diff --git a/.github/workflows/build-and-push-bskyweb-aws.yaml b/.github/workflows/build-and-push-bskyweb-aws.yaml
index 660498fbd3..2c8d09c776 100644
--- a/.github/workflows/build-and-push-bskyweb-aws.yaml
+++ b/.github/workflows/build-and-push-bskyweb-aws.yaml
@@ -22,13 +22,13 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
 
       - name: Setup Docker buildx
-        uses: docker/setup-buildx-action@v1
+        uses: docker/setup-buildx-action@d7f5e7f509e45cec5c76c4d5afdd7de93d0b3df5 # v4.1.0
 
       - name: Log into registry ${{ env.REGISTRY }}
-        uses: docker/login-action@v2
+        uses: docker/login-action@650006c6eb7dba73a995cc03b0b2d7f5ca915bee # v4.2.0
         with:
           registry: ${{ env.REGISTRY }}
           username: ${{ env.USERNAME}}
@@ -36,7 +36,7 @@ jobs:
 
       - name: Extract Docker metadata
         id: meta
-        uses: docker/metadata-action@v4
+        uses: docker/metadata-action@80c7e94dd9b9319bd5eb7a0e0fe9291e23a2a2e9 # v6.1.0
         with:
           images: |
             ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
@@ -51,7 +51,7 @@ jobs:
 
       - name: Build and push Docker image
         id: build-and-push
-        uses: docker/build-push-action@v4
+        uses: docker/build-push-action@f9f3042f7e2789586610d6e8b85c8f03e5195baf # v7.2.0
         with:
           context: .
           push: ${{ github.event_name != 'pull_request' }}
diff --git a/.github/workflows/build-and-push-bskyweb-ghcr.yaml b/.github/workflows/build-and-push-bskyweb-ghcr.yaml
index c7cec477e8..693e9a1d3b 100644
--- a/.github/workflows/build-and-push-bskyweb-ghcr.yaml
+++ b/.github/workflows/build-and-push-bskyweb-ghcr.yaml
@@ -23,13 +23,13 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
 
       - name: Setup Docker buildx
-        uses: docker/setup-buildx-action@v1
+        uses: docker/setup-buildx-action@d7f5e7f509e45cec5c76c4d5afdd7de93d0b3df5 # v4.1.0
 
       - name: Log into registry ${{ env.REGISTRY }}
-        uses: docker/login-action@v2
+        uses: docker/login-action@650006c6eb7dba73a995cc03b0b2d7f5ca915bee # v4.2.0
         with:
           registry: ${{ env.REGISTRY }}
           username: ${{ env.USERNAME }}
@@ -37,7 +37,7 @@ jobs:
 
       - name: Extract Docker metadata
         id: meta
-        uses: docker/metadata-action@v4
+        uses: docker/metadata-action@80c7e94dd9b9319bd5eb7a0e0fe9291e23a2a2e9 # v6.1.0
         with:
           images: |
             ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
@@ -46,7 +46,7 @@ jobs:
 
       - name: Build and push Docker image
         id: build-and-push
-        uses: docker/build-push-action@v4
+        uses: docker/build-push-action@f9f3042f7e2789586610d6e8b85c8f03e5195baf # v7.2.0
         with:
           context: .
           push: ${{ github.event_name != 'pull_request' }}
diff --git a/.github/workflows/build-and-push-embedr-aws.yaml b/.github/workflows/build-and-push-embedr-aws.yaml
index 4eb1c550d9..a4e1bd2c88 100644
--- a/.github/workflows/build-and-push-embedr-aws.yaml
+++ b/.github/workflows/build-and-push-embedr-aws.yaml
@@ -22,13 +22,13 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
 
       - name: Setup Docker buildx
-        uses: docker/setup-buildx-action@v1
+        uses: docker/setup-buildx-action@d7f5e7f509e45cec5c76c4d5afdd7de93d0b3df5 # v4.1.0
 
       - name: Log into registry ${{ env.REGISTRY }}
-        uses: docker/login-action@v2
+        uses: docker/login-action@650006c6eb7dba73a995cc03b0b2d7f5ca915bee # v4.2.0
         with:
           registry: ${{ env.REGISTRY }}
           username: ${{ env.USERNAME}}
@@ -36,7 +36,7 @@ jobs:
 
       - name: Extract Docker metadata
         id: meta
-        uses: docker/metadata-action@v4
+        uses: docker/metadata-action@80c7e94dd9b9319bd5eb7a0e0fe9291e23a2a2e9 # v6.1.0
         with:
           images: |
             ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
@@ -45,7 +45,7 @@ jobs:
 
       - name: Build and push Docker image
         id: build-and-push
-        uses: docker/build-push-action@v4
+        uses: docker/build-push-action@f9f3042f7e2789586610d6e8b85c8f03e5195baf # v7.2.0
         with:
           context: .
           push: ${{ github.event_name != 'pull_request' }}
diff --git a/.github/workflows/build-and-push-link-aws.yaml b/.github/workflows/build-and-push-link-aws.yaml
index f0825fd0c9..31eaa8357f 100644
--- a/.github/workflows/build-and-push-link-aws.yaml
+++ b/.github/workflows/build-and-push-link-aws.yaml
@@ -22,13 +22,13 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
 
       - name: Setup Docker buildx
-        uses: docker/setup-buildx-action@v1
+        uses: docker/setup-buildx-action@d7f5e7f509e45cec5c76c4d5afdd7de93d0b3df5 # v4.1.0
 
       - name: Log into registry ${{ env.REGISTRY }}
-        uses: docker/login-action@v2
+        uses: docker/login-action@650006c6eb7dba73a995cc03b0b2d7f5ca915bee # v4.2.0
         with:
           registry: ${{ env.REGISTRY }}
           username: ${{ env.USERNAME}}
@@ -36,7 +36,7 @@ jobs:
 
       - name: Extract Docker metadata
         id: meta
-        uses: docker/metadata-action@v4
+        uses: docker/metadata-action@80c7e94dd9b9319bd5eb7a0e0fe9291e23a2a2e9 # v6.1.0
         with:
           images: |
             ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
@@ -45,7 +45,7 @@ jobs:
 
       - name: Build and push Docker image
         id: build-and-push
-        uses: docker/build-push-action@v4
+        uses: docker/build-push-action@f9f3042f7e2789586610d6e8b85c8f03e5195baf # v7.2.0
         with:
           context: .
           push: true
diff --git a/.github/workflows/build-and-push-ogcard-aws.yaml b/.github/workflows/build-and-push-ogcard-aws.yaml
index 9bd14879c7..3102b05975 100644
--- a/.github/workflows/build-and-push-ogcard-aws.yaml
+++ b/.github/workflows/build-and-push-ogcard-aws.yaml
@@ -22,13 +22,13 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
 
       - name: Setup Docker buildx
-        uses: docker/setup-buildx-action@v1
+        uses: docker/setup-buildx-action@d7f5e7f509e45cec5c76c4d5afdd7de93d0b3df5 # v4.1.0
 
       - name: Log into registry ${{ env.REGISTRY }}
-        uses: docker/login-action@v2
+        uses: docker/login-action@650006c6eb7dba73a995cc03b0b2d7f5ca915bee # v4.2.0
         with:
           registry: ${{ env.REGISTRY }}
           username: ${{ env.USERNAME}}
@@ -36,7 +36,7 @@ jobs:
 
       - name: Extract Docker metadata
         id: meta
-        uses: docker/metadata-action@v4
+        uses: docker/metadata-action@80c7e94dd9b9319bd5eb7a0e0fe9291e23a2a2e9 # v6.1.0
         with:
           images: |
             ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
@@ -45,7 +45,7 @@ jobs:
 
       - name: Build and push Docker image
         id: build-and-push
-        uses: docker/build-push-action@v4
+        uses: docker/build-push-action@f9f3042f7e2789586610d6e8b85c8f03e5195baf # v7.2.0
         with:
           context: .
           push: true
diff --git a/.github/workflows/build-submit-android.yml b/.github/workflows/build-submit-android.yml
index fe9d5b1c5b..2716942e40 100644
--- a/.github/workflows/build-submit-android.yml
+++ b/.github/workflows/build-submit-android.yml
@@ -11,6 +11,10 @@ on:
           - testflight-android
           - production
 
+# Deploys happen via EAS using EXPO_TOKEN; the GITHUB_TOKEN only checks out code
+permissions:
+  contents: read
+
 jobs:
   build:
     if: github.repository == 'bluesky-social/social-app'
@@ -28,32 +32,32 @@ jobs:
           fi
 
       - name: ⬇️ Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
         with:
           fetch-depth: 5
 
-      - uses: pnpm/action-setup@v6
+      - uses: pnpm/action-setup@0ebf47130e4866e96fce0953f49152a61190b271 # v6.0.9
 
       - name: 🔧 Setup Node
-        uses: actions/setup-node@v6
+        uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
         with:
           node-version-file: package.json
           cache: pnpm
 
       - name: 🪛 Setup jq
-        uses: dcarbone/install-jq-action@v2
+        uses: dcarbone/install-jq-action@b7ef57d46ece78760b4019dbc4080a1ba2a40b45 # v3.2.0
 
       - name: ⚙️ Install dependencies
         run: pnpm install --frozen-lockfile
 
       - name: 🔨 Setup Expo CLI
-        uses: expo/expo-github-action@v9
+        uses: expo/expo-github-action@eab7a230208c952974db8c3245cfd78402c7b385 # 9.0.0
         with:
           eas-version: '19.0.5'
           packager: 'pnpm --allow-build=dtrace-provider'
           token: ${{ secrets.EXPO_TOKEN }}
 
-      - uses: actions/setup-java@v5
+      - uses: actions/setup-java@ad2b38190b15e4d6bdf0c97fb4fca8412226d287 # v5.3.0
         with:
           distribution: "temurin"
           java-version: "17"
@@ -98,14 +102,12 @@ jobs:
 
       - name: ⏰ Get a timestamp
         id: timestamp
-        uses: nanzm/get-time-action@master
-        with:
-          format: "MM-DD-HH-mm-ss"
+        run: echo "time=$(date -u +'%m-%d-%H-%M-%S')" >> "$GITHUB_OUTPUT"
 
       - name: 🚀 Upload Production Artifact
         id: upload-artifact-production
         if: ${{ inputs.profile == 'production' }}
-        uses: actions/upload-artifact@v7
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
         with:
           retention-days: 30
           compression-level: 6
@@ -115,7 +117,7 @@ jobs:
       - name: 🚀 Upload Testflight Artifact
         id: upload-artifact-testflight
         if: ${{ inputs.profile != 'production' }}
-        uses: actions/upload-artifact@v7
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
         with:
           retention-days: 30
           compression-level: 6
@@ -128,7 +130,7 @@ jobs:
 
       - name: 🔔 Notify Slack of Production Build
         if: ${{ inputs.profile == 'production' }}
-        uses: slackapi/slack-github-action@v3.0.3
+        uses: slackapi/slack-github-action@45a88b9581bfab2566dc881e2cd66d334e621e2c # v3.0.3
         with:
           webhook: ${{ secrets.SLACK_CLIENT_ALERT_WEBHOOK }}
           webhook-type: incoming-webhook
@@ -138,7 +140,7 @@ jobs:
 
       - name: 🔔 Notify Slack of Testflight Build
         if: ${{ inputs.profile != 'production' }}
-        uses: slackapi/slack-github-action@v3.0.3
+        uses: slackapi/slack-github-action@45a88b9581bfab2566dc881e2cd66d334e621e2c # v3.0.3
         with:
           webhook: ${{ secrets.SLACK_CLIENT_ALERT_WEBHOOK }}
           webhook-type: incoming-webhook
@@ -165,7 +167,7 @@ jobs:
       - name: 🚀 Upload Production APK Artifact
         id: upload-artifact-production-apk
         if: ${{ inputs.profile == 'production' }}
-        uses: actions/upload-artifact@v7
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
         with:
           retention-days: 30
           compression-level: 6
@@ -174,7 +176,7 @@ jobs:
 
       - name: 🔔 Notify Slack of Production APK Build
         if: ${{ inputs.profile == 'production' }}
-        uses: slackapi/slack-github-action@v3.0.3
+        uses: slackapi/slack-github-action@45a88b9581bfab2566dc881e2cd66d334e621e2c # v3.0.3
         with:
           webhook: ${{ secrets.SLACK_CLIENT_ALERT_WEBHOOK }}
           webhook-type: incoming-webhook
@@ -184,7 +186,7 @@ jobs:
 
       - name: ⬇️ Restore Cache
         id: get-base-commit
-        uses: actions/cache@v5
+        uses: actions/cache@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5.0.5
         if: ${{ inputs.profile == 'testflight-android' }}
         with:
           path: most-recent-testflight-commit.txt
diff --git a/.github/workflows/build-submit-ios.yml b/.github/workflows/build-submit-ios.yml
index d2cc7a7abb..4b13c5b03b 100644
--- a/.github/workflows/build-submit-ios.yml
+++ b/.github/workflows/build-submit-ios.yml
@@ -11,6 +11,10 @@ on:
           - testflight
           - production
 
+# Deploys happen via EAS using EXPO_TOKEN; the GITHUB_TOKEN only checks out code
+permissions:
+  contents: read
+
 jobs:
   build:
     if: github.repository == 'bluesky-social/social-app'
@@ -28,42 +32,42 @@ jobs:
           fi
 
       - name: ⬇️ Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
         with:
           fetch-depth: 5
 
-      - uses: pnpm/action-setup@v6
+      - uses: pnpm/action-setup@0ebf47130e4866e96fce0953f49152a61190b271 # v6.0.9
 
       - name: 🔧 Setup Node
-        uses: actions/setup-node@v6
+        uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
         with:
           node-version-file: package.json
           cache: pnpm
 
       - name: 🪛 Setup jq
-        uses: dcarbone/install-jq-action@v2
+        uses: dcarbone/install-jq-action@b7ef57d46ece78760b4019dbc4080a1ba2a40b45 # v3.2.0
 
       - name: ⚙️ Install dependencies
         run: pnpm install --frozen-lockfile
 
       - name: 🔨 Setup Expo CLI
-        uses: expo/expo-github-action@v9
+        uses: expo/expo-github-action@eab7a230208c952974db8c3245cfd78402c7b385 # 9.0.0
         with:
           eas-version: '19.0.5'
           packager: 'pnpm --allow-build=dtrace-provider'
           token: ${{ secrets.EXPO_TOKEN }}
 
-      - uses: maxim-lobanov/setup-xcode@v1
+      - uses: maxim-lobanov/setup-xcode@ed7a3b1fda3918c0306d1b724322adc0b8cc0a90 # v1.7.0
         with:
           xcode-version: "26.4"
 
       - name: ☕️ Setup Cocoapods
-        uses: maxim-lobanov/setup-cocoapods@v1
+        uses: maxim-lobanov/setup-cocoapods@8e97e1e98e6ccf42564fdf5622c8feec74199377 # v1.4.0
         with:
           version: 1.16.2
 
       - name: 💾 Cache Pods
-        uses: actions/cache@v5
+        uses: actions/cache@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5.0.5
         id: pods-cache
         with:
           path: ./ios/Pods
@@ -155,7 +159,7 @@ jobs:
 
       - name: 🔔 Notify Slack of Production Build
         if: ${{ inputs.profile == 'production' }}
-        uses: slackapi/slack-github-action@v3.0.3
+        uses: slackapi/slack-github-action@45a88b9581bfab2566dc881e2cd66d334e621e2c # v3.0.3
         with:
           webhook: ${{ secrets.SLACK_CLIENT_ALERT_WEBHOOK }}
           webhook-type: incoming-webhook
@@ -165,7 +169,7 @@ jobs:
 
       - name: ⬇️ Restore Cache
         id: get-base-commit
-        uses: actions/cache@v5
+        uses: actions/cache@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5.0.5
         if: ${{ inputs.profile == 'testflight' }}
         with:
           path: most-recent-testflight-commit.txt
diff --git a/.github/workflows/bundle-deploy-eas-update.yml b/.github/workflows/bundle-deploy-eas-update.yml
index 5f1f0a4e28..5185da34c0 100644
--- a/.github/workflows/bundle-deploy-eas-update.yml
+++ b/.github/workflows/bundle-deploy-eas-update.yml
@@ -18,6 +18,10 @@ on:
         description: Runtime version (in x.x.x format) that this update is for
         required: true
 
+# Deploys happen via EAS using EXPO_TOKEN; the GITHUB_TOKEN only checks out code
+permissions:
+  contents: read
+
 jobs:
   bundleDeploy:
     if: github.repository == 'bluesky-social/social-app'
@@ -48,7 +52,7 @@ jobs:
           fi
 
       - name: ⬇️ Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
         with:
           fetch-depth: 0
 
@@ -56,17 +60,17 @@ jobs:
         if: ${{ github.ref != 'refs/heads/main' }}
         run: git fetch origin main:main --depth 100
 
-      - uses: pnpm/action-setup@v6
+      - uses: pnpm/action-setup@0ebf47130e4866e96fce0953f49152a61190b271 # v6.0.9
 
       - name: 🔧 Setup Node
-        uses: actions/setup-node@v6
+        uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
         with:
           node-version-file: package.json
           cache: pnpm
 
       - name: 📷 Check fingerprint and install dependencies
         id: fingerprint
-        uses: bluesky-social/github-actions/fingerprint-native@main
+        uses: bluesky-social/github-actions/fingerprint-native@ebc6aa6d7466dc1e78b1e832041b7b81f6f95030 # v0.1.0
         with:
           profile: ${{ inputs.channel || 'testflight' }}
           previous-commit-tag: ${{ inputs.runtimeVersion }}
@@ -87,7 +91,7 @@ jobs:
         run: pnpm typecheck
 
       - name: 🔨 Setup EAS
-        uses: expo/expo-github-action@v9
+        uses: expo/expo-github-action@eab7a230208c952974db8c3245cfd78402c7b385 # 9.0.0
         if: ${{ !steps.fingerprint.outputs.includes-changes }}
         with:
           eas-version: '19.0.5'
@@ -96,7 +100,7 @@ jobs:
 
       - name: 🪛 Setup jq
         if: ${{ !steps.fingerprint.outputs.includes-changes }}
-        uses: dcarbone/install-jq-action@v2
+        uses: dcarbone/install-jq-action@b7ef57d46ece78760b4019dbc4080a1ba2a40b45 # v3.2.0
 
       # eas.json not used here, set EXPO_PUBLIC_ENV
       - name: Env
@@ -137,7 +141,7 @@ jobs:
 
       - name: ⬇️ Restore Cache
         id: get-base-commit
-        uses: actions/cache@v5
+        uses: actions/cache@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5.0.5
         if: ${{ !steps.fingerprint.outputs.includes-changes }}
         with:
           path: most-recent-testflight-commit.txt
@@ -167,20 +171,20 @@ jobs:
           fi
 
       - name: ⬇️ Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
         with:
           fetch-depth: 5
 
-      - uses: pnpm/action-setup@v6
+      - uses: pnpm/action-setup@0ebf47130e4866e96fce0953f49152a61190b271 # v6.0.9
 
       - name: 🔧 Setup Node
-        uses: actions/setup-node@v6
+        uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
         with:
           node-version-file: package.json
           cache: pnpm
 
       - name: 🔨 Setup EAS
-        uses: expo/expo-github-action@v9
+        uses: expo/expo-github-action@eab7a230208c952974db8c3245cfd78402c7b385 # 9.0.0
         with:
           eas-version: '19.0.5'
           packager: 'pnpm --allow-build=dtrace-provider'
@@ -189,17 +193,17 @@ jobs:
       - name: ⚙️ Install dependencies
         run: pnpm install --frozen-lockfile
 
-      - uses: maxim-lobanov/setup-xcode@v1
+      - uses: maxim-lobanov/setup-xcode@ed7a3b1fda3918c0306d1b724322adc0b8cc0a90 # v1.7.0
         with:
           xcode-version: "26.4"
 
       - name: ☕️ Setup Cocoapods
-        uses: maxim-lobanov/setup-cocoapods@v1
+        uses: maxim-lobanov/setup-cocoapods@8e97e1e98e6ccf42564fdf5622c8feec74199377 # v1.4.0
         with:
           version: 1.16.2
 
       - name: 💾 Cache Pods
-        uses: actions/cache@v5
+        uses: actions/cache@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5.0.5
         id: pods-cache
         with:
           path: ./ios/Pods
@@ -282,7 +286,7 @@ jobs:
 
       - name: ⬇️ Restore Cache
         id: get-base-commit
-        uses: actions/cache@v5
+        uses: actions/cache@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5.0.5
         if: ${{ inputs.channel == 'testflight' }}
         with:
           path: most-recent-testflight-commit.txt
@@ -314,26 +318,26 @@ jobs:
           fi
 
       - name: ⬇️ Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
         with:
           fetch-depth: 5
 
-      - uses: pnpm/action-setup@v6
+      - uses: pnpm/action-setup@0ebf47130e4866e96fce0953f49152a61190b271 # v6.0.9
 
       - name: 🔧 Setup Node
-        uses: actions/setup-node@v6
+        uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
         with:
           node-version-file: package.json
           cache: pnpm
 
       - name: 🔨 Setup EAS
-        uses: expo/expo-github-action@v9
+        uses: expo/expo-github-action@eab7a230208c952974db8c3245cfd78402c7b385 # 9.0.0
         with:
           eas-version: '19.0.5'
           packager: 'pnpm --allow-build=dtrace-provider'
           token: ${{ secrets.EXPO_TOKEN }}
 
-      - uses: actions/setup-java@v5
+      - uses: actions/setup-java@ad2b38190b15e4d6bdf0c97fb4fca8412226d287 # v5.3.0
         with:
           distribution: "temurin"
           java-version: "17"
@@ -372,13 +376,11 @@ jobs:
 
       - name: ⏰ Get a timestamp
         id: timestamp
-        uses: nanzm/get-time-action@master
-        with:
-          format: "MM-DD-HH-mm-ss"
+        run: echo "time=$(date -u +'%m-%d-%H-%M-%S')" >> "$GITHUB_OUTPUT"
 
       - name: 🚀 Upload Artifact
         id: upload-artifact
-        uses: actions/upload-artifact@v7
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
         with:
           retention-days: 30
           compression-level: 0
@@ -386,7 +388,7 @@ jobs:
           path: build.apk
 
       - name: 🔔 Notify Slack
-        uses: slackapi/slack-github-action@v3.0.3
+        uses: slackapi/slack-github-action@45a88b9581bfab2566dc881e2cd66d334e621e2c # v3.0.3
         with:
           webhook: ${{ secrets.SLACK_CLIENT_ALERT_WEBHOOK }}
           webhook-type: incoming-webhook
@@ -396,7 +398,7 @@ jobs:
 
       - name: ⬇️ Restore Cache
         id: get-base-commit
-        uses: actions/cache@v5
+        uses: actions/cache@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5.0.5
         if: ${{ inputs.channel != 'testflight' && inputs.channel != 'production' }}
         with:
           path: most-recent-testflight-commit.txt
diff --git a/.github/workflows/claude-mention.yml b/.github/workflows/claude-mention.yml
index 355a05adfb..5a7a7accff 100644
--- a/.github/workflows/claude-mention.yml
+++ b/.github/workflows/claude-mention.yml
@@ -54,18 +54,18 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v6
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
         with:
           fetch-depth: 1
 
       - name: Configure AWS credentials (OIDC)
-        uses: aws-actions/configure-aws-credentials@v6
+        uses: aws-actions/configure-aws-credentials@e7f100cf4c008499ea8adda475de1042d6975c7b # v6.2.0
         with:
           role-to-assume: ${{ secrets.AWS_BEDROCK_REVIEW_ROLE_ARN }}
           aws-region: us-east-2
 
       - name: Claude
-        uses: anthropics/claude-code-action@v1
+        uses: anthropics/claude-code-action@4d7e1f0cd85743fdc93b1c8040ab54395da024e2 # v1.0.149
         with:
           use_bedrock: 'true'
           additional_permissions: |
diff --git a/.github/workflows/claude-review.yml b/.github/workflows/claude-review.yml
index 9b7cdaa57d..3f6078219c 100644
--- a/.github/workflows/claude-review.yml
+++ b/.github/workflows/claude-review.yml
@@ -40,18 +40,18 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v6
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
         with:
           fetch-depth: 1
 
       - name: Configure AWS credentials (OIDC)
-        uses: aws-actions/configure-aws-credentials@v6
+        uses: aws-actions/configure-aws-credentials@e7f100cf4c008499ea8adda475de1042d6975c7b # v6.2.0
         with:
           role-to-assume: ${{ secrets.AWS_BEDROCK_REVIEW_ROLE_ARN }}
           aws-region: us-east-2
 
       - name: Claude review
-        uses: anthropics/claude-code-action@v1
+        uses: anthropics/claude-code-action@4d7e1f0cd85743fdc93b1c8040ab54395da024e2 # v1.0.149
         with:
           use_bedrock: 'true'
           additional_permissions: |
diff --git a/.github/workflows/golang-test-lint.yml b/.github/workflows/golang-test-lint.yml
index 2e7388bbd5..d61f0c153d 100644
--- a/.github/workflows/golang-test-lint.yml
+++ b/.github/workflows/golang-test-lint.yml
@@ -10,14 +10,17 @@ concurrency:
   group: "${{ github.workflow }}-${{ github.head_ref || github.ref }}"
   cancel-in-progress: true
 
+permissions:
+  contents: read
+
 jobs:
   build-and-test:
     runs-on: ubuntu-latest
     steps:
       - name: Git Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
       - name: Set up Go tooling
-        uses: actions/setup-go@v6
+        uses: actions/setup-go@4a3601121dd01d1626a1e23e37211e3254c1c06c # v6.4.0
         with:
           go-version-file: bskyweb/go.mod
           cache-dependency-path: bskyweb/go.sum
@@ -33,9 +36,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Git Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
       - name: Set up Go tooling
-        uses: actions/setup-go@v6
+        uses: actions/setup-go@4a3601121dd01d1626a1e23e37211e3254c1c06c # v6.4.0
         with:
           go-version-file: bskyweb/go.mod
           cache-dependency-path: bskyweb/go.sum
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 2fb464a92a..5b40ad541d 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -24,7 +24,7 @@ jobs:
         job: [lint, prettier, typecheck]
     steps:
       - name: Check out Git repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
       - name: Verify Node version pins match package.json
         run: |
           set -euo pipefail
@@ -50,9 +50,9 @@ jobs:
           v=$(grep -oE '"node":[[:space:]]*"[0-9]+\.[0-9]+\.[0-9]+"' eas.json | grep -oE '[0-9]+\.[0-9]+\.[0-9]+' | sort -u)
           check "eas.json" "$v"
           exit $rc
-      - uses: pnpm/action-setup@v6
+      - uses: pnpm/action-setup@0ebf47130e4866e96fce0953f49152a61190b271 # v6.0.9
       - name: Install node
-        uses: actions/setup-node@v6
+        uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
         with:
           node-version-file: package.json
           cache: pnpm
@@ -87,10 +87,10 @@ jobs:
         shard: [1, 2, 3, 4]
     steps:
       - name: Check out Git repository
-        uses: actions/checkout@v5
-      - uses: pnpm/action-setup@v6
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+      - uses: pnpm/action-setup@0ebf47130e4866e96fce0953f49152a61190b271 # v6.0.9
       - name: Install node
-        uses: actions/setup-node@v6
+        uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
         with:
           node-version-file: package.json
           cache: pnpm
diff --git a/.github/workflows/nightly-update-source-languages.yaml b/.github/workflows/nightly-update-source-languages.yaml
index 2a6ec26ac4..e6094476a6 100644
--- a/.github/workflows/nightly-update-source-languages.yaml
+++ b/.github/workflows/nightly-update-source-languages.yaml
@@ -16,12 +16,12 @@ jobs:
 
     steps:
       - name: Check out Git repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
         with:
           ssh-key: ${{secrets.GH_ACTION_DEPLOY_KEY}}
-      - uses: pnpm/action-setup@v6
+      - uses: pnpm/action-setup@0ebf47130e4866e96fce0953f49152a61190b271 # v6.0.9
       - name: Install node
-        uses: actions/setup-node@v6
+        uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
         with:
           node-version-file: package.json
           cache: pnpm
@@ -30,12 +30,12 @@ jobs:
       - name: Extract language strings
         run: pnpm intl:extract
       - name: Create commit
-        uses: stefanzweifel/git-auto-commit-action@v5
+        uses: stefanzweifel/git-auto-commit-action@04702edda442b2e678b25b537cec683a1493fcb9 # v7.1.0
         with:
           commit_message: Nightly source-language update
           file_pattern: ./src/locale/locales/en/messages.po
       - name: Push source lang to Crowdin
-        uses: crowdin/github-action@v2
+        uses: crowdin/github-action@52aa776766211d83d975df51f3b9c53c2f8ba35f # v2.16.3
         with:
           upload_sources: true
           upload_sources_args: "-b main"
diff --git a/.github/workflows/pull-request-comment.yml b/.github/workflows/pull-request-comment.yml
index 8ede462392..4f152f96f1 100644
--- a/.github/workflows/pull-request-comment.yml
+++ b/.github/workflows/pull-request-comment.yml
@@ -5,16 +5,15 @@ on:
   issue_comment:
     types: [created]
 
-# Permissiosn to make comments in the pull request
-permissions:
-  pull-requests: write
-  actions: write
-  contents: read
+# Permissions are granted per-job below; anything unlisted defaults to none
+permissions: {}
 
 jobs:
   handle-comment:
     if: github.event.issue.pull_request
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
     outputs:
       should-deploy: ${{ steps.check-org.outputs.result }}
 
@@ -45,10 +44,10 @@ jobs:
             echo "mentioned=false" >> $GITHUB_OUTPUT
           fi
 
-      - name: Check organization membership
+      - name: Check commenter has write access
         if: steps.check-mention.outputs.mentioned == 'true'
         id: check-org
-        uses: actions/github-script@v7
+        uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
         with:
           script: |
             try {
@@ -72,13 +71,16 @@ jobs:
     runs-on: ubuntu-latest
     needs: [handle-comment]
     if: needs.handle-comment.outputs.should-deploy == 'true'
+    permissions:
+      contents: read
+      pull-requests: write
 
     steps:
       - name: Get PR HEAD SHA
         env:
           ISSUE_NUMBER: ${{ github.event.issue.number }}
         id: pr-info
-        uses: actions/github-script@v7
+        uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
         with:
           script: |
             const pr = await github.rest.pulls.get({
@@ -87,6 +89,16 @@ jobs:
               pull_number: process.env.ISSUE_NUMBER,
             });
 
+            // This workflow runs with repo secrets in scope, so never build
+            // code from a fork: the commenter authorizes the deploy, but a
+            // fork controls what code would run during it
+            const expected = `${context.repo.owner}/${context.repo.repo}`;
+            const head = pr.data.head.repo?.full_name;
+            if (head !== expected) {
+              core.setFailed(`OTA deploys are only allowed for branches in ${expected}, not forks (got ${head})`);
+              return;
+            }
+
             console.log(`PR HEAD SHA: ${pr.data.head.sha}`);
             console.log(`PR HEAD REF: ${pr.data.head.ref}`);
 
@@ -94,7 +106,7 @@ jobs:
             core.setOutput('head-ref', pr.data.head.ref);
 
       - name: 💬 Drop a comment
-        uses: marocchino/sticky-pull-request-comment@v3
+        uses: marocchino/sticky-pull-request-comment@0ea0beb66eb9baf113663a64ec522f60e49231c0 # v3.0.4
         with:
           header: pull-request-eas-build-${{ steps.pr-info.outputs.head-sha }}
           number: ${{ github.event.issue.number }}
@@ -113,14 +125,14 @@ jobs:
           fi
 
       - name: ⬇️ Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
         with:
           ref: ${{ steps.pr-info.outputs.head-sha }}
 
-      - uses: pnpm/action-setup@v6
+      - uses: pnpm/action-setup@0ebf47130e4866e96fce0953f49152a61190b271 # v6.0.9
 
       - name: 🔧 Setup Node
-        uses: actions/setup-node@v6
+        uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
         with:
           node-version-file: package.json
           cache: pnpm
@@ -141,14 +153,14 @@ jobs:
         run: pnpm typecheck
 
       - name: 🔨 Setup EAS
-        uses: expo/expo-github-action@v9
+        uses: expo/expo-github-action@eab7a230208c952974db8c3245cfd78402c7b385 # 9.0.0
         with:
           eas-version: '19.0.5'
           packager: 'pnpm --allow-build=dtrace-provider'
           token: ${{ secrets.EXPO_TOKEN }}
 
       - name: 🪛 Setup jq
-        uses: dcarbone/install-jq-action@v2
+        uses: dcarbone/install-jq-action@b7ef57d46ece78760b4019dbc4080a1ba2a40b45 # v3.2.0
 
       - name: Env
         id: env
@@ -181,7 +193,7 @@ jobs:
           RUNTIME_VERSION:
 
       - name: 💬 Drop a comment
-        uses: marocchino/sticky-pull-request-comment@v3
+        uses: marocchino/sticky-pull-request-comment@0ea0beb66eb9baf113663a64ec522f60e49231c0 # v3.0.4
         env:
           ISSUE_NUMBER: ${{ github.event.issue.number }}
         with:
@@ -198,7 +210,7 @@ jobs:
             *Generated by [PR labeler](https://github.com/expo/expo/actions/workflows/pr-labeler.yml) 🤖*
 
       - name: 💬 Drop a comment
-        uses: marocchino/sticky-pull-request-comment@v3
+        uses: marocchino/sticky-pull-request-comment@0ea0beb66eb9baf113663a64ec522f60e49231c0 # v3.0.4
         if: failure()
         with:
           header: pull-request-eas-build-${{ steps.pr-info.outputs.head-sha }}
diff --git a/.github/workflows/pull-request-commit.yml b/.github/workflows/pull-request-commit.yml
index 976fa35662..df8a69c188 100644
--- a/.github/workflows/pull-request-commit.yml
+++ b/.github/workflows/pull-request-commit.yml
@@ -13,25 +13,28 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.event_name }}-${{ github.ref }}
   cancel-in-progress: true
 
-permissions:
-  pull-requests: write
-  actions: write
-  contents: read
+# Permissions are granted per-job below; anything unlisted defaults to none.
+# pull-requests: write is needed by sticky-pull-request-comment to post the
+# bundle-size and fingerprint diffs
+permissions: {}
 
 jobs:
   webpack-analyzer:
     runs-on: ubuntu-22.04
     if: ${{ github.event.pull_request.head.repo.full_name == github.repository && github.event_name == 'pull_request'}}
+    permissions:
+      contents: read
+      pull-requests: write
     steps:
       - name: ⬇️ Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
         with:
           fetch-depth: 0
 
-      - uses: pnpm/action-setup@v6
+      - uses: pnpm/action-setup@0ebf47130e4866e96fce0953f49152a61190b271 # v6.0.9
 
       - name: 🔧 Setup Node
-        uses: actions/setup-node@v6
+        uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
         with:
           node-version-file: package.json
           cache: pnpm
@@ -68,7 +71,7 @@ jobs:
 
       - name: ⬇️ Get base stats from cache
         id: get-base-stats
-        uses: actions/cache@v5
+        uses: actions/cache@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5.0.5
         with:
           path: stats-base.json
           key: stats-base-${{ steps.base-commit.outputs.base-commit }}
@@ -89,14 +92,14 @@ jobs:
 
       - name: ％ Get diff
         id: get-diff
-        uses: NejcZdovc/bundle-size-diff@v1
+        uses: NejcZdovc/bundle-size-diff@5321de41d2d62a7b0f4d6e60f59d1280a0034160 # v1.1.0
         with:
           base_path: "stats-base.json"
           pr_path: "../stats-new.json"
           excluded_assets: "(.+).chunk.js|(.+).js.map|(.+).json|(.+).png|(.+).svg|(.+).webp|(.+).jpg|(.+).ico"
 
       - name: 💬 Drop a comment
-        uses: marocchino/sticky-pull-request-comment@v3
+        uses: marocchino/sticky-pull-request-comment@0ea0beb66eb9baf113663a64ec522f60e49231c0 # v3.0.4
         with:
           header: bundle-diff
           message: |
@@ -108,9 +111,12 @@ jobs:
   fingerprint-native:
     runs-on: ubuntu-22.04
     if: ${{ github.event.pull_request.head.repo.full_name == github.repository && github.event_name == 'pull_request'}}
+    permissions:
+      contents: read
+      pull-requests: write
     steps:
       - name: ⬇️ Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
         with:
           fetch-depth: 100
 
@@ -118,22 +124,22 @@ jobs:
         run: git fetch origin main:main --depth 100
         if: github.event_name == 'pull_request'
 
-      - uses: pnpm/action-setup@v6
+      - uses: pnpm/action-setup@0ebf47130e4866e96fce0953f49152a61190b271 # v6.0.9
 
       - name: 🔧 Setup Node
-        uses: actions/setup-node@v6
+        uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
         with:
           node-version-file: package.json
           cache: pnpm
 
       - name: 📷 Check fingerprint and install dependencies
         id: fingerprint
-        uses: bluesky-social/github-actions/fingerprint-native@main
+        uses: bluesky-social/github-actions/fingerprint-native@ebc6aa6d7466dc1e78b1e832041b7b81f6f95030 # v0.1.0
         with:
           profile: pull-request
 
       - name: 💬 Drop a comment
-        uses: marocchino/sticky-pull-request-comment@v3
+        uses: marocchino/sticky-pull-request-comment@0ea0beb66eb9baf113663a64ec522f60e49231c0 # v3.0.4
         if: ${{ steps.fingerprint.outputs.includes-changes }}
         with:
           header: fingerprint-diff
@@ -151,7 +157,7 @@ jobs:
             *Generated by [PR labeler](https://github.com/expo/expo/actions/workflows/pr-labeler.yml) 🤖*
 
       - name: 💬 Delete comment
-        uses: marocchino/sticky-pull-request-comment@v3
+        uses: marocchino/sticky-pull-request-comment@0ea0beb66eb9baf113663a64ec522f60e49231c0 # v3.0.4
         if: ${{ !steps.fingerprint.outputs.includes-changes }}
         with:
           header: fingerprint-diff
diff --git a/.github/workflows/sync-internal.yaml b/.github/workflows/sync-internal.yaml
index 03120eaebc..3b07ae2b90 100644
--- a/.github/workflows/sync-internal.yaml
+++ b/.github/workflows/sync-internal.yaml
@@ -4,22 +4,29 @@ on:
   push:
     branches: [main]
 
+# The push to the internal repo uses the app token below, not the GITHUB_TOKEN
+permissions:
+  contents: read
+
 jobs:
   sync:
     runs-on: ubuntu-latest
     if: github.repository == 'bluesky-social/social-app'
     steps:
       - name: Checkout public repo
-        uses: actions/checkout@v5
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
         with:
           fetch-depth: 0
       - name: Generate GitHub App Token
         id: app-token
-        uses: actions/create-github-app-token@v3
+        uses: actions/create-github-app-token@bcd2ba49218906704ab6c1aa796996da409d3eb1 # v3.2.0
         with:
           app-id: ${{ vars.SYNC_INTERNAL_APP_ID }}
           private-key: ${{ secrets.SYNC_INTERNAL_PK }}
           repositories: social-app-internal
+          # Scope the token down from the app's full installation permissions;
+          # pushing is the only thing this token is used for
+          permission-contents: write
       - name: Push to internal repo
         env:
           TOKEN: ${{ steps.app-token.outputs.token }}
diff --git a/.github/workflows/verify-pnpm-lock.yml b/.github/workflows/verify-pnpm-lock.yml
index f1b61e95e7..cb68e2b4e7 100644
--- a/.github/workflows/verify-pnpm-lock.yml
+++ b/.github/workflows/verify-pnpm-lock.yml
@@ -6,13 +6,16 @@ concurrency:
   group: "${{ github.workflow }}-${{ github.head_ref || github.ref }}"
   cancel-in-progress: true
 
+permissions:
+  contents: read
+
 jobs:
   verify-pnpm-lock:
     name: No manual pnpm-lock.yaml edits
     runs-on: ubuntu-latest
     steps:
       - name: Check out PR HEAD
-        uses: actions/checkout@v5
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
         with:
           fetch-depth: 0
 
@@ -21,10 +24,10 @@ jobs:
           BASE_REF: ${{ github.base_ref }}
         run: git fetch origin $BASE_REF --depth=1
 
-      - uses: pnpm/action-setup@v6
+      - uses: pnpm/action-setup@0ebf47130e4866e96fce0953f49152a61190b271 # v6.0.9
 
       - name: Install node
-        uses: actions/setup-node@v6
+        uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
         with:
           node-version-file: package.json
 
diff --git a/.github/workflows/zizmor.yml b/.github/workflows/zizmor.yml
new file mode 100644
index 0000000000..56d06bbd85
--- /dev/null
+++ b/.github/workflows/zizmor.yml
@@ -0,0 +1,37 @@
+name: Workflow security
+
+on:
+  push:
+    branches: [main]
+    paths: [".github/**"]
+  pull_request:
+    paths: [".github/**"]
+
+concurrency:
+  group: "${{ github.workflow }}-${{ github.head_ref || github.ref }}"
+  cancel-in-progress: true
+
+# The github.token is only used by zizmor's online audits (read-only API calls)
+permissions:
+  contents: read
+
+jobs:
+  zizmor:
+    name: Audit workflows with zizmor
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out Git repository
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+        with:
+          persist-credentials: false
+
+      - name: Run zizmor
+        uses: zizmorcore/zizmor-action@5f14fd08f7cf1cb1609c1e344975f152c7ee938d # v0.5.6
+        with:
+          # Annotate the PR directly instead of uploading SARIF to the
+          # security tab, and fail the check on any finding
+          advanced-security: false
+          annotations: true
+          # Low-confidence findings (e.g. artipacked on workflows that never
+          # push) are too noisy to gate CI on
+          min-confidence: medium
diff --git a/package.json b/package.json
index 7d61fb5264..a543300494 100644
--- a/package.json
+++ b/package.json
@@ -90,7 +90,8 @@
     "generate-webpack-stats-file": "EXPO_PUBLIC_GENERATE_STATS=1 pnpm build-web",
     "open-analyzer": "EXPO_PUBLIC_OPEN_ANALYZER=1 pnpm build-web",
     "icons:optimize": "svgo -f ./assets/icons",
-    "prettier": "prettier --check ."
+    "prettier": "prettier --check .",
+    "update-actions": "pnpm dlx actions-up --min-age 7"
   },
   "dependencies": {
     "@atproto/api": "0.20.15",