Adds a step between the existing import smoke and the GHCR push that
boots the just-built image with MOLECULE_SMOKE_MODE=1, which routes
molecule-runtime through the new smoke_mode.run_executor_smoke() —
invokes executor.execute(stub_ctx, stub_queue) once with a 10s timeout.
Healthy import tree → execution proceeds far enough to hit a network
boundary and times out (exit 0). Broken lazy import inside an
`async def execute(...)` body → ImportError/ModuleNotFoundError
(exit 1). The 2026-04-2x v0→v1 a2a-sdk migration shipped 5 such
regressions in templates that the existing static import smoke missed.
Skip path: when the installed runtime predates 0.1.60 (pre-smoke_mode),
the step prints a warning + exits 0. Templates pinned to older runtimes
keep publishing without this gate flipping red; cascade-triggered
builds (which forward the just-published version as RUNTIME_VERSION)
get the gate automatically.
Belt-and-suspenders `timeout 60` wrapper so smoke_mode itself can't
wedge the runner past one minute per template.
After merge, bump v1 tag to point at the new main SHA (caller repos
pin to @v1; the change has no effect until the moving tag advances).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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