listClaudePluginRoots accepts a home parameter so callers (and tests)
can override the base directory, but the OMP registry path was constructed
via getPluginsDir() which always reads the global dirs resolver anchored
to os.homedir(). This caused every test that passed a temp dir as home to
receive the real user registry alongside the test fixture, producing
length mismatches (+1 root in every assertion).
Fix: add an optional home override to getPluginsDir(). The override only
short-circuits the resolver when home differs from RESOLVER_HOME (the
os.homedir() value captured at module load, i.e. what dirs is anchored
to). Production callers that pass os.homedir() match RESOLVER_HOME and
still go through the XDG-aware resolver, preserving read/write coherence
with the marketplace writer and the cache invalidator. Tests passing a
temp HOME mismatch and short-circuit to <home>/<configDir>/plugins for
deterministic isolation.
Miroslav Drbal
f613378bb7