diff --git a/.github/workflows/_compile_integration_test.yml b/.github/workflows/_compile_integration_test.yml
index 7d0b366cbb..0df37f8b55 100644
--- a/.github/workflows/_compile_integration_test.yml
+++ b/.github/workflows/_compile_integration_test.yml
@@ -35,7 +35,7 @@ jobs:
     timeout-minutes: 20
     name: "Python ${{ inputs.python-version }}"
     steps:
-      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v6
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v6
 
       - name: "🐍 Set up Python ${{ inputs.python-version }} + UV"
         uses: "./.github/actions/uv_setup"
diff --git a/.github/workflows/_lint.yml b/.github/workflows/_lint.yml
index fb7900fc89..953b878c18 100644
--- a/.github/workflows/_lint.yml
+++ b/.github/workflows/_lint.yml
@@ -38,7 +38,7 @@ jobs:
     timeout-minutes: 20
     steps:
       - name: "📋 Checkout Code"
-        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v6
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v6
 
       - name: "🐍 Set up Python ${{ inputs.python-version }} + UV"
         uses: "./.github/actions/uv_setup"
diff --git a/.github/workflows/_refresh_model_profiles.yml b/.github/workflows/_refresh_model_profiles.yml
index 95b7d1b8a8..ef29805ab9 100644
--- a/.github/workflows/_refresh_model_profiles.yml
+++ b/.github/workflows/_refresh_model_profiles.yml
@@ -91,11 +91,11 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: "📋 Checkout"
-        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v6
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v6
 
       - name: "📋 Checkout langchain-profiles CLI"
         if: inputs.cli-path == ''
-        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v6
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v6
         with:
           repository: langchain-ai/langchain
           ref: ${{ inputs.cli-ref }}
diff --git a/.github/workflows/_release.yml b/.github/workflows/_release.yml
index ecdb14bb93..4d0f46575b 100644
--- a/.github/workflows/_release.yml
+++ b/.github/workflows/_release.yml
@@ -152,7 +152,7 @@ jobs:
       version: ${{ steps.check-version.outputs.version }}
 
     steps:
-      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v6
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v6
 
       - name: Set up Python + uv
         uses: "./.github/actions/uv_setup"
@@ -293,7 +293,7 @@ jobs:
     outputs:
       release-body: ${{ steps.generate-release-body.outputs.release-body }}
     steps:
-      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v6
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v6
         with:
           repository: langchain-ai/langchain
           path: langchain
@@ -391,7 +391,7 @@ jobs:
       contents: read
     timeout-minutes: 20
     steps:
-      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v6
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v6
 
       # We explicitly *don't* set up caching here. This ensures our tests are
       # maximally sensitive to catching breakage.
@@ -556,7 +556,7 @@ jobs:
       id-token: write
 
     steps:
-      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v6
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v6
 
       - uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8
         with:
@@ -564,7 +564,7 @@ jobs:
           path: ${{ env.EFFECTIVE_WORKING_DIR }}/dist/
 
       - name: Publish to test PyPI
-        uses: pypa/gh-action-pypi-publish@cef221092ed1bacb1cc03d23a2d87d1d172e277b # release/v1
+        uses: pypa/gh-action-pypi-publish@dc37677b2e1c63e2034f94d8a5b11f265b73ba33 # release/v1
         with:
           packages-dir: ${{ env.EFFECTIVE_WORKING_DIR }}/dist/
           verbose: true
@@ -613,7 +613,7 @@ jobs:
       AZURE_OPENAI_EMBEDDINGS_DEPLOYMENT_NAME: ${{ secrets.AZURE_OPENAI_EMBEDDINGS_DEPLOYMENT_NAME }}
       LANGCHAIN_TESTS_USER_AGENT: ${{ secrets.LANGCHAIN_TESTS_USER_AGENT }}
     steps:
-      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v6
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v6
 
       # We implement this conditional as Github Actions does not have good support
       # for conditionally needing steps. https://github.com/actions/runner/issues/491
@@ -773,11 +773,11 @@ jobs:
     # No API keys needed for now - deepagents `make test` only runs unit tests
 
     steps:
-      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v6
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v6
         with:
           path: langchain
 
-      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v6
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v6
         with:
           repository: ${{ matrix.package.repo }}
           path: ${{ matrix.package.name }}
@@ -840,7 +840,7 @@ jobs:
         working-directory: ${{ env.EFFECTIVE_WORKING_DIR }}
 
     steps:
-      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v6
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v6
 
       - name: Set up Python + uv
         uses: "./.github/actions/uv_setup"
@@ -854,7 +854,7 @@ jobs:
           path: ${{ env.EFFECTIVE_WORKING_DIR }}/dist/
 
       - name: Publish package distributions to PyPI
-        uses: pypa/gh-action-pypi-publish@cef221092ed1bacb1cc03d23a2d87d1d172e277b # release/v1
+        uses: pypa/gh-action-pypi-publish@dc37677b2e1c63e2034f94d8a5b11f265b73ba33 # release/v1
         with:
           packages-dir: ${{ env.EFFECTIVE_WORKING_DIR }}/dist/
           verbose: true
@@ -885,7 +885,7 @@ jobs:
         working-directory: ${{ env.EFFECTIVE_WORKING_DIR }}
 
     steps:
-      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v6
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v6
 
       - name: Set up Python + uv
         uses: "./.github/actions/uv_setup"
diff --git a/.github/workflows/_test.yml b/.github/workflows/_test.yml
index 7869f67870..1b0cd7bd6b 100644
--- a/.github/workflows/_test.yml
+++ b/.github/workflows/_test.yml
@@ -33,7 +33,7 @@ jobs:
     name: "Python ${{ inputs.python-version }}"
     steps:
       - name: "📋 Checkout Code"
-        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v6
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v6
 
       - name: "🐍 Set up Python ${{ inputs.python-version }} + UV"
         uses: "./.github/actions/uv_setup"
diff --git a/.github/workflows/_test_pydantic.yml b/.github/workflows/_test_pydantic.yml
index 6d72a3797f..5f53928a3a 100644
--- a/.github/workflows/_test_pydantic.yml
+++ b/.github/workflows/_test_pydantic.yml
@@ -36,7 +36,7 @@ jobs:
     name: "Pydantic ~=${{ inputs.pydantic-version }}"
     steps:
       - name: "📋 Checkout Code"
-        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v6
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v6
 
       - name: "🐍 Set up Python ${{ inputs.python-version }} + UV"
         uses: "./.github/actions/uv_setup"
diff --git a/.github/workflows/_test_vcr.yml b/.github/workflows/_test_vcr.yml
index 2948014c5d..2fe1870b46 100644
--- a/.github/workflows/_test_vcr.yml
+++ b/.github/workflows/_test_vcr.yml
@@ -34,7 +34,7 @@ jobs:
     timeout-minutes: 20
     name: "Python ${{ inputs.python-version }}"
     steps:
-      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v6
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v6
 
       - name: "🐍 Set up Python ${{ inputs.python-version }} + UV"
         uses: "./.github/actions/uv_setup"
diff --git a/.github/workflows/bump_uv_pin.yml b/.github/workflows/bump_uv_pin.yml
index e38268c37b..2c2a3a4c0a 100644
--- a/.github/workflows/bump_uv_pin.yml
+++ b/.github/workflows/bump_uv_pin.yml
@@ -33,7 +33,7 @@ jobs:
       contents: write
       pull-requests: write
     steps:
-      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v6
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v6
 
       - name: Resolve current and latest uv versions
         id: versions
diff --git a/.github/workflows/check_agents_sync.yml b/.github/workflows/check_agents_sync.yml
index 851a33ae43..2d895d8ca5 100644
--- a/.github/workflows/check_agents_sync.yml
+++ b/.github/workflows/check_agents_sync.yml
@@ -27,7 +27,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: "📋 Checkout Code"
-        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v6
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v6
 
       - name: "🔍 Check CLAUDE.md and AGENTS.md are in sync"
         run: |
diff --git a/.github/workflows/check_diffs.yml b/.github/workflows/check_diffs.yml
index fde5b2990f..6307c94250 100644
--- a/.github/workflows/check_diffs.yml
+++ b/.github/workflows/check_diffs.yml
@@ -46,7 +46,7 @@ jobs:
     if: ${{ !contains(github.event.pull_request.labels.*.name, 'ci-ignore') }}
     steps:
       - name: "📋 Checkout Code"
-        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v6
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v6
       - name: "🐍 Setup Python 3.11"
         uses: actions/setup-python@5fda3b95a4ea91299a34e894583c3862153e4b97 # v7.0.0
         with:
@@ -159,7 +159,7 @@ jobs:
       run:
         working-directory: ${{ matrix.job-configs.working-directory }}
     steps:
-      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v6
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v6
 
       - name: "🐍 Set up Python ${{ matrix.job-configs.python-version }} + UV"
         uses: "./.github/actions/uv_setup"
@@ -195,7 +195,7 @@ jobs:
     if: github.repository_owner == 'langchain-ai'
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v6
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v6
       - name: "🐍 Setup Python 3.11"
         uses: actions/setup-python@5fda3b95a4ea91299a34e894583c3862153e4b97 # v7.0.0
         with:
diff --git a/.github/workflows/check_extras_sync.yml b/.github/workflows/check_extras_sync.yml
index f76bfe46c6..089e80a23a 100644
--- a/.github/workflows/check_extras_sync.yml
+++ b/.github/workflows/check_extras_sync.yml
@@ -30,7 +30,7 @@ jobs:
     timeout-minutes: 2
     steps:
       - name: "📋 Checkout Code"
-        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v6
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v6
 
       - name: "🐍 Set up Python and uv"
         uses: "./.github/actions/uv_setup"
diff --git a/.github/workflows/check_release_deps.yml b/.github/workflows/check_release_deps.yml
index aef6b9b761..28b0ad047c 100644
--- a/.github/workflows/check_release_deps.yml
+++ b/.github/workflows/check_release_deps.yml
@@ -50,7 +50,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 10
     steps:
-      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v6
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v6
         with:
           fetch-depth: 0
 
diff --git a/.github/workflows/check_versions.yml b/.github/workflows/check_versions.yml
index 1b69843ffb..e99d4a1b3c 100644
--- a/.github/workflows/check_versions.yml
+++ b/.github/workflows/check_versions.yml
@@ -23,7 +23,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v6
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v6
 
       - uses: astral-sh/setup-uv@0ca8f610542aa7f4acaf39e65cf4eb3c35091883 # v7
         with:
diff --git a/.github/workflows/close_unchecked_issues.yml b/.github/workflows/close_unchecked_issues.yml
index b980eefb08..28b9ac9388 100644
--- a/.github/workflows/close_unchecked_issues.yml
+++ b/.github/workflows/close_unchecked_issues.yml
@@ -36,7 +36,7 @@ jobs:
       issues: write
 
     steps:
-      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v6
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v6
 
       - name: Generate GitHub App token
         id: app-token
diff --git a/.github/workflows/codspeed.yml b/.github/workflows/codspeed.yml
index 9badd47acc..ff3c97a817 100644
--- a/.github/workflows/codspeed.yml
+++ b/.github/workflows/codspeed.yml
@@ -32,7 +32,7 @@ jobs:
     if: ${{ github.repository_owner == 'langchain-ai' && !contains(github.event.pull_request.labels.*.name, 'codspeed-ignore') }}
     steps:
       - name: "📋 Checkout Code"
-        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v6
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v6
       - name: "🐍 Setup Python 3.11"
         uses: actions/setup-python@5fda3b95a4ea91299a34e894583c3862153e4b97 # v7.0.0
         with:
@@ -62,7 +62,7 @@ jobs:
         job-configs: ${{ fromJson(needs.build.outputs.codspeed) }}
       fail-fast: false
     steps:
-      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v6
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v6
 
       - name: "📦 Install UV Package Manager"
         uses: astral-sh/setup-uv@0ca8f610542aa7f4acaf39e65cf4eb3c35091883 # v7
diff --git a/.github/workflows/integration_tests.yml b/.github/workflows/integration_tests.yml
index 633b931df9..a6d234226f 100644
--- a/.github/workflows/integration_tests.yml
+++ b/.github/workflows/integration_tests.yml
@@ -172,12 +172,12 @@ jobs:
         working-directory: ${{ fromJSON(needs.compute-matrix.outputs.matrix).working-directory }}
 
     steps:
-      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v6
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v6
         with:
           path: langchain
 
       # These libraries exist outside of the monorepo and need to be checked out separately
-      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v6
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v6
         with:
           repository: langchain-ai/langchain-google
           path: langchain-google
@@ -186,12 +186,12 @@ jobs:
         uses: google-github-actions/auth@7c6bc770dae815cd3e89ee6cdf493a5fab2cc093 # v3
         with:
           credentials_json: "${{ secrets.GOOGLE_CREDENTIALS }}"
-      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v6
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v6
         with:
           repository: langchain-ai/langchain-aws
           path: langchain-aws
       - name: "🔐 Configure AWS Credentials"
-        uses: aws-actions/configure-aws-credentials@254c19bd240aabef8777f48595e9d2d7b972184b # v6
+        uses: aws-actions/configure-aws-credentials@e6de054238d6b7531b4efff3b6587d9aade6a06c # v6
         with:
           aws-access-key-id: ${{ secrets.AWS_ACCESS_KEY_ID }}
           aws-secret-access-key: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
@@ -371,11 +371,11 @@ jobs:
             path: libs/deepagents
 
     steps:
-      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v6
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v6
         with:
           path: langchain
 
-      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v6
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v6
         with:
           repository: ${{ matrix.package.repo }}
           path: ${{ matrix.package.name }}
diff --git a/.github/workflows/pr_labeler.yml b/.github/workflows/pr_labeler.yml
index ff0c851cef..9982500310 100644
--- a/.github/workflows/pr_labeler.yml
+++ b/.github/workflows/pr_labeler.yml
@@ -52,7 +52,7 @@ jobs:
     steps:
       # Checks out the BASE branch (safe for pull_request_target — never
       # the PR head). Needed to load .github/scripts/pr-labeler*.
-      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v6
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v6
 
       - name: Generate GitHub App token
         if: github.event.action == 'opened'
diff --git a/.github/workflows/pr_labeler_backfill.yml b/.github/workflows/pr_labeler_backfill.yml
index 83450caf9d..31f5343f53 100644
--- a/.github/workflows/pr_labeler_backfill.yml
+++ b/.github/workflows/pr_labeler_backfill.yml
@@ -27,7 +27,7 @@ jobs:
       issues: write
 
     steps:
-      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v6
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v6
 
       - name: Generate GitHub App token
         id: app-token
diff --git a/.github/workflows/tag-external-issues.yml b/.github/workflows/tag-external-issues.yml
index ef584b7f6d..ef5a83cc24 100644
--- a/.github/workflows/tag-external-issues.yml
+++ b/.github/workflows/tag-external-issues.yml
@@ -51,7 +51,7 @@ jobs:
       issues: write
 
     steps:
-      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v6
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v6
 
       - name: Generate GitHub App token
         id: app-token
@@ -119,7 +119,7 @@ jobs:
       issues: write
 
     steps:
-      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v6
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v6
 
       - name: Generate GitHub App token
         id: app-token