diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000..c6ee553
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,10 @@
+---
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: /
+    schedule:
+      interval: daily
+      time: "11:00"
+    commit-message:
+      prefix: "gh-actions:"
diff --git a/.github/workflows/build-image-test.yaml b/.github/workflows/build-image-test.yaml
index f83e11e..c7223f0 100644
--- a/.github/workflows/build-image-test.yaml
+++ b/.github/workflows/build-image-test.yaml
@@ -9,13 +9,13 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
+      - uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5.0.1
         with:
           fetch-depth: 0
 
       - name: Get changed Dockerfile
         id: changed-files-specific
-        uses: tj-actions/changed-files@2c85495a7bb72f2734cb5181e29b2ee5e08e61f7 # v13.1
+        uses: tj-actions/changed-files@22103cc46bda19c2b464ffe86db46df6922fd323 # v47.0.5
         with:
           files: |
             Dockerfile
@@ -52,7 +52,7 @@ jobs:
 
       - name: Dive - check image for waste files
         if: steps.changed-files-specific.outputs.any_changed == 'true'
-        uses: MaxymVlasov/dive-action@0035999cae50d4ef657ac94be84f01812aa192a5 # v0.1.0
+        uses: MaxymVlasov/dive-action@fafb796951b322cc4926b8a5eafda89ab9de8edf # v1.5.1
         with:
           image: ghcr.io/${{ github.repository }}:${{ env.IMAGE_TAG }}
           config-file: ${{ github.workspace }}/.github/.dive-ci.yaml
diff --git a/.github/workflows/build-image.yaml b/.github/workflows/build-image.yaml
index 2d0c497..a79e218 100644
--- a/.github/workflows/build-image.yaml
+++ b/.github/workflows/build-image.yaml
@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5.0.1
 
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v3
@@ -22,7 +22,7 @@ jobs:
         uses: docker/setup-buildx-action@v3
 
       - name: Login to ghcr.io
-        uses: docker/login-action@v3
+        uses: docker/login-action@v4
         with:
           registry: ghcr.io
           username: ${{ github.repository_owner }}
@@ -66,7 +66,7 @@ jobs:
             "github_token=${{ secrets.GITHUB_TOKEN }}"
 
       - name: Login to DockerHub Container Registry
-        uses: docker/login-action@v3
+        uses: docker/login-action@v4
         with:
           registry: registry.hub.docker.com
           username: ${{ secrets.DOCKERHUB_USER }}
@@ -98,4 +98,3 @@ jobs:
           tags: |
             registry.hub.docker.com/tofuutils/pre-commit-opentofu:nightly
           provenance: false
-
diff --git a/.github/workflows/pr-title.yml b/.github/workflows/pr-title.yml
index 7a8b642..3d86d51 100644
--- a/.github/workflows/pr-title.yml
+++ b/.github/workflows/pr-title.yml
@@ -14,7 +14,7 @@ jobs:
     steps:
       # Please look up the latest version from
       # https://github.com/amannn/action-semantic-pull-request/releases
-      - uses: amannn/action-semantic-pull-request@e9fabac35e210fea40ca5b14c0da95a099eff26f # v5.4.0
+      - uses: amannn/action-semantic-pull-request@48f256284bd46cdaab1048c3721360e808335d50 # v6.1.1
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         with:
diff --git a/.github/workflows/pre-commit.yaml b/.github/workflows/pre-commit.yaml
index 1085384..b0566cf 100644
--- a/.github/workflows/pre-commit.yaml
+++ b/.github/workflows/pre-commit.yaml
@@ -6,7 +6,7 @@ jobs:
   pre-commit:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
+    - uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5.0.1
     - run: |
         git fetch --no-tags --prune --depth=1 origin +refs/heads/*:refs/remotes/origin/*
 
@@ -27,20 +27,24 @@ jobs:
         sudo apt update && sudo apt install shellcheck
 
     - name: Install hadolint
+      env:
+        GH_TOKEN: ${{ github.token }}
       run: |
-        curl -L "$(curl -s https://api.github.com/repos/hadolint/hadolint/releases/latest | grep -o -E -m 1 "https://.+?/hadolint-Linux-x86_64")" > hadolint \
-        && chmod +x hadolint && sudo mv hadolint /usr/bin/
+        gh release download v2.14.0 --repo hadolint/hadolint --pattern "hadolint-linux-x86_64"
+        mv hadolint-linux-x86_64 hadolint
+        chmod +x hadolint
+        sudo mv hadolint /usr/bin/
     # Need to success pre-commit fix push
-    - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
+    - uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5.0.1
       with:
         fetch-depth: 0
         ref: ${{ github.event.pull_request.head.sha }}
     # Skip tofu_tflint which interferes to commit pre-commit auto-fixes
-    - uses: actions/setup-python@0a5c61591373683505ea898e09a3ea4f39ef2b9c # v5.0.0
+    - uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v6.0.0
       with:
         python-version: '3.9'
     - name: Execute pre-commit
-      uses: pre-commit/action@9b88afc9cd57fd75b655d5c71bd38146d07135fe # v2.0.3
+      uses: pre-commit/action@576ff52938d158a24ac7e009dfa94b1455e7df99
       env:
         SKIP: no-commit-to-branch,hadolint
       with:
@@ -49,7 +53,7 @@ jobs:
     # Run only skipped checks
     - name: Execute pre-commit check that have no auto-fixes
       if: always()
-      uses: pre-commit/action@9b88afc9cd57fd75b655d5c71bd38146d07135fe # v2.0.3
+      uses: pre-commit/action@576ff52938d158a24ac7e009dfa94b1455e7df99
       env:
         SKIP: check-added-large-files,check-merge-conflict,check-vcs-permalinks,forbid-new-submodules,no-commit-to-branch,end-of-file-fixer,trailing-whitespace,check-yaml,check-merge-conflict,check-executables-have-shebangs,check-case-conflict,mixed-line-ending,detect-aws-credentials,detect-private-key,shfmt,shellcheck
       with:
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 4aa0df1..35b8f62 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -18,13 +18,13 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
+        uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5.0.1
         with:
           persist-credentials: false
           fetch-depth: 0
 
       - name: Release
-        uses: cycjimmy/semantic-release-action@61680d0e9b02ff86f5648ade99e01be17f0260a4 # v4.0.0
+        uses: cycjimmy/semantic-release-action@b12c8f6015dc215fe37bc154d4ad456dd3833c90 # v6.0.0
         with:
           semantic_version: 18.0.0
           extra_plugins: |
diff --git a/.github/workflows/stale-actions.yaml b/.github/workflows/stale-actions.yaml
index 32f08e7..d797c08 100644
--- a/.github/workflows/stale-actions.yaml
+++ b/.github/workflows/stale-actions.yaml
@@ -7,7 +7,7 @@ jobs:
   stale:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/stale@28ca1036281a5e5922ead5184a1bbf96e5fc984e # v9.0.0
+    - uses: actions/stale@3a9db7e6a41a89f618792c92c0e97cc736e1b13f # v10.0.0
       with:
         repo-token: ${{ secrets.GITHUB_TOKEN }}
         # Staling issues and PR's
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 17fc5a6..e801df2 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,6 +1,6 @@
 repos:
 - repo: https://github.com/pre-commit/pre-commit-hooks
-  rev: v4.5.0
+  rev: v6.0.0
   hooks:
     # Git style
     - id: check-added-large-files
diff --git a/.pre-commit-hooks.yaml b/.pre-commit-hooks.yaml
index 0dbc918..d60a3e5 100644
--- a/.pre-commit-hooks.yaml
+++ b/.pre-commit-hooks.yaml
@@ -4,7 +4,7 @@
   entry: hooks/infracost_breakdown.sh
   language: script
   require_serial: true
-  files: \.(tf(vars)?|hcl)$
+  files: \.(tf|tofu|tfvars|hcl)$
   exclude: \.terraform\/.*$
 
 - id: tofu_fmt
@@ -12,25 +12,29 @@
   description: Rewrites all OpenTofu configuration files to a canonical format.
   entry: hooks/tofu_fmt.sh
   language: script
-  files: (\.tf|\.tfvars)$
+  files: \.(tf|tofu|tfvars|(tftest|tofutest|tfmock|tfquery)\.hcl)$
   exclude: \.terraform\/.*$
 
 - id: tofu_docs
   name: OpenTofu docs
-  description: Inserts input and output documentation into README.md (using terraform-docs).
+  description:
+    Inserts input and output documentation into README.md (using
+    terraform-docs).
   require_serial: true
   entry: hooks/tofu_docs.sh
   language: script
-  files: (\.tf|\.terraform\.lock\.hcl)$
+  files: \.(tf|tofu|terraform\.lock\.hcl)$
   exclude: \.terraform\/.*$
 
 - id: tofu_docs_without_aggregate_type_defaults
   name: OpenTofu docs (without aggregate type defaults)
-  description: Inserts input and output documentation into README.md (using terraform-docs). Identical to terraform_docs.
+  description:
+    Inserts input and output documentation into README.md (using
+    terraform-docs). Identical to terraform_docs.
   require_serial: true
   entry: hooks/tofu_docs.sh
   language: script
-  files: (\.tf)$
+  files: \.(tf|tofu)$
   exclude: \.terraform\/.*$
 
 - id: tofu_docs_replace
@@ -39,7 +43,7 @@
   require_serial: true
   entry: hooks/tofu_docs_replace.py
   language: python
-  files: (\.tf)$
+  files: \.(tf|tofu)$
   exclude: \.terraform\/.*$
 
 - id: tofu_validate
@@ -48,7 +52,7 @@
   require_serial: true
   entry: hooks/tofu_validate.sh
   language: script
-  files: (\.tf|\.tfvars)$
+  files: \.(tf|tofu|tfvars|terraform\.lock\.hcl)$
   exclude: \.terraform\/.*$
 
 - id: tofu_providers_lock
@@ -66,12 +70,13 @@
   require_serial: true
   entry: hooks/tofu_tflint.sh
   language: script
-  files: (\.tf|\.tfvars)$
+  files: \.(tf|tofu|tfvars)$
   exclude: \.terraform\/.*$
 
 - id: terragrunt_fmt
   name: Terragrunt fmt
-  description: Rewrites all Terragrunt configuration files to a canonical format.
+  description:
+    Rewrites all Terragrunt configuration files to a canonical format.
   entry: hooks/terragrunt_fmt.sh
   language: script
   files: (\.hcl)$
@@ -85,20 +90,30 @@
   files: (\.hcl)$
   exclude: \.terraform\/.*$
 
+- id: terragrunt_validate_inputs
+  name: Terragrunt validate inputs
+  description: Validates Terragrunt unused and undefined inputs.
+  entry: hooks/terragrunt_validate_inputs.sh
+  language: script
+  files: (\.hcl)$
+  exclude: \.terraform\/.*$
+
 - id: tofu_tfsec
   name: OpenTofu validate with tfsec (deprecated, use "tofu_trivy")
-  description: Static analysis of OpenTofu templates to spot potential security issues.
+  description:
+    Static analysis of OpenTofu templates to spot potential security issues.
   require_serial: true
   entry: hooks/tofu_tfsec.sh
-  files: \.tf(vars)?$
+  files: \.(tf|tofu|tfvars)$
   language: script
 
 - id: tofu_trivy
   name: OpenTofu validate with trivy
-  description: Static analysis of OpenTofu templates to spot potential security issues.
+  description:
+    Static analysis of OpenTofu templates to spot potential security issues.
   require_serial: true
   entry: hooks/tofu_trivy.sh
-  files: \.tf(vars)?$
+  files: \.(tf|tofu|tfvars)$
   language: script
 
 - id: checkov
@@ -108,7 +123,7 @@
   language: python
   pass_filenames: false
   always_run: false
-  files: \.tf$
+  files: \.(tf|tofu)$
   exclude: \.terraform\/.*$
   require_serial: true
 
@@ -118,7 +133,7 @@
   entry: hooks/tofu_checkov.sh
   language: script
   always_run: false
-  files: \.tf$
+  files: \.(tf|tofu)$
   exclude: \.terraform\/.*$
   require_serial: true
 
@@ -130,7 +145,7 @@
   pass_filenames: false
   always_run: false
   require_serial: true
-  files: \.tf$
+  files: \.(tf|tofu)$
   exclude: \.terraform\/.*$
 
 - id: terrascan
@@ -138,7 +153,7 @@
   description: Runs terrascan on OpenTofu templates.
   language: script
   entry: hooks/terrascan.sh
-  files: \.tf$
+  files: \.(tf|tofu)$
   exclude: \.terraform\/.*$
   require_serial: true
 
@@ -149,5 +164,5 @@
   entry: hooks/tfupdate.sh
   args:
     - --args=terraform
-  files: \.tf$
+  files: \.(tf|tofu)$
   require_serial: true
diff --git a/CHANGELOG.md b/CHANGELOG.md
index e02f1ca..2112ef2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,54 @@
 
 All notable changes to this project will be documented in this file.
 
+# [2.4.0](https://github.com/tofuutils/pre-commit-opentofu/compare/v2.3.0...v2.4.0) (2026-05-25)
+
+
+### Bug Fixes
+
+* expand file extension patterns for tofu hooks ([451aaa5](https://github.com/tofuutils/pre-commit-opentofu/commit/451aaa59b552eb3913629c835af8b6b568aab120))
+
+
+### Features
+
+* support .tofu file extension and update hooks/tools ([9624cc8](https://github.com/tofuutils/pre-commit-opentofu/commit/9624cc8f24177378449203194b4f0ee71bc6c1a0))
+
+# [2.3.0](https://github.com/tofuutils/pre-commit-opentofu/compare/v2.2.2...v2.3.0) (2026-04-21)
+
+
+### Features
+
+* add terragrunt_validate_inputs hook ([0ca9eca](https://github.com/tofuutils/pre-commit-opentofu/commit/0ca9eca3823420f31d09c62bf1672bea03ca3e07))
+
+## [2.2.2](https://github.com/tofuutils/pre-commit-opentofu/compare/v2.2.1...v2.2.2) (2025-10-22)
+
+
+### Bug Fixes
+
+* replace deprecated hclfmt with hcl format command ([f1a589b](https://github.com/tofuutils/pre-commit-opentofu/commit/f1a589bd124b277cc02fcbf04ee05017fb8822c0))
+
+## [2.2.1](https://github.com/tofuutils/pre-commit-opentofu/compare/v2.2.0...v2.2.1) (2025-06-04)
+
+
+### Bug Fixes
+
+* make infracost_breakdown.sh compatible with bash 3.2 (macOS) ([df886fa](https://github.com/tofuutils/pre-commit-opentofu/commit/df886fa772e7d1eedf5603327c0cf02968e7d779))
+* Update pre-commit/action version ([#30](https://github.com/tofuutils/pre-commit-opentofu/issues/30)) ([44c7b5d](https://github.com/tofuutils/pre-commit-opentofu/commit/44c7b5dec9362d2fe7ed5e8786f4d95956791d3d))
+
+# [2.2.0](https://github.com/tofuutils/pre-commit-opentofu/compare/v2.1.0...v2.2.0) (2025-03-29)
+
+
+### Features
+
+* make release ([e625db1](https://github.com/tofuutils/pre-commit-opentofu/commit/e625db13ec285e132f43cdf6e5aa3f3272e45451))
+
+# [2.1.0](https://github.com/tofuutils/pre-commit-opentofu/compare/v2.0.0...v2.1.0) (2024-10-16)
+
+
+### Features
+
+* support .tofu files ([#6](https://github.com/tofuutils/pre-commit-opentofu/issues/6)) ([e059c58](https://github.com/tofuutils/pre-commit-opentofu/commit/e059c5859bceddf1ca018f55851f6940ad51f1c2))
+
 # [2.0.0](https://github.com/tofuutils/pre-commit-opentofu/compare/v1.0.4...v2.0.0) (2024-09-25)
 
 
diff --git a/Dockerfile b/Dockerfile
index 39255fc..6699cb2 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -10,22 +10,22 @@ RUN apk add --no-cache \
     curl=~8 && \
     # Upgrade packages for be able get latest Checkov
     python3 -m pip install --no-cache-dir --upgrade \
-        pip \
-        setuptools
+    pip \
+    setuptools
 
 ARG PRE_COMMIT_VERSION=${PRE_COMMIT_VERSION:-latest}
-ARG TOFU_VERSION=${TOFU_VERSION:-1.6.1}
+ARG TOFU_VERSION=${TOFU_VERSION:-1.9.0}
 
 # Install pre-commit
 RUN [ ${PRE_COMMIT_VERSION} = "latest" ] && pip3 install --no-cache-dir pre-commit \
     || pip3 install --no-cache-dir pre-commit==${PRE_COMMIT_VERSION}
 
 RUN curl -LO https://github.com/opentofu/opentofu/releases/download/v${TOFU_VERSION}/tofu_${TOFU_VERSION}_${TARGETOS}_${TARGETARCH}.zip \
- && curl -LO https://github.com/opentofu/opentofu/releases/download/v${TOFU_VERSION}/tofu_${TOFU_VERSION}_SHA256SUMS \
- && [ $(sha256sum "tofu_${TOFU_VERSION}_${TARGETOS}_${TARGETARCH}.zip" | cut -f 1 -d ' ') = "$(grep "tofu_${TOFU_VERSION}_${TARGETOS}_${TARGETARCH}.zip" tofu_*_SHA256SUMS | cut -f 1 -d ' ')" ] \
- && unzip tofu_${TOFU_VERSION}_${TARGETOS}_${TARGETARCH}.zip -d /usr/bin/ \
- && rm "tofu_${TOFU_VERSION}_${TARGETOS}_${TARGETARCH}.zip" \
- && rm "tofu_${TOFU_VERSION}_SHA256SUMS"
+    && curl -LO https://github.com/opentofu/opentofu/releases/download/v${TOFU_VERSION}/tofu_${TOFU_VERSION}_SHA256SUMS \
+    && [ "$(sha256sum "tofu_${TOFU_VERSION}_${TARGETOS}_${TARGETARCH}.zip" | cut -f 1 -d ' ')" = "$(grep "tofu_${TOFU_VERSION}_${TARGETOS}_${TARGETARCH}.zip" tofu_*_SHA256SUMS | cut -f 1 -d ' ')" ] \
+    && unzip tofu_${TOFU_VERSION}_${TARGETOS}_${TARGETARCH}.zip -d /usr/bin/ \
+    && rm "tofu_${TOFU_VERSION}_${TARGETOS}_${TARGETARCH}.zip" \
+    && rm "tofu_${TOFU_VERSION}_SHA256SUMS"
 
 #
 # Install tools
@@ -47,18 +47,18 @@ ARG HCLEDIT_VERSION=${HCLEDIT_VERSION:-false}
 # specified in step below
 ARG INSTALL_ALL=${INSTALL_ALL:-false}
 RUN if [ "$INSTALL_ALL" != "false" ]; then \
-        echo "export CHECKOV_VERSION=latest" >> /.env && \
-        echo "export INFRACOST_VERSION=latest" >> /.env && \
-        echo "export TERRAFORM_DOCS_VERSION=latest" >> /.env && \
-        echo "export TERRAGRUNT_VERSION=latest" >> /.env && \
-        echo "export TERRASCAN_VERSION=latest" >> /.env && \
-        echo "export TFLINT_VERSION=latest" >> /.env && \
-        echo "export TFSEC_VERSION=latest" >> /.env && \
-        echo "export TRIVY_VERSION=latest" >> /.env && \
-        echo "export TFUPDATE_VERSION=latest" >> /.env && \
-        echo "export HCLEDIT_VERSION=latest" >> /.env \
+    echo "export CHECKOV_VERSION=latest" >> /.env && \
+    echo "export INFRACOST_VERSION=latest" >> /.env && \
+    echo "export TERRAFORM_DOCS_VERSION=latest" >> /.env && \
+    echo "export TERRAGRUNT_VERSION=latest" >> /.env && \
+    echo "export TERRASCAN_VERSION=latest" >> /.env && \
+    echo "export TFLINT_VERSION=latest" >> /.env && \
+    echo "export TFSEC_VERSION=latest" >> /.env && \
+    echo "export TRIVY_VERSION=latest" >> /.env && \
+    echo "export TFUPDATE_VERSION=latest" >> /.env && \
+    echo "export HCLEDIT_VERSION=latest" >> /.env \
     ; else \
-        touch /.env \
+    touch /.env \
     ; fi
 
 
@@ -66,10 +66,10 @@ RUN if [ "$INSTALL_ALL" != "false" ]; then \
 RUN . /.env && \
     if [ "$CHECKOV_VERSION" != "false" ]; then \
     ( \
-        apk add --no-cache gcc=~12 libffi-dev=~3 musl-dev=~1; \
-        [ "$CHECKOV_VERSION" = "latest" ] && pip3 install --no-cache-dir checkov \
-        || pip3 install --no-cache-dir checkov==${CHECKOV_VERSION}; \
-        apk del gcc libffi-dev musl-dev \
+    apk add --no-cache gcc=~12 libffi-dev=~3 musl-dev=~1; \
+    [ "$CHECKOV_VERSION" = "latest" ] && pip3 install --no-cache-dir checkov \
+    || pip3 install --no-cache-dir checkov==${CHECKOV_VERSION}; \
+    apk del gcc libffi-dev musl-dev \
     ) \
     ; fi
 
@@ -77,9 +77,9 @@ RUN . /.env && \
 RUN . /.env && \
     if [ "$INFRACOST_VERSION" != "false" ]; then \
     ( \
-        INFRACOST_RELEASES="https://api.github.com/repos/infracost/infracost/releases" && \
-        [ "$INFRACOST_VERSION" = "latest" ] && curl -L "$(curl -s ${INFRACOST_RELEASES}/latest | grep -o -E -m 1 "https://.+?-${TARGETOS}-${TARGETARCH}.tar.gz")" > infracost.tgz \
-        || curl -L "$(curl -s ${INFRACOST_RELEASES} | grep -o -E "https://.+?v${INFRACOST_VERSION}/infracost-${TARGETOS}-${TARGETARCH}.tar.gz")" > infracost.tgz \
+    INFRACOST_RELEASES="https://api.github.com/repos/infracost/infracost/releases" && \
+    [ "$INFRACOST_VERSION" = "latest" ] && curl -L "$(curl -s ${INFRACOST_RELEASES}/latest | grep -o -E -m 1 "https://.+?-${TARGETOS}-${TARGETARCH}.tar.gz")" > infracost.tgz \
+    || curl -L "$(curl -s ${INFRACOST_RELEASES} | grep -o -E "https://.+?v${INFRACOST_VERSION}/infracost-${TARGETOS}-${TARGETARCH}.tar.gz")" > infracost.tgz \
     ) && tar -xzf infracost.tgz && rm infracost.tgz && mv infracost-${TARGETOS}-${TARGETARCH} infracost \
     ; fi
 
@@ -87,9 +87,9 @@ RUN . /.env && \
 RUN . /.env && \
     if [ "$TERRAFORM_DOCS_VERSION" != "false" ]; then \
     ( \
-        TERRAFORM_DOCS_RELEASES="https://api.github.com/repos/terraform-docs/terraform-docs/releases" && \
-        [ "$TERRAFORM_DOCS_VERSION" = "latest" ] && curl -L "$(curl -s ${TERRAFORM_DOCS_RELEASES}/latest | grep -o -E -m 1 "https://.+?-${TARGETOS}-${TARGETARCH}.tar.gz")" > terraform-docs.tgz \
-        || curl -L "$(curl -s ${TERRAFORM_DOCS_RELEASES} | grep -o -E "https://.+?v${TERRAFORM_DOCS_VERSION}-${TARGETOS}-${TARGETARCH}.tar.gz")" > terraform-docs.tgz \
+    TERRAFORM_DOCS_RELEASES="https://api.github.com/repos/terraform-docs/terraform-docs/releases" && \
+    [ "$TERRAFORM_DOCS_VERSION" = "latest" ] && curl -L "$(curl -s ${TERRAFORM_DOCS_RELEASES}/latest | grep -o -E -m 1 "https://.+?-${TARGETOS}-${TARGETARCH}.tar.gz")" > terraform-docs.tgz \
+    || curl -L "$(curl -s ${TERRAFORM_DOCS_RELEASES} | grep -o -E "https://.+?v${TERRAFORM_DOCS_VERSION}-${TARGETOS}-${TARGETARCH}.tar.gz")" > terraform-docs.tgz \
     ) && tar -xzf terraform-docs.tgz terraform-docs && rm terraform-docs.tgz && chmod +x terraform-docs \
     ; fi
 
@@ -97,9 +97,9 @@ RUN . /.env && \
 RUN . /.env \
     && if [ "$TERRAGRUNT_VERSION" != "false" ]; then \
     ( \
-        TERRAGRUNT_RELEASES="https://api.github.com/repos/gruntwork-io/terragrunt/releases" && \
-        [ "$TERRAGRUNT_VERSION" = "latest" ] && curl -L "$(curl -s ${TERRAGRUNT_RELEASES}/latest | grep -o -E -m 1 "https://.+?/terragrunt_${TARGETOS}_${TARGETARCH}")" > terragrunt \
-        || curl -L "$(curl -s ${TERRAGRUNT_RELEASES} | grep -o -E -m 1 "https://.+?v${TERRAGRUNT_VERSION}/terragrunt_${TARGETOS}_${TARGETARCH}")" > terragrunt \
+    TERRAGRUNT_RELEASES="https://api.github.com/repos/gruntwork-io/terragrunt/releases" && \
+    [ "$TERRAGRUNT_VERSION" = "latest" ] && curl -L "$(curl -s ${TERRAGRUNT_RELEASES}/latest | grep -o -E -m 1 "https://.+?/terragrunt_${TARGETOS}_${TARGETARCH}")" > terragrunt \
+    || curl -L "$(curl -s ${TERRAGRUNT_RELEASES} | grep -o -E -m 1 "https://.+?v${TERRAGRUNT_VERSION}/terragrunt_${TARGETOS}_${TARGETARCH}")" > terragrunt \
     ) && chmod +x terragrunt \
     ; fi
 
@@ -111,9 +111,9 @@ RUN . /.env && \
     # Convert the first letter to Uppercase
     OS="$(echo ${TARGETOS} | cut -c1 | tr '[:lower:]' '[:upper:]' | xargs echo -n; echo ${TARGETOS} | cut -c2-)"; \
     ( \
-        TERRASCAN_RELEASES="https://api.github.com/repos/tenable/terrascan/releases" && \
-        [ "$TERRASCAN_VERSION" = "latest" ] && curl -L "$(curl -s ${TERRASCAN_RELEASES}/latest | grep -o -E -m 1 "https://.+?_${OS}_${ARCH}.tar.gz")" > terrascan.tar.gz \
-        || curl -L "$(curl -s ${TERRASCAN_RELEASES} | grep -o -E "https://.+?${TERRASCAN_VERSION}_${OS}_${ARCH}.tar.gz")" > terrascan.tar.gz \
+    TERRASCAN_RELEASES="https://api.github.com/repos/tenable/terrascan/releases" && \
+    [ "$TERRASCAN_VERSION" = "latest" ] && curl -L "$(curl -s ${TERRASCAN_RELEASES}/latest | grep -o -E -m 1 "https://.+?_${OS}_${ARCH}.tar.gz")" > terrascan.tar.gz \
+    || curl -L "$(curl -s ${TERRASCAN_RELEASES} | grep -o -E "https://.+?${TERRASCAN_VERSION}_${OS}_${ARCH}.tar.gz")" > terrascan.tar.gz \
     ) && tar -xzf terrascan.tar.gz terrascan && rm terrascan.tar.gz && \
     ./terrascan init \
     ; fi
@@ -122,9 +122,9 @@ RUN . /.env && \
 RUN . /.env && \
     if [ "$TFLINT_VERSION" != "false" ]; then \
     ( \
-        TFLINT_RELEASES="https://api.github.com/repos/terraform-linters/tflint/releases" && \
-        [ "$TFLINT_VERSION" = "latest" ] && curl -L "$(curl -s ${TFLINT_RELEASES}/latest | grep -o -E -m 1 "https://.+?_${TARGETOS}_${TARGETARCH}.zip")" > tflint.zip \
-        || curl -L "$(curl -s ${TFLINT_RELEASES} | grep -o -E "https://.+?/v${TFLINT_VERSION}/tflint_${TARGETOS}_${TARGETARCH}.zip")" > tflint.zip \
+    TFLINT_RELEASES="https://api.github.com/repos/terraform-linters/tflint/releases" && \
+    [ "$TFLINT_VERSION" = "latest" ] && curl -L "$(curl -s ${TFLINT_RELEASES}/latest | grep -o -E -m 1 "https://.+?_${TARGETOS}_${TARGETARCH}.zip")" > tflint.zip \
+    || curl -L "$(curl -s ${TFLINT_RELEASES} | grep -o -E "https://.+?/v${TFLINT_VERSION}/tflint_${TARGETOS}_${TARGETARCH}.zip")" > tflint.zip \
     ) && unzip tflint.zip && rm tflint.zip \
     ; fi
 
@@ -132,9 +132,9 @@ RUN . /.env && \
 RUN . /.env && \
     if [ "$TFSEC_VERSION" != "false" ]; then \
     ( \
-        TFSEC_RELEASES="https://api.github.com/repos/aquasecurity/tfsec/releases" && \
-        [ "$TFSEC_VERSION" = "latest" ] && curl -L "$(curl -s ${TFSEC_RELEASES}/latest | grep -o -E -m 1 "https://.+?/tfsec-${TARGETOS}-${TARGETARCH}")" > tfsec \
-        || curl -L "$(curl -s ${TFSEC_RELEASES} | grep -o -E -m 1 "https://.+?v${TFSEC_VERSION}/tfsec-${TARGETOS}-${TARGETARCH}")" > tfsec \
+    TFSEC_RELEASES="https://api.github.com/repos/aquasecurity/tfsec/releases" && \
+    [ "$TFSEC_VERSION" = "latest" ] && curl -L "$(curl -s ${TFSEC_RELEASES}/latest | grep -o -E -m 1 "https://.+?/tfsec-${TARGETOS}-${TARGETARCH}")" > tfsec \
+    || curl -L "$(curl -s ${TFSEC_RELEASES} | grep -o -E -m 1 "https://.+?v${TFSEC_VERSION}/tfsec-${TARGETOS}-${TARGETARCH}")" > tfsec \
     ) && chmod +x tfsec \
     ; fi
 
@@ -143,9 +143,9 @@ RUN . /.env && \
     if [ "$TRIVY_VERSION" != "false" ]; then \
     if [ "$TARGETARCH" != "amd64" ]; then ARCH="$TARGETARCH"; else ARCH="64bit"; fi; \
     ( \
-        TRIVY_RELEASES="https://api.github.com/repos/aquasecurity/trivy/releases" && \
-        [ "$TRIVY_VERSION" = "latest" ] && curl -L "$(curl -s ${TRIVY_RELEASES}/latest | grep -o -E -i -m 1 "https://.+?/trivy_.+?_${TARGETOS}-${ARCH}.tar.gz")" > trivy.tar.gz \
-        || curl -L "$(curl -s ${TRIVY_RELEASES} | grep -o -E -i -m 1 "https://.+?/v${TRIVY_VERSION}/trivy_.+?_${TARGETOS}-${ARCH}.tar.gz")" > trivy.tar.gz \
+    TRIVY_RELEASES="https://api.github.com/repos/aquasecurity/trivy/releases" && \
+    [ "$TRIVY_VERSION" = "latest" ] && curl -L "$(curl -s ${TRIVY_RELEASES}/latest | grep -o -E -i -m 1 "https://.+?/trivy_.+?_${TARGETOS}-${ARCH}.tar.gz")" > trivy.tar.gz \
+    || curl -L "$(curl -s ${TRIVY_RELEASES} | grep -o -E -i -m 1 "https://.+?/v${TRIVY_VERSION}/trivy_.+?_${TARGETOS}-${ARCH}.tar.gz")" > trivy.tar.gz \
     ) && tar -xzf trivy.tar.gz trivy && rm trivy.tar.gz \
     ; fi
 
@@ -153,9 +153,9 @@ RUN . /.env && \
 RUN . /.env && \
     if [ "$TFUPDATE_VERSION" != "false" ]; then \
     ( \
-        TFUPDATE_RELEASES="https://api.github.com/repos/minamijoyo/tfupdate/releases" && \
-        [ "$TFUPDATE_VERSION" = "latest" ] && curl -L "$(curl -s ${TFUPDATE_RELEASES}/latest | grep -o -E -m 1 "https://.+?_${TARGETOS}_${TARGETARCH}.tar.gz")" > tfupdate.tgz \
-        || curl -L "$(curl -s ${TFUPDATE_RELEASES} | grep -o -E -m 1 "https://.+?${TFUPDATE_VERSION}_${TARGETOS}_${TARGETARCH}.tar.gz")" > tfupdate.tgz \
+    TFUPDATE_RELEASES="https://api.github.com/repos/minamijoyo/tfupdate/releases" && \
+    [ "$TFUPDATE_VERSION" = "latest" ] && curl -L "$(curl -s ${TFUPDATE_RELEASES}/latest | grep -o -E -m 1 "https://.+?_${TARGETOS}_${TARGETARCH}.tar.gz")" > tfupdate.tgz \
+    || curl -L "$(curl -s ${TFUPDATE_RELEASES} | grep -o -E -m 1 "https://.+?${TFUPDATE_VERSION}_${TARGETOS}_${TARGETARCH}.tar.gz")" > tfupdate.tgz \
     ) && tar -xzf tfupdate.tgz tfupdate && rm tfupdate.tgz \
     ; fi
 
@@ -163,9 +163,9 @@ RUN . /.env && \
 RUN . /.env && \
     if [ "$HCLEDIT_VERSION" != "false" ]; then \
     ( \
-        HCLEDIT_RELEASES="https://api.github.com/repos/minamijoyo/hcledit/releases" && \
-        [ "$HCLEDIT_VERSION" = "latest" ] && curl -L "$(curl -s ${HCLEDIT_RELEASES}/latest | grep -o -E -m 1 "https://.+?_${TARGETOS}_${TARGETARCH}.tar.gz")" > hcledit.tgz \
-        || curl -L "$(curl -s ${HCLEDIT_RELEASES} | grep -o -E -m 1 "https://.+?${HCLEDIT_VERSION}_${TARGETOS}_${TARGETARCH}.tar.gz")" > hcledit.tgz \
+    HCLEDIT_RELEASES="https://api.github.com/repos/minamijoyo/hcledit/releases" && \
+    [ "$HCLEDIT_VERSION" = "latest" ] && curl -L "$(curl -s ${HCLEDIT_RELEASES}/latest | grep -o -E -m 1 "https://.+?_${TARGETOS}_${TARGETARCH}.tar.gz")" > hcledit.tgz \
+    || curl -L "$(curl -s ${HCLEDIT_RELEASES} | grep -o -E -m 1 "https://.+?${HCLEDIT_VERSION}_${TARGETOS}_${TARGETARCH}.tar.gz")" > hcledit.tgz \
     ) && tar -xzf hcledit.tgz hcledit && rm hcledit.tgz \
     ; fi
 
@@ -210,7 +210,7 @@ COPY --from=builder \
     /bin_dir/ \
     /usr/bin/tofu \
     /usr/local/bin/checkov* \
-        /usr/bin/
+    /usr/bin/
 # Copy pre-commit packages
 COPY --from=builder /usr/local/lib/python3.12/site-packages/ /usr/local/lib/python3.12/site-packages/
 # Copy terrascan policies
@@ -218,10 +218,10 @@ COPY --from=builder /root/ /root/
 
 # Install hooks extra deps
 RUN if [ "$(grep -o '^terraform-docs SKIPPED$' /usr/bin/tools_versions_info)" = "" ]; then \
-        apk add --no-cache perl=~5 \
+    apk add --no-cache perl=~5 \
     ; fi && \
     if [ "$(grep -o '^infracost SKIPPED$' /usr/bin/tools_versions_info)" = "" ]; then \
-        apk add --no-cache jq=~1 \
+    apk add --no-cache jq=~1 \
     ; fi && \
     # Fix git runtime fatal:
     # unsafe repository ('/lint' is owned by someone else)
diff --git a/README.md b/README.md
index 73c4bb0..c8434c9 100644
--- a/README.md
+++ b/README.md
@@ -60,7 +60,7 @@ If you are using `pre-commit-opentofu` already or want to support its developmen
   </sup></sub></sup></sub></sup></sub></sup></sub></sup></sub></sup></sub></sup></sub></sup></sub></sup></sub><br><br>
 * [`checkov`](https://github.com/bridgecrewio/checkov) required for `tofu_checkov` hook.
 * [`terraform-docs`](https://github.com/terraform-docs/terraform-docs) required for `tofu_docs` hook.
-* [`terragrunt`](https://terragrunt.gruntwork.io/docs/getting-started/install/) required for `terragrunt_validate` hook.
+* [`terragrunt`](https://terragrunt.gruntwork.io/docs/getting-started/install/) required for `terragrunt_validate` and `terragrunt_validate_inputs` hooks.
 * [`terrascan`](https://github.com/tenable/terrascan) required for `terrascan` hook.
 * [`TFLint`](https://github.com/terraform-linters/tflint) required for `tofu_tflint` hook.
 * [`TFSec`](https://github.com/liamg/tfsec) required for `tofu_tfsec` hook.
@@ -266,9 +266,35 @@ TAG=latest
 docker run --rm --entrypoint cat tofuutils/pre-commit-opentofu:$TAG /usr/bin/tools_versions_info
 ```
 
+### Example: Terragrunt Input Validation
+
+Use `terragrunt_validate_inputs` to check that Terragrunt inputs line up with the module variables they are passed into:
+
+```yaml
+repos:
+- repo: https://github.com/tofuutils/pre-commit-opentofu
+  rev: <VERSION> # Get the latest from: https://github.com/tofuutils/pre-commit-opentofu/releases
+  hooks:
+    - id: terragrunt_fmt
+    - id: terragrunt_validate_inputs
+      args:
+        - --args=--terragrunt-strict-validate
+```
+
+> **Note**: This hook automatically uses `terragrunt validate-inputs` for older Terragrunt releases and `terragrunt hcl validate --inputs` for newer releases.
+>
+> If Terragrunt reports intermittent `.terragrunt-cache` download or `file exists` errors in your repository, run this hook serially in your consumer configuration:
+>
+> ```yaml
+>     - id: terragrunt_validate_inputs
+>       require_serial: true
+>       args:
+>         - --args=--terragrunt-strict-validate
+> ```
+
 ## Available Hooks
 
-There are several [pre-commit](https://pre-commit.com/) hooks to keep OpenTofu configurations (both `*.tf` and `*.tfvars`) and Terragrunt configurations (`*.hcl`) in a good shape:
+There are several [pre-commit](https://pre-commit.com/) hooks to keep OpenTofu configurations (`*.tf`, `*.tofu`, and `*.tfvars`) and Terragrunt configurations (`*.hcl`) in a good shape:
 
 <!-- markdownlint-disable no-inline-html -->
 | Hook name                                              | Description                                                                                                                                                                                                                                  | Dependencies<br><sup>[Install instructions here](#1-install-dependencies)</sup>      |
@@ -286,6 +312,7 @@ There are several [pre-commit](https://pre-commit.com/) hooks to keep OpenTofu c
 | `tofu_validate`                                   | Validates all Terraform configuration files. [Hook notes](#tofu_validate)                                                                                                                                                               | `jq`, only for `--retry-once-with-cleanup` flag                                      |
 | `terragrunt_fmt`                                       | Reformat all [Terragrunt](https://github.com/gruntwork-io/terragrunt) configuration files (`*.hcl`) to a canonical format.                                                                                                                   | `terragrunt`                                                                         |
 | `terragrunt_validate`                                  | Validates all [Terragrunt](https://github.com/gruntwork-io/terragrunt) configuration files (`*.hcl`)                                                                                                                                         | `terragrunt`                                                                         |
+| `terragrunt_validate_inputs`                           | Validates Terragrunt unused and undefined inputs.                                                                                                                                                                                               | `terragrunt`                                                                         |
 | `tofu_wrapper_module_for_each`                    | Generates OpenTofu wrappers with `for_each` in module. [Hook notes](#terraform_wrapper_module_for_each)                                                                                                                                     | `hcledit`                                                                            |
 | `terrascan`                                            | [terrascan](https://github.com/tenable/terrascan) Detect compliance and security violations. [Hook notes](#terrascan)                                                                                                                        | `terrascan`                                                                          |
 | `tfupdate`                                             | [tfupdate](https://github.com/minamijoyo/tfupdate) Update version constraints of OpenTofu core, providers, and modules. [Hook notes](#tfupdate)                                                                                             | `tfupdate`                                                                           |
@@ -299,6 +326,8 @@ Check the [source file](https://github.com/tofuutils/pre-commit-opentofu/blob/ma
 
 OpenTofu operates on a per-dir basis, while `pre-commit` framework only supports files and files that exist. This means if you only remove the TF-related file without any other changes in the same dir, checks will be skipped. Example and details [here](https://github.com/pre-commit/pre-commit/issues/3048).
 
+Hooks match `*.tofu` files where OpenTofu configuration files are supported, but some wrapped third-party tools may lag behind OpenTofu's native `*.tofu` parsing. If a hook runs `terraform-docs`, `tflint`, `tfsec`, `trivy`, `checkov`, `infracost`, or `tfupdate`, make sure the installed tool version supports the file extensions used in your repository.
+
 ### All hooks: Usage of environment variables in `--args`
 
 > All, except deprecated hooks: `checkov`, `tofu_docs_replace`
@@ -552,7 +581,7 @@ To replicate functionality in `tofu_docs` hook:
         - --args=--config=.terraform-docs.yml
     ```
 
-### terraftofu_fmtorm_fmt
+### tofu_fmt
 
 1. `tofu_fmt` supports custom arguments so you can pass [supported flags](https://www.terraform.io/docs/cli/commands/fmt.html#usage). Eg:
 
@@ -689,7 +718,7 @@ To replicate functionality in `tofu_docs` hook:
         - --args=--config=__GIT_WORKING_DIR__/.tflint.hcl
     ```
 
-3. By default, pre-commit-opentofu performs directory switching into the OpenTofu modules for you. If you want to delgate the directory changing to the binary - this will allow tflint to determine the full paths for error/warning messages, rather than just module relative paths. *Note: this requires `tflint>=0.44.0`.* For example:
+3. By default, pre-commit-opentofu performs directory switching into the OpenTofu modules for you. If you want to delegate the directory changing to the binary - this will allow tflint to determine the full paths for error/warning messages, rather than just module relative paths. *Note: this requires `tflint>=0.44.0`.* For example:
 
     ```yaml
     - id: tofu_tflint
@@ -903,7 +932,7 @@ To replicate functionality in `tofu_docs` hook:
             require_serial: true
             entry: .generate-providers.sh
             language: script
-            files: \.tf(vars)?$
+            files: \.(tf|tofu|tfvars)$
             pass_filenames: false
 
      - repo: https://github.com/pre-commit/pre-commit-hooks
diff --git a/hooks/_common.sh b/hooks/_common.sh
index 133e457..5808c19 100644
--- a/hooks/_common.sh
+++ b/hooks/_common.sh
@@ -112,7 +112,7 @@ function common::parse_and_export_env_vars {
     while true; do
       # Check if at least 1 env var exists in `$arg`
       # shellcheck disable=SC2016 # '${' should not be expanded
-      if [[ "$arg" =~ .*'${'[A-Z_][A-Z0-9_]+?'}'.* ]]; then
+      if [[ "$arg" =~ .*'${'[A-Z_][A-Z0-9_]*'}'.* ]]; then
         # Get `ENV_VAR` from `.*${ENV_VAR}.*`
         local env_var_name=${arg#*$\{}
         env_var_name=${env_var_name%%\}*}
@@ -123,7 +123,7 @@ function common::parse_and_export_env_vars {
         # `$arg` will be checked in `if` conditional, `$ARGS` will be used in the next functions.
         # shellcheck disable=SC2016 # '${' should not be expanded
         arg=${arg/'${'$env_var_name'}'/$env_var_value}
-        ARGS[$arg_idx]=$arg
+        ARGS[arg_idx]=$arg
         # shellcheck disable=SC2016 # '${' should not be expanded
         common::colorify "green" 'After ${'"$env_var_name"'} expansion: '"'$arg'\n"
         continue
diff --git a/hooks/infracost_breakdown.sh b/hooks/infracost_breakdown.sh
index 5515791..121f49b 100755
--- a/hooks/infracost_breakdown.sh
+++ b/hooks/infracost_breakdown.sh
@@ -70,19 +70,24 @@ function infracost_breakdown_ {
     # -h .totalHourlyCost > 0.1
     # --hook-config=.currency == "USD"
     first_char=${check:0:1}
-    last_char=${check: -1}
+    last_char=${check:$((${#check} - 1)):1}
     if [ "$first_char" == "$last_char" ] && {
       [ "$first_char" == '"' ] || [ "$first_char" == "'" ]
     }; then
-      check="${check:1:-1}"
+      check="${check:1:$((${#check} - 2))}"
     fi
 
-    mapfile -t operations < <(echo "$check" | grep -oE '[!<>=]{1,2}')
+    # Replace mapfile with while read loop for bash 3.2 compatibility
+    operations=()
+    while IFS= read -r line; do
+      operations+=("$line")
+    done < <(echo "$check" | grep -oE '[!<>=]{1,2}')
+
     # Get the very last operator, that is used in comparison inside `jq` query.
     # From the example below we need to pick the `>` which is in between `add` and `1000`,
     # but not the `!=`, which goes earlier in the `jq` expression
     # [.projects[].diff.totalMonthlyCost | select (.!=null) | tonumber] | add > 1000
-    operation=${operations[-1]}
+    operation=${operations[$((${#operations[@]} - 1))]}
 
     IFS="$operation" read -r -a jq_check <<< "$check"
     real_value="$(jq "${jq_check[0]}" <<< "$RESULTS")"
diff --git a/hooks/terragrunt_fmt.sh b/hooks/terragrunt_fmt.sh
index 7c78b92..0b4165a 100755
--- a/hooks/terragrunt_fmt.sh
+++ b/hooks/terragrunt_fmt.sh
@@ -12,7 +12,7 @@ function main {
   common::parse_cmdline "$@"
   common::export_provided_env_vars "${ENV_VARS[@]}"
   common::parse_and_export_env_vars
-  # JFYI: terragrunt hclfmt color already suppressed via PRE_COMMIT_COLOR=never
+  # JFYI: terragrunt hcl format color already suppressed via PRE_COMMIT_COLOR=never
 
   # shellcheck disable=SC2153 # False positive
   common::per_dir_hook "$HOOK_ID" "${#ARGS[@]}" "${ARGS[@]}" "${FILES[@]}"
@@ -40,7 +40,7 @@ function per_dir_hook_unique_part {
   local -a -r args=("$@")
 
   # pass the arguments to hook
-  terragrunt hclfmt "${args[@]}"
+  terragrunt hcl format "${args[@]}"
 
   # return exit code to common::per_dir_hook
   local exit_code=$?
@@ -57,7 +57,7 @@ function run_hook_on_whole_repo {
   local -a -r args=("$@")
 
   # pass the arguments to hook
-  terragrunt hclfmt "$(pwd)" "${args[@]}"
+  terragrunt hcl format "$(pwd)" "${args[@]}"
 
   # return exit code to common::per_dir_hook
   local exit_code=$?
diff --git a/hooks/terragrunt_validate_inputs.sh b/hooks/terragrunt_validate_inputs.sh
new file mode 100755
index 0000000..a406324
--- /dev/null
+++ b/hooks/terragrunt_validate_inputs.sh
@@ -0,0 +1,198 @@
+#!/usr/bin/env bash
+set -eo pipefail
+
+# globals variables
+# shellcheck disable=SC2155 # No way to assign to readonly variable in separate lines
+readonly SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd -P)"
+# shellcheck source=_common.sh
+. "$SCRIPT_DIR/_common.sh"
+
+function main {
+  common::initialize "$SCRIPT_DIR"
+  common::parse_cmdline "$@"
+  common::export_provided_env_vars "${ENV_VARS[@]}"
+  common::parse_and_export_env_vars
+  # JFYI: terragrunt validate color already suppressed via PRE_COMMIT_COLOR=never
+
+  if terragrunt_version_ge_0_78; then
+    normalize_validate_args_for_modern_terragrunt
+    readonly SUBCOMMAND=("hcl" "validate" "--inputs")
+    readonly RUN_ALL_SUBCOMMAND=("run" "--all" "hcl" "validate" "--inputs")
+
+    # shellcheck disable=SC2153 # False positive
+    common::per_dir_hook "$HOOK_ID" "${#ARGS[@]}" "${ARGS[@]}" "${FILES[@]}"
+    return
+  fi
+
+  run_legacy_validate_inputs
+}
+
+function normalize_validate_args_for_modern_terragrunt {
+  local arg_idx
+
+  for arg_idx in "${!ARGS[@]}"; do
+    case "${ARGS[$arg_idx]}" in
+      --terragrunt-strict-validate | --strict-validate)
+        ARGS[arg_idx]="--strict"
+        ;;
+    esac
+  done
+}
+
+function terragrunt_version_ge_0_78 {
+  local version_raw
+  local version
+  local major
+  local minor
+
+  version_raw=$(terragrunt --version 2> /dev/null || true)
+  version=$(echo "$version_raw" | sed -E 's/.*v?([0-9]+)\.([0-9]+)\.([0-9]+).*/\1.\2.\3/')
+
+  if [[ ! $version =~ ^[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
+    return 1
+  fi
+
+  IFS=. read -r major minor _ <<< "$version"
+
+  if ((major > 0)); then
+    return 0
+  fi
+
+  if ((minor >= 78)); then
+    return 0
+  fi
+
+  return 1
+}
+
+function run_legacy_validate_inputs {
+  local -a unit_dirs=()
+  local final_exit_code=0
+  local dir_path
+
+  while read -r dir_path; do
+    if [[ -n $dir_path ]]; then
+      unit_dirs+=("$dir_path")
+    fi
+  done < <(legacy_unit_dirs_from_files)
+
+  if [[ ${#unit_dirs[@]} -eq 0 ]]; then
+    return 0
+  fi
+
+  # preserve errexit status
+  shopt -qo errexit && ERREXIT_IS_SET=true
+  set +e
+
+  for dir_path in "${unit_dirs[@]}"; do
+    pushd "$dir_path" > /dev/null || continue
+    terragrunt validate-inputs "${ARGS[@]}"
+
+    local exit_code=$?
+    if [ $exit_code -ne 0 ]; then
+      final_exit_code=$exit_code
+    fi
+
+    popd > /dev/null
+  done
+
+  [[ $ERREXIT_IS_SET ]] && set -e
+  exit $final_exit_code
+}
+
+function legacy_unit_dirs_from_files {
+  local -a unit_files=()
+  local file_with_path
+  local file_dir
+  local file_name
+
+  if common::is_hook_run_on_whole_repo "$HOOK_ID" "${FILES[@]}"; then
+    find . -type f -name terragrunt.hcl \
+      -not -path '*/.terragrunt-cache/*' \
+      -not -path '*/.terraform/*' |
+      sort -u | while read -r unit_file; do
+      dirname "$unit_file"
+    done
+    return
+  fi
+
+  for file_with_path in "${FILES[@]}"; do
+    file_dir=$(dirname "$file_with_path")
+    file_name=$(basename "$file_with_path")
+
+    if [[ $file_name == terragrunt.hcl ]]; then
+      unit_files+=("$file_with_path")
+      continue
+    fi
+
+    while read -r unit_file; do
+      if [[ -n $unit_file ]]; then
+        unit_files+=("$unit_file")
+      fi
+    done < <(find "$file_dir" -type f -name terragrunt.hcl \
+      -not -path '*/.terragrunt-cache/*' \
+      -not -path '*/.terraform/*' | sort -u)
+  done
+
+  if [[ ${#unit_files[@]} -eq 0 ]]; then
+    find . -type f -name terragrunt.hcl \
+      -not -path '*/.terragrunt-cache/*' \
+      -not -path '*/.terraform/*' |
+      sort -u | while read -r unit_file; do
+      dirname "$unit_file"
+    done
+    return
+  fi
+
+  printf '%s\n' "${unit_files[@]}" | sort -u | while read -r unit_file; do
+    dirname "$unit_file"
+  done
+}
+
+#######################################################################
+# Unique part of `common::per_dir_hook`. The function is executed in loop
+# on each provided dir path. Run wrapped tool with specified arguments
+# Arguments:
+#   dir_path (string) PATH to dir relative to git repo root.
+#     Can be used in error logging
+#   change_dir_in_unique_part (string/false) Modifier which creates
+#     possibilities to use non-common chdir strategies.
+#     Availability depends on hook.
+#   args (array) arguments that configure wrapped tool behavior
+# Outputs:
+#   If failed - print out hook checks status
+#######################################################################
+function per_dir_hook_unique_part {
+  # shellcheck disable=SC2034 # Unused var.
+  local -r dir_path="$1"
+  # shellcheck disable=SC2034 # Unused var.
+  local -r change_dir_in_unique_part="$2"
+  shift 2
+  local -a -r args=("$@")
+
+  # pass the arguments to hook
+  terragrunt "${SUBCOMMAND[@]}" "${args[@]}"
+
+  # return exit code to common::per_dir_hook
+  local exit_code=$?
+  return $exit_code
+}
+
+#######################################################################
+# Unique part of `common::per_dir_hook`. The function is executed one time
+# in the root git repo
+# Arguments:
+#   args (array) arguments that configure wrapped tool behavior
+#######################################################################
+function run_hook_on_whole_repo {
+  local -a -r args=("$@")
+
+  # pass the arguments to hook
+  terragrunt "${RUN_ALL_SUBCOMMAND[@]}" "${args[@]}"
+
+  # return exit code to common::per_dir_hook
+  local exit_code=$?
+  return $exit_code
+}
+
+[ "${BASH_SOURCE[0]}" != "$0" ] || main "$@"
diff --git a/hooks/tofu_docs.sh b/hooks/tofu_docs.sh
index b7c9e30..8b8d136 100755
--- a/hooks/tofu_docs.sh
+++ b/hooks/tofu_docs.sh
@@ -155,7 +155,7 @@ function tofu_docs {
     #
     if $create_if_not_exist && [[ ! -f "$text_file" ]]; then
       dir_have_tf_files="$(
-        find . -maxdepth 1 -type f | sed 's|.*\.||' | sort -u | grep -oE '^tf$|^tfvars$' ||
+        find . -maxdepth 1 -type f | sed 's|.*\.||' | sort -u | grep -oE '^tofu|^tf$|^tfvars$' ||
           exit 0
       )"
 
diff --git a/hooks/tofu_docs_replace.py b/hooks/tofu_docs_replace.py
index a9cf6c9..26f1d06 100644
--- a/hooks/tofu_docs_replace.py
+++ b/hooks/tofu_docs_replace.py
@@ -7,30 +7,41 @@ import sys
 def main(argv=None):
     parser = argparse.ArgumentParser(
         description="""Run terraform-docs on a set of files. Follows the standard convention of
-                       pulling the documentation from main.tf in order to replace the entire
+                       pulling the documentation from main.(tf|tofu) in order to replace the entire
                        README.md file each time."""
     )
     parser.add_argument(
-        '--dest', dest='dest', default='README.md',
+        "--dest",
+        dest="dest",
+        default="README.md",
     )
     parser.add_argument(
-        '--sort-inputs-by-required', dest='sort', action='store_true',
-        help='[deprecated] use --sort-by-required instead',
+        "--sort-inputs-by-required",
+        dest="sort",
+        action="store_true",
+        help="[deprecated] use --sort-by-required instead",
     )
     parser.add_argument(
-        '--sort-by-required', dest='sort', action='store_true',
+        "--sort-by-required",
+        dest="sort",
+        action="store_true",
     )
     parser.add_argument(
-        '--with-aggregate-type-defaults', dest='aggregate', action='store_true',
-        help='[deprecated]',
+        "--with-aggregate-type-defaults",
+        dest="aggregate",
+        action="store_true",
+        help="[deprecated]",
     )
-    parser.add_argument('filenames', nargs='*', help='Filenames to check.')
+    parser.add_argument("filenames", nargs="*", help="Filenames to check.")
     args = parser.parse_args(argv)
 
     dirs = []
     for filename in args.filenames:
-        if (os.path.realpath(filename) not in dirs and
-                (filename.endswith(".tf") or filename.endswith(".tfvars"))):
+        if os.path.realpath(filename) not in dirs and (
+            filename.endswith(".tf")
+            or filename.endswith(".tofu")
+            or filename.endswith(".tfvars")
+        ):
             dirs.append(os.path.dirname(filename))
 
     retval = 0
@@ -38,12 +49,12 @@ def main(argv=None):
     for dir in dirs:
         try:
             procArgs = []
-            procArgs.append('terraform-docs')
+            procArgs.append("terraform-docs")
             if args.sort:
-                procArgs.append('--sort-by-required')
-            procArgs.append('md')
+                procArgs.append("--sort-by-required")
+            procArgs.append("md")
             procArgs.append("./{dir}".format(dir=dir))
-            procArgs.append('>')
+            procArgs.append(">")
             procArgs.append("./{dir}/{dest}".format(dir=dir, dest=args.dest))
             subprocess.check_call(" ".join(procArgs), shell=True)
         except subprocess.CalledProcessError as e:
@@ -52,5 +63,5 @@ def main(argv=None):
     return retval
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     sys.exit(main())
diff --git a/hooks/tofu_wrapper_module_for_each.sh b/hooks/tofu_wrapper_module_for_each.sh
index f1a70ef..4572b58 100755
--- a/hooks/tofu_wrapper_module_for_each.sh
+++ b/hooks/tofu_wrapper_module_for_each.sh
@@ -312,10 +312,10 @@ EOF
 
     # Read content of all OpenTofu files
     # shellcheck disable=SC2207
-    all_tf_content=$(find "${full_module_dir}" -name '*.tf' -maxdepth 1 -type f -exec cat {} +)
+    all_tf_content=$(find "${full_module_dir}" -regex '.*\.(tf|tofu)' -maxdepth 1 -type f -exec cat {} +)
 
     if [[ ! $all_tf_content ]]; then
-      common::colorify "yellow" "Skipping ${full_module_dir} because there are no *.tf files."
+      common::colorify "yellow" "Skipping ${full_module_dir} because there are no .tf or .tofu files."
       continue
     fi
 
diff --git a/lib_getopt b/lib_getopt
index c4b21fa..74e72f1 100644
--- a/lib_getopt
+++ b/lib_getopt
@@ -360,7 +360,7 @@ getopt() {
   }
 
   _getopt_resolve_abbrev() {
-    # Resolves an abbrevation from a list of possibilities.
+    # Resolves an abbreviation from a list of possibilities.
     # If the abbreviation is unambiguous, echoes the expansion on stdout
     # and returns 0.  If the abbreviation is ambiguous, prints a message on
     # stderr and returns 1. (For first parse this should convert to exit