diff --git a/.github/workflows/check-external-types.yml b/.github/workflows/check-external-types.yml
index 33c48a2..30f4864 100644
--- a/.github/workflows/check-external-types.yml
+++ b/.github/workflows/check-external-types.yml
@@ -44,23 +44,12 @@ jobs:
     timeout-minutes: 60
     steps:
       - uses: taiki-e/checkout-action@v1
-      - id: pre
-        run: |
-          IFS=$'\n\t'
-          trap -- 's=$?; printf >&2 "%s\n" "${0##*/}:${LINENO}: \`${BASH_COMMAND}\` exit with ${s}"; exit ${s}' ERR
-          metadata=$(cargo metadata --format-version=1 --no-deps)
-          # Publishing is unrestricted if null, and forbidden if an empty array.
-          if [[ -n "$(jq -c '. as $metadata | .workspace_members[] as $id | $metadata.packages[] | select(.id == $id and .publish != [] and .targets[].kind[] == "lib")' <<<"${metadata}")" ]]; then
-            printf 'has-lib=true\n' >>"${GITHUB_OUTPUT}"
-          fi
       - uses: taiki-e/github-actions/install-rust@main
         with:
           toolchain: ${{ inputs.rust }}
-        if: steps.pre.outputs.has-lib == 'true'
       - uses: taiki-e/cache-cargo-install-action@v2
         with:
           tool: cargo-check-external-types@0.1.13
-        if: steps.pre.outputs.has-lib == 'true'
       # Refs:
       # - https://github.com/rust-lang/docs.rs/blob/HEAD/crates/metadata/lib.rs
       # - https://github.com/rust-lang/docs.rs/blob/HEAD/src/docbuilder/rustwide_builder.rs
@@ -153,4 +142,3 @@ jobs:
               )
             fi
           done
-        if: steps.pre.outputs.has-lib == 'true'
diff --git a/.github/workflows/tidy.yml b/.github/workflows/tidy.yml
index 1f98356..22ea247 100644
--- a/.github/workflows/tidy.yml
+++ b/.github/workflows/tidy.yml
@@ -8,24 +8,37 @@ on:
         required: false
         type: string
         default: nightly
-      target:
+      clippy:
+        required: false
+        type: boolean
+        default: true
+      clippy-target:
         required: false
         type: string
-      args:
+      clippy-args:
         required: false
         type: string
-      clippy:
+      check-external-types:
         required: false
         type: boolean
         default: true
-      fuzzy_provenance_casts:
+      deny:
         required: false
         type: boolean
         default: true
-      unqualified_local_imports:
+      deny-args:
+        required: false
+        type: string
+      docs:
         required: false
         type: boolean
         default: true
+      docs-target:
+        required: false
+        type: string
+      docs-args:
+        required: false
+        type: string
 
 env:
   CARGO_INCREMENTAL: 0
@@ -51,7 +64,31 @@ defaults:
     shell: bash --noprofile --norc -CeEuo pipefail {0}
 
 jobs:
+  prepare:
+    runs-on: ubuntu-latest
+    timeout-minutes: 60
+    steps:
+      - uses: taiki-e/checkout-action@v1
+      - id: parse
+        run: |
+          if [[ -n "$(git ls-files '*.rs')" ]]; then
+            printf 'rust=true\n' >>"${GITHUB_OUTPUT}"
+            metadata=$(cargo metadata --format-version=1 --no-deps)
+            # Publishing is unrestricted if null, and forbidden if an empty array.
+            if [[ -n "$(jq -c '. as $metadata | .workspace_members[] as $id | $metadata.packages[] | select(.id == $id and .publish != [])' <<<"${metadata}")" ]]; then
+              printf 'rust-pub=true\n' >>"${GITHUB_OUTPUT}"
+              if [[ -n "$(jq -c '. as $metadata | .workspace_members[] as $id | $metadata.packages[] | select(.id == $id and .publish != [] and .targets[].kind[] == "lib")' <<<"${metadata}")" ]]; then
+                printf 'rust-pub-lib=true\n' >>"${GITHUB_OUTPUT}"
+              fi
+            fi
+          fi
+    outputs:
+      rust: ${{ steps.parse.outputs.rust }}
+      rust-pub: ${{ steps.parse.outputs.rust-pub }}
+      rust-pub-lib: ${{ steps.parse.outputs.rust-pub-lib }}
+
   tidy:
+    needs: prepare
     runs-on: ubuntu-latest
     timeout-minutes: 60
     permissions:
@@ -60,22 +97,57 @@ jobs:
       repository-projects: read # for gh pr edit --add-assignee
     steps:
       - uses: taiki-e/checkout-action@v1
-      - id: pre
-        run: |
-          if [[ -n "$(git ls-files '*.rs')" ]]; then
-            printf 'rust=true\n' >>"${GITHUB_OUTPUT}"
-          fi
       - uses: taiki-e/github-actions/install-rust@main
         with:
           toolchain: ${{ inputs.rust }}
           component: rustfmt
-        if: steps.pre.outputs.rust == 'true'
+        if: needs.prepare.outputs.rust == 'true'
       - uses: taiki-e/install-action@shellcheck
       - uses: taiki-e/install-action@shfmt
-      - run: printf '%s\n' "STRICT_PROVENANCE_LINTS= -Z crate-attr=feature(strict_provenance_lints) -D fuzzy_provenance_casts" >>"${GITHUB_ENV}"
-        if: always() && steps.pre.outputs.rust == 'true' && inputs.fuzzy_provenance_casts
-      - run: printf '%s\n' "RUSTFLAGS=${RUSTFLAGS} -Z crate-attr=feature(unqualified_local_imports) -D unqualified_local_imports" >>"${GITHUB_ENV}"
-        if: always() && steps.pre.outputs.rust == 'true' && inputs.unqualified_local_imports
+      - run: cat -- tools/.tidy-check-license-headers
+      - run: cat -- .cspell.json
+      - run: printf 'REMOVE_UNUSED_WORDS=1\n' >>"${GITHUB_ENV}"
+        if: github.repository_owner == 'taiki-e' && (github.event_name == 'schedule' || github.event_name == 'push' && github.ref == 'refs/heads/main')
+      - run: tools/tidy.sh
+      - id: diff
+        run: |
+          git config user.name 'Taiki Endo'
+          git config user.email 'te316e89@gmail.com'
+          git add -N .github/.cspell
+          if ! git diff --exit-code -- .github/.cspell; then
+            git add .github/.cspell
+            git commit -m "Update cspell dictionary"
+            printf 'success=false\n' >>"${GITHUB_OUTPUT}"
+          fi
+        if: github.repository_owner == 'taiki-e' && (github.event_name == 'schedule' || github.event_name == 'push' && github.ref == 'refs/heads/main')
+      - id: create-pull-request
+        uses: peter-evans/create-pull-request@v7
+        with:
+          title: Update cspell dictionary
+          body: |
+            Auto-generated by CI using [create-pull-request](https://github.com/peter-evans/create-pull-request).
+          branch: update-cspell-dictionary
+          token: ${{ secrets.CREATE_PR_TOKEN }}
+        if: github.repository_owner == 'taiki-e' && (github.event_name == 'schedule' || github.event_name == 'push' && github.ref == 'refs/heads/main') && steps.diff.outputs.success == 'false'
+      - name: Notify PR author by assigning PR
+        run: gh pr edit --add-assignee taiki-e "${PR_NUMBER:?}"
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          PR_NUMBER: ${{ steps.create-pull-request.outputs.pull-request-number }}
+        if: github.repository_owner == 'taiki-e' && (github.event_name == 'schedule' || github.event_name == 'push' && github.ref == 'refs/heads/main') && steps.diff.outputs.success == 'false'
+      - run: git add -N . && git diff --exit-code
+
+  clippy:
+    needs: prepare
+    if: needs.prepare.outputs.rust == 'true' && inputs.clippy
+    runs-on: ubuntu-latest
+    timeout-minutes: 60
+    steps:
+      - uses: taiki-e/checkout-action@v1
+      - uses: taiki-e/github-actions/install-rust@main
+        with:
+          toolchain: ${{ inputs.rust }}
+          component: clippy
       - name: Run cargo clippy
         run: |
           trap -- 's=$?; printf >&2 "%s\n" "${0##*/}:${LINENO}: \`${BASH_COMMAND}\` exit with ${s}"; exit ${s}' ERR
@@ -90,14 +162,14 @@ jobs:
             "$@"
           }
           # shellcheck disable=SC2206
-          args=(${{ inputs.args }})
-          if [[ "${{ inputs.args }}" != *"-features"* ]]; then
+          args=(${{ inputs.clippy-args }})
+          if [[ "${{ inputs.clippy-args }}" != *"-features"* ]]; then
             args+=(--all-features)
           fi
           IFS=$'\n\t'
           # metadata=$(cargo metadata --format-version=1 --no-deps)
           # Handle target inputs.
-          input_target="${{ inputs.target }}"
+          input_target="${{ inputs.clippy-target }}"
           targets=()
           tier3_targets=()
           if [[ -n "${input_target}" ]]; then
@@ -110,24 +182,27 @@ jobs:
               fi
             done <<<"${input_target},"
           fi
-          if [[ -n "${RUSTFLAGS:-}" ]]; then
-              printf '%s\n' "+ RUSTFLAGS='${RUSTFLAGS}${STRICT_PROVENANCE_LINTS:-}' \\"
-          fi
           if [[ -n "${RUSTDOCFLAGS:-}" ]]; then
               printf '%s\n' "+ RUSTDOCFLAGS='${RUSTDOCFLAGS}' \\"
           fi
+          export RUSTFLAGS="${RUSTFLAGS} -Z crate-attr=feature(unqualified_local_imports) -D unqualified_local_imports"
           if [[ -z "${input_target}" ]] || [[ ${#targets[@]} -gt 0 ]]; then
-            retry rustup component add clippy
             (
               # core/alloc/std sets feature(strict_provenance_lints), so we cannot use
               # -Z crate-attr=feature(strict_provenance_lints) when -Z build-std is needed.
-              export RUSTFLAGS="${RUSTFLAGS}${STRICT_PROVENANCE_LINTS:-}"
+              # shellcheck disable=SC2030
+              export RUSTFLAGS="${RUSTFLAGS} -Z crate-attr=feature(strict_provenance_lints) -D fuzzy_provenance_casts"
+              printf '%s\n' "+ RUSTFLAGS='${RUSTFLAGS}' \\"
               set -x
               cargo clippy --workspace --all-targets "${targets[@]}" "${args[@]}"
             )
           fi
+          # shellcheck disable=SC2031
+          if [[ -n "${RUSTFLAGS:-}" ]]; then
+              printf '%s\n' "+ RUSTFLAGS='${RUSTFLAGS}' \\"
+          fi
           if [[ ${#tier3_targets[@]} -gt 0 ]]; then
-            retry rustup component add clippy rust-src
+            retry rustup component add rust-src
             for target in "${tier3_targets[@]}"; do
               (
                 set -x
@@ -147,39 +222,27 @@ jobs:
           #     cargo test --manifest-path="${manifest_path}" --doc "${args[@]}"
           #   )
           # done
-        if: always() && steps.pre.outputs.rust == 'true' && inputs.clippy
-      - run: cat -- tools/.tidy-check-license-headers
-        if: always()
-      - run: cat -- .cspell.json
-        if: always()
-      - run: printf 'REMOVE_UNUSED_WORDS=1\n' >>"${GITHUB_ENV}"
-        if: github.repository_owner == 'taiki-e' && (github.event_name == 'schedule' || github.event_name == 'push' && github.ref == 'refs/heads/main')
-      - run: tools/tidy.sh
-        if: always()
-      - id: diff
-        run: |
-          git config user.name 'Taiki Endo'
-          git config user.email 'te316e89@gmail.com'
-          git add -N .github/.cspell
-          if ! git diff --exit-code -- .github/.cspell; then
-            git add .github/.cspell
-            git commit -m "Update cspell dictionary"
-            printf 'success=false\n' >>"${GITHUB_OUTPUT}"
-          fi
-        if: github.repository_owner == 'taiki-e' && (github.event_name == 'schedule' || github.event_name == 'push' && github.ref == 'refs/heads/main')
-      - id: create-pull-request
-        uses: peter-evans/create-pull-request@v7
-        with:
-          title: Update cspell dictionary
-          body: |
-            Auto-generated by CI using [create-pull-request](https://github.com/peter-evans/create-pull-request).
-          branch: update-cspell-dictionary
-          token: ${{ secrets.CREATE_PR_TOKEN }}
-        if: github.repository_owner == 'taiki-e' && (github.event_name == 'schedule' || github.event_name == 'push' && github.ref == 'refs/heads/main') && steps.diff.outputs.success == 'false'
-      - name: Notify PR author by assigning PR
-        run: gh pr edit --add-assignee taiki-e "${PR_NUMBER:?}"
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-          PR_NUMBER: ${{ steps.create-pull-request.outputs.pull-request-number }}
-        if: github.repository_owner == 'taiki-e' && (github.event_name == 'schedule' || github.event_name == 'push' && github.ref == 'refs/heads/main') && steps.diff.outputs.success == 'false'
-      - run: git add -N . && git diff --exit-code
+
+  check-external-types:
+    needs: prepare
+    if: needs.prepare.outputs.rust-pub-lib == 'true' && inputs.check-external-types
+    uses: ./.github/workflows/check-external-types.yml
+    # with:
+    #   rust: ${{ inputs.check-external-types-toolchain }}
+    #   target: ${{ inputs.check-external-types-target }}
+    #   args: ${{ inputs.check-external-types-args }}
+  deny:
+    needs: prepare
+    if: needs.prepare.outputs.rust-pub == 'true' && inputs.deny
+    uses: ./.github/workflows/deny.yml
+    with:
+      rust: ${{ inputs.rust }}
+      args: ${{ inputs.deny-args }}
+  docs:
+    needs: prepare
+    if: needs.prepare.outputs.rust-pub-lib == 'true' && inputs.docs
+    uses: ./.github/workflows/docs.yml
+    with:
+      rust: ${{ inputs.rust }}
+      target: ${{ inputs.docs-target }}
+      args: ${{ inputs.docs-args }}