chore(main): release 6.1.0 (#1717)

Bumps [vite](https://github.com/vitejs/vite/tree/HEAD/packages/vite) from 7.1.11 to 7.3.2.
- [Release notes](https://github.com/vitejs/vite/releases)
- [Changelog](https://github.com/vitejs/vite/blob/v7.3.2/packages/vite/CHANGELOG.md)
- [Commits](https://github.com/vitejs/vite/commits/v7.3.2/packages/vite)

---
updated-dependencies:
- dependency-name: vite
  dependency-version: 7.3.2
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.generatelicensefile.json

@@ -0,0 +1,6 @@
+{
+  "inputs": ["./package.json"],
+  "output": "./THIRD-PARTY",
+  "overwrite": true,
+  "ci": true
+}

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,9 +1,11 @@
-*Issue #, if available:*
+_Issue #, if available:_
 
-*Description of changes:*
+_Description of changes:_
 
 ---
 
-* [ ] Have you followed the guidelines in our [Contributing guide?](https://github.com/aws-actions/configure-aws-credentials/blob/main/CONTRIBUTING.md)
+- [ ] Have you followed the guidelines in our
+      [Contributing guide?](https://github.com/aws-actions/configure-aws-credentials/blob/main/CONTRIBUTING.md)
 
-By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.
+By submitting this pull request, I confirm that you can use, modify, copy, and
+redistribute this contribution, under the terms of your choice.

.github/integ_tests/tinyproxy.conf

@@ -0,0 +1,6 @@
+Port 9999
+Listen 127.0.0.1
+Timeout 600
+Allow 127.0.0.1
+LogFile "/home/runner/work/configure-aws-credentials/configure-aws-credentials/integ_proxy_log.txt"
+LogLevel Connect

.github/workflows/automerge-approved-prs.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Configure AWS credentials
-        uses: aws-actions/configure-aws-credentials@v4
+        uses: aws-actions/configure-aws-credentials@v6
         with:
           aws-region: us-west-2
           role-to-assume: ${{ secrets.SECRETS_AWS_PACKAGING_ROLE_TO_ASSUME }}
@@ -24,7 +24,7 @@ jobs:
         with:
           parse-json-secrets: true
           secret-ids: |
-            OSDS,arn:aws:secretsmanager:us-west-2:206735643321:secret:github-aws-sdk-osds-automation-gebs9n
+            ${{ secrets.OSDS_PACKAGING_ROLE }}
       - name: Enable PR automerge
         run: gh pr merge --auto --squash "$PR_URL"
         env:

.github/workflows/dependabot-autoapprove.yml

@@ -1,6 +1,6 @@
 name: Dependabot auto-approve
-on: 
-  pull_request:
+on:
+  pull_request_target:
   workflow_dispatch:
 
 permissions:
@@ -15,20 +15,20 @@ jobs:
       - name: Get Metadata
         id: dependabot-metadata
         uses: dependabot/fetch-metadata@v2
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         name: Clone repo
       - name: Configure AWS credentials
-        uses: aws-actions/configure-aws-credentials@v4
+        uses: aws-actions/configure-aws-credentials@v6
         with:
           aws-region: us-west-2
-          role-to-assume: arn:aws:iam::206735643321:role/ConfigureAwsCredentialsPackageRole
+          role-to-assume: ${{ secrets.CONFIGUREAWSCREDENTIALSPACKAGEROLEARN }}
           role-duration-seconds: 900
       - name: Get bot user token
         uses: aws-actions/aws-secretsmanager-get-secrets@v2
         with:
           parse-json-secrets: true
           secret-ids: |
-            OSDS,arn:aws:secretsmanager:us-west-2:206735643321:secret:github-aws-sdk-osds-automation-gebs9n
+            ${{ secrets.OSDS_PACKAGING_ROLE }}
       - name: Approve PR if not already approved
         run: |
           gh pr checkout "$PR_URL"

.github/workflows/package-dist.yml

@@ -17,7 +17,7 @@ jobs:
       contents: read
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           fetch-depth: 0
           ref: ${{ github.ref_name }}
@@ -28,7 +28,7 @@ jobs:
           npm test
           npm run package
       - name: Configure AWS credentials
-        uses: aws-actions/configure-aws-credentials@v4
+        uses: aws-actions/configure-aws-credentials@v6
         with:
           aws-region: us-west-2
           role-to-assume: ${{ secrets.SECRETS_AWS_PACKAGING_ROLE_TO_ASSUME }}
@@ -39,7 +39,7 @@ jobs:
         with:
           parse-json-secrets: true
           secret-ids: |
-            OSDS,arn:aws:secretsmanager:us-west-2:206735643321:secret:github-aws-sdk-osds-automation-gebs9n
+            ${{ secrets.OSDS_PACKAGING_ROLE }}
       - name: Commit
         run: |
           echo "::add-mask::${{ env.OSDS_ACCESS_TOKEN }}"
@@ -47,5 +47,6 @@ jobs:
           git config user.email "github-aws-sdk-osds-automation@amazon.com"
           git remote set-url origin https://${{ env.OSDS_ACCESS_TOKEN }}@github.com/aws-actions/configure-aws-credentials.git
           git add dist
+          git add THIRD-PARTY
           git commit -m "chore: Update dist" || echo "No changes to commit"
           git push --force origin

.github/workflows/release-please.yml

@@ -4,6 +4,7 @@
     push:
       branches:
         - main
+    workflow_dispatch:
 
   permissions:
     id-token: write
@@ -15,12 +16,12 @@
       runs-on: ubuntu-latest
       steps:
         - name: Checkout Repository
-          uses: actions/checkout@v4
+          uses: actions/checkout@v5
           with:
             fetch-depth: 0
 
         - name: Configure AWS Credentials
-          uses: aws-actions/configure-aws-credentials@v4
+          uses: aws-actions/configure-aws-credentials@v6
           with:
             aws-region: us-west-2
             role-to-assume: ${{ secrets.SECRETS_AWS_PACKAGING_ROLE_TO_ASSUME }}
@@ -32,7 +33,7 @@
           with:
             parse-json-secrets: true
             secret-ids: |
-              OSDS,arn:aws:secretsmanager:us-west-2:206735643321:secret:github-aws-sdk-osds-automation-gebs9n
+              ${{ secrets.OSDS_PACKAGING_ROLE }}
 
         - name: Run release-please
           uses: googleapis/release-please-action@v4
@@ -41,3 +42,4 @@
             token: ${{ env.OSDS_ACCESS_TOKEN }}
             config-file: release-please-config.json
             manifest-file: .release-please-manifest.json
+            

.github/workflows/tests-integ-push.yml

@@ -0,0 +1,32 @@
+name: Run post-release integration test
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - 'dist/**'  
+  workflow_dispatch:
+
+jobs:
+  package_and_test:
+    name: Package dist files
+    runs-on: ubuntu-latest
+    permissions:
+      id-token: write
+      contents: read
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v5
+        with:
+          fetch-depth: 0
+          persist-credentials: false
+      - name: Integation tests
+        uses: ./
+        with:
+          aws-region: us-west-2
+          role-to-assume: ${{ secrets.CAWSC_integ_role }}
+          role-session-name: IntegTestCAWSC
+      - name: Get caller identity
+        run: |
+          aws sts get-caller-identity

.github/workflows/tests-integ-release.yml

@@ -0,0 +1,281 @@
+name: Run pre-release integ tests
+on: 
+    pull_request_target:
+    workflow_dispatch:
+permissions:
+    contents: read
+
+jobs:
+  oidc:
+    if: ${{ github.event_name == 'workflow_dispatch' || (github.event.pull_request.user.login == 'aws-sdk-osds' && github.repository == 'aws-actions/configure-aws-credentials') }}
+    permissions: 
+        id-token: write
+    strategy: 
+        fail-fast: false
+        matrix:
+            os: [windows-latest, ubuntu-latest, macos-latest]
+    runs-on: ${{ matrix.os }}
+    name: OIDC login test
+    steps:
+      - name: checkout
+        uses: actions/checkout@v5
+        with:
+            fetch-depth: 0
+            persist-credentials: false
+      - name: Configure AWS credentials
+        uses: ./
+        with:
+            aws-region: us-west-2
+            role-to-assume: ${{ secrets.OIDC_integ_role }}
+      - name: Get Caller Identity
+        run: |
+            aws sts get-caller-identity
+
+  #can cut this test out if it's not necessary
+  static_assumeRole:
+    if: ${{ github.event_name == 'workflow_dispatch' || (github.event.pull_request.user.login == 'aws-sdk-osds' && github.repository == 'aws-actions/configure-aws-credentials') }}
+    permissions:
+        id-token: write
+    strategy: 
+        fail-fast: false
+        matrix:
+            os: [windows-latest, ubuntu-latest, macos-latest]
+    runs-on: ${{ matrix.os }}
+    defaults: 
+        run:
+            shell: bash
+    name: Static IAM creds test
+    steps:
+      - name: checkout
+        uses: actions/checkout@v5
+        with:
+            fetch-depth: 0
+            persist-credentials: false
+      - name: assume creator Role
+        uses: ./
+        with:
+            aws-region: us-west-2
+            role-to-assume: ${{ secrets.STATIC_USER_CREATION_ROLE }}
+      - name: create and mask access key
+        id: create-key
+        run: | 
+            AK_OUTPUT=$(aws iam create-access-key --user-name integ-test-static-user-${{ runner.os }})
+            AK_ID=$(echo $AK_OUTPUT | jq -r '.AccessKey.AccessKeyId')
+            SECRET_AK=$(echo $AK_OUTPUT | jq -r '.AccessKey.SecretAccessKey')
+            echo "::add-mask::$AK_ID"
+            echo "::add-mask::$SECRET_AK"
+            echo "STATIC_ACCESS_KEY_ID=$AK_ID" >> $GITHUB_OUTPUT
+            echo "STATIC_SECRET_ACCESS_KEY=$SECRET_AK" >> $GITHUB_OUTPUT
+      - name: sleep so key can propagate
+        run: sleep 30
+      - name: assume role with static creds
+        uses: ./
+        with:
+            aws-region: us-west-2
+            role-to-assume: ${{ secrets.STATIC_TEST_TARGET_ROLE }}
+            aws-access-key-id: ${{ steps.create-key.outputs.STATIC_ACCESS_KEY_ID }}
+            aws-secret-access-key: ${{ steps.create-key.outputs.STATIC_SECRET_ACCESS_KEY }}
+      - name: check account
+        run: aws sts get-caller-identity
+      - name: log back into creator role
+        if: success() || failure()
+        uses: ./
+        with:
+            aws-region: us-west-2
+            role-to-assume: ${{ secrets.STATIC_USER_CREATION_ROLE }}
+      - name: delete access key
+        if: success() || failure()
+        run: |
+            aws iam delete-access-key --user-name integ-test-static-user-${{ runner.os }} --access-key-id ${{ steps.create-key.outputs.STATIC_ACCESS_KEY_ID }}
+
+  role_chaining:
+    if: ${{ github.event_name == 'workflow_dispatch' || (github.event.pull_request.user.login == 'aws-sdk-osds' && github.repository == 'aws-actions/configure-aws-credentials') }}
+    permissions: 
+        id-token: write
+    strategy: 
+        fail-fast: false
+        matrix:
+            os: [windows-latest, ubuntu-latest, macos-latest]
+    runs-on: ${{ matrix.os }}
+    name: Existing Creds + Role Chaining test
+    steps:
+      - name: checkout
+        uses: actions/checkout@v5
+        with:
+            fetch-depth: 0
+            persist-credentials: false    
+      - name: Configure AWS credentials
+        uses: ./
+        with:
+            aws-region: us-west-2
+            role-to-assume: ${{ secrets.ROLE_chaining_1 }}
+      - name: Get Caller Identity
+        run: |
+          aws sts get-caller-identity
+      - name: assume second role
+        uses: ./
+        with:
+            aws-region: us-west-2
+            role-to-assume: ${{ secrets.ROLE_chaining_2 }}
+            role-chaining: true
+      - name: get caller identity
+        run: |
+          aws sts get-caller-identity
+
+  inline_policy:
+    if: ${{ github.event_name == 'workflow_dispatch' || (github.event.pull_request.user.login == 'aws-sdk-osds' && github.repository == 'aws-actions/configure-aws-credentials') }}
+    permissions: 
+        id-token: write
+    strategy: 
+        fail-fast: false
+        matrix:
+            os: [ubuntu-latest, macos-latest]
+    runs-on: ${{ matrix.os }}
+    name: Inline Policy Test
+    steps:
+      - name: checkout
+        uses: actions/checkout@v5
+        with:
+            fetch-depth: 0
+            persist-credentials: false  
+      - name: get creds w scoped down policy
+        uses: ./
+        with: 
+            aws-region: us-west-2
+            role-to-assume: ${{ secrets.INLINE_policy_role }}
+            inline-session-policy: '{"Version":"2012-10-17","Statement":[{"Sid":"Stmt1","Effect":"Allow","Action":"s3:ListAllMyBuckets","Resource":"*"}]}'
+    
+      #NOTE: This step should succeed. The role should have permission only to list all buckets.
+      - name: list buckets
+        run: aws s3 ls > /dev/null
+
+      #NOTE: This step should fail. we don't want the role to have permission to see the bucket contents.    
+      - name: try to list bucket contents
+        id: bucketContentsStep
+        continue-on-error: true
+        run: aws s3 ls s3://cawsc-integ-tests-bucket > /dev/null
+
+      #But the test fails if we could list the bucket contents.
+      - name: fail if we can list bucket contents
+        if: steps.bucketContentsStep.outcome == 'success'
+        run: exit 1
+
+  http-proxy:
+    if: ${{ github.event_name == 'workflow_dispatch' || (github.event.pull_request.user.login == 'aws-sdk-osds' && github.repository == 'aws-actions/configure-aws-credentials') }}
+    permissions:
+        id-token: write
+    runs-on: ubuntu-latest
+    name: HTTP Proxy Test
+    steps:
+      - name: checkout
+        uses: actions/checkout@v5
+        with:
+            fetch-depth: 0
+            persist-credentials: false  
+      - name: install tinyproxy
+        run: |
+          sudo apt-get update
+          sudo apt-get -y install tinyproxy
+      - name: start tinyproxy
+        run: tinyproxy -c .github/integ_tests/tinyproxy.conf
+      - name: Configure AWS credentials
+        continue-on-error: true
+        uses: ./
+        with:
+            aws-region: us-west-2
+            role-to-assume: ${{ secrets.OIDC_integ_role }}
+            http-proxy: http://127.0.0.1:9999
+            retry-max-attempts: 4
+      - name: checkout logs 
+        run: cat integ_proxy_log.txt
+      - name: check logs to see if successful call
+        run: grep -q "Request" integ_proxy_log.txt && echo "PROXY_CALL_LOGGED=1" >> $GITHUB_ENV || echo "PROXY_CALL_LOGGED=0" >> $GITHUB_ENV
+      - name: fail job if bad call 
+        if: ${{ env.PROXY_CALL_LOGGED != 1 }}
+        run: exit 1
+
+  token-file:
+    if: ${{ github.event_name == 'workflow_dispatch' || (github.event.pull_request.user.login == 'aws-sdk-osds' && github.repository == 'aws-actions/configure-aws-credentials') }}
+    permissions:
+        id-token: write
+    strategy: 
+      fail-fast: false
+      matrix:
+        os: [windows-latest, ubuntu-latest, macos-latest]
+    runs-on: ${{ matrix.os }}
+    name: Token File Test
+    steps:
+      - name: checkout
+        uses: actions/checkout@v5
+        with:
+            fetch-depth: 0
+            persist-credentials: false
+      - name: fetch token and write to file
+        uses: actions/github-script@v8
+        with:
+          script: |
+            const fs = require('fs');
+            async function getIDTokenAction() {
+              const id_token = await core.getIDToken("sts.amazonaws.com");
+              return id_token;
+            }
+            const idToken = await getIDTokenAction();
+            fs.writeFileSync(".github/integ_tests/integ_token.txt", idToken, (err) => {
+              if (err) throw err;
+            });
+      - name: get creds with that file
+        uses: ./
+        with:
+            aws-region: us-west-2
+            role-to-assume: ${{ secrets.OIDC_integ_role }}
+            web-identity-token-file: .github/integ_tests/integ_token.txt
+            retry-max-attempts: 4
+      - name: check creds
+        run: aws sts get-caller-identity
+
+  profile-oidc:
+    if: ${{ github.event_name == 'workflow_dispatch' || (github.event.pull_request.user.login == 'aws-sdk-osds' && github.repository == 'aws-actions/configure-aws-credentials') }}
+    permissions: 
+        id-token: write
+    strategy: 
+        fail-fast: false
+        matrix:
+            os: [windows-latest, ubuntu-latest, macos-latest]
+    runs-on: ${{ matrix.os }}
+    name: OIDC profile writing test
+    steps:
+      - name: checkout
+        uses: actions/checkout@v5
+        with:
+            fetch-depth: 0
+            persist-credentials: false
+
+      - name: make profile 1
+        uses: ./
+        with: 
+          aws-region: us-east-1
+          role-to-assume: ${{ secrets.INTEG_PROFILE_ROLE_1 }}
+          aws-profile: TestProfile1
+
+      - name: make profile 2
+        uses: ./
+        with: 
+          aws-region: us-east-2
+          role-to-assume: ${{ secrets.INTEG_PROFILE_ROLE_2 }}
+          aws-profile: TestProfile2
+          
+      - name: check profile1 
+        run: aws sts get-caller-identity --profile TestProfile1
+      
+      - name: check profile2
+        run: aws sts get-caller-identity --profile TestProfile2
+
+      - name: Get Caller Identity
+        id: no-creds-sts-step
+        continue-on-error: true
+        run: |
+            aws sts get-caller-identity
+
+      - name: fail if we got caller id with env creds
+        if: steps.no-creds-sts-step.outcome == 'success'
+        run: exit 1

.github/workflows/tests-integ.yml

@@ -1,112 +0,0 @@
-name: Run Integ tests
-
-on:
-  workflow_dispatch:
-
-jobs:
-  integ-oidc:
-    permissions:
-      contents: read
-      id-token: write
-    strategy:
-      fail-fast: false
-      matrix:
-        os: [[self-hosted, linux-fargate], windows-latest, ubuntu-latest, macos-latest]
-    name: Run OIDC integ tests
-    runs-on: ${{ matrix.os }}
-    timeout-minutes: 30
-    steps:
-      - name: "Checkout repository"
-        uses: actions/checkout@v4
-      - name: Integ test for OIDC
-        uses: ./
-        with:
-          aws-region: us-west-2
-          role-to-assume: ${{ secrets.SECRETS_OIDC_AWS_ROLE_TO_ASSUME }}
-          role-duration-seconds: 900
-          role-session-name: IntegOidcAssumeRole
-          role-external-id: ${{ secrets.SECRETS_OIDC_AWS_ROLE_EXTERNAL_ID }}
-  integ-oidc-env:
-    permissions:
-      contents: read
-      id-token: write
-    strategy:
-      fail-fast: false
-      matrix:
-        os: [[self-hosted, linux-fargate], windows-latest, ubuntu-latest, macos-latest]
-    name: Run OIDC integ tests with existing invalid env vars
-    runs-on: ${{ matrix.os }}
-    env:
-      AWS_ACCESS_KEY_ID: dummyaccesskeyid
-      AWS_SECRET_ACCESS_KEY: dummysecretkey
-      AWS_SESSION_TOKEN: dummytoken
-    timeout-minutes: 30
-    steps:
-      - name: "Checkout repository"
-        uses: actions/checkout@v4
-      - name: Integ test for OIDC
-        uses: ./
-        with:
-          aws-region: us-west-2
-          role-to-assume: ${{ secrets.SECRETS_OIDC_AWS_ROLE_TO_ASSUME }}
-          role-duration-seconds: 900
-          role-session-name: IntegOidcAssumeRole
-          role-external-id: ${{ secrets.SECRETS_OIDC_AWS_ROLE_EXTERNAL_ID }}
-  integ-access-keys:
-    strategy:
-      fail-fast: false
-      matrix:
-        os: [[self-hosted, linux-fargate], windows-latest, ubuntu-latest, macos-latest]
-    name: Run access key integ tests
-    runs-on: ${{ matrix.os }}
-    timeout-minutes: 30
-    steps:
-      - name: "Checkout repository"
-        uses: actions/checkout@v4
-      - name: Integ test for access keys
-        uses: ./
-        with:
-          aws-region: us-west-2
-          aws-access-key-id: ${{ secrets.AWS_ACCESS_KEY_ID }}
-          aws-secret-access-key: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
-          role-to-assume: ${{ secrets.SECRETS_AWS_ROLE_TO_ASSUME }}
-          role-session-name: IntegAccessKeysAssumeRole
-          role-external-id: ${{ secrets.SECRETS_AWS_ROLE_EXTERNAL_ID }}
-  integ-access-keys-env:
-    strategy:
-      fail-fast: false
-      matrix:
-        os: [[self-hosted, linux-fargate], windows-latest, ubuntu-latest, macos-latest]
-    name: Run access key from env integ tests
-    runs-on: ${{ matrix.os }}
-    timeout-minutes: 30
-    steps:
-      - name: "Checkout repository"
-        uses: actions/checkout@v4
-      - name: Integ test for access keys
-        uses: ./
-        env:
-          AWS_ACCESS_KEY_ID: ${{ secrets.AWS_ACCESS_KEY_ID }}
-          AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
-        with:
-          aws-region: us-west-2
-          role-to-assume: ${{ secrets.SECRETS_AWS_ROLE_TO_ASSUME }}
-          role-session-name: IntegAccessKeysAssumeRole
-          role-external-id: ${{ secrets.SECRETS_AWS_ROLE_EXTERNAL_ID }}
-  integ-iam-user:
-    strategy:
-      fail-fast: false
-      matrix:
-        os: [[self-hosted, linux-fargate], windows-latest, ubuntu-latest, macos-latest]
-    name: Run IAM User integ tests
-    runs-on: ${{ matrix.os }}
-    timeout-minutes: 30
-    steps:
-      - name: "Checkout repository"
-        uses: actions/checkout@v4
-      - name: Integ test for IAM user
-        uses: ./
-        with:
-          aws-region: us-west-2
-          aws-access-key-id: ${{ secrets.AWS_ACCESS_KEY_ID }}
-          aws-secret-access-key: ${{ secrets.AWS_SECRET_ACCESS_KEY }}

.github/workflows/tests-unit.yml

@@ -2,6 +2,8 @@ on:
   [pull_request]
 
 name: Run unit tests
+permissions:
+  contents: read
 
 jobs:
   unit-test:
@@ -14,13 +16,13 @@ jobs:
     timeout-minutes: 5
     steps:
       - name: "Checkout repository"
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
       - name: "Setup node"
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v4.4.0
         with:
           node-version: 20
       - name: "Install dependencies"
-        uses: bahmutov/npm-install@v1
+        run: npm ci
       - name: "Run tests"
         run: npm run test --if-present
   lint:
@@ -29,7 +31,7 @@ jobs:
     timeout-minutes: 5
     steps:
       - name: "Checkout repostiory"
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
       - name: "Setup node"
         uses: actions/setup-node@v4
         with:

.markdownlint.yaml

@@ -0,0 +1,17 @@
+default: true
+MD007:
+  indent: 4
+heading-style:
+  style: atx
+ul-style:
+  style: dash
+line-length:
+  stern: true
+  tables: false
+  code_blocks: false
+no-inline-html:
+  allowed_elements:
+    - details
+    - summary
+code-block-style:
+  style: fenced

.release-please-manifest.json

@@ -1,5 +1,5 @@
 {
   ".release-please-manifest.json": "4.0.2",
-  "package.json": "4.0.2",
-  ".": "4.2.1"
+  "package.json": "6.0.0",
+  ".": "6.1.0"
 }

CHANGELOG.md

@@ -2,6 +2,90 @@
 
 All notable changes to this project will be documented in this file. See [standard-version](https://github.com/conventional-changelog/standard-version) for commit guidelines.
 
+## [6.1.0](https://github.com/aws-actions/configure-aws-credentials/compare/v6.0.0...v6.1.0) (2026-04-06)
+
+
+### Features
+
+* add skip cleanup option ([#1716](https://github.com/aws-actions/configure-aws-credentials/issues/1716)) ([11b1c58](https://github.com/aws-actions/configure-aws-credentials/commit/11b1c58b24724e66aa52a847862a0c1b0c4b0c7b)), closes [#1545](https://github.com/aws-actions/configure-aws-credentials/issues/1545)
+* Support usage of AWS Profiles ([#1696](https://github.com/aws-actions/configure-aws-credentials/issues/1696)) ([a7f0c82](https://github.com/aws-actions/configure-aws-credentials/commit/a7f0c828ac76e0d049e34c920172c60f579f9eb3))
+
+## [6.0.0](https://github.com/aws-actions/configure-aws-credentials/compare/v5.1.1...v6.0.0) (2026-02-04)
+
+
+### ⚠ BREAKING CHANGES
+
+* Update action to use node24 ([#1632](https://github.com/aws-actions/configure-aws-credentials/pull/1632)) ([a7a2c11](https://github.com/aws-actions/configure-aws-credentials/commit/a7a2c1125c67f40a1e95768f4e4a7d8f019f87af))
+
+### Features
+
+* add support to define transitive tag keys ([#1316](https://github.com/aws-actions/configure-aws-credentials/pull/1316)) ([232435c](https://github.com/aws-actions/configure-aws-credentials/commit/232435c0c05e51137544f0203931b84893d13b74)) ([930ebd9](https://github.com/aws-actions/configure-aws-credentials/pull/1628/changes/930ebd9bcaed959c3ba9e21567e8abbc3cae72c0))
+
+### Bug Fixes
+
+* properly output `aws-account-id` and `authenticated-arn` when using role-chaining ([#1633](https://github.com/aws-actions/configure-aws-credentials/pull/1633)) ([7ceaf96](https://github.com/aws-actions/configure-aws-credentials/commit/7ceaf96edc86cc1713cef59eba79feeb23f59da1))
+
+## [5.1.1](https://github.com/aws-actions/configure-aws-credentials/compare/v5.1.0...v5.1.1) (2025-11-24)
+
+
+### Miscellaneous Chores
+
+* release 5.1.1 ([56d6a58](https://github.com/aws-actions/configure-aws-credentials/commit/56d6a583f00f6bad6d19d91d53a7bc3b8143d0e9))
+
+## [5.1.0](https://github.com/aws-actions/configure-aws-credentials/compare/v5.0.0...v5.1.0) (2025-10-06)
+
+
+### Features
+
+* Add global timeout support ([#1487](https://github.com/aws-actions/configure-aws-credentials/issues/1487)) ([1584b8b](https://github.com/aws-actions/configure-aws-credentials/commit/1584b8b0e2062557287c28fbe9b8920df434e866))
+* add no-proxy support ([#1482](https://github.com/aws-actions/configure-aws-credentials/issues/1482)) ([dde9b22](https://github.com/aws-actions/configure-aws-credentials/commit/dde9b22a8e889a0821997a21a2c5a38020ee8de3))
+* Improve debug logging in retry logic ([#1485](https://github.com/aws-actions/configure-aws-credentials/issues/1485)) ([97ef425](https://github.com/aws-actions/configure-aws-credentials/commit/97ef425d73aa532439f54f90d0e83101a186c5a6))
+
+
+### Bug Fixes
+
+* properly expose getProxyForUrl (introduced in [#1482](https://github.com/aws-actions/configure-aws-credentials/issues/1482)) ([#1486](https://github.com/aws-actions/configure-aws-credentials/issues/1486)) ([cea4298](https://github.com/aws-actions/configure-aws-credentials/commit/cea42985ac88b42678fbc84c18066a7f07f05176))
+
+## [5.0.0](https://github.com/aws-actions/configure-aws-credentials/compare/v4.3.1...v5.0.0) (2025-09-03)
+
+
+### ⚠ BREAKING CHANGES
+
+* Cleanup input handling. Changes invalid boolean input behavior (see #1445)
+
+### Features
+
+* add skip OIDC option ([#1458](https://github.com/aws-actions/configure-aws-credentials/issues/1458)) ([8c45f6b](https://github.com/aws-actions/configure-aws-credentials/commit/8c45f6b08196feb86cfdbe431541d5571d9ab2c2))
+* Cleanup input handling. Changes invalid boolean input behavior (see [#1445](https://github.com/aws-actions/configure-aws-credentials/issues/1445)) ([74b3e27](https://github.com/aws-actions/configure-aws-credentials/commit/74b3e27aa80db064b5bb8c04b22fc607e817acf7))
+* support account id allowlist ([#1456](https://github.com/aws-actions/configure-aws-credentials/issues/1456)) ([c4be498](https://github.com/aws-actions/configure-aws-credentials/commit/c4be498953fc1da2707a50ce4b761a53af3d02af))
+
+## [4.3.1](https://github.com/aws-actions/configure-aws-credentials/compare/v4.3.0...v4.3.1) (2025-08-04)
+
+
+### Bug Fixes
+
+* update readme to 4.3.1 ([#1424](https://github.com/aws-actions/configure-aws-credentials/issues/1424)) ([be2e7ad](https://github.com/aws-actions/configure-aws-credentials/commit/be2e7ad815e27b890489a89ce2717b0f9e26b56e))
+
+## [4.3.0](https://github.com/aws-actions/configure-aws-credentials/compare/v4.2.1...v4.3.0) (2025-08-04)
+
+
+### Features
+
+* depenency update and feature cleanup ([#1414](https://github.com/aws-actions/configure-aws-credentials/issues/1414)) ([59489ba](https://github.com/aws-actions/configure-aws-credentials/commit/59489ba544930000b7b67412c167f5fe816568cf)), closes [#1062](https://github.com/aws-actions/configure-aws-credentials/issues/1062) [#1191](https://github.com/aws-actions/configure-aws-credentials/issues/1191)
+* Optional environment variable output ([c3b3ce6](https://github.com/aws-actions/configure-aws-credentials/commit/c3b3ce61b02510937ff02916a4eb153874bc5085))
+
+
+### Bug Fixes
+
+* **docs:** readme samples versioning ([5b3c895](https://github.com/aws-actions/configure-aws-credentials/commit/5b3c89504689ea1ea2b6000b23a6a2aac463662a))
+* the wrong example region for China partition in README ([37fe9a7](https://github.com/aws-actions/configure-aws-credentials/commit/37fe9a740bcb30ee8cccd96feb90666c937311f2))
+* properly set proxy environment variable ([cbea708](https://github.com/aws-actions/configure-aws-credentials/commit/cbea70821e4ab985ad3be0e5a93390523e257cde))
+
+
+### Miscellaneous Chores
+
+* release 4.3.0 ([3f7c218](https://github.com/aws-actions/configure-aws-credentials/commit/3f7c2187213bafaa1ea60a850b27082cbf55dda0))
+
 ## [4.2.1](https://github.com/aws-actions/configure-aws-credentials/compare/v4.2.0...v4.2.1) (2025-05-14)
 
 

CODE_OF_CONDUCT.md

@@ -1,4 +1,8 @@
-## Code of Conduct
-This project has adopted the [Amazon Open Source Code of Conduct](https://aws.github.io/code-of-conduct).
-For more information see the [Code of Conduct FAQ](https://aws.github.io/code-of-conduct-faq) or contact
-opensource-codeofconduct@amazon.com with any additional questions or comments.
+# Code of Conduct
+
+This project has adopted the
+[Amazon Open Source Code of Conduct](https://aws.github.io/code-of-conduct). For
+more information see the
+[Code of Conduct FAQ](https://aws.github.io/code-of-conduct-faq) or contact
+<opensource-codeofconduct@amazon.com> with any additional questions or
+comments.

CONTRIBUTING.md

@@ -1,61 +1,117 @@
 # Contributing Guidelines
 
-Thank you for your interest in contributing to our project. Whether it's a bug report, new feature, correction, or additional
-documentation, we greatly value feedback and contributions from our community.
-
-Please read through this document before submitting any issues or pull requests to ensure we have all the necessary
-information to effectively respond to your bug report or contribution.
+Thank you for your interest in contributing to our project. Whether it's a bug
+report, new feature, correction, or additional documentation, we greatly value
+feedback and contributions from our community.
 
+Please read through this document before submitting any issues or pull requests
+to ensure we have all the necessary information to effectively respond to your
+bug report or contribution.
 
 ## Reporting Bugs/Feature Requests
 
-We welcome you to use the GitHub issue tracker to report bugs or suggest features.
+We welcome you to use the GitHub issue tracker to report bugs or suggest
+features.
 
-When filing an issue, please check [existing open](https://github.com/aws-actions/configure-aws-credentials/issues), or [recently closed](https://github.com/aws-actions/configure-aws-credentials/issues?utf8=%E2%9C%93&q=is%3Aissue%20is%3Aclosed%20), issues to make sure somebody else hasn't already
-reported the issue. Please try to include as much information as you can. Details like these are incredibly useful:
+When filing an issue, please check [existing open][open-issues],
+or [recently closed][closed-issues], issues to make sure somebody
+else hasn't already reported the issue.
 
-* A reproducible test case or series of steps
-* The version of our code being used
-* Any modifications you've made relevant to the bug
-* Anything unusual about your environment or deployment
+[open-issues]: https://github.com/aws-actions/configure-aws-credentials/issues
+[closed-issues]: https://github.com/aws-actions/configure-aws-credentials/issues?utf8=%E2%9C%93&q=is%3Aissue%20is%3Aclosed%20
 
+Please try to include as much information as you can. Details like
+these are incredibly useful:
+
+- A reproducible test case or series of steps
+- The version of our code being used
+- Any modifications you've made relevant to the bug
+- Anything unusual about your environment or deployment
 
 ## Contributing via Pull Requests
-Contributions via pull requests are much appreciated. Before sending us a pull request, please ensure that:
 
-1. You are working against the latest source on the *main* branch.
-2. You check existing open, and recently merged, pull requests to make sure someone else hasn't addressed the problem already.
-3. You open an issue to discuss any significant work - we would hate for your time to be wasted.
+Contributions via pull requests are much appreciated. Before sending us a pull
+request, please ensure that:
+
+1. You are working against the latest source on the _main_ branch.
+2. You check existing open, and recently merged, pull requests to make sure
+   someone else hasn't addressed the problem already.
+3. You open an issue to discuss any significant work - we would hate for your
+   time to be wasted.
 
 To send us a pull request, please:
 
 1. Fork the repository.
-2. Modify the source; please focus on the specific change you are contributing. If you also reformat all the code, it will be hard for us to focus on your change.
+2. Modify the source; please focus on the specific change you are contributing.
+   If you also reformat all the code, it will be hard for us to focus on your
+   change.
 3. Ensure local tests pass.
 4. Commit to your fork using clear commit messages.
-5. Send us a pull request, answering any default questions in the pull request interface.
-6. Pay attention to any automated CI failures reported in the pull request, and stay involved in the conversation.
+5. Send us a pull request, answering any default questions in the pull request
+   interface.
+6. Pay attention to any automated CI failures reported in the pull request, and
+   stay involved in the conversation.
 
-GitHub provides additional document on [forking a repository](https://help.github.com/articles/fork-a-repo/) and
-[creating a pull request](https://help.github.com/articles/creating-a-pull-request/).
+GitHub provides additional document on
+[forking a repository](https://help.github.com/articles/fork-a-repo/) and
+[creating a pull request][create-pr].
 
+[create-pr]:
+  https://help.github.com/articles/creating-a-pull-request/
 
 ## Finding contributions to work on
-Looking at the existing issues is a great way to find something to contribute on. As our projects, by default, use the default GitHub issue labels (enhancement/bug/duplicate/help wanted/invalid/question/wontfix), looking at any ['help wanted'](https://github.com/aws-actions/configure-aws-credentials/labels/help%20wanted) issues is a great place to start.
 
+Looking at the existing issues is a great way to find something to contribute
+on. As our projects, by default, use the default GitHub issue labels
+(enhancement/bug/duplicate/help wanted/invalid/question/wontfix), looking at any
+['help wanted'](https://github.com/aws-actions/configure-aws-credentials/labels/help%20wanted)
+issues is a great place to start.
 
 ## Code of Conduct
-This project has adopted the [Amazon Open Source Code of Conduct](https://aws.github.io/code-of-conduct).
-For more information see the [Code of Conduct FAQ](https://aws.github.io/code-of-conduct-faq) or contact
-opensource-codeofconduct@amazon.com with any additional questions or comments.
 
+This project has adopted the
+[Amazon Open Source Code of Conduct](https://aws.github.io/code-of-conduct). For
+more information see the
+[Code of Conduct FAQ](https://aws.github.io/code-of-conduct-faq) or contact
+<opensource-codeofconduct@amazon.com> with any additional questions or
+comments.
 
 ## Security issue notifications
-If you discover a potential security issue in this project we ask that you notify AWS/Amazon Security via our [vulnerability reporting page](http://aws.amazon.com/security/vulnerability-reporting/). Please do **not** create a public github issue.
 
+If you discover a potential security issue in this project we ask that you
+notify AWS/Amazon Security via our
+[vulnerability reporting page][vuln-report].
+
+[vuln-report]:
+  http://aws.amazon.com/security/vulnerability-reporting/
+Please do **not** create a public github issue.
+
+## Automated Tools
+
+The use of AI tooling for assisted development work is accepted and encouraged
+in this repository, but due to the volume of submissions we ask that you observe
+the following rules:
+
+- All issue and pull request submissions to this repository that are sourced by
+  AI must first be reviewed by a human before submitting to the repository.
+  Items reviewed in this way must include a statement like "generated by AI
+  tools, and reviewed by [person]"
+- Please ensure that your submissions are actually improvements. While we are
+  grateful for any proposed fixes, even if they are very small, behavior that
+  looks like creating noisy PRs or artificially inflating submission counts
+  is not acceptable.
+- We may close issues or pull requests, or limit your ability to interact with
+  this repository, for behavior that in our estimation violates these rules or
+  any of the other rules in this repository's
+  [Code of Conduct](CODE_OF_CONDUCT.md).
 
 ## Licensing
 
-See the [LICENSE](https://github.com/aws-actions/configure-aws-credentials/blob/main/LICENSE) file for our project's licensing. We will ask you to confirm the licensing of your contribution.
+See the
+[LICENSE](https://github.com/aws-actions/configure-aws-credentials/blob/main/LICENSE)
+file for our project's licensing. We will ask you to confirm the licensing of
+your contribution.
 
-We may ask you to sign a [Contributor License Agreement (CLA)](http://en.wikipedia.org/wiki/Contributor_License_Agreement) for larger changes.
+We may ask you to sign a
+[Contributor License Agreement (CLA)](http://en.wikipedia.org/wiki/Contributor_License_Agreement)
+for larger changes.

__mocks__/fs.cjs

@@ -1,2 +1,2 @@
-const { fs } = require('memfs')
-module.exports = fs
+const { fs } = require('memfs');
+module.exports = fs;

action.yml

@@ -2,9 +2,10 @@
 name: '"Configure AWS Credentials" Action for GitHub Actions'
 description: Configures AWS credentials for use in subsequent steps in a GitHub Action workflow
 runs:
-  using: node20
+  using: node24
   main: dist/index.js
   post: dist/cleanup/index.js
+  post-if: env.AWS_SKIP_CLEANUP_STEP != 'true'
 branding:
   color: orange
   icon: cloud
@@ -12,6 +13,12 @@ inputs:
   aws-region:
     description: AWS Region, e.g. us-east-2
     required: true
+  aws-profile:
+    description: Name of the AWS profile to configure. When provided, credentials are written to ~/.aws/credentials and ~/.aws/config files instead of env variables (unless output-env-credentials is manually set to true). Name cannot contain whitespace, square brackets, or slashes.
+    required: false
+  overwrite-aws-profile:
+    description: Overwrite the given AWS profile if it already exists. Requires aws-profile. When set to false or not set, an error will be thrown if the profile already exists.
+    required: false
   role-to-assume:
     description: The Amazon Resource Name (ARN) of the role to assume. Use the provided credentials to assume an IAM role and configure the Actions environment with the assumed role credentials rather than with the provided credentials.
     required: false
@@ -37,6 +44,9 @@ inputs:
   http-proxy:
     description: Proxy to use for the AWS SDK agent
     required: false
+  no-proxy:
+    description: Hosts to skip for the proxy configuration
+    required: false
   mask-aws-account-id:
     description: Whether to mask the AWS account ID for these credentials as a secret value. By default the account ID will not be masked
     required: false
@@ -52,6 +62,9 @@ inputs:
   role-skip-session-tagging:
     description: Skip session tagging during role assumption
     required: false
+  transitive-tag-keys:
+    description: Define a list of transitive tag keys to pass when assuming a role
+    required: false
   inline-session-policy:
     description: Define an inline session policy to use when assuming a role
     required: false
@@ -61,6 +74,9 @@ inputs:
   output-credentials:
     description: Whether to set credentials as step output
     required: false
+  output-env-credentials:
+    description: Whether to export credentials as environment variables. If you set this to false, you probably want to use output-credentials.
+    required: false
   unset-current-credentials:
     description: Whether to unset the existing credentials in your runner. May be useful if you run this action multiple times in the same job
     required: false
@@ -74,7 +90,18 @@ inputs:
     description: Some environments do not support special characters in AWS_SECRET_ACCESS_KEY. This option will retry fetching credentials until the secret access key does not contain special characters. This option overrides disable-retry and retry-max-attempts. This option is disabled by default
     required: false
   use-existing-credentials:
+    required: false
     description: When enabled, this option will check if there are already valid credentials in the environment. If there are, new credentials will not be fetched. If there are not, the action will run as normal.
+  allowed-account-ids:
+    required: false
+    description: An option comma-delimited list of expected AWS account IDs. The action will fail if we receive credentials for the wrong account.
+  force-skip-oidc:
+    required: false
+    description: When enabled, this option will skip using GitHub OIDC provider even if the id-token permission is set. This is sometimes useful when using IAM instance credentials.
+  action-timeout-s:
+    required: false
+    description: A global timeout in seconds for the action. When the timeout is reached, the action immediately exits. The default is to run without a timeout.
+
 outputs:
   aws-account-id:
     description: The AWS account ID for the provided credentials
@@ -84,3 +111,5 @@ outputs:
     description: The AWS secret access key for the provided credentials
   aws-session-token:
     description: The AWS session token for the provided credentials
+  aws-expiration:
+    description: The expiration time for the provided credentials

biome.jsonc

@@ -4,18 +4,22 @@
     "lineWidth": 120,
     "indentWidth": 2,
     "lineEnding": "lf",
-    "enabled": true,
+    "enabled": true
   },
   "linter": {
     "enabled": true,
     "rules": {
       "performance": {
-        "noDelete": "off",
+        "noDelete": "off"
+      },
+      "correctness": {
+        // Specifying a radix disables interpretation of 0x as a number (needed for backwards compat)
+        "useParseIntRadix": "off"
       },
       "complexity": {
-        "noExtraBooleanCast": "off",
+        "noExtraBooleanCast": "off"
       }
-    },
+    }
   },
   "javascript": {
     "formatter": {
@@ -23,12 +27,12 @@
       "jsxQuoteStyle": "double",
       "quoteStyle": "single",
       "bracketSpacing": true,
-      "arrowParentheses": "always",
-    },
+      "arrowParentheses": "always"
+    }
   },
   "json": {
     "formatter": {
-      "trailingCommas": "all",
-    },
-  },
+      "trailingCommas": "none"
+    }
+  }
 }

examples/README.md

@@ -2,8 +2,13 @@
 
 ## [federated-setup](./federated-setup/README.md)
 
-The directory contains templates for setting up the `configure-aws-credentials` federation between your GitHub Organization/repository and your AWS account.
+The directory contains templates for setting up the `configure-aws-credentials`
+federation between your GitHub Organization/repository and your AWS account.
 
 ## [cfn-deploy-example](./cfn-deploy-example/README.md)
 
-Repository example uses aws-action `configure-aws-credentials` with OIDC federation template [github-actions-oidc-federation-and-role](./github-actions-oidc-federation-and-role.yml). Example demonstrates a repository that deploys AWS CloudFormation template using cfn-deploy GitHub Action.
+Repository example uses aws-action `configure-aws-credentials` with OIDC
+federation template
+[github-actions-oidc-federation-and-role](./github-actions-oidc-federation-and-role.yml).
+Example demonstrates a repository that deploys AWS CloudFormation template using
+cfn-deploy GitHub Action.

examples/cfn-deploy-example/.github/workflows/compliance.yml

@@ -6,7 +6,7 @@ jobs:
   sast-guard:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - uses: grolston/guard-action@main
       with:
         data_directory: './cloudformation/' ## change to your template directory

examples/cfn-deploy-example/.github/workflows/deploy.yml

@@ -18,9 +18,9 @@ jobs:
       contents: read
     steps:
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
     - name: Configure AWS Credentials
-      uses: aws-actions/configure-aws-credentials@v4
+      uses: aws-actions/configure-aws-credentials@v6
       with:
         aws-region: us-east-1
         ## the following creates an ARN based on the values entered into github secrets

examples/cfn-deploy-example/README.md

@@ -1,14 +1,24 @@
 # cfn-deploy example
 
-Example uses aws-action `configure-aws-credentials` with OIDC federation. Prior to using this example project, the user needs to deploy the [github-actions-oidc-federation-and-role](../federated-setup/github-actions-oidc-federation-and-role.yml) template in the AWS account they want to deploy the CloudFormation template into. Specify the GitHub Organization name, repository name, and the specific branch you want to deploy on.
+Example uses aws-action `configure-aws-credentials` with OIDC federation. Prior
+to using this example project, the user needs to deploy the
+[github-actions-oidc-federation-and-role](../federated-setup/github-actions-oidc-federation-and-role.yml)
+template in the AWS account they want to deploy the CloudFormation template
+into. Specify the GitHub Organization name, repository name, and the specific
+branch you want to deploy on.
 
-Within the [github/workflows](./.github/workflows/) directory there is a [compliance.yml](./.github/workflows/compliance.yml) and a [deploy.yml](./.github/workflows/deploy.yml). The deploy.yml file leverages the aws-action `configure-aws-credentials` and accesses GitHub Action Secrets for some of the variables. The compliance.yml runs static application security testing using cfn-guard.
+Within the [github/workflows](./.github/workflows/) directory there is a
+[compliance.yml](./.github/workflows/compliance.yml) and a
+[deploy.yml](./.github/workflows/deploy.yml). The deploy.yml file leverages the
+aws-action `configure-aws-credentials` and accesses GitHub Action Secrets for
+some of the variables. The compliance.yml runs static application security
+testing using cfn-guard.
 
 To use the example you will need to set the following GitHub Action Secrets:
 
-| Secret Key | Used With | Description |
-| --------- | -------- | -----------|
-| AWS_ACCOUNT_ID | configure-aws-credentials | The AWS account ID |
-| AWS_DEPLOY_ROLE | configure-aws-credentials | The name of the IAM role |
-| VPC_ID | aws-cloudformation-github-deploy | VPC ID the EC2 Bastion is deployed to |
-| SUBNET_ID | aws-cloudformation-github-deploy | Subnet ID the EC2 Bastion is deployed to |
+| Secret Key      | Used With                        | Description                              |
+| --------------- | -------------------------------- | ---------------------------------------- |
+| AWS_ACCOUNT_ID  | configure-aws-credentials        | The AWS account ID                       |
+| AWS_DEPLOY_ROLE | configure-aws-credentials        | The name of the IAM role                 |
+| VPC_ID          | aws-cloudformation-github-deploy | VPC ID the EC2 Bastion is deployed to    |
+| SUBNET_ID       | aws-cloudformation-github-deploy | Subnet ID the EC2 Bastion is deployed to |

examples/federated-setup/README.md

@@ -2,8 +2,10 @@
 
 ## [github-action-oidc-federation](./github-actions-oidc-federation.yml)
 
-Setup of the OIDC federation between your GitHub Organization/repository and your AWS account.
+Setup of the OIDC federation between your GitHub Organization/repository and
+your AWS account.
 
 ## [github-actions-oidc-federation-and-role](./github-actions-oidc-federation-and-role.yml)
 
-Setup of the OIDC federation between your GitHub Organization/repository and your AWS account along with a role that only executes on specific branch.
+Setup of the OIDC federation between your GitHub Organization/repository and
+your AWS account along with a role that only executes on specific branch.

jest.config.cjs

@@ -1,31 +0,0 @@
-/** @type {import('jest').Config} */
-const config = {
-  verbose: true,
-  transform: {
-    '^.+\\.m?[tj]sx?$': ['ts-jest'],
-  },
-  testMatch: [
-    '<rootDir>/src/**/__tests__/**/*.ts?(x)',
-    '<rootDir>/(test|src)/**/*(*.)@(spec|test).ts?(x)',
-    '<rootDir>/test/**/*.(test|spec).(js|jsx|ts|tsx)',
-  ],
-  clearMocks: true,
-  collectCoverage: true,
-  coverageReporters: ['json', 'lcov', 'clover', 'cobertura', 'text'],
-  coverageDirectory: 'coverage',
-  coveragePathIgnorePatterns: ['/node_modules/'],
-  testPathIgnorePatterns: ['/node_modules/'],
-  watchPathIgnorePatterns: ['/node_modules/'],
-  reporters: [
-    'default',
-    [
-      'jest-junit',
-      {
-        outputDirectory: 'test-reports',
-      },
-    ],
-  ],
-  preset: 'ts-jest/presets/default-legacy',
-};
-
-module.exports = config;

package.json

@@ -1,12 +1,15 @@
 {
   "name": "configure-aws-credentials",
   "description": "A GitHub Action to configure AWS credentials",
-  "version": "4.2.1",
+  "version": "6.1.0",
   "scripts": {
     "build": "tsc",
-    "lint": "biome check --error-on-warnings ./src",
-    "package": "npm run build && ncc build --license THIRD-PARTY -o dist && ncc build src/cleanup/index.ts -o dist/cleanup && cpy dist/THIRD-PARTY . && del-cli dist/THIRD-PARTY",
-    "test": "npm run lint && vitest run && npm run build"
+    "lint": "biome check --error-on-warnings ./src && markdownlint -i node_modules -i CHANGELOG.md '**/*.md'",
+    "lint:fix": "biome check --write ./src && markdownlint -i node_modules -i CHANGELOG.md -f '**/*.md'",
+    "package": "esbuild src/index.ts --bundle --platform=node --target=node24 --outfile=dist/index.js && esbuild src/cleanup/index.ts --bundle --platform=node --target=node24 --outfile=dist/cleanup/index.js && npm run license",
+    "test": "npm run lint && vitest run && npm run build",
+    "clean": "del-cli coverage test-reports node_modules",
+    "license": "generate-license-file --config ./.generatelicensefile.json"
   },
   "author": {
     "name": "Amazon.com, Inc. or its affiliates",
@@ -14,26 +17,26 @@
     "organization": true
   },
   "devDependencies": {
-    "@aws-sdk/credential-provider-env": "^3.808.0",
-    "@biomejs/biome": "1.9.4",
-    "@smithy/property-provider": "^4.0.1",
-    "@types/node": "^22.15.17",
-    "@vercel/ncc": "^0.38.3",
-    "@vitest/coverage-v8": "^3.1.2",
+    "@aws-sdk/credential-provider-env": "^3.972.24",
+    "@biomejs/biome": "2.4.10",
+    "@smithy/property-provider": "^4.2.11",
+    "@types/node": "^25.5.0",
+    "@vitest/coverage-v8": "^3.2.4",
     "aws-sdk-client-mock": "^4.1.0",
-    "cpy-cli": "^5.0.0",
-    "del-cli": "^6.0.0",
+    "esbuild": "^0.27.4",
+    "generate-license-file": "^4.1.1",
     "json-schema": "^0.4.0",
-    "memfs": "^4.17.1",
+    "markdownlint-cli": "^0.48.0",
+    "memfs": "^4.57.1",
     "standard-version": "^9.5.0",
-    "typescript": "^5.8.3",
-    "vitest": "^3.1.2"
+    "typescript": "^6.0.2",
+    "vitest": "^3.2.4"
   },
   "dependencies": {
-    "@actions/core": "^1.11.1",
-    "@aws-sdk/client-sts": "^3.808.0",
-    "@smithy/node-http-handler": "^4.0.1",
-    "https-proxy-agent": "^5.0.1"
+    "@actions/core": "^2.0.2",
+    "@aws-sdk/client-sts": "^3.1020.0",
+    "@smithy/node-http-handler": "^4.4.7",
+    "proxy-agent": "^8.0.0"
   },
   "keywords": [
     "aws",
@@ -41,7 +44,7 @@
     "github-action"
   ],
   "engines": {
-    "node": ">= 14.0.0"
+    "node": ">= 16.3.0"
   },
   "main": "build/index.js",
   "license": "MIT",

release-please-config.json

@@ -6,7 +6,8 @@
       "bump-minor-pre-major": false,
       "bump-patch-for-minor-pre-major": false,
       "draft": false,
-      "prerelease": false
+      "prerelease": false,
+      "exclude-paths": [".github", "dist"]
     }
   },
   "$schema": "https://raw.githubusercontent.com/googleapis/release-please/main/schemas/config.json"

src/CredentialsClient.ts

@@ -2,45 +2,67 @@ import { info } from '@actions/core';
 import { STSClient } from '@aws-sdk/client-sts';
 import type { AwsCredentialIdentity } from '@aws-sdk/types';
 import { NodeHttpHandler } from '@smithy/node-http-handler';
-import { HttpsProxyAgent } from 'https-proxy-agent';
-import { errorMessage } from './helpers';
+import { ProxyAgent } from 'proxy-agent';
+import { errorMessage, getCallerIdentity } from './helpers';
+import { ProxyResolver } from './ProxyResolver';
 
 const USER_AGENT = 'configure-aws-credentials-for-github-actions';
 
 export interface CredentialsClientProps {
   region?: string;
   proxyServer?: string;
+  noProxy?: string;
+  roleChaining: boolean;
 }
 
 export class CredentialsClient {
   public region?: string;
   private _stsClient?: STSClient;
   private readonly requestHandler?: NodeHttpHandler;
+  private roleChaining?: boolean;
 
   constructor(props: CredentialsClientProps) {
-    this.region = props.region;
+    if (props.region !== undefined) {
+      this.region = props.region;
+    }
     if (props.proxyServer) {
       info('Configuring proxy handler for STS client');
-      const handler = new HttpsProxyAgent(props.proxyServer);
+      const proxyOptions: { httpProxy: string; httpsProxy: string; noProxy?: string } = {
+        httpProxy: props.proxyServer,
+        httpsProxy: props.proxyServer,
+      };
+      if (props.noProxy !== undefined) {
+        proxyOptions.noProxy = props.noProxy;
+      }
+      const getProxyForUrl = new ProxyResolver(proxyOptions).getProxyForUrl;
+      const handler = new ProxyAgent({ getProxyForUrl });
       this.requestHandler = new NodeHttpHandler({
-        httpAgent: handler,
         httpsAgent: handler,
+        httpAgent: handler,
       });
     }
+    this.roleChaining = props.roleChaining;
   }
 
   public get stsClient(): STSClient {
-    if (!this._stsClient) {
-      this._stsClient = new STSClient({
-        region: this.region,
-        customUserAgent: USER_AGENT,
-        requestHandler: this.requestHandler ? this.requestHandler : undefined,
-      });
+    if (!this._stsClient || this.roleChaining) {
+      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;
   }
 
-  public async validateCredentials(expectedAccessKeyId?: string, roleChaining?: boolean) {
+  public async validateCredentials(
+    expectedAccessKeyId?: string,
+    roleChaining?: boolean,
+    expectedAccountIds?: string[],
+  ) {
     let credentials: AwsCredentialIdentity;
     try {
       credentials = await this.loadCredentials();
@@ -50,22 +72,36 @@ export class CredentialsClient {
     } catch (error) {
       throw new Error(`Credentials could not be loaded, please check your action inputs: ${errorMessage(error)}`);
     }
+    if (expectedAccountIds && expectedAccountIds.length > 0 && expectedAccountIds[0] !== '') {
+      let callerIdentity: Awaited<ReturnType<typeof getCallerIdentity>>;
+      try {
+        callerIdentity = await getCallerIdentity(this.stsClient);
+      } catch (error) {
+        throw new Error(`Could not validate account ID of credentials: ${errorMessage(error)}`);
+      }
+      if (!callerIdentity.Account || !expectedAccountIds.includes(callerIdentity.Account)) {
+        throw new Error(
+          `The account ID of the provided credentials (${
+            callerIdentity.Account ?? 'unknown'
+          }) does not match any of the expected account IDs: ${expectedAccountIds.join(', ')}`,
+        );
+      }
+    }
 
     if (!roleChaining) {
       const actualAccessKeyId = credentials.accessKeyId;
-
       if (expectedAccessKeyId && expectedAccessKeyId !== actualAccessKeyId) {
         throw new Error(
-          'Unexpected failure: Credentials loaded by the SDK do not match the access key ID configured by the action',
+          'Credentials loaded by the SDK do not match the expected access key ID configured by the action',
         );
       }
     }
   }
 
   private async loadCredentials() {
-    const client = new STSClient({
-      requestHandler: this.requestHandler ? this.requestHandler : undefined,
-    });
+    const config = {} as { requestHandler?: NodeHttpHandler };
+    if (this.requestHandler !== undefined) config.requestHandler = this.requestHandler;
+    const client = new STSClient(config);
     return client.config.credentials();
   }
 }

src/ProxyResolver.ts

@@ -0,0 +1,71 @@
+// Based on https://github.com/Rob--W/proxy-from-env/tree/caf8c32301afdac8b5feaf346028bd8240690144
+// See https://github.com/Rob--W/proxy-from-env/blob/caf8c32301afdac8b5feaf346028bd8240690144/LICENSE
+import type * as http from 'node:http';
+
+const DEFAULT_PORTS: Record<string, number> = {
+  http: 80,
+  https: 443,
+};
+export interface ProxyOptions {
+  readonly noProxy?: string;
+  readonly httpsProxy?: string;
+  readonly httpProxy?: string;
+}
+
+export class ProxyResolver {
+  options: ProxyOptions;
+  constructor(options: ProxyOptions) {
+    this.options = options;
+  }
+
+  // This method matches the interface expected by 'proxy-agent'. It is an arrow function to bind 'this'.
+  public readonly getProxyForUrl = (url: string, _req: http.ClientRequest): string => {
+    return this.getProxyForUrlOptions(url, this.options);
+  };
+
+  private getProxyForUrlOptions(url: string | URL, options?: ProxyOptions): string {
+    let parsedUrl: URL;
+    try {
+      parsedUrl = typeof url === 'string' ? new URL(url) : url;
+    } catch (_) {
+      return ''; // Don't proxy invalid URLs.
+    }
+    const proto = parsedUrl.protocol.split(':', 1)[0];
+    if (!proto) return ''; // Don't proxy URLs without a protocol.
+    const hostname = parsedUrl.host;
+    const port = parseInt(parsedUrl.port || '') || DEFAULT_PORTS[proto] || 0;
+
+    if (options?.noProxy && !this.shouldProxy(hostname, port, options.noProxy)) return '';
+    if (proto === 'http' && options?.httpProxy) return options.httpProxy;
+    if (proto === 'https' && options?.httpsProxy) return options.httpsProxy;
+    return ''; // No proxy configured for this protocol or unknown protocol
+  }
+
+  private shouldProxy(hostname: string, port: number, noProxy: string): boolean {
+    if (!noProxy) return true;
+    if (noProxy === '*') return false; // Never proxy if wildcard is set.
+
+    return noProxy.split(/[,\s]/).every((proxy) => {
+      if (!proxy) return true; // Skip zero-length hosts.
+
+      const parsedProxy = proxy.match(/^(.+):(\d+)$/);
+      const parsedProxyHostname = parsedProxy ? parsedProxy[1] : proxy;
+      const parsedProxyPort = parsedProxy?.[2] ? parseInt(parsedProxy[2]) : 0;
+
+      if (parsedProxyPort && parsedProxyPort !== port) return true; // Skip if ports don't match.
+
+      if (parsedProxyHostname && !/^[.*]/.test(parsedProxyHostname)) {
+        // No wildcards, so stop proxying if there is an exact match.
+        return hostname !== parsedProxyHostname;
+      }
+
+      let cleanProxyHostname = parsedProxyHostname;
+      if (parsedProxyHostname && parsedProxyHostname.charAt(0) === '*') {
+        // Remove leading wildcard.
+        cleanProxyHostname = parsedProxyHostname.slice(1);
+      }
+      // Stop proxying if the hostname ends with the no_proxy host.
+      return !cleanProxyHostname || !hostname.endsWith(cleanProxyHostname);
+    });
+  }
+}

src/assumeRole.ts

@@ -9,6 +9,7 @@ import { errorMessage, isDefined, sanitizeGitHubVariables } from './helpers';
 
 async function assumeRoleWithOIDC(params: AssumeRoleCommandInput, client: STSClient, webIdentityToken: string) {
   delete params.Tags;
+  delete params.TransitiveTagKeys;
   core.info('Assuming role with OIDC');
   try {
     const creds = await client.send(
@@ -70,6 +71,7 @@ export interface assumeRoleParams {
   roleDuration: number;
   roleSessionName: string;
   roleSkipSessionTagging?: boolean;
+  transitiveTagKeys?: string[];
   sourceAccountId?: string;
   roleExternalId?: string;
   webIdentityTokenFile?: string;
@@ -87,6 +89,7 @@ export async function assumeRole(params: assumeRoleParams) {
     roleDuration,
     roleSessionName,
     roleSkipSessionTagging,
+    transitiveTagKeys,
     webIdentityTokenFile,
     webIdentityToken,
     inlineSessionPolicy,
@@ -121,6 +124,11 @@ export async function assumeRole(params: assumeRoleParams) {
     core.debug(`${tags.length} role session tags are being used.`);
   }
 
+  //only populate transitiveTagKeys array if user is actually using session tagging
+  const transitiveTagKeysArray = roleSkipSessionTagging
+    ? undefined
+    : transitiveTagKeys?.filter((key) => tags?.some((tag) => tag.Key === key));
+
   // Calculate role ARN from name and account ID (currently only supports `aws` partition)
   let roleArn = roleToAssume;
   if (!roleArn.startsWith('arn:aws')) {
@@ -137,13 +145,17 @@ export async function assumeRole(params: assumeRoleParams) {
     RoleSessionName: roleSessionName,
     DurationSeconds: roleDuration,
     Tags: tags ? tags : undefined,
+    TransitiveTagKeys: transitiveTagKeysArray ? transitiveTagKeysArray : undefined,
     ExternalId: roleExternalId ? roleExternalId : undefined,
     Policy: inlineSessionPolicy ? inlineSessionPolicy : undefined,
     PolicyArns: managedSessionPolicies?.length ? managedSessionPolicies : undefined,
   };
   const keys = Object.keys(commonAssumeRoleParams) as Array<keyof typeof commonAssumeRoleParams>;
-  // biome-ignore lint/complexity/noForEach: Legacy code
-  keys.forEach((k) => commonAssumeRoleParams[k] === undefined && delete commonAssumeRoleParams[k]);
+  keys.forEach((k) => {
+    if (commonAssumeRoleParams[k] === undefined) {
+      delete commonAssumeRoleParams[k];
+    }
+  });
 
   // Instantiate STS client
   const stsClient = credentialsClient.stsClient;

src/cleanup/index.ts

@@ -1,5 +1,5 @@
 import * as core from '@actions/core';
-import { errorMessage } from '../helpers';
+import { errorMessage, getBooleanInput } from '../helpers';
 
 /**
  * When the GitHub Actions job is done, clean up any environment variables that
@@ -13,20 +13,28 @@ import { errorMessage } from '../helpers';
  */
 
 export function cleanup() {
-  try {
-    // The GitHub Actions toolkit does not have an option to completely unset
-    // environment variables, so we overwrite the current value with an empty
-    // string. The AWS CLI and AWS SDKs will behave correctly: they treat an
-    // empty string value as if the environment variable does not exist.
-    core.exportVariable('AWS_ACCESS_KEY_ID', '');
-    core.exportVariable('AWS_SECRET_ACCESS_KEY', '');
-    core.exportVariable('AWS_SESSION_TOKEN', '');
-    core.exportVariable('AWS_DEFAULT_REGION', '');
-    core.exportVariable('AWS_REGION', '');
-  } catch (error) {
-    core.setFailed(errorMessage(error));
+  // Only attempt to change environment variables if we changed them in the first place
+  const awsProfile = core.getInput('aws-profile', { required: false });
+  if (getBooleanInput('output-env-credentials', { required: false, default: !awsProfile })) {
+    try {
+      // The GitHub Actions toolkit does not have an option to completely unset
+      // environment variables, so we overwrite the current value with an empty
+      // string. The AWS CLI and AWS SDKs will behave correctly: they treat an
+      // empty string value as if the environment variable does not exist.
+      core.exportVariable('AWS_ACCESS_KEY_ID', '');
+      core.exportVariable('AWS_SECRET_ACCESS_KEY', '');
+      core.exportVariable('AWS_SESSION_TOKEN', '');
+      core.exportVariable('AWS_DEFAULT_REGION', '');
+      core.exportVariable('AWS_REGION', '');
+      if (core.getInput('aws-profile')) {
+        core.exportVariable('AWS_PROFILE', '');
+      }
+    } catch (error) {
+      core.setFailed(errorMessage(error));
+    }
   }
 }
+
 /* c8 ignore start */
 if (require.main === module) {
   try {

src/helpers.ts

@@ -1,5 +1,5 @@
 import * as core from '@actions/core';
-import type { Credentials } from '@aws-sdk/client-sts';
+import type { Credentials, STSClient } from '@aws-sdk/client-sts';
 import { GetCallerIdentityCommand } from '@aws-sdk/client-sts';
 import type { CredentialsClient } from './CredentialsClient';
 
@@ -20,6 +20,7 @@ export function translateEnvVariables() {
     'ROLE_EXTERNAL_ID',
     'ROLE_SESSION_NAME',
     'ROLE_SKIP_SESSION_TAGGING',
+    'TRANSITIVE_TAG_KEYS',
     'INLINE_SESSION_POLICY',
     'MANAGED_SESSION_POLICIES',
     'OUTPUT_CREDENTIALS',
@@ -28,7 +29,12 @@ export function translateEnvVariables() {
     'RETRY_MAX_ATTEMPTS',
     'SPECIAL_CHARACTERS_WORKAROUND',
     'USE_EXISTING_CREDENTIALS',
+    'NO_PROXY',
+    'OVERWRITE_AWS_PROFILE',
   ];
+  // Treat HTTPS_PROXY as HTTP_PROXY. Precedence is HTTPS_PROXY > HTTP_PROXY
+  if (process.env.HTTPS_PROXY) process.env.HTTP_PROXY = process.env.HTTPS_PROXY;
+
   for (const envVar of envVars) {
     if (process.env[envVar]) {
       const inputKey = `INPUT_${envVar.replace(/_/g, '-')}`;
@@ -39,23 +45,38 @@ export function translateEnvVariables() {
 
 // Configure the AWS CLI and AWS SDKs using environment variables and set them as secrets.
 // Setting the credentials as secrets masks them in Github Actions logs
-export function exportCredentials(creds?: Partial<Credentials>, outputCredentials?: boolean) {
+export function exportCredentials(
+  creds?: Partial<Credentials>,
+  outputCredentials?: boolean,
+  outputEnvCredentials?: boolean,
+) {
   if (creds?.AccessKeyId) {
     core.setSecret(creds.AccessKeyId);
-    core.exportVariable('AWS_ACCESS_KEY_ID', creds.AccessKeyId);
   }
 
   if (creds?.SecretAccessKey) {
     core.setSecret(creds.SecretAccessKey);
-    core.exportVariable('AWS_SECRET_ACCESS_KEY', creds.SecretAccessKey);
   }
 
   if (creds?.SessionToken) {
     core.setSecret(creds.SessionToken);
-    core.exportVariable('AWS_SESSION_TOKEN', creds.SessionToken);
-  } else if (process.env.AWS_SESSION_TOKEN) {
-    // clear session token from previous credentials action
-    core.exportVariable('AWS_SESSION_TOKEN', '');
+  }
+
+  if (outputEnvCredentials) {
+    if (creds?.AccessKeyId) {
+      core.exportVariable('AWS_ACCESS_KEY_ID', creds.AccessKeyId);
+    }
+
+    if (creds?.SecretAccessKey) {
+      core.exportVariable('AWS_SECRET_ACCESS_KEY', creds.SecretAccessKey);
+    }
+
+    if (creds?.SessionToken) {
+      core.exportVariable('AWS_SESSION_TOKEN', creds.SessionToken);
+    } else if (process.env.AWS_SESSION_TOKEN) {
+      // clear session token from previous credentials action
+      core.exportVariable('AWS_SESSION_TOKEN', '');
+    }
   }
 
   if (outputCredentials) {
@@ -74,31 +95,49 @@ export function exportCredentials(creds?: Partial<Credentials>, outputCredential
   }
 }
 
-export function unsetCredentials() {
-  core.exportVariable('AWS_ACCESS_KEY_ID', '');
-  core.exportVariable('AWS_SECRET_ACCESS_KEY', '');
-  core.exportVariable('AWS_SESSION_TOKEN', '');
-  core.exportVariable('AWS_REGION', '');
-  core.exportVariable('AWS_DEFAULT_REGION', '');
+export function unsetCredentials(outputEnvCredentials?: boolean) {
+  if (outputEnvCredentials) {
+    core.exportVariable('AWS_ACCESS_KEY_ID', '');
+    core.exportVariable('AWS_SECRET_ACCESS_KEY', '');
+    core.exportVariable('AWS_SESSION_TOKEN', '');
+    core.exportVariable('AWS_REGION', '');
+    core.exportVariable('AWS_DEFAULT_REGION', '');
+  }
 }
 
-export function exportRegion(region: string) {
-  core.exportVariable('AWS_DEFAULT_REGION', region);
-  core.exportVariable('AWS_REGION', region);
+export function exportRegion(region: string, outputEnvCredentials?: boolean) {
+  if (outputEnvCredentials) {
+    core.exportVariable('AWS_DEFAULT_REGION', region);
+    core.exportVariable('AWS_REGION', region);
+  }
+}
+
+export async function getCallerIdentity(client: STSClient): Promise<{ Account: string; Arn: string; UserId?: string }> {
+  const identity = await client.send(new GetCallerIdentityCommand({}));
+  if (!identity.Account || !identity.Arn) {
+    throw new Error('Could not get Account ID or ARN from STS. Did you set credentials?');
+  }
+  const result: { Account: string; Arn: string; UserId?: string } = {
+    Account: identity.Account,
+    Arn: identity.Arn,
+  };
+  if (identity.UserId !== undefined) {
+    result.UserId = identity.UserId;
+  }
+  return result;
 }
 
 // Obtains account ID from STS Client and sets it as output
 export async function exportAccountId(credentialsClient: CredentialsClient, maskAccountId?: boolean) {
-  const client = credentialsClient.stsClient;
-  const identity = await client.send(new GetCallerIdentityCommand({}));
+  const identity = await getCallerIdentity(credentialsClient.stsClient);
   const accountId = identity.Account;
-  if (!accountId) {
-    throw new Error('Could not get Account ID from STS. Did you set credentials?');
-  }
+  const arn = identity.Arn;
   if (maskAccountId) {
     core.setSecret(accountId);
+    core.setSecret(arn);
   }
   core.setOutput('aws-account-id', accountId);
+  core.setOutput('authenticated-arn', arn);
   return accountId;
 }
 
@@ -155,16 +194,26 @@ export async function retryAndBackoff<T>(
     return await fn();
   } catch (err) {
     if (!isRetryable) {
+      core.debug(`retryAndBackoff: error is not retryable: ${errorMessage(err)}`);
       throw err;
     }
     // It's retryable, so sleep and retry.
-    await sleep(Math.random() * (2 ** retries * base));
-    // biome-ignore lint/style/noParameterAssign: This is a loop variable
-    retries += 1;
-    if (retries >= maxRetries) {
+    const delay = Math.random() * (2 ** retries * base);
+    const nextRetry = retries + 1;
+
+    core.debug(
+      `retryAndBackoff: attempt ${nextRetry} of ${maxRetries} failed: ${errorMessage(err)}. ` +
+        `Retrying after ${Math.floor(delay)}ms.`,
+    );
+
+    await sleep(delay);
+
+    if (nextRetry >= maxRetries) {
+      core.debug('retryAndBackoff: reached max retries; giving up.');
       throw err;
     }
-    return await retryAndBackoff(fn, isRetryable, maxRetries, retries, base);
+
+    return await retryAndBackoff(fn, isRetryable, maxRetries, nextRetry, base);
   }
 }
 
@@ -190,3 +239,32 @@ export async function areCredentialsValid(credentialsClient: CredentialsClient)
     return false;
   }
 }
+
+/**
+ * Like core.getBooleanInput, but respects the required option.
+ *
+ * From https://github.com/actions/toolkit/blob/6876e2a664ec02908178087905b9155e9892a437/packages/core/src/core.ts
+ *
+ * Gets the input value of the boolean type in the YAML 1.2 "core schema" specification.
+ * Support boolean input list: `true | True | TRUE | false | False | FALSE` .
+ * The return value is also in boolean type.
+ * ref: https://yaml.org/spec/1.2/spec.html#id2804923
+ *
+ * @param     name     name of the input to get
+ * @param     options  optional. See core.InputOptions. Also supports optional 'default' if the input is not set
+ * @returns   boolean
+ */
+export function getBooleanInput(name: string, options?: core.InputOptions & { default?: boolean }): boolean {
+  const trueValue = ['true', 'True', 'TRUE'];
+  const falseValue = ['false', 'False', 'FALSE'];
+  const optionsWithoutDefault = { ...options };
+  delete optionsWithoutDefault.default;
+  const val = core.getInput(name, optionsWithoutDefault);
+  if (trueValue.includes(val)) return true;
+  if (falseValue.includes(val)) return false;
+  if (val === '') return options?.default ?? false;
+  throw new TypeError(
+    `Input does not meet YAML 1.2 "Core Schema" specification: ${name}\n` +
+      `Support boolean input list: \`true | True | TRUE | false | False | FALSE\``,
+  );
+}

src/index.ts

@@ -1,18 +1,20 @@
 import * as core from '@actions/core';
 import type { AssumeRoleCommandOutput } from '@aws-sdk/client-sts';
-import { CredentialsClient } from './CredentialsClient';
 import { assumeRole } from './assumeRole';
+import { CredentialsClient } from './CredentialsClient';
 import {
   areCredentialsValid,
   errorMessage,
   exportAccountId,
   exportCredentials,
   exportRegion,
+  getBooleanInput,
   retryAndBackoff,
   translateEnvVariables,
   unsetCredentials,
   verifyKeys,
 } from './helpers';
+import { writeProfileFiles } from './profileManager';
 
 const DEFAULT_ROLE_DURATION = 3600; // One hour (seconds)
 const ROLE_SESSION_NAME = 'GitHubActions';
@@ -22,66 +24,73 @@ export async function run() {
   try {
     translateEnvVariables();
     // Get inputs
+    // Undefined inputs are empty strings ( or empty arrays)
     const AccessKeyId = core.getInput('aws-access-key-id', { required: false });
-    const SecretAccessKey = core.getInput('aws-secret-access-key', {
-      required: false,
-    });
-    const sessionTokenInput = core.getInput('aws-session-token', {
-      required: false,
-    });
+    const SecretAccessKey = core.getInput('aws-secret-access-key', { required: false });
+    const sessionTokenInput = core.getInput('aws-session-token', { required: false });
     const SessionToken = sessionTokenInput === '' ? undefined : sessionTokenInput;
     const region = core.getInput('aws-region', { required: true });
+    const awsProfile = core.getInput('aws-profile', { required: false });
+    const overwriteAwsProfile = getBooleanInput('overwrite-aws-profile', { required: false });
     const roleToAssume = core.getInput('role-to-assume', { required: false });
     const audience = core.getInput('audience', { required: false });
-    const maskAccountIdInput = core.getInput('mask-aws-account-id', { required: false }) || 'false';
-    const maskAccountId = maskAccountIdInput.toLowerCase() === 'true';
-    const roleExternalId = core.getInput('role-external-id', {
-      required: false,
-    });
-    const webIdentityTokenFile = core.getInput('web-identity-token-file', {
-      required: false,
-    });
+    const maskAccountId = getBooleanInput('mask-aws-account-id', { required: false });
+    const roleExternalId = core.getInput('role-external-id', { required: false });
+    const webIdentityTokenFile = core.getInput('web-identity-token-file', { required: false });
     const roleDuration =
       Number.parseInt(core.getInput('role-duration-seconds', { required: false })) || DEFAULT_ROLE_DURATION;
     const roleSessionName = core.getInput('role-session-name', { required: false }) || ROLE_SESSION_NAME;
-    const roleSkipSessionTaggingInput = core.getInput('role-skip-session-tagging', { required: false }) || 'false';
-    const roleSkipSessionTagging = roleSkipSessionTaggingInput.toLowerCase() === 'true';
-    const proxyServer = core.getInput('http-proxy', { required: false });
-    const inlineSessionPolicy = core.getInput('inline-session-policy', {
-      required: false,
+    const roleSkipSessionTagging = getBooleanInput('role-skip-session-tagging', { required: false });
+    const transitiveTagKeys = core.getMultilineInput('transitive-tag-keys', { required: false });
+    const proxyServer = core.getInput('http-proxy', { required: false }) || process.env.HTTP_PROXY;
+    const inlineSessionPolicy = core.getInput('inline-session-policy', { required: false });
+    const managedSessionPolicies = core.getMultilineInput('managed-session-policies', { required: false }).map((p) => {
+      return { arn: p };
     });
-    const managedSessionPoliciesInput = core.getMultilineInput('managed-session-policies', { required: false });
-    const managedSessionPolicies: { arn: string }[] = [];
-    const roleChainingInput = core.getInput('role-chaining', { required: false }) || 'false';
-    const roleChaining = roleChainingInput.toLowerCase() === 'true';
-    const outputCredentialsInput = core.getInput('output-credentials', { required: false }) || 'false';
-    const outputCredentials = outputCredentialsInput.toLowerCase() === 'true';
-    const unsetCurrentCredentialsInput = core.getInput('unset-current-credentials', { required: false }) || 'false';
-    const unsetCurrentCredentials = unsetCurrentCredentialsInput.toLowerCase() === 'true';
-    const disableRetryInput = core.getInput('disable-retry', { required: false }) || 'false';
-    let disableRetry = disableRetryInput.toLowerCase() === 'true';
-    const specialCharacterWorkaroundInput =
-      core.getInput('special-characters-workaround', { required: false }) || 'false';
-    const specialCharacterWorkaround = specialCharacterWorkaroundInput.toLowerCase() === 'true';
-    const useExistingCredentialsInput = core.getInput('use-existing-credentials', { required: false }) || 'false';
-    const useExistingCredentials = useExistingCredentialsInput.toLowerCase() === 'true';
+    const roleChaining = getBooleanInput('role-chaining', { required: false });
+    const outputCredentials = getBooleanInput('output-credentials', { required: false });
+    // Default to always outputting environment credentials unless profile is specified. If profile is specified, default to
+    // no environment credentials (but still output them if the user specifically requests it).
+    const outputEnvCredentials = getBooleanInput('output-env-credentials', { required: false, default: !awsProfile });
+    const unsetCurrentCredentials = getBooleanInput('unset-current-credentials', { required: false });
+    let disableRetry = getBooleanInput('disable-retry', { required: false });
+    const specialCharacterWorkaround = getBooleanInput('special-characters-workaround', { required: false });
+    const useExistingCredentials = core.getInput('use-existing-credentials', { required: false });
     let maxRetries = Number.parseInt(core.getInput('retry-max-attempts', { required: false })) || 12;
-    switch (true) {
-      case specialCharacterWorkaround:
-        // 😳
-        disableRetry = false;
-        maxRetries = 12;
-        break;
-      case maxRetries < 1:
-        maxRetries = 1;
-        break;
+    const expectedAccountIds = core
+      .getInput('allowed-account-ids', { required: false })
+      .split(',')
+      .map((s) => s.trim());
+    const forceSkipOidc = getBooleanInput('force-skip-oidc', { required: false });
+    const noProxy = core.getInput('no-proxy', { required: false });
+    const globalTimeout = Number.parseInt(core.getInput('action-timeout-s', { required: false })) || 0;
+
+    let timeoutId: NodeJS.Timeout | undefined;
+    if (globalTimeout > 0) {
+      core.info(`Setting a global timeout of ${globalTimeout} seconds for the action`);
+      timeoutId = setTimeout(() => {
+        core.setFailed(`Action timed out after ${globalTimeout} seconds`);
+        process.exit(1);
+      }, globalTimeout * 1000);
     }
-    for (const managedSessionPolicy of managedSessionPoliciesInput) {
-      managedSessionPolicies.push({ arn: managedSessionPolicy });
+
+    if (forceSkipOidc && roleToAssume && !AccessKeyId && !webIdentityTokenFile) {
+      throw new Error(
+        "If 'force-skip-oidc' is true and 'role-to-assume' is set, 'aws-access-key-id' or 'web-identity-token-file' must be set",
+      );
+    }
+
+    if (specialCharacterWorkaround) {
+      // 😳
+      disableRetry = false;
+      maxRetries = 12;
+    } else if (maxRetries < 1) {
+      maxRetries = 1;
     }
 
     // Logic to decide whether to attempt to use OIDC or not
     const useGitHubOIDCProvider = () => {
+      if (forceSkipOidc) return false;
       // The `ACTIONS_ID_TOKEN_REQUEST_TOKEN` environment variable is set when the `id-token` permission is granted.
       // This is necessary to authenticate with OIDC, but not strictly set just for OIDC. If it is not set and all other
       // checks pass, it is likely but not guaranteed that the user needs but lacks this permission in their workflow.
@@ -108,16 +117,23 @@ export async function run() {
     };
 
     if (unsetCurrentCredentials) {
-      unsetCredentials();
+      unsetCredentials(outputEnvCredentials);
     }
 
     if (!region.match(REGION_REGEX)) {
       throw new Error(`Region is not valid: ${region}`);
     }
-    exportRegion(region);
+
+    exportRegion(region, outputEnvCredentials);
 
     // Instantiate credentials client
-    const credentialsClient = new CredentialsClient({ region, proxyServer });
+    const clientProps: { region: string; proxyServer?: string; noProxy?: string; roleChaining: boolean } = {
+      region,
+      roleChaining,
+    };
+    if (proxyServer) clientProps.proxyServer = proxyServer;
+    if (noProxy) clientProps.noProxy = noProxy;
+    const credentialsClient = new CredentialsClient(clientProps);
     let sourceAccountId: string;
     let webIdentityToken: string;
 
@@ -126,6 +142,7 @@ export async function run() {
       const validCredentials = await areCredentialsValid(credentialsClient);
       if (validCredentials) {
         core.notice('Pre-existing credentials are valid. No need to generate new ones.');
+        if (timeoutId) clearTimeout(timeoutId);
         return;
       }
       core.notice('No valid credentials exist. Running as normal.');
@@ -153,10 +170,16 @@ export async function run() {
       // Plus, in the assume role case, if the AssumeRole call fails, we want
       // the source credentials to already be masked as secrets
       // in any error messages.
-      exportCredentials({ AccessKeyId, SecretAccessKey, SessionToken });
+      exportCredentials({ AccessKeyId, SecretAccessKey, SessionToken }, outputCredentials, outputEnvCredentials);
+
+      // If using IAM User Credentials, write to profile now so that the assumeRole call can succeed (and also for
+      // credential validation before role assumption).
+      if (awsProfile) {
+        writeProfileFiles(awsProfile, { AccessKeyId, SecretAccessKey, SessionToken }, region, overwriteAwsProfile);
+      }
     } else if (!webIdentityTokenFile && !roleChaining) {
       // Proceed only if credentials can be picked up
-      await credentialsClient.validateCredentials();
+      await credentialsClient.validateCredentials(undefined, roleChaining, expectedAccountIds);
       sourceAccountId = await exportAccountId(credentialsClient, maskAccountId);
     }
 
@@ -164,10 +187,9 @@ export async function run() {
       // Validate that the SDK can actually pick up credentials.
       // This validates cases where this action is using existing environment credentials,
       // and cases where the user intended to provide input credentials but the secrets inputs resolved to empty strings.
-      await credentialsClient.validateCredentials(AccessKeyId, roleChaining);
+      await credentialsClient.validateCredentials(AccessKeyId, roleChaining, expectedAccountIds);
       sourceAccountId = await exportAccountId(credentialsClient, maskAccountId);
     }
-
     // Get role credentials if configured to do so
     if (roleToAssume) {
       let roleCredentials: AssumeRoleCommandOutput;
@@ -182,6 +204,7 @@ export async function run() {
               roleDuration,
               roleSessionName,
               roleSkipSessionTagging,
+              transitiveTagKeys,
               webIdentityTokenFile,
               webIdentityToken,
               inlineSessionPolicy,
@@ -193,23 +216,63 @@ export async function run() {
         );
       } while (specialCharacterWorkaround && !verifyKeys(roleCredentials.Credentials));
       core.info(`Authenticated as assumedRoleId ${roleCredentials.AssumedRoleUser?.AssumedRoleId}`);
-      exportCredentials(roleCredentials.Credentials, outputCredentials);
+      exportCredentials(roleCredentials.Credentials, outputCredentials, outputEnvCredentials);
       // We need to validate the credentials in 2 of our use-cases
       // First: self-hosted runners. If the GITHUB_ACTIONS environment variable
       //  is set to `true` then we are NOT in a self-hosted runner.
       // Second: Customer provided credentials manually (IAM User keys stored in GH Secrets)
-      if (!process.env.GITHUB_ACTIONS || AccessKeyId) {
-        await credentialsClient.validateCredentials(roleCredentials.Credentials?.AccessKeyId);
+      // If we are using a profile, don't validate credentials yet (since they most likely won't be in the environment).
+      // Wait until after creds are written to the profile file to try validation.
+      if ((!process.env.GITHUB_ACTIONS || AccessKeyId) && !awsProfile) {
+        await credentialsClient.validateCredentials(
+          roleCredentials.Credentials?.AccessKeyId,
+          roleChaining,
+          expectedAccountIds,
+        );
+      }
+      if (outputEnvCredentials) {
+        await exportAccountId(credentialsClient, maskAccountId);
+      }
+
+      // Write profile files if profile mode is enabled
+      if (awsProfile) {
+        if (!roleCredentials.Credentials) {
+          throw new Error('AssumeRole call succeeded but returned no credentials');
+        }
+        // If user provided IAM User Credentials and then we assumed a role, overwrite the profile file to add
+        // the session token. (this only overwrites the profile within a single run of the action).
+        // We then validate the credentials to make sure they work.
+        if (AccessKeyId || !process.env.GITHUB_ACTIONS) {
+          writeProfileFiles(awsProfile, roleCredentials.Credentials, region, true);
+          await credentialsClient.validateCredentials(
+            roleCredentials.Credentials.AccessKeyId,
+            roleChaining,
+            expectedAccountIds,
+          );
+        } else {
+          writeProfileFiles(awsProfile, roleCredentials.Credentials, region, overwriteAwsProfile);
+        }
+
+        if (outputEnvCredentials) {
+          core.exportVariable('AWS_PROFILE', awsProfile);
+        }
       }
-      await exportAccountId(credentialsClient, maskAccountId);
     } else {
       core.info('Proceeding with IAM user credentials');
+
+      if (awsProfile) {
+        if (outputEnvCredentials) {
+          core.exportVariable('AWS_PROFILE', awsProfile);
+        }
+      }
     }
+
+    // Clear timeout on successful completion
+    if (timeoutId) clearTimeout(timeoutId);
   } catch (error) {
     core.setFailed(errorMessage(error));
 
     const showStackTrace = process.env.SHOW_STACK_TRACE;
-
     if (showStackTrace === 'true') {
       throw error;
     }

src/profileManager.ts

@@ -0,0 +1,214 @@
+import * as fs from 'node:fs';
+import * as os from 'node:os';
+import * as path from 'node:path';
+import * as core from '@actions/core';
+import type { Credentials } from '@aws-sdk/client-sts';
+
+/**
+ * Parse an INI-format string into a nested object.
+ * Preserves literal section names (e.g. "profile dev" stays as-is).
+ */
+export function parseIni(iniData: string): Record<string, Record<string, string>> {
+  const result: Record<string, Record<string, string>> = {};
+  let currentSection: string | undefined;
+
+  for (const line of iniData.split(/\r?\n/)) {
+    const trimmed = line.trim();
+    if (!trimmed || trimmed.startsWith(';') || trimmed.startsWith('#')) {
+      continue;
+    }
+
+    const sectionMatch = trimmed.match(/^\[([^\]]*)\]$/);
+    if (sectionMatch) {
+      currentSection = sectionMatch[1] as string;
+      if (currentSection === '__proto__') {
+        currentSection = undefined;
+        continue;
+      }
+      result[currentSection] = result[currentSection] || {};
+      continue;
+    }
+
+    if (currentSection) {
+      const eqIndex = trimmed.indexOf('=');
+      if (eqIndex > 0) {
+        const key = trimmed.substring(0, eqIndex).trim();
+        const value = trimmed.substring(eqIndex + 1).trim();
+        if (key !== '__proto__') {
+          const section = result[currentSection];
+          if (section) {
+            section[key] = value;
+          }
+        }
+      }
+    }
+  }
+
+  return result;
+}
+
+/**
+ * Serialize a nested object into INI-format string.
+ */
+export function stringifyIni(data: Record<string, Record<string, string>>): string {
+  const sections: string[] = [];
+  for (const [sectionName, sectionData] of Object.entries(data)) {
+    const lines: string[] = [`[${sectionName}]`];
+    for (const [key, value] of Object.entries(sectionData)) {
+      lines.push(`${key} = ${value}`);
+    }
+    sections.push(lines.join('\n'));
+  }
+  return `${sections.join('\n\n')}\n`;
+}
+
+interface ProfileFilePaths {
+  credentials: string;
+  config: string;
+}
+
+/**
+ * Get the file paths for AWS credentials and config files
+ * Respects AWS_SHARED_CREDENTIALS_FILE and AWS_CONFIG_FILE environment variables
+ */
+export function getProfileFilePaths(): ProfileFilePaths {
+  const credentialsPath = process.env.AWS_SHARED_CREDENTIALS_FILE || path.join(os.homedir(), '.aws', 'credentials');
+  const configPath = process.env.AWS_CONFIG_FILE || path.join(os.homedir(), '.aws', 'config');
+
+  return {
+    credentials: credentialsPath,
+    config: configPath,
+  };
+}
+
+/**
+ * Ensure the AWS directory exists with secure permissions
+ * Creates the directory with 700 permissions (rwx for owner only)
+ */
+export function ensureAwsDirectoryExists(filePath: string): void {
+  const dir = path.dirname(filePath);
+  if (!fs.existsSync(dir)) {
+    core.debug(`Creating directory: ${dir}`);
+    fs.mkdirSync(dir, { recursive: true, mode: 0o700 });
+  }
+}
+
+/**
+ * Validate profile name format
+ * Profile names must be non-empty, contain no whitespace, brackets, or path separators
+ */
+export function validateProfileName(profileName: string): void {
+  if (!profileName || profileName.trim() === '') {
+    throw new Error('aws-profile must not be empty');
+  }
+
+  if (/\s/.test(profileName)) {
+    throw new Error('aws-profile must not contain whitespace');
+  }
+
+  // INI section names can't contain brackets
+  if (/[[\]]/.test(profileName)) {
+    throw new Error('aws-profile must not contain brackets');
+  }
+
+  // Prevent path traversal
+  if (profileName.includes('/') || profileName.includes('\\')) {
+    throw new Error('aws-profile must not contain path separators');
+  }
+}
+
+/**
+ * Merge a profile section into an INI file
+ * Reads existing file, updates the specified section, and writes back
+ */
+export function mergeProfileSection(
+  filePath: string,
+  sectionName: string,
+  data: Record<string, string>,
+  overwriteAwsProfile: boolean,
+): void {
+  let existingContent: Record<string, Record<string, string>> = {};
+
+  // Read existing file if it exists
+  if (fs.existsSync(filePath)) {
+    core.debug(`Reading existing file: ${filePath}`);
+    const fileContent = fs.readFileSync(filePath, 'utf-8');
+    existingContent = parseIni(fileContent);
+  }
+
+  if (existingContent[sectionName] && !overwriteAwsProfile) {
+    throw new Error(
+      `Profile with name "${sectionName}" already exists. Please use the overwrite-aws-profile input if you want to overwrite existing profiles.`,
+    );
+  }
+  // Merge: update existing profile or add new one
+  existingContent[sectionName] = data;
+
+  const content = stringifyIni(existingContent);
+
+  core.debug(`Writing profile to ${filePath}`);
+  fs.writeFileSync(filePath, content, { mode: 0o600 });
+}
+
+/**
+ * Write AWS profile files with credentials and configuration
+ * This is the main entry point for profile file operations
+ *
+ * @param profileName - Name of the AWS profile to configure
+ * @param credentials - AWS credentials (access key, secret key, session token)
+ * @param region - AWS region
+ */
+export function writeProfileFiles(
+  profileName: string,
+  credentials: Partial<Credentials>,
+  region: string,
+  overwriteAwsProfile: boolean,
+): void {
+  try {
+    // Validate profile name
+    validateProfileName(profileName);
+
+    const paths = getProfileFilePaths();
+
+    // Ensure .aws directory exists
+    ensureAwsDirectoryExists(paths.credentials);
+    ensureAwsDirectoryExists(paths.config);
+
+    // Prepare credentials data
+    const credentialsData: Record<string, string> = {};
+    if (credentials.AccessKeyId) {
+      credentialsData.aws_access_key_id = credentials.AccessKeyId;
+    }
+    if (credentials.SecretAccessKey) {
+      credentialsData.aws_secret_access_key = credentials.SecretAccessKey;
+    }
+    if (credentials.SessionToken) {
+      credentialsData.aws_session_token = credentials.SessionToken;
+    }
+
+    // Credentials file uses [profileName] syntax
+    const credsSectionName = profileName;
+
+    // Config file uses [profile profileName] syntax, except for 'default'
+    const configSectionName = profileName === 'default' ? 'default' : `profile ${profileName}`;
+
+    // Prepare config data
+    const configData: Record<string, string> = {
+      region: region,
+    };
+
+    // Write to credentials file
+    core.info(`Writing credentials to profile: ${profileName}`);
+    mergeProfileSection(paths.credentials, credsSectionName, credentialsData, overwriteAwsProfile);
+
+    // Write to config file
+    core.info(`Writing config to profile: ${profileName}`);
+    mergeProfileSection(paths.config, configSectionName, configData, overwriteAwsProfile);
+
+    core.info(`✓ Successfully configured AWS profile: ${profileName}`);
+  } catch (error) {
+    throw new Error(
+      `Failed to write AWS profile '${profileName}': ${error instanceof Error ? error.message : String(error)}`,
+    );
+  }
+}

test/ProxyResolver.test.ts

@@ -0,0 +1,100 @@
+import type * as http from 'node:http';
+import { describe, expect, test } from 'vitest';
+import { type ProxyOptions, ProxyResolver } from '../src/ProxyResolver';
+
+describe('ProxyResolver', () => {
+  const mockReq = {} as http.ClientRequest;
+
+  test('returns http proxy for http URLs', () => {
+    const options: ProxyOptions = { httpProxy: 'http://proxy:8080' };
+    const resolver = new ProxyResolver(options);
+
+    expect(resolver.getProxyForUrl('http://example.com', mockReq)).toBe('http://proxy:8080');
+  });
+
+  test('returns https proxy for https URLs', () => {
+    const options: ProxyOptions = { httpsProxy: 'https://proxy:8080' };
+    const resolver = new ProxyResolver(options);
+
+    expect(resolver.getProxyForUrl('https://example.com', mockReq)).toBe('https://proxy:8080');
+  });
+
+  test('returns empty string when no proxy configured', () => {
+    const resolver = new ProxyResolver({});
+
+    expect(resolver.getProxyForUrl('http://example.com', mockReq)).toBe('');
+  });
+
+  test('respects noProxy setting', () => {
+    const options: ProxyOptions = {
+      httpProxy: 'http://proxy:8080',
+      noProxy: 'example.com',
+    };
+    const resolver = new ProxyResolver(options);
+
+    expect(resolver.getProxyForUrl('http://example.com', mockReq)).toBe('');
+    expect(resolver.getProxyForUrl('http://other.com', mockReq)).toBe('http://proxy:8080');
+  });
+
+  test('handles invalid URLs', () => {
+    const resolver = new ProxyResolver({ httpProxy: 'http://proxy:8080' });
+
+    expect(resolver.getProxyForUrl('invalid-url', mockReq)).toBe('');
+  });
+
+  test('handles wildcard noProxy', () => {
+    const options: ProxyOptions = {
+      httpProxy: 'http://proxy:8080',
+      noProxy: '*',
+    };
+    const resolver = new ProxyResolver(options);
+
+    expect(resolver.getProxyForUrl('http://example.com', mockReq)).toBe('');
+  });
+
+  test('handles comma-separated noProxy list', () => {
+    const options: ProxyOptions = {
+      httpProxy: 'http://proxy:8080',
+      noProxy: 'example.com,test.com',
+    };
+    const resolver = new ProxyResolver(options);
+
+    expect(resolver.getProxyForUrl('http://example.com', mockReq)).toBe('');
+    expect(resolver.getProxyForUrl('http://test.com', mockReq)).toBe('');
+    expect(resolver.getProxyForUrl('http://other.com', mockReq)).toBe('http://proxy:8080');
+  });
+
+  test('handles port-specific noProxy', () => {
+    const options: ProxyOptions = {
+      httpProxy: 'http://proxy:8080',
+      noProxy: 'example.com:80',
+    };
+    const resolver = new ProxyResolver(options);
+
+    expect(resolver.getProxyForUrl('http://example.com', mockReq)).toBe('');
+    expect(resolver.getProxyForUrl('http://example.com:8080', mockReq)).toBe('http://proxy:8080');
+  });
+
+  test('handles wildcard domain noProxy', () => {
+    const options: ProxyOptions = {
+      httpProxy: 'http://proxy:8080',
+      noProxy: '*.example.com',
+    };
+    const resolver = new ProxyResolver(options);
+
+    expect(resolver.getProxyForUrl('http://sub.example.com', mockReq)).toBe('');
+    expect(resolver.getProxyForUrl('http://example.com', mockReq)).toBe('http://proxy:8080');
+    expect(resolver.getProxyForUrl('http://other.com', mockReq)).toBe('http://proxy:8080');
+  });
+
+  test('handles empty noProxy entries', () => {
+    const options: ProxyOptions = {
+      httpProxy: 'http://proxy:8080',
+      noProxy: 'example.com, ,test.com',
+    };
+    const resolver = new ProxyResolver(options);
+
+    expect(resolver.getProxyForUrl('http://example.com', mockReq)).toBe('');
+    expect(resolver.getProxyForUrl('http://test.com', mockReq)).toBe('');
+  });
+});

test/cleanup.test.ts

@@ -1,8 +1,8 @@
-import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
-import { cleanup } from '../src/cleanup';
 import * as core from '@actions/core';
-import { mockClient } from 'aws-sdk-client-mock';
 import { STSClient } from '@aws-sdk/client-sts';
+import { mockClient } from 'aws-sdk-client-mock';
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+import { cleanup } from '../src/cleanup';
 import mocks from './mockinputs.test';
 
 const mockedSTSClient = mockClient(STSClient);
@@ -38,6 +38,26 @@ describe('Configure AWS Credentials cleanup', {}, () => {
     expect(core.exportVariable).toHaveBeenCalledWith('AWS_DEFAULT_REGION', '');
     expect(core.exportVariable).toHaveBeenCalledWith('AWS_REGION', '');
   });
+  it('also clears AWS_PROFILE when aws-profile was set', {}, () => {
+    vi.spyOn(core, 'getInput').mockImplementation((name: string) => {
+      if (name === 'aws-profile') return 'my-profile';
+      if (name === 'output-env-credentials') return 'true';
+      return '';
+    });
+    cleanup();
+    expect(core.setFailed).toHaveBeenCalledTimes(0);
+    expect(core.exportVariable).toHaveBeenCalledTimes(6);
+    expect(core.exportVariable).toHaveBeenCalledWith('AWS_PROFILE', '');
+  });
+  it('skips env cleanup when aws-profile is set without output-env-credentials', {}, () => {
+    vi.spyOn(core, 'getInput').mockImplementation((name: string) => {
+      if (name === 'aws-profile') return 'my-profile';
+      return '';
+    });
+    cleanup();
+    expect(core.setFailed).toHaveBeenCalledTimes(0);
+    expect(core.exportVariable).toHaveBeenCalledTimes(0);
+  });
   it('handles errors', {}, () => {
     vi.spyOn(core, 'exportVariable').mockImplementationOnce(() => {
       throw new Error('Test error');
@@ -45,4 +65,9 @@ describe('Configure AWS Credentials cleanup', {}, () => {
     cleanup();
     expect(core.setFailed).toHaveBeenCalled();
   });
+  it(`doesn't export credentials as empty env variables if asked not to`, {}, () => {
+    vi.spyOn(core, 'getInput').mockImplementation(mocks.getInput(mocks.NO_ENV_CREDS_INPUTS));
+    cleanup();
+    expect(core.exportVariable).toHaveBeenCalledTimes(0);
+  });
 });

test/helpers.test.ts

@@ -1,19 +1,19 @@
-import { describe, it, expect, vi } from 'vitest';
-import * as helpers from '../src/helpers';
 import * as core from '@actions/core';
-import { before, beforeEach } from 'node:test';
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+import * as helpers from '../src/helpers';
 
 describe('Configure AWS Credentials helpers', {}, () => {
   beforeEach(() => {
     vi.restoreAllMocks();
+    vi.spyOn(core, 'debug').mockImplementation(() => {});
   });
   it('removes brackets from GitHub Actor', {}, () => {
     const actor = 'actor[bot]';
     expect(helpers.sanitizeGitHubVariables(actor)).toBe('actor_bot_');
   });
-  it('can sleep', {}, () => {
+  it('can sleep', {}, async () => {
     const sleep = helpers.defaultSleep(10);
-    expect(Promise.race([sleep, new Promise((_, reject) => setTimeout(reject, 20))])).resolves.toBe(undefined);
+    await expect(Promise.race([sleep, new Promise((_, reject) => setTimeout(reject, 20))])).resolves.toBe(undefined);
   });
   it('removes special characters from workflow names', {}, () => {
     expect(helpers.sanitizeGitHubVariables('sdf234@#$%$^&*()_+{}|:"<>?')).toEqual('sdf234@__________+___:____');
@@ -27,7 +27,11 @@ describe('Configure AWS Credentials helpers', {}, () => {
     vi.spyOn(core, 'setOutput').mockImplementation(() => {});
     vi.spyOn(core, 'setSecret').mockImplementation(() => {});
     vi.spyOn(core, 'exportVariable').mockImplementation(() => {});
-    helpers.exportCredentials({ AccessKeyId: 'test', SecretAccessKey: 'test', SessionToken: 'test', Expiration: new Date(8640000000000000) }, true);
+    helpers.exportCredentials(
+      { AccessKeyId: 'test', SecretAccessKey: 'test', SessionToken: 'test', Expiration: new Date(8640000000000000) },
+      true,
+      true,
+    );
     expect(core.setOutput).toHaveBeenCalledTimes(4);
     expect(core.setSecret).toHaveBeenCalledTimes(3);
     expect(core.exportVariable).toHaveBeenCalledTimes(3);
@@ -42,4 +46,55 @@ describe('Configure AWS Credentials helpers', {}, () => {
     expect(process.env.AWS_DEFAULT_REGION).toBeUndefined;
     process.env = env;
   });
+  it(`won't output credentials to env if told not to`, {}, () => {
+    vi.spyOn(core, 'setOutput').mockImplementation(() => {});
+    vi.spyOn(core, 'setSecret').mockImplementation(() => {});
+    vi.spyOn(core, 'exportVariable').mockImplementation(() => {});
+    helpers.exportCredentials(
+      { AccessKeyId: 'test', SecretAccessKey: 'test', SessionToken: 'test', Expiration: new Date(8640000000000000) },
+      true,
+      false,
+    );
+    helpers.unsetCredentials(false);
+    helpers.exportRegion('fake-test-region', false);
+    expect(core.setOutput).toHaveBeenCalledTimes(4);
+    expect(core.setSecret).toHaveBeenCalledTimes(3);
+    expect(core.exportVariable).toHaveBeenCalledTimes(0);
+  });
+
+  it('verifies credentials without special characters', {}, () => {
+    expect(helpers.verifyKeys({ AccessKeyId: 'AKIATEST', SecretAccessKey: 'secretkey' })).toBe(true);
+    expect(helpers.verifyKeys({ AccessKeyId: 'AKIA!@#$', SecretAccessKey: 'secret' })).toBe(false);
+    expect(helpers.verifyKeys(undefined)).toBe(false);
+  });
+
+  it('translates environment variables', {}, () => {
+    process.env.AWS_REGION = 'us-east-1';
+    process.env.HTTPS_PROXY = 'https://proxy:8080';
+    helpers.translateEnvVariables();
+    expect(process.env['INPUT_AWS-REGION']).toBe('us-east-1');
+    expect(process.env.HTTP_PROXY).toBe('https://proxy:8080');
+  });
+
+  it('handles getBooleanInput correctly', {}, () => {
+    vi.spyOn(core, 'getInput').mockReturnValue('true');
+    expect(helpers.getBooleanInput('test')).toBe(true);
+    
+    vi.spyOn(core, 'getInput').mockReturnValue('false');
+    expect(helpers.getBooleanInput('test')).toBe(false);
+    
+    vi.spyOn(core, 'getInput').mockReturnValue('');
+    expect(helpers.getBooleanInput('test', { default: true })).toBe(true);
+    
+    vi.spyOn(core, 'getInput').mockReturnValue('invalid');
+    expect(() => helpers.getBooleanInput('test')).toThrow();
+  });
+
+  it('clears session token when not provided', {}, () => {
+    vi.spyOn(core, 'setSecret').mockImplementation(() => {});
+    vi.spyOn(core, 'exportVariable').mockImplementation(() => {});
+    process.env.AWS_SESSION_TOKEN = 'old-token';
+    helpers.exportCredentials({ AccessKeyId: 'test', SecretAccessKey: 'test' }, false, true);
+    expect(core.exportVariable).toHaveBeenCalledWith('AWS_SESSION_TOKEN', '');
+  });
 });

test/index.test.ts

@@ -1,17 +1,17 @@
-import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
+import * as core from '@actions/core';
 import {
   AssumeRoleCommand,
   AssumeRoleWithWebIdentityCommand,
   GetCallerIdentityCommand,
   STSClient,
 } from '@aws-sdk/client-sts';
-import { fs, vol } from 'memfs';
-import * as core from '@actions/core';
-import mocks from './mockinputs.test';
 import { mockClient } from 'aws-sdk-client-mock';
-import { run } from '../src/index';
+import { fs, vol } from 'memfs';
+import { beforeEach, describe, expect, it, vi } from 'vitest';
 import { CredentialsClient } from '../src/CredentialsClient';
-import { before } from 'node:test';
+import { run } from '../src/index';
+import * as profileManager from '../src/profileManager';
+import mocks from './mockinputs.test';
 
 const mockedSTSClient = mockClient(STSClient);
 
@@ -48,7 +48,7 @@ describe('Configure AWS Credentials', {}, () => {
       expect(core.info).toHaveBeenCalledWith('Authenticated as assumedRoleId AROAFAKEASSUMEDROLEID');
       expect(core.info).toHaveBeenCalledTimes(2);
       expect(core.setOutput).toHaveBeenCalledWith('aws-account-id', '111111111111');
-      expect(core.setOutput).toHaveBeenCalledOnce();
+      expect(core.setOutput).toHaveBeenCalledTimes(2);
       expect(core.setSecret).toHaveBeenCalledWith('STSAWSACCESSKEYID');
       expect(core.setSecret).toHaveBeenCalledWith('STSAWSSECRETACCESSKEY');
       expect(core.setSecret).toHaveBeenCalledWith('STSAWSSESSIONTOKEN');
@@ -72,7 +72,7 @@ describe('Configure AWS Credentials', {}, () => {
       expect(core.info).toHaveBeenCalledWith('Authenticated as assumedRoleId AROAFAKEASSUMEDROLEID');
       expect(core.info).toHaveBeenCalledTimes(3);
       expect(core.setOutput).toHaveBeenCalledWith('aws-account-id', '111111111111');
-      expect(core.setOutput).toHaveBeenCalledOnce();
+      expect(core.setOutput).toHaveBeenCalledTimes(2);
       expect(core.setSecret).toHaveBeenCalledWith('STSAWSACCESSKEYID');
       expect(core.setSecret).toHaveBeenCalledWith('STSAWSSECRETACCESSKEY');
       expect(core.setSecret).toHaveBeenCalledWith('STSAWSSESSIONTOKEN');
@@ -107,7 +107,7 @@ describe('Configure AWS Credentials', {}, () => {
       expect(core.setSecret).toHaveBeenCalledWith('MYAWSSECRETACCESSKEY');
       expect(core.setSecret).toHaveBeenCalledTimes(2);
       expect(core.setOutput).toHaveBeenCalledWith('aws-account-id', '111111111111');
-      expect(core.setOutput).toHaveBeenCalledOnce();
+      expect(core.setOutput).toHaveBeenCalledTimes(2);
       expect(core.info).toHaveBeenCalledWith('Proceeding with IAM user credentials');
       expect(core.info).toHaveBeenCalledOnce();
       expect(core.setFailed).not.toHaveBeenCalled();
@@ -141,7 +141,7 @@ describe('Configure AWS Credentials', {}, () => {
       expect(core.setSecret).toHaveBeenCalledWith('MYAWSSECRETACCESSKEY');
       expect(core.setSecret).toHaveBeenCalledTimes(5);
       expect(core.setOutput).toHaveBeenCalledWith('aws-account-id', '111111111111');
-      expect(core.setOutput).toHaveBeenCalledTimes(2);
+      expect(core.setOutput).toHaveBeenCalledTimes(4);
       expect(core.info).toHaveBeenCalledWith('Assuming role with user credentials');
       expect(core.info).toHaveBeenCalledWith('Authenticated as assumedRoleId AROAFAKEASSUMEDROLEID');
       expect(core.info).toHaveBeenCalledTimes(2);
@@ -174,7 +174,7 @@ describe('Configure AWS Credentials', {}, () => {
       expect(core.setSecret).toHaveBeenCalledWith('STSAWSSESSIONTOKEN');
       expect(core.setSecret).toHaveBeenCalledTimes(3);
       expect(core.setOutput).toHaveBeenCalledWith('aws-account-id', '111111111111');
-      expect(core.setOutput).toHaveBeenCalledTimes(1);
+      expect(core.setOutput).toHaveBeenCalledTimes(2);
       expect(core.setFailed).not.toHaveBeenCalled();
     });
   });
@@ -205,7 +205,7 @@ describe('Configure AWS Credentials', {}, () => {
       expect(core.setSecret).toHaveBeenCalledWith('STSAWSSESSIONTOKEN');
       expect(core.setSecret).toHaveBeenCalledTimes(3);
       expect(core.setOutput).toHaveBeenCalledWith('aws-account-id', '111111111111');
-      expect(core.setOutput).toHaveBeenCalledTimes(2);
+      expect(core.setOutput).toHaveBeenCalledTimes(4);
       expect(core.setFailed).not.toHaveBeenCalled();
     });
     it('exports environment variables from inputs', {}, async () => {
@@ -238,7 +238,7 @@ describe('Configure AWS Credentials', {}, () => {
       expect(core.setSecret).toHaveBeenCalledWith('STSAWSSESSIONTOKEN');
       expect(core.setSecret).toHaveBeenCalledTimes(6);
       expect(core.setOutput).toHaveBeenCalledWith('aws-account-id', '111111111111');
-      expect(core.setOutput).toHaveBeenCalledTimes(2);
+      expect(core.setOutput).toHaveBeenCalledTimes(4);
       expect(core.setFailed).not.toHaveBeenCalled();
     });
   });
@@ -300,17 +300,725 @@ describe('Configure AWS Credentials', {}, () => {
       await run();
       expect(core.setFailed).toHaveBeenCalled();
     });
-    it('gets new creds if told to reuse existing but they\'re invalid', {}, async () => {
+    it("gets new creds if told to reuse existing but they're invalid", {}, async () => {
       vi.spyOn(core, 'getInput').mockImplementation(mocks.getInput(mocks.USE_EXISTING_CREDENTIALS_INPUTS));
       mockedSTSClient.on(GetCallerIdentityCommand).rejects();
       await run();
-      expect(core.notice).toHaveBeenCalledWith('No valid credentials exist. Running as normal.')
+      expect(core.notice).toHaveBeenCalledWith('No valid credentials exist. Running as normal.');
     });
-    it('doesn\'t get new creds if there are already valid ones and we said use them', {}, async () => {
+    it("doesn't get new creds if there are already valid ones and we said use them", {}, async () => {
       vi.spyOn(core, 'getInput').mockImplementation(mocks.getInput(mocks.USE_EXISTING_CREDENTIALS_INPUTS));
       mockedSTSClient.on(GetCallerIdentityCommand).resolves(mocks.outputs.GET_CALLER_IDENTITY);
       await run();
       expect(core.setFailed).not.toHaveBeenCalled();
-    })
+    });
+    it("doesn't export credentials as environment variables if told not to", {}, async () => {
+      mockedSTSClient.on(AssumeRoleWithWebIdentityCommand).resolvesOnce(mocks.outputs.STS_CREDENTIALS);
+      vi.spyOn(core, 'getInput').mockImplementation(mocks.getInput(mocks.NO_ENV_CREDS_INPUTS));
+      vi.spyOn(core, 'getIDToken').mockResolvedValue('testoidctoken');
+      process.env.ACTIONS_ID_TOKEN_REQUEST_TOKEN = 'fake-token';
+      await run();
+      expect(core.setSecret).toHaveBeenCalledTimes(3);
+      expect(core.exportVariable).toHaveBeenCalledTimes(0);
+      expect(core.setFailed).not.toHaveBeenCalled();
+    });
+    it('can export creds as step outputs without exporting as env variables', {}, async () => {
+      mockedSTSClient.on(AssumeRoleWithWebIdentityCommand).resolvesOnce(mocks.outputs.STS_CREDENTIALS);
+      vi.spyOn(core, 'getInput').mockImplementation(mocks.getInput(mocks.STEP_BUT_NO_ENV_INPUTS));
+      vi.spyOn(core, 'getIDToken').mockResolvedValue('testoidctoken');
+      process.env.ACTIONS_ID_TOKEN_REQUEST_TOKEN = 'fake-token';
+      await run();
+      expect(core.setSecret).toHaveBeenCalledTimes(3);
+      expect(core.exportVariable).toHaveBeenCalledTimes(0);
+      expect(core.setOutput).toHaveBeenCalledTimes(4);
+      expect(core.setFailed).not.toHaveBeenCalled();
+    });
+  });
+
+  describe('Force Skip OIDC', {}, () => {
+    beforeEach(() => {
+      vi.clearAllMocks();
+      mockedSTSClient.reset();
+    });
+
+    it('skips OIDC when force-skip-oidc is true with IAM credentials', async () => {
+      vi.spyOn(core, 'getInput').mockImplementation(
+        mocks.getInput({
+          ...mocks.IAM_ASSUMEROLE_INPUTS,
+          'force-skip-oidc': 'true',
+        }),
+      );
+      vi.spyOn(core, 'getIDToken').mockResolvedValue('testoidctoken');
+      mockedSTSClient.on(AssumeRoleCommand).resolves(mocks.outputs.STS_CREDENTIALS);
+      mockedSTSClient.on(GetCallerIdentityCommand).resolves({ ...mocks.outputs.GET_CALLER_IDENTITY });
+      // biome-ignore lint/suspicious/noExplicitAny: any required to mock private method
+      vi.spyOn(CredentialsClient.prototype as any, 'loadCredentials')
+        .mockResolvedValueOnce({ accessKeyId: 'MYAWSACCESSKEYID' })
+        .mockResolvedValueOnce({ accessKeyId: 'STSAWSACCESSKEYID' });
+      process.env.ACTIONS_ID_TOKEN_REQUEST_TOKEN = 'fake-token';
+
+      await run();
+      expect(core.getIDToken).not.toHaveBeenCalled();
+      expect(core.setFailed).not.toHaveBeenCalled();
+    });
+
+    it('skips OIDC when force-skip-oidc is true with web identity token file', async () => {
+      vi.spyOn(core, 'getInput').mockImplementation(
+        mocks.getInput({
+          ...mocks.WEBIDENTITY_TOKEN_FILE_INPUTS,
+          'force-skip-oidc': 'true',
+        }),
+      );
+      vi.spyOn(core, 'getIDToken').mockResolvedValue('testoidctoken');
+      mockedSTSClient.on(AssumeRoleWithWebIdentityCommand).resolves(mocks.outputs.STS_CREDENTIALS);
+      mockedSTSClient.on(GetCallerIdentityCommand).resolves({ ...mocks.outputs.GET_CALLER_IDENTITY });
+      process.env.ACTIONS_ID_TOKEN_REQUEST_TOKEN = 'fake-token';
+      vi.mock('node:fs');
+      vol.reset();
+      fs.mkdirSync('/home/github', { recursive: true });
+      fs.writeFileSync('/home/github/file.txt', 'test-token');
+
+      await run();
+      expect(core.getIDToken).not.toHaveBeenCalled();
+      expect(core.info).toHaveBeenCalledWith('Assuming role with web identity token file');
+      expect(core.setFailed).not.toHaveBeenCalled();
+    });
+
+    it('fails when force-skip-oidc is true but no alternative credentials provided', async () => {
+      vi.spyOn(core, 'getInput').mockImplementation(
+        mocks.getInput({
+          'role-to-assume': 'arn:aws:iam::111111111111:role/MY-ROLE',
+          'aws-region': 'fake-region-1',
+          'force-skip-oidc': 'true',
+        }),
+      );
+      process.env.ACTIONS_ID_TOKEN_REQUEST_TOKEN = 'fake-token';
+
+      await run();
+      expect(core.setFailed).toHaveBeenCalledWith(
+        "If 'force-skip-oidc' is true and 'role-to-assume' is set, 'aws-access-key-id' or 'web-identity-token-file' must be set",
+      );
+    });
+
+    it('allows force-skip-oidc without role-to-assume', async () => {
+      vi.spyOn(core, 'getInput').mockImplementation(
+        mocks.getInput({
+          ...mocks.IAM_USER_INPUTS,
+          'force-skip-oidc': 'true',
+        }),
+      );
+      vi.spyOn(core, 'getIDToken').mockResolvedValue('testoidctoken');
+
+      mockedSTSClient.on(GetCallerIdentityCommand).resolves({ ...mocks.outputs.GET_CALLER_IDENTITY });
+      // biome-ignore lint/suspicious/noExplicitAny: any required to mock private method
+      vi.spyOn(CredentialsClient.prototype as any, 'loadCredentials').mockResolvedValue({
+        accessKeyId: 'MYAWSACCESSKEYID',
+      });
+
+      process.env.ACTIONS_ID_TOKEN_REQUEST_TOKEN = 'fake-token';
+
+      await run();
+      expect(core.getIDToken).not.toHaveBeenCalled();
+      expect(core.info).toHaveBeenCalledWith('Proceeding with IAM user credentials');
+      expect(core.setFailed).not.toHaveBeenCalled();
+    });
+
+    it('uses OIDC when force-skip-oidc is false (default behavior)', async () => {
+      vi.spyOn(core, 'getInput').mockImplementation(
+        mocks.getInput({
+          ...mocks.GH_OIDC_INPUTS,
+          'force-skip-oidc': 'false',
+        }),
+      );
+      vi.spyOn(core, 'getIDToken').mockResolvedValue('testoidctoken');
+      mockedSTSClient.on(AssumeRoleWithWebIdentityCommand).resolves(mocks.outputs.STS_CREDENTIALS);
+      mockedSTSClient.on(GetCallerIdentityCommand).resolves({ ...mocks.outputs.GET_CALLER_IDENTITY });
+      process.env.ACTIONS_ID_TOKEN_REQUEST_TOKEN = 'fake-token';
+
+      await run();
+      expect(core.getIDToken).toHaveBeenCalledWith('');
+      expect(core.info).toHaveBeenCalledWith('Assuming role with OIDC');
+      expect(core.setFailed).not.toHaveBeenCalled();
+    });
+
+    it('uses OIDC when force-skip-oidc is not set (default behavior)', async () => {
+      vi.spyOn(core, 'getInput').mockImplementation(mocks.getInput(mocks.GH_OIDC_INPUTS));
+      vi.spyOn(core, 'getIDToken').mockResolvedValue('testoidctoken');
+      mockedSTSClient.on(AssumeRoleWithWebIdentityCommand).resolves(mocks.outputs.STS_CREDENTIALS);
+      mockedSTSClient.on(GetCallerIdentityCommand).resolves({ ...mocks.outputs.GET_CALLER_IDENTITY });
+      process.env.ACTIONS_ID_TOKEN_REQUEST_TOKEN = 'fake-token';
+
+      await run();
+      expect(core.getIDToken).toHaveBeenCalledWith('');
+      expect(core.info).toHaveBeenCalledWith('Assuming role with OIDC');
+      expect(core.setFailed).not.toHaveBeenCalled();
+    });
+
+    it('works with role chaining when force-skip-oidc is true', async () => {
+      vi.spyOn(core, 'getInput').mockImplementation(
+        mocks.getInput({
+          ...mocks.EXISTING_ROLE_INPUTS,
+          'force-skip-oidc': 'true',
+          'aws-access-key-id': 'MYAWSACCESSKEYID',
+          'aws-secret-access-key': 'MYAWSSECRETACCESSKEY',
+        }),
+      );
+      vi.spyOn(core, 'getIDToken').mockResolvedValue('testoidctoken');
+      mockedSTSClient.on(AssumeRoleCommand).resolves(mocks.outputs.STS_CREDENTIALS);
+      mockedSTSClient.on(GetCallerIdentityCommand).resolves({ ...mocks.outputs.GET_CALLER_IDENTITY });
+      // biome-ignore lint/suspicious/noExplicitAny: any required to mock private method
+      vi.spyOn(CredentialsClient.prototype as any, 'loadCredentials')
+        .mockResolvedValueOnce({ accessKeyId: 'MYAWSACCESSKEYID' })
+        .mockResolvedValueOnce({ accessKeyId: 'STSAWSACCESSKEYID' });
+      process.env.ACTIONS_ID_TOKEN_REQUEST_TOKEN = 'fake-token';
+
+      await run();
+      expect(core.getIDToken).not.toHaveBeenCalled();
+      expect(core.setFailed).not.toHaveBeenCalled();
+    });
+  });
+
+  describe('Account ID Validation', {}, () => {
+    beforeEach(() => {
+      vi.clearAllMocks();
+      mockedSTSClient.reset();
+    });
+
+    it('succeeds when account ID matches allowed list', async () => {
+      vi.spyOn(core, 'getInput').mockImplementation(
+        mocks.getInput({
+          ...mocks.IAM_USER_INPUTS,
+          'allowed-account-ids': '111111111111',
+        }),
+      );
+      mockedSTSClient.on(GetCallerIdentityCommand).resolves({ ...mocks.outputs.GET_CALLER_IDENTITY });
+      // biome-ignore lint/suspicious/noExplicitAny: any required to mock private method
+      vi.spyOn(CredentialsClient.prototype as any, 'loadCredentials').mockResolvedValue({
+        accessKeyId: 'MYAWSACCESSKEYID',
+      });
+
+      await run();
+      expect(core.setFailed).not.toHaveBeenCalled();
+      expect(core.info).toHaveBeenCalledWith('Proceeding with IAM user credentials');
+    });
+
+    it('succeeds with multiple allowed account IDs when account matches', async () => {
+      vi.spyOn(core, 'getInput').mockImplementation(
+        mocks.getInput({
+          ...mocks.IAM_USER_INPUTS,
+          'allowed-account-ids': '999999999999,111111111111,222222222222',
+        }),
+      );
+      mockedSTSClient.on(GetCallerIdentityCommand).resolves({ ...mocks.outputs.GET_CALLER_IDENTITY });
+      // biome-ignore lint/suspicious/noExplicitAny: any required to mock private method
+      vi.spyOn(CredentialsClient.prototype as any, 'loadCredentials').mockResolvedValue({
+        accessKeyId: 'MYAWSACCESSKEYID',
+      });
+
+      await run();
+      expect(core.setFailed).not.toHaveBeenCalled();
+    });
+
+    it('fails when account ID does not match allowed list', async () => {
+      vi.spyOn(core, 'getInput').mockImplementation(
+        mocks.getInput({
+          ...mocks.IAM_USER_INPUTS,
+          'allowed-account-ids': '999999999999',
+        }),
+      );
+      mockedSTSClient.on(GetCallerIdentityCommand).resolves({ ...mocks.outputs.GET_CALLER_IDENTITY });
+      // biome-ignore lint/suspicious/noExplicitAny: any required to mock private method
+      vi.spyOn(CredentialsClient.prototype as any, 'loadCredentials').mockResolvedValue({
+        accessKeyId: 'MYAWSACCESSKEYID',
+      });
+
+      await run();
+      expect(core.setFailed).toHaveBeenCalledWith(
+        'The account ID of the provided credentials (111111111111) does not match any of the expected account IDs: 999999999999',
+      );
+    });
+
+    it('fails when account ID does not match any in multiple allowed accounts', async () => {
+      vi.spyOn(core, 'getInput').mockImplementation(
+        mocks.getInput({
+          ...mocks.IAM_USER_INPUTS,
+          'allowed-account-ids': '999999999999,888888888888',
+        }),
+      );
+
+      mockedSTSClient.on(GetCallerIdentityCommand).resolves({ ...mocks.outputs.GET_CALLER_IDENTITY });
+      // biome-ignore lint/suspicious/noExplicitAny: any required to mock private method
+      vi.spyOn(CredentialsClient.prototype as any, 'loadCredentials').mockResolvedValue({
+        accessKeyId: 'MYAWSACCESSKEYID',
+      });
+
+      await run();
+      expect(core.setFailed).toHaveBeenCalledWith(
+        'The account ID of the provided credentials (111111111111) does not match any of the expected account IDs: 999999999999, 888888888888',
+      );
+    });
+
+    it('works with assume role when account ID matches', async () => {
+      vi.spyOn(core, 'getInput').mockImplementation(
+        mocks.getInput({
+          ...mocks.IAM_ASSUMEROLE_INPUTS,
+          'allowed-account-ids': '111111111111',
+        }),
+      );
+      mockedSTSClient.on(AssumeRoleCommand).resolves(mocks.outputs.STS_CREDENTIALS);
+      mockedSTSClient.on(GetCallerIdentityCommand).resolves({ ...mocks.outputs.GET_CALLER_IDENTITY });
+      // biome-ignore lint/suspicious/noExplicitAny: any required to mock private method
+      vi.spyOn(CredentialsClient.prototype as any, 'loadCredentials')
+        .mockResolvedValueOnce({ accessKeyId: 'MYAWSACCESSKEYID' })
+        .mockResolvedValueOnce({ accessKeyId: 'STSAWSACCESSKEYID' });
+
+      await run();
+      expect(core.setFailed).not.toHaveBeenCalled();
+      expect(core.info).toHaveBeenCalledWith('Authenticated as assumedRoleId AROAFAKEASSUMEDROLEID');
+    });
+
+    it('works with OIDC when account ID matches', async () => {
+      vi.spyOn(core, 'getInput').mockImplementation(
+        mocks.getInput({
+          ...mocks.GH_OIDC_INPUTS,
+          'allowed-account-ids': '111111111111',
+        }),
+      );
+      vi.spyOn(core, 'getIDToken').mockResolvedValue('testoidctoken');
+      mockedSTSClient.on(AssumeRoleWithWebIdentityCommand).resolves(mocks.outputs.STS_CREDENTIALS);
+      mockedSTSClient.on(GetCallerIdentityCommand).resolves({ ...mocks.outputs.GET_CALLER_IDENTITY });
+      process.env.ACTIONS_ID_TOKEN_REQUEST_TOKEN = 'fake-token';
+
+      await run();
+      expect(core.setFailed).not.toHaveBeenCalled();
+      expect(core.info).toHaveBeenCalledWith('Authenticated as assumedRoleId AROAFAKEASSUMEDROLEID');
+    });
+
+    it('handles GetCallerIdentity API failure gracefully', async () => {
+      vi.spyOn(core, 'getInput').mockImplementation(
+        mocks.getInput({
+          ...mocks.IAM_USER_INPUTS,
+          'allowed-account-ids': '111111111111',
+        }),
+      );
+      mockedSTSClient.on(GetCallerIdentityCommand).rejects(new Error('API Error'));
+      // biome-ignore lint/suspicious/noExplicitAny: any required to mock private method
+      vi.spyOn(CredentialsClient.prototype as any, 'loadCredentials').mockResolvedValue({
+        accessKeyId: 'MYAWSACCESSKEYID',
+      });
+
+      await run();
+      expect(core.setFailed).toHaveBeenCalledWith('Could not validate account ID of credentials: API Error');
+    });
+
+    it('ignores validation when allowed-account-ids is empty', async () => {
+      vi.spyOn(core, 'getInput').mockImplementation(
+        mocks.getInput({
+          ...mocks.IAM_USER_INPUTS,
+          'allowed-account-ids': '',
+        }),
+      );
+      mockedSTSClient.on(GetCallerIdentityCommand).resolves({ ...mocks.outputs.GET_CALLER_IDENTITY });
+      // biome-ignore lint/suspicious/noExplicitAny: any required to mock private method
+      vi.spyOn(CredentialsClient.prototype as any, 'loadCredentials').mockResolvedValue({
+        accessKeyId: 'MYAWSACCESSKEYID',
+      });
+
+      await run();
+      expect(core.setFailed).not.toHaveBeenCalled();
+      expect(core.info).toHaveBeenCalledWith('Proceeding with IAM user credentials');
+    });
+
+    it('handles whitespace in allowed-account-ids input', async () => {
+      vi.spyOn(core, 'getInput').mockImplementation(
+        mocks.getInput({
+          ...mocks.IAM_USER_INPUTS,
+          'allowed-account-ids': ' 111111111111 , 222222222222 ',
+        }),
+      );
+      mockedSTSClient.on(GetCallerIdentityCommand).resolves({ ...mocks.outputs.GET_CALLER_IDENTITY });
+      // biome-ignore lint/suspicious/noExplicitAny: any required to mock private method
+      vi.spyOn(CredentialsClient.prototype as any, 'loadCredentials').mockResolvedValue({
+        accessKeyId: 'MYAWSACCESSKEYID',
+      });
+
+      await run();
+      expect(core.setFailed).not.toHaveBeenCalled();
+    });
+  });
+
+  describe('Global Timeout Configuration', {}, () => {
+    beforeEach(() => {
+      vi.spyOn(core, 'getInput').mockImplementation(mocks.getInput(mocks.IAM_USER_INPUTS));
+      mockedSTSClient.on(GetCallerIdentityCommand).resolvesOnce({ ...mocks.outputs.GET_CALLER_IDENTITY });
+      // biome-ignore lint/suspicious/noExplicitAny: any required to mock private method
+      vi.spyOn(CredentialsClient.prototype as any, 'loadCredentials').mockResolvedValueOnce({
+        accessKeyId: 'MYAWSACCESSKEYID',
+      });
+    });
+
+    it('sets timeout when action-timeout-s is provided', async () => {
+      const setTimeoutSpy = vi.spyOn(global, 'setTimeout');
+      const clearTimeoutSpy = vi.spyOn(global, 'clearTimeout');
+      const infoSpy = vi.spyOn(core, 'info');
+      vi.spyOn(core, 'getInput').mockImplementation(
+        mocks.getInput({
+          ...mocks.IAM_USER_INPUTS,
+          'action-timeout-s': '30',
+        }),
+      );
+
+      await run();
+
+      expect(infoSpy).toHaveBeenCalledWith('Setting a global timeout of 30 seconds for the action');
+      expect(setTimeoutSpy).toHaveBeenCalledWith(expect.any(Function), 30000);
+      expect(clearTimeoutSpy).toHaveBeenCalledWith(expect.any(Object));
+      expect(core.setFailed).not.toHaveBeenCalled();
+    });
+
+    it('does not set timeout when action-timeout-s is 0', async () => {
+      const setTimeoutSpy = vi.spyOn(global, 'setTimeout');
+      const infoSpy = vi.spyOn(core, 'info');
+      vi.spyOn(core, 'getInput').mockImplementation(
+        mocks.getInput({
+          ...mocks.IAM_USER_INPUTS,
+          'action-timeout-s': '0',
+        }),
+      );
+
+      await run();
+
+      expect(infoSpy).not.toHaveBeenCalledWith(expect.stringContaining('Setting a global timeout'));
+      expect(setTimeoutSpy).not.toHaveBeenCalled();
+      expect(core.setFailed).not.toHaveBeenCalled();
+    });
+
+    it('does not set timeout when action-timeout-s is not provided', async () => {
+      const setTimeoutSpy = vi.spyOn(global, 'setTimeout');
+      const infoSpy = vi.spyOn(core, 'info');
+
+      await run();
+
+      expect(infoSpy).not.toHaveBeenCalledWith(expect.stringContaining('Setting a global timeout'));
+      expect(setTimeoutSpy).not.toHaveBeenCalled();
+      expect(core.setFailed).not.toHaveBeenCalled();
+    });
+
+    it('timeout callback calls setFailed and exits process', async () => {
+      const setTimeoutSpy = vi.spyOn(global, 'setTimeout');
+      const processExitSpy = vi.spyOn(process, 'exit').mockImplementation(() => undefined as never);
+      vi.spyOn(core, 'getInput').mockImplementation(
+        mocks.getInput({
+          ...mocks.IAM_USER_INPUTS,
+          'action-timeout-s': '5',
+        }),
+      );
+
+      await run();
+
+      // Get the timeout callback function
+      const timeoutCallback = setTimeoutSpy.mock.calls[0][0] as () => void;
+      
+      // Execute the timeout callback
+      timeoutCallback();
+
+      expect(core.setFailed).toHaveBeenCalledWith('Action timed out after 5 seconds');
+      expect(processExitSpy).toHaveBeenCalledWith(1);
+    });
+  });
+
+  describe('HTTP Proxy Configuration', {}, () => {
+    beforeEach(() => {
+      vi.spyOn(core, 'getInput').mockImplementation(mocks.getInput(mocks.GH_OIDC_INPUTS));
+      vi.spyOn(core, 'getIDToken').mockResolvedValue('testoidctoken');
+      mockedSTSClient.on(GetCallerIdentityCommand).resolvesOnce({ ...mocks.outputs.GET_CALLER_IDENTITY });
+      mockedSTSClient.on(AssumeRoleWithWebIdentityCommand).resolvesOnce(mocks.outputs.STS_CREDENTIALS);
+      process.env.ACTIONS_ID_TOKEN_REQUEST_TOKEN = 'fake-token';
+    });
+
+    it('configures proxy from http-proxy input', async () => {
+      const infoSpy = vi.spyOn(core, 'info');
+      vi.spyOn(core, 'getInput').mockImplementation(
+        mocks.getInput({
+          ...mocks.GH_OIDC_INPUTS,
+          'http-proxy': 'http://proxy.example.com:8080',
+        }),
+      );
+
+      await run();
+
+      expect(infoSpy).toHaveBeenCalledWith('Configuring proxy handler for STS client');
+      expect(core.setFailed).not.toHaveBeenCalled();
+    });
+
+    it('configures proxy from HTTP_PROXY environment variable', async () => {
+      const infoSpy = vi.spyOn(core, 'info');
+      process.env.HTTP_PROXY = 'http://proxy.example.com:8080';
+
+      await run();
+
+      expect(infoSpy).toHaveBeenCalledWith('Configuring proxy handler for STS client');
+      expect(core.setFailed).not.toHaveBeenCalled();
+    });
+
+    it('configures proxy from HTTPS_PROXY environment variable', async () => {
+      const infoSpy = vi.spyOn(core, 'info');
+      process.env.HTTPS_PROXY = 'https://proxy.example.com:8080';
+
+      await run();
+
+      expect(infoSpy).toHaveBeenCalledWith('Configuring proxy handler for STS client');
+      expect(core.setFailed).not.toHaveBeenCalled();
+    });
+
+    it('prioritizes http-proxy input over environment variables', async () => {
+      const infoSpy = vi.spyOn(core, 'info');
+      process.env.HTTP_PROXY = 'http://env-proxy.example.com:8080';
+      vi.spyOn(core, 'getInput').mockImplementation(
+        mocks.getInput({
+          ...mocks.GH_OIDC_INPUTS,
+          'http-proxy': 'http://input-proxy.example.com:8080',
+        }),
+      );
+
+      await run();
+
+      expect(infoSpy).toHaveBeenCalledWith('Configuring proxy handler for STS client');
+      expect(core.setFailed).not.toHaveBeenCalled();
+    });
+
+    it('properly configures proxy agent in STS client', async () => {
+      const infoSpy = vi.spyOn(core, 'info');
+
+      vi.spyOn(core, 'getInput').mockImplementation(
+        mocks.getInput({
+          ...mocks.GH_OIDC_INPUTS,
+          'http-proxy': 'http://proxy.example.com:8080',
+        }),
+      );
+
+      await run();
+
+      expect(infoSpy).toHaveBeenCalledWith('Configuring proxy handler for STS client');
+      expect(core.setFailed).not.toHaveBeenCalled();
+    });
+
+    it('configures no-proxy setting', async () => {
+      vi.spyOn(core, 'getInput').mockImplementation(
+        mocks.getInput({
+          ...mocks.GH_OIDC_INPUTS,
+          'http-proxy': 'http://proxy.example.com:8080',
+          'no-proxy': 'localhost,127.0.0.1',
+        }),
+      );
+
+      await run();
+
+      expect(core.setFailed).not.toHaveBeenCalled();
+    });
+
+    it('works without proxy configuration', async () => {
+      await run();
+
+      expect(core.setFailed).not.toHaveBeenCalled();
+    });
+  });
+
+  describe('AWS Profile Support', {}, () => {
+    beforeEach(() => {
+      vi.clearAllMocks();
+      mockedSTSClient.reset();
+      vi.mock('node:fs');
+      vol.reset();
+    });
+
+    it('writes profile files with OIDC authentication', async () => {
+      vi.spyOn(core, 'getInput').mockImplementation(
+        mocks.getInput({
+          ...mocks.GH_OIDC_INPUTS,
+          'aws-profile': 'dev',
+        }),
+      );
+      vi.spyOn(core, 'getIDToken').mockResolvedValue('testoidctoken');
+      mockedSTSClient.on(AssumeRoleWithWebIdentityCommand).resolves(mocks.outputs.STS_CREDENTIALS);
+      mockedSTSClient.on(GetCallerIdentityCommand).resolves({ ...mocks.outputs.GET_CALLER_IDENTITY });
+      process.env.ACTIONS_ID_TOKEN_REQUEST_TOKEN = 'fake-token';
+
+      await run();
+
+      // Verify credentials were NOT exported to environment variables
+      expect(core.exportVariable).not.toHaveBeenCalledWith('AWS_ACCESS_KEY_ID', expect.anything());
+      expect(core.exportVariable).not.toHaveBeenCalledWith('AWS_SECRET_ACCESS_KEY', expect.anything());
+      expect(core.exportVariable).not.toHaveBeenCalledWith('AWS_SESSION_TOKEN', expect.anything());
+      expect(core.exportVariable).not.toHaveBeenCalledWith('AWS_PROFILE', expect.anything());
+      expect(core.exportVariable).not.toHaveBeenCalledWith('AWS_REGION', expect.anything());
+      expect(core.exportVariable).not.toHaveBeenCalledWith('AWS_DEFAULT_REGION', expect.anything());
+
+      // Verify profile files were written
+      expect(core.info).toHaveBeenCalledWith('Writing credentials to profile: dev');
+      expect(core.info).toHaveBeenCalledWith('Writing config to profile: dev');
+      expect(core.info).toHaveBeenCalledWith('✓ Successfully configured AWS profile: dev');
+      expect(core.setFailed).not.toHaveBeenCalled();
+    });
+
+    it('writes profile files with IAM user credentials', async () => {
+      vi.spyOn(core, 'getInput').mockImplementation(
+        mocks.getInput({
+          ...mocks.IAM_USER_INPUTS,
+          'aws-profile': 'production',
+        }),
+      );
+      mockedSTSClient.on(GetCallerIdentityCommand).resolves({ ...mocks.outputs.GET_CALLER_IDENTITY });
+      // biome-ignore lint/suspicious/noExplicitAny: any required to mock private method
+      vi.spyOn(CredentialsClient.prototype as any, 'loadCredentials').mockResolvedValue({
+        accessKeyId: 'MYAWSACCESSKEYID',
+      });
+
+      await run();
+
+      // Verify credentials were NOT exported to environment variables
+      expect(core.exportVariable).not.toHaveBeenCalledWith('AWS_ACCESS_KEY_ID', expect.anything());
+      expect(core.exportVariable).not.toHaveBeenCalledWith('AWS_SECRET_ACCESS_KEY', expect.anything());
+      expect(core.exportVariable).not.toHaveBeenCalledWith('AWS_SESSION_TOKEN', expect.anything());
+      expect(core.exportVariable).not.toHaveBeenCalledWith('AWS_PROFILE', expect.anything());
+      expect(core.exportVariable).not.toHaveBeenCalledWith('AWS_REGION', expect.anything());
+      expect(core.exportVariable).not.toHaveBeenCalledWith('AWS_DEFAULT_REGION', expect.anything());
+
+      // Verify profile files were written
+      expect(core.info).toHaveBeenCalledWith('Writing credentials to profile: production');
+      expect(core.info).toHaveBeenCalledWith('Writing config to profile: production');
+      expect(core.info).toHaveBeenCalledWith('✓ Successfully configured AWS profile: production');
+      expect(core.setFailed).not.toHaveBeenCalled();
+    });
+
+    it('writes profile files with IAM user role assumption', async () => {
+      vi.spyOn(core, 'getInput').mockImplementation(
+        mocks.getInput({
+          ...mocks.IAM_ASSUMEROLE_INPUTS,
+          'aws-profile': 'assumed-role',
+        }),
+      );
+      mockedSTSClient.on(AssumeRoleCommand).resolves(mocks.outputs.STS_CREDENTIALS);
+      mockedSTSClient.on(GetCallerIdentityCommand).resolves({ ...mocks.outputs.GET_CALLER_IDENTITY });
+      // biome-ignore lint/suspicious/noExplicitAny: any required to mock private method
+      vi.spyOn(CredentialsClient.prototype as any, 'loadCredentials')
+        .mockResolvedValueOnce({ accessKeyId: 'MYAWSACCESSKEYID' })
+        .mockResolvedValueOnce({ accessKeyId: 'STSAWSACCESSKEYID' });
+
+      vi.spyOn(profileManager, 'writeProfileFiles');
+      await run();
+
+      // Verify credentials were NOT exported to environment variables
+      expect(core.exportVariable).not.toHaveBeenCalledWith('AWS_ACCESS_KEY_ID', expect.anything());
+      expect(core.exportVariable).not.toHaveBeenCalledWith('AWS_SECRET_ACCESS_KEY', expect.anything());
+      expect(core.exportVariable).not.toHaveBeenCalledWith('AWS_SESSION_TOKEN', expect.anything());
+      expect(core.exportVariable).not.toHaveBeenCalledWith('AWS_PROFILE', expect.anything());
+      expect(core.exportVariable).not.toHaveBeenCalledWith('AWS_REGION', expect.anything());
+      expect(core.exportVariable).not.toHaveBeenCalledWith('AWS_DEFAULT_REGION', expect.anything());
+
+      // Verify profile files were written
+      expect(core.info).toHaveBeenCalledWith('Writing credentials to profile: assumed-role');
+      expect(core.info).toHaveBeenCalledWith('Writing config to profile: assumed-role');
+      expect(core.info).toHaveBeenCalledWith('✓ Successfully configured AWS profile: assumed-role');
+
+      // Verify profile files were written twice (first to write access key id and access key, second to write
+      // actual session token after role assumption
+      expect(profileManager.writeProfileFiles).toHaveBeenCalledTimes(2);
+
+      expect(core.setFailed).not.toHaveBeenCalled();
+    });
+
+    it('respects output-env-credentials=true with profiles', async () => {
+      vi.spyOn(core, 'getInput').mockImplementation(
+        mocks.getInput({
+          ...mocks.GH_OIDC_INPUTS,
+          'aws-profile': 'dev',
+          'output-env-credentials': 'true',
+        }),
+      );
+      vi.spyOn(core, 'getIDToken').mockResolvedValue('testoidctoken');
+      mockedSTSClient.on(AssumeRoleWithWebIdentityCommand).resolves(mocks.outputs.STS_CREDENTIALS);
+      mockedSTSClient.on(GetCallerIdentityCommand).resolves({ ...mocks.outputs.GET_CALLER_IDENTITY });
+      process.env.ACTIONS_ID_TOKEN_REQUEST_TOKEN = 'fake-token';
+
+      await run();
+
+      // verify that env vars were exported
+      expect(core.exportVariable).toHaveBeenCalledWith('AWS_ACCESS_KEY_ID', 'STSAWSACCESSKEYID');
+      expect(core.exportVariable).toHaveBeenCalledWith('AWS_SECRET_ACCESS_KEY', 'STSAWSSECRETACCESSKEY');
+      expect(core.exportVariable).toHaveBeenCalledWith('AWS_SESSION_TOKEN', 'STSAWSSESSIONTOKEN');
+      expect(core.exportVariable).toHaveBeenCalledWith('AWS_PROFILE', 'dev');
+      expect(core.exportVariable).toHaveBeenCalledWith('AWS_REGION', 'fake-region-1');
+      expect(core.exportVariable).toHaveBeenCalledWith('AWS_DEFAULT_REGION', 'fake-region-1');
+
+      // Verify profile files were still written
+      expect(core.info).toHaveBeenCalledWith('Writing credentials to profile: dev');
+      expect(core.info).toHaveBeenCalledWith('Writing config to profile: dev');
+      expect(core.info).toHaveBeenCalledWith('✓ Successfully configured AWS profile: dev');
+      expect(core.setFailed).not.toHaveBeenCalled();
+    });
+
+    it('maintains backward compatibility when aws-profile is not specified', async () => {
+      vi.spyOn(core, 'getInput').mockImplementation(mocks.getInput(mocks.GH_OIDC_INPUTS));
+      vi.spyOn(core, 'getIDToken').mockResolvedValue('testoidctoken');
+      mockedSTSClient.on(AssumeRoleWithWebIdentityCommand).resolves(mocks.outputs.STS_CREDENTIALS);
+      mockedSTSClient.on(GetCallerIdentityCommand).resolves({ ...mocks.outputs.GET_CALLER_IDENTITY });
+      process.env.ACTIONS_ID_TOKEN_REQUEST_TOKEN = 'fake-token';
+
+      await run();
+
+      // Verify credentials WERE exported to environment variables (backward compatibility)
+      expect(core.exportVariable).toHaveBeenCalledWith('AWS_ACCESS_KEY_ID', 'STSAWSACCESSKEYID');
+      expect(core.exportVariable).toHaveBeenCalledWith('AWS_SECRET_ACCESS_KEY', 'STSAWSSECRETACCESSKEY');
+      expect(core.exportVariable).toHaveBeenCalledWith('AWS_SESSION_TOKEN', 'STSAWSSESSIONTOKEN');
+      expect(core.exportVariable).toHaveBeenCalledWith('AWS_REGION', 'fake-region-1');
+      expect(core.exportVariable).toHaveBeenCalledWith('AWS_DEFAULT_REGION', 'fake-region-1');
+
+      // Verify AWS_PROFILE was NOT exported
+      expect(core.exportVariable).not.toHaveBeenCalledWith('AWS_PROFILE', expect.anything());
+
+      // Verify profile files were NOT written
+      expect(core.info).not.toHaveBeenCalledWith(expect.stringContaining('Writing credentials to profile'));
+      expect(core.info).not.toHaveBeenCalledWith(expect.stringContaining('✓ Successfully configured AWS profile:'));
+      expect(core.setFailed).not.toHaveBeenCalled();
+    });
+
+    it('handles default profile correctly', async () => {
+      vi.spyOn(core, 'getInput').mockImplementation(
+        mocks.getInput({
+          ...mocks.GH_OIDC_INPUTS,
+          'aws-profile': 'default',
+        }),
+      );
+      vi.spyOn(core, 'getIDToken').mockResolvedValue('testoidctoken');
+      mockedSTSClient.on(AssumeRoleWithWebIdentityCommand).resolves(mocks.outputs.STS_CREDENTIALS);
+      mockedSTSClient.on(GetCallerIdentityCommand).resolves({ ...mocks.outputs.GET_CALLER_IDENTITY });
+      process.env.ACTIONS_ID_TOKEN_REQUEST_TOKEN = 'fake-token';
+
+      await run();
+
+      // Verify profile files were written for 'default' profile
+      expect(core.info).toHaveBeenCalledWith('Writing credentials to profile: default');
+      expect(core.info).toHaveBeenCalledWith('Writing config to profile: default');
+      expect(core.info).toHaveBeenCalledWith('✓ Successfully configured AWS profile: default');
+      expect(core.setFailed).not.toHaveBeenCalled();
+    });
+
+    it('rejects invalid profile names with whitespace', async () => {
+      vi.spyOn(core, 'getInput').mockImplementation(
+        mocks.getInput({
+          ...mocks.GH_OIDC_INPUTS,
+          'aws-profile': 'invalid profile',
+        }),
+      );
+      vi.spyOn(core, 'getIDToken').mockResolvedValue('testoidctoken');
+      mockedSTSClient.on(AssumeRoleWithWebIdentityCommand).resolves(mocks.outputs.STS_CREDENTIALS);
+      mockedSTSClient.on(GetCallerIdentityCommand).resolves({ ...mocks.outputs.GET_CALLER_IDENTITY });
+      process.env.ACTIONS_ID_TOKEN_REQUEST_TOKEN = 'fake-token';
+
+      await run();
+
+      expect(core.setFailed).toHaveBeenCalledWith(expect.stringContaining('whitespace'));
+    });
   });
 });

test/mockinputs.test.ts

@@ -31,7 +31,18 @@ const inputs = {
     'aws-region': 'fake-region-1',
     'use-existing-credentials': 'true',
     'role-to-assume': 'arn:aws:iam::111111111111:role/MY-ROLE',
-  }
+  },
+  NO_ENV_CREDS_INPUTS: {
+    'role-to-assume': 'arn:aws:iam::111111111111:role/MY-ROLE',
+    'aws-region': 'fake-region-1',
+    'output-env-credentials': 'false',
+  },
+  STEP_BUT_NO_ENV_INPUTS: {
+    'role-to-assume': 'arn:aws:iam::111111111111:role/MY-ROLE',
+    'aws-region': 'fake-region-1',
+    'output-env-credentials': 'false',
+    'output-credentials': 'true',
+  },
 };
 
 const envs = {

test/profileManager.test.ts

@@ -0,0 +1,724 @@
+import * as core from '@actions/core';
+import { fs, vol } from 'memfs';
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+import {
+  ensureAwsDirectoryExists,
+  getProfileFilePaths,
+  mergeProfileSection,
+  parseIni,
+  stringifyIni,
+  validateProfileName,
+  writeProfileFiles,
+} from '../src/profileManager';
+
+describe('Profile Manager', {}, () => {
+  beforeEach(() => {
+    vi.restoreAllMocks();
+    vi.mock('node:fs');
+    vol.reset();
+    vi.spyOn(core, 'debug').mockImplementation(() => {});
+    vi.spyOn(core, 'info').mockImplementation(() => {});
+  });
+
+  describe('parseIni', {}, () => {
+    it('parses a single section', {}, () => {
+      const result = parseIni('[dev]\naws_access_key_id=AKIA\naws_secret_access_key=secret\n');
+      expect(result.dev).toEqual({ aws_access_key_id: 'AKIA', aws_secret_access_key: 'secret' });
+    });
+
+    it('parses multiple sections', {}, () => {
+      const result = parseIni('[dev]\nkey=dev_val\n\n[prod]\nkey=prod_val\n');
+      expect(result.dev.key).toBe('dev_val');
+      expect(result.prod.key).toBe('prod_val');
+    });
+
+    it('skips comments and empty lines', {}, () => {
+      const result = parseIni('# comment\n; another comment\n\n[dev]\nkey=val\n');
+      expect(result.dev).toEqual({ key: 'val' });
+    });
+
+    it('trims whitespace around keys and values', {}, () => {
+      const result = parseIni('[dev]\n  key  =  val  \n');
+      expect(result.dev.key).toBe('val');
+    });
+
+    it('preserves section names with spaces (e.g. profile prefix)', {}, () => {
+      const result = parseIni('[profile dev]\nregion=us-east-1\n');
+      expect(result['profile dev']).toEqual({ region: 'us-east-1' });
+    });
+
+    it('guards against __proto__ section pollution', {}, () => {
+      const result = parseIni('[__proto__]\npolluted=true\n[safe]\nkey=val\n');
+      expect(result.__proto__).not.toHaveProperty('polluted');
+      expect(result.safe).toEqual({ key: 'val' });
+    });
+
+    it('guards against __proto__ key pollution', {}, () => {
+      const result = parseIni('[dev]\n__proto__=evil\naws_access_key_id=AKIA\n');
+      expect(result.dev).toEqual({ aws_access_key_id: 'AKIA' });
+      expect(result.dev).not.toHaveProperty('__proto__', 'evil');
+    });
+
+    it('handles values containing equals signs', {}, () => {
+      const result = parseIni('[dev]\naws_session_token=FwoGZXIvYXdzEBYa/base64==\n');
+      expect(result.dev.aws_session_token).toBe('FwoGZXIvYXdzEBYa/base64==');
+    });
+
+    it('handles empty values', {}, () => {
+      const result = parseIni('[dev]\ncli_pager=\n');
+      expect(result.dev.cli_pager).toBe('');
+    });
+
+    it('returns empty object for empty input', {}, () => {
+      expect(parseIni('')).toEqual({});
+    });
+
+    it('returns empty object for whitespace-only input', {}, () => {
+      expect(parseIni('   \n\n  \n')).toEqual({});
+    });
+
+    it('handles Windows line endings (CRLF)', {}, () => {
+      const result = parseIni('[dev]\r\naws_access_key_id=AKIA\r\naws_secret_access_key=secret\r\n');
+      expect(result.dev).toEqual({ aws_access_key_id: 'AKIA', aws_secret_access_key: 'secret' });
+    });
+  });
+
+  describe('stringifyIni', {}, () => {
+    it('serializes a single section', {}, () => {
+      const result = stringifyIni({ dev: { key: 'val' } });
+      expect(result).toBe('[dev]\nkey = val\n');
+    });
+
+    it('serializes multiple sections with blank line separator', {}, () => {
+      const result = stringifyIni({ dev: { a: '1' }, prod: { b: '2' } });
+      expect(result).toBe('[dev]\na = 1\n\n[prod]\nb = 2\n');
+    });
+
+    it('round-trips through parseIni', {}, () => {
+      const data = { dev: { aws_access_key_id: 'AKIA', aws_secret_access_key: 'secret' }, 'profile prod': { region: 'us-west-2' } };
+      const roundTripped = parseIni(stringifyIni(data));
+      expect(roundTripped).toEqual(data);
+    });
+
+    it('handles empty data object', {}, () => {
+      const result = stringifyIni({});
+      expect(result).toBe('\n');
+      expect(parseIni(result)).toEqual({});
+    });
+
+    it('handles section with no keys', {}, () => {
+      const result = stringifyIni({ dev: {} });
+      expect(result).toBe('[dev]\n');
+    });
+  });
+
+  describe('validateProfileName', {}, () => {
+    it('accepts valid profile names', {}, () => {
+      expect(() => validateProfileName('dev')).not.toThrow();
+      expect(() => validateProfileName('production')).not.toThrow();
+      expect(() => validateProfileName('my-profile-123')).not.toThrow();
+      expect(() => validateProfileName('default')).not.toThrow();
+    });
+
+    it('rejects empty profile names', {}, () => {
+      expect(() => validateProfileName('')).toThrow('aws-profile must not be empty');
+      expect(() => validateProfileName('   ')).toThrow('aws-profile must not be empty');
+    });
+
+    it('rejects profile names with whitespace', {}, () => {
+      expect(() => validateProfileName('my profile')).toThrow('aws-profile must not contain whitespace');
+      expect(() => validateProfileName('dev\ntest')).toThrow('aws-profile must not contain whitespace');
+      expect(() => validateProfileName('prod\tenv')).toThrow('aws-profile must not contain whitespace');
+    });
+
+    it('rejects profile names with brackets', {}, () => {
+      expect(() => validateProfileName('dev[test]')).toThrow('aws-profile must not contain brackets');
+      expect(() => validateProfileName('[profile]')).toThrow('aws-profile must not contain brackets');
+    });
+
+    it('rejects profile names with path separators', {}, () => {
+      expect(() => validateProfileName('dev/test')).toThrow('aws-profile must not contain path separators');
+      expect(() => validateProfileName('dev\\test')).toThrow('aws-profile must not contain path separators');
+      expect(() => validateProfileName('../etc/passwd')).toThrow('aws-profile must not contain path separators');
+    });
+  });
+
+  describe('getProfileFilePaths', {}, () => {
+    it('returns default paths when env vars not set', {}, () => {
+      delete process.env.AWS_SHARED_CREDENTIALS_FILE;
+      delete process.env.AWS_CONFIG_FILE;
+
+      const paths = getProfileFilePaths();
+
+      expect(paths.credentials).toMatch(/\.aws[/\\]credentials$/);
+      expect(paths.config).toMatch(/\.aws[/\\]config$/);
+    });
+
+    it('respects AWS_SHARED_CREDENTIALS_FILE env var', {}, () => {
+      process.env.AWS_SHARED_CREDENTIALS_FILE = '/custom/path/credentials';
+      process.env.AWS_CONFIG_FILE = '/custom/path/config';
+
+      const paths = getProfileFilePaths();
+
+      expect(paths.credentials).toBe('/custom/path/credentials');
+      expect(paths.config).toBe('/custom/path/config');
+    });
+  });
+
+  describe('ensureAwsDirectoryExists', {}, () => {
+    it('creates directory if it does not exist', {}, () => {
+      const filePath = '/home/runner/.aws/credentials';
+
+      ensureAwsDirectoryExists(filePath);
+
+      expect(fs.existsSync('/home/runner/.aws')).toBe(true);
+    });
+
+    it('does not error if directory already exists', {}, () => {
+      const filePath = '/home/runner/.aws/credentials';
+
+      fs.mkdirSync('/home/runner/.aws', { recursive: true });
+
+      expect(() => ensureAwsDirectoryExists(filePath)).not.toThrow();
+    });
+
+    it('creates nested directories', {}, () => {
+      const filePath = '/home/runner/custom/path/.aws/credentials';
+
+      ensureAwsDirectoryExists(filePath);
+
+      expect(fs.existsSync('/home/runner/custom/path/.aws')).toBe(true);
+    });
+  });
+
+  describe('mergeProfileSection', {}, () => {
+    it('creates new file with profile section', {}, () => {
+      const filePath = '/home/runner/.aws/credentials';
+      fs.mkdirSync('/home/runner/.aws', { recursive: true });
+
+      mergeProfileSection(filePath, 'dev', {
+        aws_access_key_id: 'AKIAIOSFODNN7EXAMPLE',
+        aws_secret_access_key: 'wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY',
+      }, false);
+
+      const content = fs.readFileSync(filePath, 'utf-8');
+      const parsed = parseIni(content);
+
+      expect(parsed.dev).toBeDefined();
+      expect(parsed.dev.aws_access_key_id).toBe('AKIAIOSFODNN7EXAMPLE');
+      expect(parsed.dev.aws_secret_access_key).toBe('wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY');
+    });
+
+    it('merges with existing profiles', {}, () => {
+      const filePath = '/home/runner/.aws/credentials';
+      fs.mkdirSync('/home/runner/.aws', { recursive: true });
+
+      // Create initial profile
+      mergeProfileSection(filePath, 'dev', {
+        aws_access_key_id: 'AKIAIOSFODNN7EXAMPLE',
+        aws_secret_access_key: 'devSecretKey',
+      }, false);
+
+      // Add second profile
+      mergeProfileSection(filePath, 'prod', {
+        aws_access_key_id: 'AKIAPRODEXAMPLE',
+        aws_secret_access_key: 'prodSecretKey',
+      }, false);
+
+      const content = fs.readFileSync(filePath, 'utf-8');
+      const parsed = parseIni(content);
+
+      expect(parsed.dev).toBeDefined();
+      expect(parsed.dev.aws_access_key_id).toBe('AKIAIOSFODNN7EXAMPLE');
+      expect(parsed.prod).toBeDefined();
+      expect(parsed.prod.aws_access_key_id).toBe('AKIAPRODEXAMPLE');
+    });
+
+    it('overwrites existing profile with same name', {}, () => {
+      const filePath = '/home/runner/.aws/credentials';
+      fs.mkdirSync('/home/runner/.aws', { recursive: true });
+
+      // Create initial profile
+      mergeProfileSection(filePath, 'dev', {
+        aws_access_key_id: 'OLD_KEY',
+        aws_secret_access_key: 'oldSecretKey',
+        aws_session_token: 'oldSessionToken'
+      }, false);
+
+      // Overwrite with new credentials
+      mergeProfileSection(filePath, 'dev', {
+        aws_access_key_id: 'NEW_KEY',
+        aws_secret_access_key: 'newSecretKey',
+        aws_session_token: 'newSessionToken',
+      }, true);
+
+      const content = fs.readFileSync(filePath, 'utf-8');
+      const parsed = parseIni(content);
+
+      expect(parsed.dev.aws_access_key_id).toBe('NEW_KEY');
+      expect(parsed.dev.aws_secret_access_key).toBe('newSecretKey');
+      expect(parsed.dev.aws_session_token).toBe('newSessionToken');
+    });
+
+    it('overwriting a profile removes stale keys', {}, () => {
+      const filePath = '/home/runner/.aws/credentials';
+      fs.mkdirSync('/home/runner/.aws', { recursive: true });
+
+      // Create profile with session token
+      mergeProfileSection(filePath, 'dev', {
+        aws_access_key_id: 'AKIA',
+        aws_secret_access_key: 'secret',
+        aws_session_token: 'old-token',
+      }, false);
+
+      // Overwrite without session token
+      mergeProfileSection(filePath, 'dev', {
+        aws_access_key_id: 'AKIA2',
+        aws_secret_access_key: 'secret2',
+      }, true);
+
+      const content = fs.readFileSync(filePath, 'utf-8');
+      const parsed = parseIni(content);
+
+      expect(parsed.dev.aws_access_key_id).toBe('AKIA2');
+      expect(parsed.dev.aws_secret_access_key).toBe('secret2');
+      expect(parsed.dev.aws_session_token).toBeUndefined();
+    });
+
+    it('handles empty existing file', {}, () => {
+      const filePath = '/home/runner/.aws/credentials';
+      fs.mkdirSync('/home/runner/.aws', { recursive: true });
+      fs.writeFileSync(filePath, '', { mode: 0o600 });
+
+      mergeProfileSection(filePath, 'dev', {
+        aws_access_key_id: 'AKIA',
+        aws_secret_access_key: 'secret',
+      }, false);
+
+      const content = fs.readFileSync(filePath, 'utf-8');
+      const parsed = parseIni(content);
+
+      expect(parsed.dev.aws_access_key_id).toBe('AKIA');
+      expect(parsed.dev.aws_secret_access_key).toBe('secret');
+    });
+
+    it('errors if profile name already exists but overwrite flag is false', {}, () => {
+      const filePath = '/home/runner/.aws/credentials';
+      fs.mkdirSync('/home/runner/.aws', { recursive: true });
+
+      // Create initial profile
+      mergeProfileSection(filePath, 'dev', {
+        aws_access_key_id: 'OLD_KEY',
+        aws_secret_access_key: 'oldSecretKey',
+      }, false);
+
+      // Overwrite with new credentials
+      expect(() => mergeProfileSection(filePath, 'dev', {
+        aws_access_key_id: 'NEW_KEY',
+        aws_secret_access_key: 'newSecretKey',
+        aws_session_token: 'sessionToken',
+      }, false)).toThrow(`Profile with name "dev" already exists. Please use the overwrite-aws-profile input if you want to overwrite existing profiles.`);
+
+      const content = fs.readFileSync(filePath, 'utf-8');
+      const parsed = parseIni(content);
+
+      expect(parsed.dev.aws_access_key_id).toBe('OLD_KEY');
+      expect(parsed.dev.aws_secret_access_key).toBe('oldSecretKey');
+      expect(parsed.dev.aws_session_token).toBeUndefined();
+    });
+  });
+
+  describe('writeProfileFiles', {}, () => {
+    beforeEach(() => {
+      delete process.env.AWS_SHARED_CREDENTIALS_FILE;
+      delete process.env.AWS_CONFIG_FILE;
+    });
+
+    it('writes credentials and config for new profile', {}, () => {
+      writeProfileFiles(
+        'dev',
+        {
+          AccessKeyId: 'AKIAIOSFODNN7EXAMPLE',
+          SecretAccessKey: 'wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY',
+          SessionToken: 'FwoGZXIvYXdzEBYaDEXAMPLE',
+        },
+        'us-east-1',
+        false,
+      );
+
+      // Check credentials file
+      const credsPath = getProfileFilePaths().credentials;
+      const credContent = fs.readFileSync(credsPath, 'utf-8');
+      const credParsed = parseIni(credContent);
+
+      expect(credParsed.dev).toBeDefined();
+      expect(credParsed.dev.aws_access_key_id).toBe('AKIAIOSFODNN7EXAMPLE');
+      expect(credParsed.dev.aws_secret_access_key).toBe('wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY');
+      expect(credParsed.dev.aws_session_token).toBe('FwoGZXIvYXdzEBYaDEXAMPLE');
+
+      // Check config file
+      const configPath = getProfileFilePaths().config;
+      const configContent = fs.readFileSync(configPath, 'utf-8');
+      const configParsed = parseIni(configContent);
+
+      expect(configParsed['profile dev']).toBeDefined();
+      expect(configParsed['profile dev'].region).toBe('us-east-1');
+    });
+
+    it('uses correct section naming for default profile', {}, () => {
+      writeProfileFiles(
+        'default',
+        {
+          AccessKeyId: 'AKIAIOSFODNN7EXAMPLE',
+          SecretAccessKey: 'wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY',
+        },
+        'us-west-2',
+        false,
+      );
+
+      // Check credentials file uses [default]
+      const credsPath = getProfileFilePaths().credentials;
+      const credContent = fs.readFileSync(credsPath, 'utf-8');
+      const credParsed = parseIni(credContent);
+
+      expect(credParsed.default).toBeDefined();
+      expect(credParsed['profile default']).toBeUndefined();
+
+      // Check config file uses [default] (not [profile default])
+      const configPath = getProfileFilePaths().config;
+      const configContent = fs.readFileSync(configPath, 'utf-8');
+      const configParsed = parseIni(configContent);
+
+      expect(configParsed.default).toBeDefined();
+      expect(configParsed['profile default']).toBeUndefined();
+    });
+
+    it('supports multiple profiles', {}, () => {
+      // Write first profile
+      writeProfileFiles(
+        'dev',
+        {
+          AccessKeyId: 'AKIADEV',
+          SecretAccessKey: 'devSecret',
+        },
+        'us-east-1',
+        false,
+      );
+
+      // Write second profile
+      writeProfileFiles(
+        'prod',
+        {
+          AccessKeyId: 'AKIAPROD',
+          SecretAccessKey: 'prodSecret',
+          SessionToken: 'prodToken',
+        },
+        'us-west-2',
+        false,
+      );
+
+      // Verify both profiles exist
+      const credsPath = getProfileFilePaths().credentials;
+      const credContent = fs.readFileSync(credsPath, 'utf-8');
+      const credParsed = parseIni(credContent);
+
+      expect(credParsed.dev).toBeDefined();
+      expect(credParsed.prod).toBeDefined();
+      expect(credParsed.dev.aws_access_key_id).toBe('AKIADEV');
+      expect(credParsed.prod.aws_access_key_id).toBe('AKIAPROD');
+    });
+
+    it('handles credentials without session token', {}, () => {
+      writeProfileFiles(
+        'dev',
+        {
+          AccessKeyId: 'AKIAIOSFODNN7EXAMPLE',
+          SecretAccessKey: 'wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY',
+        },
+        'us-east-1',
+        false,
+      );
+
+      const credsPath = getProfileFilePaths().credentials;
+      const credContent = fs.readFileSync(credsPath, 'utf-8');
+      const credParsed = parseIni(credContent);
+
+      expect(credParsed.dev.aws_access_key_id).toBe('AKIAIOSFODNN7EXAMPLE');
+      expect(credParsed.dev.aws_secret_access_key).toBe('wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY');
+      expect(credParsed.dev.aws_session_token).toBeUndefined();
+    });
+
+    it('throws error for invalid profile name', {}, () => {
+      expect(() =>
+        writeProfileFiles(
+          'invalid profile',
+          {
+            AccessKeyId: 'AKIA',
+            SecretAccessKey: 'secret',
+          },
+          'us-east-1',
+          false,
+        ),
+      ).toThrow('Failed to write AWS profile');
+      expect(() =>
+        writeProfileFiles(
+          'invalid profile',
+          {
+            AccessKeyId: 'AKIA',
+            SecretAccessKey: 'secret',
+          },
+          'us-east-1',
+          false
+        ),
+      ).toThrow('whitespace');
+    });
+
+    it('respects custom file paths from env vars', {}, () => {
+      process.env.AWS_SHARED_CREDENTIALS_FILE = '/custom/credentials';
+      process.env.AWS_CONFIG_FILE = '/custom/config';
+
+      fs.mkdirSync('/custom', { recursive: true });
+
+      writeProfileFiles(
+        'dev',
+        {
+          AccessKeyId: 'AKIA',
+          SecretAccessKey: 'secret',
+        },
+        'us-east-1',
+        false
+      );
+
+      expect(fs.existsSync('/custom/credentials')).toBe(true);
+      expect(fs.existsSync('/custom/config')).toBe(true);
+    });
+
+    it('logs info messages', {}, () => {
+      writeProfileFiles(
+        'dev',
+        {
+          AccessKeyId: 'AKIA',
+          SecretAccessKey: 'secret',
+        },
+        'us-east-1',
+        false
+      );
+
+      expect(core.info).toHaveBeenCalledWith('Writing credentials to profile: dev');
+      expect(core.info).toHaveBeenCalledWith('Writing config to profile: dev');
+      expect(core.info).toHaveBeenCalledWith('✓ Successfully configured AWS profile: dev');
+    });
+
+    it('preserves pre-existing unrelated profiles in credentials file', {}, () => {
+      const credsPath = getProfileFilePaths().credentials;
+      fs.mkdirSync(require('node:path').dirname(credsPath), { recursive: true });
+      fs.writeFileSync(
+        credsPath,
+        '[personal]\naws_access_key_id=AKIAPERSONAL\naws_secret_access_key=personalSecret\naws_session_token=personalToken\n',
+      );
+
+      writeProfileFiles(
+        'dev',
+        { AccessKeyId: 'AKIADEV', SecretAccessKey: 'devSecret' },
+        'us-east-1',
+        false,
+      );
+
+      const content = fs.readFileSync(credsPath, 'utf-8');
+      const parsed = parseIni(content);
+
+      // Pre-existing profile must be fully intact
+      expect(parsed.personal).toEqual({
+        aws_access_key_id: 'AKIAPERSONAL',
+        aws_secret_access_key: 'personalSecret',
+        aws_session_token: 'personalToken',
+      });
+      // New profile also present
+      expect(parsed.dev.aws_access_key_id).toBe('AKIADEV');
+    });
+
+    it('preserves pre-existing config with extra keys', {}, () => {
+      const configPath = getProfileFilePaths().config;
+      fs.mkdirSync(require('node:path').dirname(configPath), { recursive: true });
+      fs.writeFileSync(
+        configPath,
+        '[profile personal]\nregion=eu-west-1\noutput=json\ncli_pager=\n',
+      );
+
+      writeProfileFiles(
+        'dev',
+        { AccessKeyId: 'AKIA', SecretAccessKey: 'secret' },
+        'us-east-1',
+        false
+      );
+
+      const content = fs.readFileSync(configPath, 'utf-8');
+      const parsed = parseIni(content);
+
+      expect(parsed['profile personal']).toEqual({
+        region: 'eu-west-1',
+        output: 'json',
+        cli_pager: '',
+      });
+      expect(parsed['profile dev'].region).toBe('us-east-1');
+    });
+
+    it('preserves pre-existing default profile when writing a named profile', {}, () => {
+      const credsPath = getProfileFilePaths().credentials;
+      fs.mkdirSync(require('node:path').dirname(credsPath), { recursive: true });
+      fs.writeFileSync(
+        credsPath,
+        '[default]\naws_access_key_id=AKIADEFAULT\naws_secret_access_key=defaultSecret\n',
+      );
+
+      writeProfileFiles(
+        'dev',
+        { AccessKeyId: 'AKIADEV', SecretAccessKey: 'devSecret' },
+        'us-west-2',
+        false
+      );
+
+      const content = fs.readFileSync(credsPath, 'utf-8');
+      const parsed = parseIni(content);
+
+      expect(parsed.default).toEqual({
+        aws_access_key_id: 'AKIADEFAULT',
+        aws_secret_access_key: 'defaultSecret',
+      });
+      expect(parsed.dev.aws_access_key_id).toBe('AKIADEV');
+    });
+
+    it('comments in pre-existing files are stripped on round-trip', {}, () => {
+      const credsPath = getProfileFilePaths().credentials;
+      fs.mkdirSync(require('node:path').dirname(credsPath), { recursive: true });
+      fs.writeFileSync(
+        credsPath,
+        '# My important comment\n[personal]\naws_access_key_id=AKIA\naws_secret_access_key=secret\n',
+      );
+
+      writeProfileFiles(
+        'dev',
+        { AccessKeyId: 'AKIADEV', SecretAccessKey: 'devSecret' },
+        'us-east-1',
+        false
+      );
+
+      const content = fs.readFileSync(credsPath, 'utf-8') as string;
+
+      // Comment is lost (known trade-off), but profile data is preserved
+      expect(content).not.toContain('# My important comment');
+      const parsed = parseIni(content);
+      expect(parsed.personal.aws_access_key_id).toBe('AKIA');
+      expect(parsed.dev.aws_access_key_id).toBe('AKIADEV');
+    });
+
+    it('writes empty section when credentials object has no keys', {}, () => {
+      writeProfileFiles('dev', {}, 'us-east-1', false);
+
+      const credsPath = getProfileFilePaths().credentials;
+      const credContent = fs.readFileSync(credsPath, 'utf-8');
+      const credParsed = parseIni(credContent);
+
+      // Section exists but has no credential keys
+      expect(credParsed.dev).toEqual({});
+
+      // Config still gets region
+      const configPath = getProfileFilePaths().config;
+      const configContent = fs.readFileSync(configPath, 'utf-8');
+      const configParsed = parseIni(configContent);
+      expect(configParsed['profile dev'].region).toBe('us-east-1');
+    });
+
+    it('resolves credentials and config paths independently from env vars', {}, () => {
+      process.env.AWS_SHARED_CREDENTIALS_FILE = '/custom-creds/credentials';
+      // AWS_CONFIG_FILE is NOT set — should use default path
+
+      fs.mkdirSync('/custom-creds', { recursive: true });
+
+      writeProfileFiles(
+        'dev',
+        { AccessKeyId: 'AKIA', SecretAccessKey: 'secret' },
+        'us-east-1',
+        false
+      );
+
+      expect(fs.existsSync('/custom-creds/credentials')).toBe(true);
+      // Config file should be at the default path (under homedir)
+      const defaultConfigPath = require('node:path').join(require('node:os').homedir(), '.aws', 'config');
+      expect(fs.existsSync(defaultConfigPath)).toBe(true);
+    });
+
+    it('produces AWS CLI-compatible INI output (golden file)', {}, () => {
+      writeProfileFiles(
+        'dev',
+        {
+          AccessKeyId: 'AKIAIOSFODNN7EXAMPLE',
+          SecretAccessKey: 'wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY',
+          SessionToken: 'FwoGZXIvYXdzEBYaDEXAMPLE',
+        },
+        'us-east-1',
+        false
+      );
+
+      const credsPath = getProfileFilePaths().credentials;
+      const credContent = fs.readFileSync(credsPath, 'utf-8');
+
+      const configPath = getProfileFilePaths().config;
+      const configContent = fs.readFileSync(configPath, 'utf-8');
+
+      // Verify exact byte-for-byte format matching AWS CLI style:
+      // - [section] header on its own line
+      // - key = value with spaces around =
+      // - LF line endings, trailing newline
+      expect(credContent).toBe(
+        '[dev]\n' +
+        'aws_access_key_id = AKIAIOSFODNN7EXAMPLE\n' +
+        'aws_secret_access_key = wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY\n' +
+        'aws_session_token = FwoGZXIvYXdzEBYaDEXAMPLE\n',
+      );
+      expect(configContent).toBe(
+        '[profile dev]\n' +
+        'region = us-east-1\n',
+      );
+    });
+
+    it('golden file for multi-profile output', {}, () => {
+      writeProfileFiles(
+        'dev',
+        { AccessKeyId: 'AKIADEV', SecretAccessKey: 'devSecret' },
+        'us-east-1',
+        false
+      );
+      writeProfileFiles(
+        'prod',
+        { AccessKeyId: 'AKIAPROD', SecretAccessKey: 'prodSecret', SessionToken: 'prodToken' },
+        'us-west-2',
+        false
+      );
+
+      const credsPath = getProfileFilePaths().credentials;
+      const credContent = fs.readFileSync(credsPath, 'utf-8');
+
+      const configPath = getProfileFilePaths().config;
+      const configContent = fs.readFileSync(configPath, 'utf-8');
+
+      expect(credContent).toBe(
+        '[dev]\n' +
+        'aws_access_key_id = AKIADEV\n' +
+        'aws_secret_access_key = devSecret\n' +
+        '\n' +
+        '[prod]\n' +
+        'aws_access_key_id = AKIAPROD\n' +
+        'aws_secret_access_key = prodSecret\n' +
+        'aws_session_token = prodToken\n',
+      );
+      expect(configContent).toBe(
+        '[profile dev]\n' +
+        'region = us-east-1\n' +
+        '\n' +
+        '[profile prod]\n' +
+        'region = us-west-2\n',
+      );
+    });
+  });
+});

tsconfig.json

@@ -3,7 +3,7 @@
     "allowUnreachableCode": false,
     "allowUnusedLabels": false,
     "strict": true,
-    "exactOptionalPropertyTypes": false,
+    "exactOptionalPropertyTypes": true,
     "noFallthroughCasesInSwitch": true,
     "noImplicitOverride": true,
     "noImplicitReturns": true,
@@ -19,17 +19,13 @@
     "sourceMap": true,
     "disableSizeLimit": true,
     "forceConsistentCasingInFileNames": true,
-    "lib": [ "ES2020" ],
+    "lib": ["ES2020"],
     "target": "ES2020",
     "noErrorTruncation": true,
     "esModuleInterop": true,
     "rootDir": "src",
+    "skipLibCheck": true
   },
-  "include": [
-    "src/**/*.ts"
-  ],
-  "exclude": [
-    "test/**/*.ts"
-  ],
+  "include": ["src/**/*.ts"],
+  "exclude": ["test/**/*.ts"]
 }
-

tsconfig.test.json

@@ -1,11 +1,8 @@
 {
   "extends": "./tsconfig.json",
-  "include": [
-    "test/**/*.ts",
-    "src/**/*.ts"
-  ],
+  "include": ["test/**/*.ts", "src/**/*.ts"],
   "exclude": [],
   "compilerOptions": {
     "rootDir": "./"
-  },
+  }
 }