A cc-ci deploy overlay sitting in the recipe checkout as an untracked file (ghost's
compose.ccci-health.yml via install_steps) makes abra stamp chaos-version='<commit>+U' (U=untracked).
The commit still equals head_ref (HC1 satisfied) but the '+U' broke the exact-prefix match → spurious
upgrade-tier FAIL. Strip the working-tree-state marker before the commit match; HC1 preserved (commit
must still equal head_ref — a stale checkout's commit would not match even after stripping). General:
benefits every future cc-ci overlay recipe.
autonomic-bot
a7e2af444a