diff --git a/.github/workflows/000-codeql.yaml b/.github/workflows/000-codeql.yaml
index 60fe190..5310902 100644
--- a/.github/workflows/000-codeql.yaml
+++ b/.github/workflows/000-codeql.yaml
@@ -23,6 +23,9 @@ on:
   schedule:
     - cron: '41 9 * * 1'
 
+permissions:
+  contents: read
+
 jobs:
   analyze:
     name: Analyze
@@ -42,12 +45,17 @@ jobs:
         # Learn more about CodeQL language support at https://aka.ms/codeql-docs/language-support
 
     steps:
+    - name: Harden Runner
+      uses: step-security/harden-runner@0d381219ddf674d61a7572ddd19d7941e271515c # v2.9.0
+      with:
+        egress-policy: audit
+
     - name: Checkout repository
-      uses: actions/checkout@v3
+      uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3.6.0
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
-      uses: github/codeql-action/init@v2
+      uses: github/codeql-action/init@3e0e84636c6f5df46a2cb232ae1dd1384713150d # v2.25.15
       with:
         languages: ${{ matrix.language }}
         # If you wish to specify custom queries, you can do so here or in a config file.
@@ -75,7 +83,7 @@ jobs:
         ${GITHUB_WORKSPACE}/ux-src/MkGCC.sh ${GITHUB_WORKSPACE}/ux-src
 
     - name: Perform CodeQL Analysis
-      uses: github/codeql-action/analyze@v2
+      uses: github/codeql-action/analyze@3e0e84636c6f5df46a2cb232ae1dd1384713150d # v2.25.15
       with:
         category: "/language:${{matrix.language}}"
         
\ No newline at end of file
diff --git a/.github/workflows/001-flawfinder.yaml b/.github/workflows/001-flawfinder.yaml
index 0d8175e..63e225d 100644
--- a/.github/workflows/001-flawfinder.yaml
+++ b/.github/workflows/001-flawfinder.yaml
@@ -17,6 +17,9 @@ on:
   schedule:
     - cron: '45 19 * * 1'
 
+permissions:
+  contents: read
+
 jobs:
   flawfinder:
     name: Flawfinder
@@ -26,8 +29,13 @@ jobs:
       contents: read
       security-events: write
     steps:
+      - name: Harden Runner
+        uses: step-security/harden-runner@0d381219ddf674d61a7572ddd19d7941e271515c # v2.9.0
+        with:
+          egress-policy: audit
+
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3.6.0
 
       - name: Prepare RISC OS source tree
         run: bash ${GITHUB_WORKSPACE}/.rocog/scripts/ux-src gen github ${GITHUB_WORKSPACE}
@@ -39,4 +47,4 @@ jobs:
           output: 'flawfinder_results.sarif'
 
       - name: Upload analysis results to GitHub Security tab
-        uses: github/codeql-action/upload-sarif@v2
\ No newline at end of file
+        uses: github/codeql-action/upload-sarif@3e0e84636c6f5df46a2cb232ae1dd1384713150d # v2.25.15
\ No newline at end of file
diff --git a/.github/workflows/dependency-review.yml b/.github/workflows/dependency-review.yml
new file mode 100644
index 0000000..f072eab
--- /dev/null
+++ b/.github/workflows/dependency-review.yml
@@ -0,0 +1,27 @@
+# Dependency Review Action
+#
+# This Action will scan dependency manifest files that change as part of a Pull Request,
+# surfacing known-vulnerable versions of the packages declared or updated in the PR.
+# Once installed, if the workflow run is marked as required,
+# PRs introducing known-vulnerable packages will be blocked from merging.
+#
+# Source repository: https://github.com/actions/dependency-review-action
+name: 'Dependency Review'
+on: [pull_request]
+
+permissions:
+  contents: read
+
+jobs:
+  dependency-review:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Harden Runner
+        uses: step-security/harden-runner@0d381219ddf674d61a7572ddd19d7941e271515c # v2.9.0
+        with:
+          egress-policy: audit
+
+      - name: 'Checkout Repository'
+        uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
+      - name: 'Dependency Review'
+        uses: actions/dependency-review-action@5a2ce3f5b92ee19cbb1541a4984c76d921601d7c # v4.3.4
diff --git a/.github/workflows/scorecards.yml b/.github/workflows/scorecards.yml
new file mode 100644
index 0000000..7dce4f6
--- /dev/null
+++ b/.github/workflows/scorecards.yml
@@ -0,0 +1,76 @@
+# This workflow uses actions that are not certified by GitHub. They are provided
+# by a third-party and are governed by separate terms of service, privacy
+# policy, and support documentation.
+
+name: Scorecard supply-chain security
+on:
+  # For Branch-Protection check. Only the default branch is supported. See
+  # https://github.com/ossf/scorecard/blob/main/docs/checks.md#branch-protection
+  branch_protection_rule:
+  # To guarantee Maintained check is occasionally updated. See
+  # https://github.com/ossf/scorecard/blob/main/docs/checks.md#maintained
+  schedule:
+    - cron: '20 7 * * 2'
+  push:
+    branches: ["main"]
+
+# Declare default permissions as read only.
+permissions: read-all
+
+jobs:
+  analysis:
+    name: Scorecard analysis
+    runs-on: ubuntu-latest
+    permissions:
+      # Needed to upload the results to code-scanning dashboard.
+      security-events: write
+      # Needed to publish results and get a badge (see publish_results below).
+      id-token: write
+      contents: read
+      actions: read
+
+    steps:
+      - name: Harden Runner
+        uses: step-security/harden-runner@0d381219ddf674d61a7572ddd19d7941e271515c # v2.9.0
+        with:
+          egress-policy: audit
+
+      - name: "Checkout code"
+        uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
+        with:
+          persist-credentials: false
+
+      - name: "Run analysis"
+        uses: ossf/scorecard-action@dc50aa9510b46c811795eb24b2f1ba02a914e534 # v2.3.3
+        with:
+          results_file: results.sarif
+          results_format: sarif
+          # (Optional) "write" PAT token. Uncomment the `repo_token` line below if:
+          # - you want to enable the Branch-Protection check on a *public* repository, or
+          # - you are installing Scorecards on a *private* repository
+          # To create the PAT, follow the steps in https://github.com/ossf/scorecard-action#authentication-with-pat.
+          # repo_token: ${{ secrets.SCORECARD_TOKEN }}
+
+          # Public repositories:
+          #   - Publish results to OpenSSF REST API for easy access by consumers
+          #   - Allows the repository to include the Scorecard badge.
+          #   - See https://github.com/ossf/scorecard-action#publishing-results.
+          # For private repositories:
+          #   - `publish_results` will always be set to `false`, regardless
+          #     of the value entered here.
+          publish_results: true
+
+      # Upload the results as artifacts (optional). Commenting out will disable uploads of run results in SARIF
+      # format to the repository Actions tab.
+      - name: "Upload artifact"
+        uses: actions/upload-artifact@89ef406dd8d7e03cfd12d9e0a4a378f454709029 # v4.3.5
+        with:
+          name: SARIF file
+          path: results.sarif
+          retention-days: 5
+
+      # Upload the results to GitHub's code scanning dashboard.
+      - name: "Upload to code-scanning"
+        uses: github/codeql-action/upload-sarif@afb54ba388a7dca6ecae48f608c4ff05ff4cc77a # v3.25.15
+        with:
+          sarif_file: results.sarif
diff --git a/.github/workflows/sync-from-template.yaml b/.github/workflows/sync-from-template.yaml
index fe46ebe..777714a 100644
--- a/.github/workflows/sync-from-template.yaml
+++ b/.github/workflows/sync-from-template.yaml
@@ -34,6 +34,9 @@ env:
   REPO_TEMPLATE: RISC-OS-Community/StandardRepoTemplate
   THIS_REPO: ${{ github.repository }}
 
+permissions:
+  contents: read
+
 jobs:
   sync-from-template:
     # Do not run on the template repository itself
@@ -50,8 +53,13 @@ jobs:
 
     steps:
       # Clone the template repository
+      - name: Harden Runner
+        uses: step-security/harden-runner@0d381219ddf674d61a7572ddd19d7941e271515c # v2.9.0
+        with:
+          egress-policy: audit
+
       - name: Check out template repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@ee0669bd1cc54295c223e0bb666b733df41de1c5 # v2.7.0
         with:
           repository: ${{ env.REPO_TEMPLATE }}
           token: ${{ github.token }}
@@ -65,7 +73,7 @@ jobs:
 
       # Clone the target repository. Check out a branch
       - name: Check out ${{ github.repository }}
-        uses: actions/checkout@v2
+        uses: actions/checkout@ee0669bd1cc54295c223e0bb666b733df41de1c5 # v2.7.0
         with:
           repository: ${{ github.repository }}
           token: ${{ github.token }}
diff --git a/.github/workflows/tweet-pull-request.yaml b/.github/workflows/tweet-pull-request.yaml
index ed87c73..e8160a8 100644
--- a/.github/workflows/tweet-pull-request.yaml
+++ b/.github/workflows/tweet-pull-request.yaml
@@ -25,6 +25,9 @@ on:
 env:
   THIS_REPO: ${{ github.repository }}
 
+permissions:
+  contents: read
+
 jobs:
 #  init:
 #    runs-on: ubuntu-latest
@@ -42,10 +45,15 @@ jobs:
   tweet:
     runs-on: ubuntu-latest
     steps:
+      - name: Harden Runner
+        uses: step-security/harden-runner@0d381219ddf674d61a7572ddd19d7941e271515c # v2.9.0
+        with:
+          egress-policy: audit
+
       - name: Set current date as env variable
         run: echo "MSG_DATE=$(date +'%Y-%m-%d')" >> $GITHUB_ENV
       - name: Send Tweet
-        uses: ethomson/send-tweet-action@v1
+        uses: ethomson/send-tweet-action@288f9339e0412e3038dce350e0da5ecdf12133a6 # v1.0.0
         with:
           status: "🎉 Today: ${{ env.MSG_DATE }}, new merge in ${{ env.THIS_REPO }}! ${{ github.event.pull_request.title }} You can check it out here: https://github.com/${{ env.THIS_REPO }} #RISC_OS #RISCOS #ROCOnGitHub #OpenSource #DevCommunity" 
           consumer-key: ${{ secrets.TWITTER_CONSUMER_API_KEY }}
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
new file mode 100644
index 0000000..d8562a4
--- /dev/null
+++ b/.pre-commit-config.yaml
@@ -0,0 +1,14 @@
+repos:
+- repo: https://github.com/gitleaks/gitleaks
+  rev: v8.16.3
+  hooks:
+  - id: gitleaks
+- repo: https://github.com/jumanjihouse/pre-commit-hooks
+  rev: 3.0.0
+  hooks:
+  - id: shellcheck
+- repo: https://github.com/pre-commit/pre-commit-hooks
+  rev: v4.4.0
+  hooks:
+  - id: end-of-file-fixer
+  - id: trailing-whitespace