Suppress developer mode warnings in CI

.github/workflows/copilot-setup-steps.yml

@@ -22,6 +22,9 @@ jobs:
           core: true
           cask: true
 
+      # Copilot ignores job-level env; persist developer mode for the agent session.
+      - run: brew developer on
+
       - run: brew install-bundler-gems --groups=all
 
       # install Homebrew formulae we might need

.github/workflows/docker.yml

@@ -190,7 +190,7 @@ jobs:
           labels: ${{ needs.generate-tags.outputs.labels }}
 
       - name: Run brew test-bot --only-setup
-        run: docker run --env HOMEBREW_GLIBC_TESTING --rm brew brew test-bot --only-setup
+        run: docker run --env HOMEBREW_DEVELOPER=1 --env HOMEBREW_GLIBC_TESTING --rm brew brew test-bot --only-setup
 
       - name: Log in to GitHub Packages (BrewTestBot)
         if: fromJSON(steps.attributes.outputs.push)

.github/workflows/sorbet.yml

@@ -27,6 +27,8 @@ jobs:
   tapioca:
     if: github.repository == 'Homebrew/brew'
     runs-on: macos-26
+    env:
+      HOMEBREW_DEVELOPER: 1
     steps:
       - name: Set up Homebrew
         id: set-up-homebrew

.github/workflows/spdx.yml

@@ -21,6 +21,8 @@ jobs:
   spdx:
     if: github.repository == 'Homebrew/brew'
     runs-on: ubuntu-latest
+    env:
+      HOMEBREW_DEVELOPER: 1
     steps:
       - name: Set up Homebrew
         id: set-up-homebrew

.github/workflows/sponsors-maintainers-man-completions.yml

@@ -30,6 +30,8 @@ jobs:
   updates:
     runs-on: ubuntu-latest
     if: github.repository == 'Homebrew/brew'
+    env:
+      HOMEBREW_DEVELOPER: 1
     steps:
       - name: Setup Homebrew
         id: set-up-homebrew

.github/workflows/vendor-gems.yml

@@ -33,6 +33,8 @@ jobs:
     permissions:
       contents: write
       pull-requests: read
+    env:
+      HOMEBREW_DEVELOPER: 1
     steps:
       - name: Set up Homebrew
         id: set-up-homebrew

.github/workflows/vendor-version.yml

@@ -16,6 +16,8 @@ defaults:
 jobs:
   check-vendor-version:
     runs-on: ubuntu-latest
+    env:
+      HOMEBREW_DEVELOPER: 1
     steps:
       - name: Set up Homebrew
         id: set-up-homebrew

Dockerfile

@@ -101,7 +101,7 @@ RUN --mount=type=cache,target=/home/linuxbrew/.cache,uid="${USER_ID}" \
   && git -C .linuxbrew/Homebrew remote set-url origin https://github.com/Homebrew/brew \
   && git -C .linuxbrew/Homebrew fetch origin \
   && HOMEBREW_NO_ANALYTICS=1 HOMEBREW_NO_AUTO_UPDATE=1 brew tap --force homebrew/core \
-  && brew install-bundler-gems --groups=all \
+  && HOMEBREW_DEVELOPER=1 brew install-bundler-gems --groups=all \
   && brew cleanup \
   && { git -C .linuxbrew/Homebrew config --unset gc.auto; true; } \
   && { git -C .linuxbrew/Homebrew config --unset homebrew.devcmdrun; true; } \