- Skip CI for draft PRs and redundant master-push re-runs; membrowse nightly. - Add smoke test (8 configs, CFLAGS=-Werror, post-merge tree, fail-fast on conflicts). - Add wait-for-smoke composite action for downstream CI gating. - Add check-source-text + bash -n + shellcheck workflow (script in make dist). - Cache apt-get update in install-apt-deps composite on cache hit.
This adds caching for apt and should make things a bit more stable and faster.