Milestone-close fieldtest for "Runway — real-data ergonomics & honesty
hardening". Four curated end-to-end scenarios derived top-down from the
milestone promise, run as a downstream consumer against real GER40/EURUSD M1
bars (public interface only; no crates/*/src read):
1. per-instrument pip honesty (#22) — GER40 index pip 1.0 AND EURUSD forex
pip 0.0001 both honest end-to-end; AAPL.US/FOOBAR un-vetted refused
exit 2, no stdout leak
2. real GER40 M1 open via open_ohlc from aura-ingest ALONE (#80/#81/#92) —
no data-server dep, 53173 real bars, C4 O/H/L/C order, ts-window inverse
3. multi-tap ts-join (#93) — two taps at different cadences, 27744 rows,
0 by-ts mismatches; warm-up None rows where a positional zip would corrupt
4. run-registry coherence (#73/#82) — list/rank retired exit 2, families/
family live, two-store Registry read-back + rustdoc
Findings: 4 working, 1 friction, 1 spec_gap.
- friction: Cell exposes only from_i64/from_f64/... while the side-by-side
Scalar is a tagged enum with public I64(..)/F64(..) variants. The natural
param-authoring entry point is Scalar (Cell is the hot-path buffer carrier),
so the wrong reach is a self-correcting compile snag — ergonomic only.
Filed as a follow-up idea.
- spec_gap: unknown family id exits 0 empty — ratified into the C18 note in
the preceding commit (treat-as-empty contract).
Gate verdict: GREEN. All seven axes mapped to a covering scenario and exercised
on real bars; both finding classifications and the one material coverage gap
were adversarially re-verified. That gap — #22's FX-vetted pip face, untested by
the original scenario set — was probed (EURUSD -> sim-optimal(pip_size=0.0001),
FX-scaled, not index-mis-scaled) and folded into scenario 1, so the pip promise
is demonstrated on both positive faces. Every scenario re-run independently on
HEAD before commit.
Brummel
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