The two fieldtest findings, resolved:
- friction: --parallel-instruments 0 now refuses in domain terms ("must be
a whole number of at least 1 — it bounds how many distinct instruments
are resident in parallel") via a custom clap value-parser, instead of
leaking Rust's NonZeroUsize wording; the zero-bound test pins the prose.
- spec_gap: the authoring guide's exit-code contract now states that a
gate-emptied cell (a std::gate leaving no survivors) is a successful
cell — exit 0 with an informational aura: note and a truncated
realization — and that exit 3 is reserved for cells that could not be
evaluated. Records observed behaviour; no code change.
Gates re-verified: workspace suite green, clippy -D warnings clean.
refs #277
claude
bfb8648925