From d75a8b65adf9889f9f64649ea234ae8950c32f24 Mon Sep 17 00:00:00 2001
From: ChrisRackauckas-Claude <accounts@chrisrackauckas.com>
Date: Tue, 1 Sep 2026 01:09:54 -0400
Subject: [PATCH] fix: restore sublibrary metadata before downgrade QA

Co-Authored-By: Chris Rackauckas <accounts@chrisrackauckas.com>

Co-Authored-By: Codex <noreply@openai.com>

Agent-Harness: Codex CLI 0.151.0

Agent-Model: gpt-5.6-sol

Agent-Session: 01a059b1-5fa2-76a2-937a-33502aa35de5
---
 .github/workflows/sublibrary-downgrade.yml | 15 +++++++++++++++
 test/runtests.jl                           | 20 ++++++++++++++++++++
 2 files changed, 35 insertions(+)

diff --git a/.github/workflows/sublibrary-downgrade.yml b/.github/workflows/sublibrary-downgrade.yml
index 5c5174c..ea92b6f 100644
--- a/.github/workflows/sublibrary-downgrade.yml
+++ b/.github/workflows/sublibrary-downgrade.yml
@@ -167,6 +167,14 @@ jobs:
           [ -n "${{ inputs.skip }}" ] && effective="$effective,${{ inputs.skip }}"
           echo "Effective downgrade skip: $effective"
           echo "EFFECTIVE_SKIP=$effective" >> "$GITHUB_ENV"
+      - name: "Save project metadata for QA"
+        if: "${{ inputs.group-env-value == 'QA' }}"
+        shell: bash
+        run: |
+          save_dir="$RUNNER_TEMP/sciml-downgrade-original-projects"
+          project_file="${{ matrix.project }}/Project.toml"
+          mkdir -p "$save_dir"
+          cp --parents "$project_file" "$save_dir"
       - uses: julia-actions/julia-downgrade-compat@v2
         with:
           projects: ${{ matrix.project }}
@@ -180,6 +188,13 @@ jobs:
       - uses: julia-actions/julia-buildpkg@v1
         with:
           project: ${{ matrix.project }}
+      - name: "Restore project metadata before QA"
+        if: "${{ inputs.group-env-value == 'QA' }}"
+        shell: bash
+        run: |
+          save_dir="$RUNNER_TEMP/sciml-downgrade-original-projects"
+          project_file="${{ matrix.project }}/Project.toml"
+          cp "$save_dir/$project_file" "$project_file"
       - uses: julia-actions/julia-runtest@v1
         with:
           project: ${{ matrix.project }}
diff --git a/test/runtests.jl b/test/runtests.jl
index 1a5bc3e..131854a 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -629,3 +629,23 @@ end
     subs = wf("sublibrary-project-tests.yml")
     @test count("auto-precompile: \${{ inputs.auto-precompile }}", subs) == 4
 end
+
+@testset "sublibrary downgrade restores project metadata for QA" begin
+    txt = read(
+        joinpath(@__DIR__, "..", ".github", "workflows", "sublibrary-downgrade.yml"),
+        String,
+    )
+    save_at = findfirst("Save project metadata for QA", txt)
+    downgrade_at = findfirst("julia-actions/julia-downgrade-compat@v2", txt)
+    build_at = findfirst("julia-actions/julia-buildpkg@v1", txt)
+    restore_at = findfirst("Restore project metadata before QA", txt)
+    test_at = findfirst("julia-actions/julia-runtest@v1", txt)
+    positions = (save_at, downgrade_at, build_at, restore_at, test_at)
+
+    @test all(!isnothing, positions)
+    if all(!isnothing, positions)
+        @test first(save_at) < first(downgrade_at) < first(build_at) < first(restore_at) <
+            first(test_at)
+    end
+    @test count("if: \"\${{ inputs.group-env-value == 'QA' }}\"", txt) == 2
+end