12 files changed, 42 insertions, 0 deletions
diff --git a/.github/workflows/api-misskey-js.yml b/.github/workflows/api-misskey-js.yml
index e21738c4f4..6f4219b54b 100644
--- a/.github/workflows/api-misskey-js.yml
+++ b/.github/workflows/api-misskey-js.yml
@@ -9,6 +9,10 @@ on:
     paths:
       - packages/misskey-js/**
       - .github/workflows/api-misskey-js.yml
+
+env:
+  COREPACK_DEFAULT_TO_LATEST: 0
+
 jobs:
   report:
 
diff --git a/.github/workflows/get-api-diff.yml b/.github/workflows/get-api-diff.yml
index 46c726b986..6805e8bc3c 100644
--- a/.github/workflows/get-api-diff.yml
+++ b/.github/workflows/get-api-diff.yml
@@ -9,6 +9,10 @@ on:
     paths:
       - packages/backend/**
       - .github/workflows/get-api-diff.yml
+
+env:
+  COREPACK_DEFAULT_TO_LATEST: 0
+
 jobs:
   get-from-misskey:
     runs-on: ubuntu-latest
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 9785bb5744..2f6938d2e4 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -28,6 +28,10 @@ on:
       - packages/misskey-reversi/**
       - packages/shared/eslint.config.js
       - .github/workflows/lint.yml
+
+env:
+  COREPACK_DEFAULT_TO_LATEST: 0
+
 jobs:
   pnpm_install:
     runs-on: ubuntu-latest
diff --git a/.github/workflows/locale.yml b/.github/workflows/locale.yml
index 2eb4ca3ad9..95d29bf828 100644
--- a/.github/workflows/locale.yml
+++ b/.github/workflows/locale.yml
@@ -9,6 +9,10 @@ on:
     paths:
       - locales/**
       - .github/workflows/locale.yml
+
+env:
+  COREPACK_DEFAULT_TO_LATEST: 0
+
 jobs:
   locale_verify:
     runs-on: ubuntu-latest
diff --git a/.github/workflows/on-release-created.yml b/.github/workflows/on-release-created.yml
index 8ca2ed9efb..fc224a6239 100644
--- a/.github/workflows/on-release-created.yml
+++ b/.github/workflows/on-release-created.yml
@@ -6,6 +6,9 @@ on:
 
   workflow_dispatch:
 
+env:
+  COREPACK_DEFAULT_TO_LATEST: 0
+
 jobs:
   publish-misskey-js:
     name: Publish misskey-js
diff --git a/.github/workflows/storybook.yml b/.github/workflows/storybook.yml
index dfba46a8c8..be294201f0 100644
--- a/.github/workflows/storybook.yml
+++ b/.github/workflows/storybook.yml
@@ -13,6 +13,9 @@ on:
       # This is a waste of chromatic build quota, so we don't run storybook CI on pull requests targets master.
       - master
 
+env:
+  COREPACK_DEFAULT_TO_LATEST: 0
+
 jobs:
   build:
     # chromatic is not likely to be available for fork repositories, so we disable for fork repositories.
diff --git a/.github/workflows/test-backend.yml b/.github/workflows/test-backend.yml
index debfe24819..99a9f99b75 100644
--- a/.github/workflows/test-backend.yml
+++ b/.github/workflows/test-backend.yml
@@ -18,6 +18,10 @@ on:
       - packages/misskey-js/**
       - .github/workflows/test-backend.yml
       - .github/misskey/test.yml
+
+env:
+  COREPACK_DEFAULT_TO_LATEST: 0
+
 jobs:
   unit:
     name: Unit tests (backend)
diff --git a/.github/workflows/test-federation.yml b/.github/workflows/test-federation.yml
index c4546a0590..74cdff80f1 100644
--- a/.github/workflows/test-federation.yml
+++ b/.github/workflows/test-federation.yml
@@ -15,6 +15,9 @@ on:
       - packages/misskey-js/**
       - .github/workflows/test-federation.yml
 
+env:
+  COREPACK_DEFAULT_TO_LATEST: 0
+
 jobs:
   test:
     name: Federation test
diff --git a/.github/workflows/test-frontend.yml b/.github/workflows/test-frontend.yml
index 51e0b0e8b8..6c09896d06 100644
--- a/.github/workflows/test-frontend.yml
+++ b/.github/workflows/test-frontend.yml
@@ -22,6 +22,10 @@ on:
       - packages/backend/**
       - .github/workflows/test-frontend.yml
       - .github/misskey/test.yml
+
+env:
+  COREPACK_DEFAULT_TO_LATEST: 0
+
 jobs:
   vitest:
     name: Unit tests (frontend)
diff --git a/.github/workflows/test-misskey-js.yml b/.github/workflows/test-misskey-js.yml
index c72a2470a4..d88dc18bd8 100644
--- a/.github/workflows/test-misskey-js.yml
+++ b/.github/workflows/test-misskey-js.yml
@@ -14,6 +14,10 @@ on:
     paths:
       - packages/misskey-js/**
       - .github/workflows/test-misskey-js.yml
+
+env:
+  COREPACK_DEFAULT_TO_LATEST: 0
+
 jobs:
   test:
     name: Unit tests (misskey.js)
diff --git a/.github/workflows/test-production.yml b/.github/workflows/test-production.yml
index 4a55f4803c..5269358e38 100644
--- a/.github/workflows/test-production.yml
+++ b/.github/workflows/test-production.yml
@@ -9,6 +9,7 @@ on:
 
 env:
   NODE_ENV: production
+  COREPACK_DEFAULT_TO_LATEST: 0
 
 jobs:
   production:
diff --git a/.github/workflows/validate-api-json.yml b/.github/workflows/validate-api-json.yml
index 0d254898f8..65afcd4cd0 100644
--- a/.github/workflows/validate-api-json.yml
+++ b/.github/workflows/validate-api-json.yml
@@ -12,6 +12,10 @@ on:
     paths:
       - packages/backend/**
       - .github/workflows/validate-api-json.yml
+
+env:
+  COREPACK_DEFAULT_TO_LATEST: 0
+
 jobs:
   validate-api-json:
     runs-on: ubuntu-latest