From 6788f4e9746bb7509ba07bac1a1a579462a3b0be Mon Sep 17 00:00:00 2001
From: ChrisRackauckas-Claude <accounts@chrisrackauckas.com>
Date: Mon, 8 Jun 2026 07:25:28 -0400
Subject: [PATCH] Simplify root CI to grouped-tests.yml (matrix from
 test/test_groups.toml)

Replace the hand-maintained group x version matrix in the root CI.yml test
job with the thin grouped-tests.yml@v1 caller. The (group, version) matrix is
now read from test/test_groups.toml, which already declares the root groups
(Core on [lts,1,pre]; nopre on [lts,1]) and reproduces the previous matrix
exactly (5/5). coverage-directories: "src" is preserved as the only non-default
input. The root reads its group from the default GROUP env var, so no
group-env-name input is needed. SublibraryCI.yml (lib/* coverage) is untouched.

Co-Authored-By: Chris Rackauckas <accounts@chrisrackauckas.com>
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
---
 .github/workflows/CI.yml | 27 ++++++---------------------
 1 file changed, 6 insertions(+), 21 deletions(-)

diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 02743ea9..7900274e 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -14,27 +14,12 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: ${{ github.ref_name != github.event.repository.default_branch || github.ref != 'refs/tags/v*' }}
 jobs:
-  test:
-    name: "Tests"
-    strategy:
-      fail-fast: false
-      matrix:
-        # Root-only test groups. The lib/* sublibraries (DataDrivenDMD, DataDrivenSR,
-        # DataDrivenSparse, DataDrivenLux) are covered by SublibraryCI.yml via the
-        # project model and must not be double-tested through the root matrix.
-        group:
-          - Core
-          - nopre
-        version:
-          - '1'
-          - 'lts'
-          - 'pre'
-        exclude:
-          - group: nopre
-            version: 'pre'
-    uses: "SciML/.github/.github/workflows/tests.yml@v1"
+  tests:
+    # Root-only test groups (Core, nopre) are declared in test/test_groups.toml.
+    # The lib/* sublibraries (DataDrivenDMD, DataDrivenSR, DataDrivenSparse,
+    # DataDrivenLux) are covered by SublibraryCI.yml via the project model and
+    # must not be double-tested through this root matrix.
+    uses: "SciML/.github/.github/workflows/grouped-tests.yml@v1"
     with:
-      julia-version: "${{ matrix.version }}"
-      group: "${{ matrix.group }}"
       coverage-directories: "src"
     secrets: "inherit"