The [scope-leak] reviewLevel=N enforcement=warn warning was firing on
many in-progress tasks for off-scope .changeset/FN-XXXX-*.md files (the
production signature on FN-4789, FN-4801, FN-4818 \u2014 their branches all
contained .changeset/FN-4811-*.md files from the in-progress fix stack).
By convention every task may add its own changeset entry under
.changeset/ per AGENTS.md 'Finalizing Changes' section, so .changeset/
files are now treated as always-allowed by the scope-leak guard
regardless of the task's declared file scope.
Cross-task changeset leakage is still caught by stronger downstream
guards (file-scope invariant at squash, post-merge audit) at much
higher signal-to-noise. This change only suppresses the noisy
per-execution warning that was flooding logs without adding any
defensive value.
Adds a new exported helper isAlwaysAllowedScopeLeakPath() so the
allowlist surface is easy to extend. Test coverage in
scope-leak-changeset-allowlist.test.ts.
Also (incorporated from interrupted merge state): loosens the
executing-task-lock.test.ts assertion that one losing-instance store
sees zero work-log entries rather than the brittle exact-count of
mockedCreateFnAgent invocations (the no-fn_task_done retry path can
fire on the winning instance, so the count varies).
Fusion-Task-Id: FN-4811