chore: unstage devel changes (#1786)

* Revert "chore: Update dist"

This reverts commit e8614cfbf0.

* Revert "chore(deps): bump @aws-sdk/client-sts from 3.1045.0 to 3.1049.0 (#1782)"

This reverts commit 4684f47f89.

* Revert "chore: Update dist"

This reverts commit 48b8685c96.

* Revert "chore(deps-dev): bump @smithy/property-provider from 4.3.1 to 4.3.3 (#1783)"

This reverts commit fe6ad3af19.

* Revert "chore: Update dist"

This reverts commit 2520c5e921.

* Revert "chore(deps-dev): bump @aws-sdk/credential-provider-env (#1784)"

This reverts commit bc1093db1d.

* Revert "chore(deps-dev): bump @types/node from 25.7.0 to 25.9.0 (#1785)"

This reverts commit ffde832a1d.

* Revert "chore: Update dist"

This reverts commit 707acd96f6.

* Revert "chore(deps): bump @smithy/node-http-handler from 4.7.1 to 4.7.3 (#1781)"

This reverts commit a7c33ae483.

* Revert "chore: update README for additional claim support (#1779)"

This reverts commit 713aaabfec.

* Revert "chore: Update dist"

This reverts commit e6e8eba750.

* Revert "fix: skip credential check on output-env-credentials: false (#1778)"

This reverts commit 58e7c47adf.

* Revert "chore: document forgejo compatibility (#1776)"

This reverts commit f35a7d7d7e.

* Revert "chore: Update dist"

This reverts commit 3884f59ecd.

* Revert "feat: add additional session tags by default (#1775)"

This reverts commit e0ba768507.

* Revert "chore: Update dist"

This reverts commit 6795889618.

* Revert "feat: expose run id in STS client user-agent (#1774)"

This reverts commit 29d1be3027.

* Revert "chore(deps-dev): bump @types/node from 25.6.0 to 25.7.0 (#1773)"

This reverts commit ef734cca81.

* Revert "chore(deps-dev): bump @biomejs/biome from 2.4.14 to 2.4.15 (#1772)"

This reverts commit 7521c55910.

* Revert "chore: Update dist"

This reverts commit c0e2737f14.

* Revert "chore(deps): bump @smithy/node-http-handler from 4.6.1 to 4.7.1 (#1770)"

This reverts commit dbd503f368.

* Revert "chore: Update dist"

This reverts commit 18a236fbd1.

* Revert "chore(deps-dev): bump @smithy/property-provider from 4.2.14 to 4.3.1 (#1771)"

This reverts commit 1ab31502aa.

* Revert "chore(deps-dev): bump @vitest/coverage-v8 from 4.1.5 to 4.1.6 (#1768)"

This reverts commit 1fb495c4b2.

* Revert "chore: Update dist"

This reverts commit 1e8fec8ea1.

* Revert "chore(deps): bump @aws-sdk/client-sts from 3.1044.0 to 3.1045.0 (#1767)"

This reverts commit a388f23f7d.

* Revert "chore: update documentation for environment workflows (#1766)"

This reverts commit 3f7e1b63d7.

* Revert "feat: add regex validation to role-session-name (#1765)"

This reverts commit e35449909c.

* Revert "chore: Update dist"

This reverts commit 958a80fc34.

* Revert "feat: add more retry logic and better logging (#1764)"

This reverts commit 540d0c13ae.

* Revert "chore: automate README version bumping (#1763)"

This reverts commit 07ada0fe07.

* Revert "chore: Update dist"

This reverts commit f8d4eb68a9.

* Revert "feat: support custom STS endpoints (#1762)"

This reverts commit 8d52d05d7a.

* Revert "chore: Update dist"

This reverts commit 681892c11b.

* Revert "chore: configure codeql to ignore generated code (#1760)"

This reverts commit dc2353e57a.

* Revert "feat: Allow custom session tags to be passed when assuming a role (#1759)"

This reverts commit 61f50f630f.

* Revert "chore: automatic major version tagging (#1565)"

This reverts commit c36525a567.

* Revert "chore: bump unit test node version (#1758)"

This reverts commit 39d1702721.

* Revert "chore(deps): bump @aws-sdk/client-sts from 3.1043.0 to 3.1044.0 (#1754)"

This reverts commit 4cfda40a13.

* Revert "chore(deps-dev): bump @biomejs/biome from 2.4.13 to 2.4.14 (#1756)"

This reverts commit 8856e12f3a.

* Revert "chore(deps): bump @actions/core from 2.0.3 to 3.0.1 (#1746)"

This reverts commit 64d8e82527.

* Revert "chore(deps-dev): bump vitest from 3.2.4 to 4.1.5 (#1748)"

This reverts commit 78f374f6d1.

src/CredentialsClient.ts

@@ -3,18 +3,15 @@ import { STSClient } from '@aws-sdk/client-sts';
 import type { AwsCredentialIdentity } from '@aws-sdk/types';
 import { NodeHttpHandler } from '@smithy/node-http-handler';
 import { ProxyAgent } from 'proxy-agent';
-import { buildCustomUserAgent, errorMessage, getCallerIdentity } from './helpers';
+import { errorMessage, getCallerIdentity } from './helpers';
 import { ProxyResolver } from './ProxyResolver';
 
-if (!process.env.AWS_EXECUTION_ENV) {
-  process.env.AWS_EXECUTION_ENV = 'GitHubActions';
-}
+const USER_AGENT = 'configure-aws-credentials-for-github-actions';
 
 export interface CredentialsClientProps {
   region?: string;
   proxyServer?: string;
   noProxy?: string;
-  stsEndpoint?: string;
   roleChaining: boolean;
 }
 
@@ -22,7 +19,6 @@ export class CredentialsClient {
   public region?: string;
   private _stsClient?: STSClient;
   private readonly requestHandler?: NodeHttpHandler;
-  private readonly stsEndpoint?: string;
   private roleChaining?: boolean;
 
   constructor(props: CredentialsClientProps) {
@@ -45,20 +41,19 @@ export class CredentialsClient {
         httpAgent: handler,
       });
     }
-    if (props.stsEndpoint) {
-      this.stsEndpoint = props.stsEndpoint;
-    }
     this.roleChaining = props.roleChaining;
   }
 
   public get stsClient(): STSClient {
     if (!this._stsClient || this.roleChaining) {
-      this._stsClient = new STSClient({
-        customUserAgent: buildCustomUserAgent(),
-        ...(this.region !== undefined && { region: this.region }),
-        ...(this.stsEndpoint !== undefined && { endpoint: this.stsEndpoint }),
-        ...(this.requestHandler !== undefined && { requestHandler: this.requestHandler }),
-      });
+      const config = { customUserAgent: USER_AGENT } as {
+        customUserAgent: string;
+        region?: string;
+        requestHandler?: NodeHttpHandler;
+      };
+      if (this.region !== undefined) config.region = this.region;
+      if (this.requestHandler !== undefined) config.requestHandler = this.requestHandler;
+      this._stsClient = new STSClient(config);
     }
     return this._stsClient;
   }