From 3a78114a747121209f2f169e26d30479d5ed6b91 Mon Sep 17 00:00:00 2001
From: Christopher Rackauckas <accounts@chrisrackauckas.com>
Date: Sat, 9 Aug 2025 10:20:29 -0400
Subject: [PATCH 1/4] Add Downgrade.yml and Fix Minimum Versions

I think a lot of downgrade CI in SciML is pointing to minimum version issues in Zygote, so I'm trying to now track that down here in isolation.
---
 .github/workflows/Downgrade.yml | 36 +++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)
 create mode 100644 .github/workflows/Downgrade.yml

diff --git a/.github/workflows/Downgrade.yml b/.github/workflows/Downgrade.yml
new file mode 100644
index 000000000..3eef51293
--- /dev/null
+++ b/.github/workflows/Downgrade.yml
@@ -0,0 +1,36 @@
+name: Downgrade
+on:
+  pull_request:
+    branches:
+      - master
+    paths-ignore:
+      - 'docs/**'
+  push:
+    branches:
+      - master
+    paths-ignore:
+      - 'docs/**'
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        group:
+          - Core
+        downgrade_mode: ['alldeps']
+        julia-version: ['1.10']
+    steps:
+      - uses: actions/checkout@v4
+      - uses: julia-actions/setup-julia@v2
+        with:
+          version: ${{ matrix.julia-version }}
+      - uses: julia-actions/julia-downgrade-compat@v2
+#        if: ${{ matrix.version == '1.6' }}
+        with:
+          skip: Pkg,TOML
+      - uses: julia-actions/julia-buildpkg@v1
+      - uses: julia-actions/julia-runtest@v1
+        with:
+          ALLOW_RERESOLVE: false
+        env:
+          GROUP: ${{ matrix.group }}

From 95b99b1b314c3639d462fc07cc56a7d801e5d9b5 Mon Sep 17 00:00:00 2001
From: Christopher Rackauckas <accounts@chrisrackauckas.com>
Date: Sat, 9 Aug 2025 10:27:29 -0400
Subject: [PATCH 2/4] Update Project.toml

---
 Project.toml | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/Project.toml b/Project.toml
index 8854103bb..52f4d9779 100644
--- a/Project.toml
+++ b/Project.toml
@@ -44,15 +44,15 @@ ChainRulesCore = "1.25.1"
 Colors = "0.12, 0.13"
 DiffRules = "1.4"
 Distances = "0.10"
-FillArrays = "0.8, 0.9, 0.10, 0.11, 0.12, 0.13, 1"
+FillArrays = "1"
 ForwardDiff = "0.10, 1"
-GPUArraysCore = "0.1.1, 0.2"
+GPUArraysCore = "0.2"
 IRTools = "0.4.12"
 LogExpFunctions = "0.3.1"
 MacroTools = "0.5"
-NaNMath = "0.3, 1"
+NaNMath = "1"
 PrecompileTools = "1"
-SpecialFunctions = "1.6, 2"
+SpecialFunctions = "2"
 Statistics = "1"
 Tracker = "0.2"
 ZygoteRules = "0.2.7"

From aac536a2c6a09125ef8850555c9fa9eceb3cc23b Mon Sep 17 00:00:00 2001
From: Christopher Rackauckas <accounts@chrisrackauckas.com>
Date: Sat, 9 Aug 2025 10:42:03 -0400
Subject: [PATCH 3/4] Update Project.toml

---
 Project.toml | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/Project.toml b/Project.toml
index 52f4d9779..9d0f8d6f5 100644
--- a/Project.toml
+++ b/Project.toml
@@ -37,18 +37,18 @@ ZygoteDistancesExt = "Distances"
 ZygoteTrackerExt = "Tracker"
 
 [compat]
-AbstractFFTs = "1.3.1"
+AbstractFFTs = "1.5"
 Atom = "0.12"
 ChainRules = "1.72.2"
 ChainRulesCore = "1.25.1"
-Colors = "0.12, 0.13"
-DiffRules = "1.4"
+Colors = "0.13"
+DiffRules = "1.15"
 Distances = "0.10"
 FillArrays = "1"
-ForwardDiff = "0.10, 1"
+ForwardDiff = "0.10.36, 1"
 GPUArraysCore = "0.2"
 IRTools = "0.4.12"
-LogExpFunctions = "0.3.1"
+LogExpFunctions = "0.3.29"
 MacroTools = "0.5"
 NaNMath = "1"
 PrecompileTools = "1"

From 1b58ff01ace33acec05d7c7eaaad4bfe046aedbc Mon Sep 17 00:00:00 2001
From: Christopher Rackauckas <accounts@chrisrackauckas.com>
Date: Sat, 9 Aug 2025 15:48:40 -0400
Subject: [PATCH 4/4] Update Project.toml

---
 Project.toml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Project.toml b/Project.toml
index 9d0f8d6f5..bbab73539 100644
--- a/Project.toml
+++ b/Project.toml
@@ -49,7 +49,7 @@ ForwardDiff = "0.10.36, 1"
 GPUArraysCore = "0.2"
 IRTools = "0.4.12"
 LogExpFunctions = "0.3.29"
-MacroTools = "0.5"
+MacroTools = "0.5.10"
 NaNMath = "1"
 PrecompileTools = "1"
 SpecialFunctions = "2"