7 +4,7 @@ import * as Context from 'effect/Context';
 import * as Effect from 'effect/Effect';
 import * as Layer from 'effect/Layer';
 import * as Redacted from 'effect/Redacted';
-import { managementApiBaseUrl, PrismaCredentials } from './credentials.ts';
+import { deploySourceHeaders, managementApiBaseUrl, PrismaCredentials } from './credentials.ts';
 
 export type ManagementApiClient = ReturnType<typeof createManagementApiClient>;
 
@@ -31,6 +31,10 @@ export const layer = (options?: {
     Effect.gen(function* () {
       const { token } = yield* PrismaCredentials;
       const baseUrl = options?.apiOrigin ?? (yield* managementApiBaseUrl());
-      return createManagementApiClient({ token: Redacted.value(token), baseUrl });
+      return createManagementApiClient({
+        token: Redacted.value(token),
+        baseUrl,
+        headers: deploySourceHeaders(),
+      });
     }),
   );
diff --git a/packages/1-prisma-cloud/0-lowering/lowering/src/credentials.ts b/packages/1-prisma-cloud/0-lowering/lowering/src/credentials.ts
index e462d981..cd114b76 100644
--- a/packages/1-prisma-cloud/0-lowering/lowering/src/credentials.ts
+++ b/packages/1-prisma-cloud/0-lowering/lowering/src/credentials.ts
@@ -3,6 +3,7 @@ import * as Context from 'effect/Context';
 import * as Effect from 'effect/Effect';
 import * as Layer from 'effect/Layer';
 import type * as Redacted from 'effect/Redacted';
+import pkg from '../package.json' with { type: 'json' };
 
 /**
  * The Prisma service token used to authenticate Management API calls. Kept
@@ -64,6 +65,17 @@ const normalizeBaseUrl = (value: string): Effect.Effect<string, Error> =>
         : new Error(`Invalid Prisma Management API URL: ${String(cause)}`),
   });
 
+/**
+ * Headers the Management API records in its deploy analytics: which tool sent
+ * the request, and whether it ran in GitHub Actions. The API behaves the same
+ * without them.
+ */
+export const deploySourceHeaders = (): Record<string, string> => ({
+  'x-prisma-deploy-source': process.env['GITHUB_ACTIONS'] === 'true' ? 'github-action' : 'composer',
+  'x-prisma-client-name': 'composer',
+  'x-prisma-client-version': pkg.version,
+});
+
 /**
  * The Management API origin every Prisma-Cloud client in this package uses —
  * Composer's own SDK client AND upstream alchemy's postgres providers resolve
diff --git a/packages/1-prisma-cloud/0-lowering/lowering/src/providers.ts b/packages/1-prisma-cloud/0-lowering/lowering/src/providers.ts
index 20d0fa0c..58bcef87 100644
--- a/packages/1-prisma-cloud/0-lowering/lowering/src/providers.ts
+++ b/packages/1-prisma-cloud/0-lowering/lowering/src/providers.ts
@@ -3,8 +3,15 @@ import * as Prisma from 'alchemy/Prisma';
 import * as Provider from 'alchemy/Provider';
 import * as Effect from 'effect/Effect';
 import * as Layer from 'effect/Layer';
+import * as HttpClient from 'effect/unstable/http/HttpClient';
+import * as HttpClientRequest from 'effect/unstable/http/HttpClientRequest';
 import * as client from './client.ts';
-import { fromEnv, managementApiBaseUrl, PrismaCredentials } from './credentials.ts';
+import {
+  deploySourceHeaders,
+  fromEnv,
+  managementApiBaseUrl,
+  PrismaCredentials,
+} from './credentials.ts';
 
 /** The collection of Prisma resource providers. */
 export class Providers extends Provider.ProviderCollection<Providers>()('PrismaComposer') {}
@@ -32,6 +39,19 @@ const prismaEnvironment = () =>
     }),
   );
 
+/**
+ * A node:http transport that adds deploy-source headers to every request.
+ * Used privately by upstreamPrismaProviders — not exposed as the ambient
+ * HttpClient, so the artifact-upload path is unaffected.
+ */
+const prismaManagementHttpLayer = Layer.effect(
+  HttpClient.HttpClient,
+  Effect.gen(function* () {
+    const base = yield* HttpClient.HttpClient;
+    return HttpClient.mapRequest(base, HttpClientRequest.setHeaders(deploySourceHeaders()));
+  }),
+).pipe(Layer.provide(NodeHttpClient.layerNodeHttp));
+
 /**
  * Upstream alchemy's live providers for the postgres family (Project,
  * Database, Connection), the compute family (App, Deployment,
@@ -56,10 +76,10 @@ const upstreamPrismaProviders = () =>
     Prisma.BucketAccessKeyProvider(),
   ).pipe(
     Layer.provideMerge(Prisma.PrismaClientLive),
-    // Provide (NOT provideMerge) the node transport privately — mirrors
+    // Provide (NOT provideMerge) the transport privately — mirrors
     // upstream's Providers.ts: it must serve only the Prisma management
     // client, never override the ambient HttpClient of other providers.
-    Layer.provide(NodeHttpClient.layerNodeHttp),
+    Layer.provide(prismaManagementHttpLayer),
     Layer.provideMerge(prismaEnvironment()),
   );