From f0fd59e282f62b343dba7ae0ffe8b8c20612c254 Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Tue, 29 Jul 2025 14:08:54 -0400
Subject: [PATCH 1/2] Add downgrade CI for all sublibraries
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

This adds a comprehensive downgrade CI workflow that tests compatibility
for the main package and all 10 sublibraries in the lib/ directory:

Main package: .
Sublibraries: BracketingNonlinearSolve, NonlinearSolveBase, NonlinearSolveFirstOrder, NonlinearSolveHomotopyContinuation, NonlinearSolveQuasiNewton, NonlinearSolveSciPy, NonlinearSolveSpectralMethods, SCCNonlinearSolve, SciMLJacobianOperators, SimpleNonlinearSolve

Each sublibrary is tested individually with downgraded dependencies
to ensure compatibility across the ecosystem.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>
---
 .github/workflows/DowngradeSublibraries.yml | 48 +++++++++++++++++++++
 1 file changed, 48 insertions(+)
 create mode 100644 .github/workflows/DowngradeSublibraries.yml

diff --git a/.github/workflows/DowngradeSublibraries.yml b/.github/workflows/DowngradeSublibraries.yml
new file mode 100644
index 000000000..8bac6cdab
--- /dev/null
+++ b/.github/workflows/DowngradeSublibraries.yml
@@ -0,0 +1,48 @@
+name: Downgrade Sublibraries
+on:
+  pull_request:
+    branches:
+      - master
+    paths-ignore:
+      - 'docs/**'
+  push:
+    branches:
+      - master
+    paths-ignore:
+      - 'docs/**'
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        downgrade_mode: ['alldeps']
+        julia-version: ['1.10']
+        project:
+          - '.'
+          - 'lib/BracketingNonlinearSolve'
+          - 'lib/NonlinearSolveBase'
+          - 'lib/NonlinearSolveFirstOrder'
+          - 'lib/NonlinearSolveHomotopyContinuation'
+          - 'lib/NonlinearSolveQuasiNewton'
+          - 'lib/NonlinearSolveSciPy'
+          - 'lib/NonlinearSolveSpectralMethods'
+          - 'lib/SCCNonlinearSolve'
+          - 'lib/SciMLJacobianOperators'
+          - 'lib/SimpleNonlinearSolve'
+    steps:
+      - uses: actions/checkout@v4
+      - uses: julia-actions/setup-julia@v2
+        with:
+          version: ${{ matrix.julia-version }}
+      - uses: julia-actions/julia-downgrade-compat@v2
+        with:
+          project: ${{ matrix.project }}
+          skip: Pkg,TOML
+      - uses: julia-actions/julia-buildpkg@v1
+        with:
+          project: ${{ matrix.project }}
+      - uses: julia-actions/julia-runtest@v1
+        with:
+          project: ${{ matrix.project }}
+          ALLOW_RERESOLVE: false
\ No newline at end of file

From 07a4d04496ef6863d5e7973dd6167cb95ba04c8c Mon Sep 17 00:00:00 2001
From: Christopher Rackauckas <accounts@chrisrackauckas.com>
Date: Wed, 30 Jul 2025 06:42:51 -0400
Subject: [PATCH 2/2] [ci-skip] Update
 .github/workflows/DowngradeSublibraries.yml

---
 .github/workflows/DowngradeSublibraries.yml | 1 -
 1 file changed, 1 deletion(-)

diff --git a/.github/workflows/DowngradeSublibraries.yml b/.github/workflows/DowngradeSublibraries.yml
index 8bac6cdab..9bb4d8951 100644
--- a/.github/workflows/DowngradeSublibraries.yml
+++ b/.github/workflows/DowngradeSublibraries.yml
@@ -19,7 +19,6 @@ jobs:
         downgrade_mode: ['alldeps']
         julia-version: ['1.10']
         project:
-          - '.'
           - 'lib/BracketingNonlinearSolve'
           - 'lib/NonlinearSolveBase'
           - 'lib/NonlinearSolveFirstOrder'