The queue is a working plan, not a record: git log already carries what landed on
each step, so committing the plan duplicates it and invites the two to disagree.
.scratch/ is gitignored and skipped by the gate the way ideas/ and reference/ are,
so exploratory files there need not compile.
state.md keeps a conditional pointer rather than a path it cannot promise: if the
scratch file is absent, the log is the plan.
bdeshi