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18 changes: 18 additions & 0 deletions .devcontainer/Dockerfile
Original file line number Diff line number Diff line change
@@ -1,3 +1,21 @@
# TEMPORARY WORKAROUND:
# This removes the legacy Yarn APT repository to unblock Codespaces pre-builds
# failing with:
Comment on lines +1 to +3
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Copilot AI Feb 3, 2026

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The PR description mentions adding a matching temporary-workaround comment block to .devcontainer/devcontainer.json, but that file does not currently contain any Yarn/devcontainer workaround comments. Please either update .devcontainer/devcontainer.json to include the intended comment block or adjust the PR description to reflect only the Dockerfile changes.

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# GPG error: https://dl.yarnpkg.com/debian
# stable InRelease: The following signatures were invalid:
# EXPKEYSIG 23E7166788B63E1E Yarn Packaging <yarn@dan.cx>
#
# Root cause: expired/invalid Yarn signing key in the default Microsoft
# devcontainer base image causing `apt-get update` to fail and abort
# devcontainer feature installation.
#
# Tracking:
# - https://2u-internal.atlassian.net/browse/BOMS-394
# - https://2u-internal.atlassian.net/browse/BOMS-402
#
# IMPORTANT: Revert this change after confirming the upstream image no longer
# includes the broken Yarn APT configuration.

FROM mcr.microsoft.com/devcontainers/universal:latest

# Fix: remove legacy Yarn apt repo that can break apt-get update with EXPKEYSIG
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