diff --git a/.github/workflows/R-CMD-check.yaml b/.github/workflows/R-CMD-check.yaml
index 6de7639..bfd708d 100644
--- a/.github/workflows/R-CMD-check.yaml
+++ b/.github/workflows/R-CMD-check.yaml
@@ -1,57 +1,15 @@
-# Workflow derived from https://github.com/r-lib/actions/tree/v2/examples
+# Calls the shared CTTIR workflow. Do not add steps here - change the
+# shared one at CTTIR/.github so every package moves together.
 on:
   push:
     branches: [main, master]
   pull_request:
-  workflow_dispatch:
+    branches: [main, master]
 
-name: R-CMD-check.yaml
+name: R-CMD-check
 
 permissions: read-all
 
 jobs:
   R-CMD-check:
-    runs-on: ${{ matrix.config.os }}
-
-    name: ${{ matrix.config.os }} (${{ matrix.config.r }})
-
-    strategy:
-      fail-fast: false
-      matrix:
-        config:
-          - {os: macos-latest,   r: 'release'}
-          - {os: windows-latest, r: 'release'}
-          - {os: ubuntu-latest,  r: 'devel', http-user-agent: 'release'}
-          - {os: ubuntu-latest,  r: 'release'}
-          - {os: ubuntu-latest,  r: 'oldrel-1'}
-
-    env:
-      GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
-      R_KEEP_PKG_SOURCE: yes
-
-    steps:
-      - uses: actions/checkout@v4
-
-      - uses: r-lib/actions/setup-pandoc@v2
-
-      - uses: r-lib/actions/setup-r@v2
-        with:
-          r-version: ${{ matrix.config.r }}
-          http-user-agent: ${{ matrix.config.http-user-agent }}
-          use-public-rspm: true
-
-      - name: Install system dependencies (Linux)
-        if: runner.os == 'Linux'
-        run: |
-          sudo apt-get update
-          sudo apt-get install -y libgdal-dev libgeos-dev libproj-dev libudunits2-dev
-
-      - uses: r-lib/actions/setup-r-dependencies@v2
-        with:
-          extra-packages: any::rcmdcheck
-          needs: check
-
-      - uses: r-lib/actions/check-r-package@v2
-        with:
-          upload-snapshots: true
-          build_args: 'c("--no-manual","--compact-vignettes=gs+qpdf")'
+    uses: CTTIR/.github/.github/workflows/R-CMD-check.yaml@main
diff --git a/.github/workflows/lint.yaml b/.github/workflows/lint.yaml
new file mode 100644
index 0000000..c1ccbce
--- /dev/null
+++ b/.github/workflows/lint.yaml
@@ -0,0 +1,16 @@
+on:
+  push:
+    branches: [main, master]
+  pull_request:
+    branches: [main, master]
+
+name: lint
+
+permissions: read-all
+
+jobs:
+  lint:
+    uses: CTTIR/.github/.github/workflows/lint.yaml@main
+    with:
+      # Report-only until this package house-linter count reaches zero.
+      blocking: false
diff --git a/.github/workflows/test-coverage.yaml b/.github/workflows/test-coverage.yaml
index 9842747..bb19507 100644
--- a/.github/workflows/test-coverage.yaml
+++ b/.github/workflows/test-coverage.yaml
@@ -1,68 +1,19 @@
-# Workflow derived from https://github.com/r-lib/actions/tree/v2/examples
 on:
   push:
     branches: [main, master]
   pull_request:
-  workflow_dispatch:
+    branches: [main, master]
 
-name: test-coverage.yaml
+name: test-coverage
 
 permissions: read-all
 
 jobs:
   test-coverage:
-    runs-on: ubuntu-latest
-    env:
-      GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
-
-    steps:
-      - uses: actions/checkout@v4
-
-      - uses: r-lib/actions/setup-r@v2
-        with:
-          use-public-rspm: true
-
-      - name: Install system dependencies (Linux)
-        run: |
-          sudo apt-get update
-          sudo apt-get install -y libgdal-dev libgeos-dev libproj-dev libudunits2-dev
-
-      - uses: r-lib/actions/setup-r-dependencies@v2
-        with:
-          extra-packages: any::covr, any::xml2
-          needs: coverage
-
-      - name: Test coverage
-        run: |
-          cov <- covr::package_coverage(
-            quiet = FALSE,
-            clean = FALSE,
-            install_path = file.path(normalizePath(Sys.getenv("RUNNER_TEMP"), winslash = "/"), "package")
-          )
-          covr::to_cobertura(cov)
-        shell: Rscript {0}
-
-      - uses: codecov/codecov-action@v4
-        with:
-          # Upload is best-effort: without a CODECOV_TOKEN secret the upload to a
-          # protected branch is rejected, and coverage reporting should not fail
-          # the job. Set the CODECOV_TOKEN repository secret to enable uploads.
-          fail_ci_if_error: false
-          file: ./cobertura.xml
-          plugins: noop
-          disable_search: true
-          token: ${{ secrets.CODECOV_TOKEN }}
-
-      - name: Show testthat output
-        if: always()
-        run: |
-          ## --------------------------------------------------------------------
-          find '${{ runner.temp }}/package' -name 'testthat.Rout*' -exec cat '{}' \; || true
-        shell: bash
-
-      - name: Upload test results
-        if: failure()
-        uses: actions/upload-artifact@v4
-        with:
-          name: coverage-test-failures
-          path: ${{ runner.temp }}/package
+    uses: CTTIR/.github/.github/workflows/test-coverage.yaml@main
+    with:
+      # Report-only for now. The shared workflow computes coverage with covr
+      # and an explicit exit rather than delegating the gate to Codecov;
+      # set a real floor once this package is re-baselined.
+      floor: 0
+    secrets: inherit