diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d172a06..23902de 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -13,7 +13,7 @@ jobs:
       matrix:
         python: ["3.11", "3.12", "3.13"]
     steps:
-      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10  # v6.0.3
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0  # v7.0.0
         with:
           persist-credentials: false  # tests only read the repo; no authenticated git ops
       - uses: astral-sh/setup-uv@fac544c07dec837d0ccb6301d7b5580bf5edae39  # v8.2.0
diff --git a/.github/workflows/public-microbench.yml b/.github/workflows/public-microbench.yml
index 3225635..26ff938 100644
--- a/.github/workflows/public-microbench.yml
+++ b/.github/workflows/public-microbench.yml
@@ -27,7 +27,7 @@ jobs:
   microbench:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10  # v6.0.3
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0  # v7.0.0
         with:
           persist-credentials: false  # read-only benchmark harness; no authenticated git ops
       - uses: astral-sh/setup-uv@fac544c07dec837d0ccb6301d7b5580bf5edae39  # v8.2.0
diff --git a/.github/workflows/publish-testpypi.yml b/.github/workflows/publish-testpypi.yml
index 2346133..74c2c00 100644
--- a/.github/workflows/publish-testpypi.yml
+++ b/.github/workflows/publish-testpypi.yml
@@ -27,7 +27,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10  # v6.0.3
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0  # v7.0.0
         with:
           ref: ${{ inputs.ref }}
           persist-credentials: false  # build from the tag only; publish is OIDC, not git creds
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 667a873..5162794 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -26,7 +26,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10  # v6.0.3
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0  # v7.0.0
         with:
           ref: ${{ inputs.ref }}
           persist-credentials: false  # build from the tag only; publish is OIDC, not git creds
diff --git a/.github/workflows/release-gate.yml b/.github/workflows/release-gate.yml
index a6375d1..333b36c 100644
--- a/.github/workflows/release-gate.yml
+++ b/.github/workflows/release-gate.yml
@@ -31,7 +31,7 @@ jobs:
       matrix:
         python: ["3.11", "3.12", "3.13"]
     steps:
-      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10  # v6.0.3
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0  # v7.0.0
         with:
           ref: ${{ inputs.ref || github.ref }}
           fetch-depth: 0
@@ -53,7 +53,7 @@ jobs:
       id-token: write       # OIDC for Sigstore signing — short-lived, no stored secret
       attestations: write   # write the build-provenance attestation
     steps:
-      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10  # v6.0.3
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0  # v7.0.0
         with:
           ref: ${{ inputs.ref || github.ref }}
           fetch-depth: 0
diff --git a/.github/workflows/security.yml b/.github/workflows/security.yml
index 4cc4e97..8fb9081 100644
--- a/.github/workflows/security.yml
+++ b/.github/workflows/security.yml
@@ -11,7 +11,7 @@ jobs:
   sca-sast:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           persist-credentials: false # read-only SCA/SAST; no authenticated git ops
       - uses: astral-sh/setup-uv@fac544c07dec837d0ccb6301d7b5580bf5edae39 # v8.2.0