diff --git a/.github/workflows/R-CMD-check.yaml b/.github/workflows/R-CMD-check.yaml
index 6ea2e57..bfd708d 100644
--- a/.github/workflows/R-CMD-check.yaml
+++ b/.github/workflows/R-CMD-check.yaml
@@ -1,3 +1,5 @@
+# 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]
@@ -10,73 +12,4 @@ 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'}
-          # oldrel-3 covers the R version DESCRIPTION actually claims to
-          # support. Without it, code using base-R features newer than the
-          # declared minimum (e.g. `%||%`, added in R 4.4.0) is never built
-          # on a version where it fails.
-          - {os: ubuntu-latest,  r: 'oldrel-3'}
-
-    env:
-      GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
-      R_KEEP_PKG_SOURCE: yes
-      _R_CHECK_FORCE_SUGGESTS_: false
-
-    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: ${{ matrix.config.http-user-agent }}
-          use-public-rspm: true
-          extra-repositories: https://cttir.r-universe.dev
-
-      - uses: r-lib/actions/setup-r-dependencies@v2
-        with:
-          extra-packages: any::rcmdcheck
-          needs: check
-
-      - name: Install Bioconductor Suggests (optional)
-        run: |
-          if (!requireNamespace("BiocManager", quietly = TRUE))
-            install.packages("BiocManager")
-          bioc_pkgs <- c("DESeq2", "edgeR", "limma", "ShortRead", "Biostrings",
-                         "Rsamtools", "GenomicAlignments", "GenomicFeatures",
-                         "GenomicRanges", "SummarizedExperiment", "Biobase",
-                         "ComplexHeatmap", "EBImage", "SpatialExperiment",
-                         "S4Vectors", "SingleCellExperiment")
-          desc_suggests <- strsplit(read.dcf("DESCRIPTION")[, "Suggests"], ",\\s*")[[1]]
-          desc_suggests <- trimws(gsub("\\s*\\(.*\\)", "", desc_suggests))
-          to_install <- intersect(bioc_pkgs, desc_suggests)
-          if (length(to_install) > 0) {
-            message("Installing Bioconductor packages: ", paste(to_install, collapse = ", "))
-            tryCatch(
-              BiocManager::install(to_install, update = FALSE),
-              error = function(e) message("Bioconductor install skipped: ", e$message)
-            )
-          } else {
-            message("No Bioconductor Suggests found - skipping.")
-          }
-        shell: Rscript {0}
-        continue-on-error: true
-
-      - uses: r-lib/actions/check-r-package@v2
-        with:
-          upload-snapshots: true
-          args: 'c("--no-manual", "--as-cran")'
-          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 a04bbdd..bb19507 100644
--- a/.github/workflows/test-coverage.yaml
+++ b/.github/workflows/test-coverage.yaml
@@ -1,60 +1,19 @@
-# Workflow derived from https://github.com/r-lib/actions/tree/v2/examples
-# Need help debugging build failures? Start at https://github.com/r-lib/actions#where-to-find-help
 on:
   push:
     branches: [main, master]
   pull_request:
+    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
-
-      - 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:
-          fail_ci_if_error: false
-          file: ./cobertura.xml
-          plugin: 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