PR #2433 (notifications/claude/channel) shipped 'import inbox as
_inbox_module' inside a2a_mcp_server.py:main(). The build script's
import rewriter expands plain 'import inbox' to
'import molecule_runtime.inbox as inbox', so the original source
became 'import molecule_runtime.inbox as inbox as _inbox_module',
which is invalid Python.
Caught at the publish-runtime + PR-built-wheel-smoke gate (the
SyntaxError trace is in run 25200422679). The wheel didn't ship to
PyPI because publish-runtime's smoke-import step refused to install
it, but staging is currently sitting on a broken-build commit until
this fix-forward lands.
Changes:
- a2a_mcp_server.py: lift `import inbox` to top of file (rewriter
produces clean `import molecule_runtime.inbox as inbox`), call
inbox.set_notification_callback directly in main()
- build_runtime_package.py: rewrite_imports() now raises ValueError
when it sees 'import X as Y' for any X in the workspace allowlist,
instead of silently producing a syntax-error wheel. Operator gets
a clear actionable error at build time pointing at the offending
line + suggested rewrites ('from X import …' or plain 'import X').
The build-time gate (this PR's rewriter check) catches the regression
class earlier than the smoke-time gate (PR #2433's failure). Adding
'PR-built wheel + import smoke' to staging branch protection's
required checks is filed separately so this class doesn't merge again.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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