`aura run --harness stage1-r [--real <SYM>] [--trace <n>]` now runs a Stage-1 R
backtest and prints its signal-quality metrics (the R block) in the RunReport
JSON - one shell call, the research loop's primary verb, ergonomic for Claude
to drive.
What shipped:
- vol_stop + risk_executor promoted from test fixtures to public aura-engine
composite-builders, with a StopRule{Fixed,Vol} axis (C11). aura-std becomes a
normal dependency of aura-engine (the composites are the engine's convenience
layer over the standard nodes - the sibling tier of summarize_r; the graph
stays acyclic: aura-engine -> aura-std -> aura-core). Both fixtures call the
public fns; a Vol-backed RED test pins the new match arm.
- stage1_r_blueprint fans one bias into BOTH a SimBroker (pip) and the
RiskExecutor (R), so one report carries both yardsticks honestly. run_stage1_r
folds summarize (pip) + summarize_r (R, round_trip_cost 0.0 - Stage-1 is
frictionless signal quality) and sets RunMetrics.r = Some(..). An r_equity tap
(cum_realized_r + unrealized_r via LinComb) persists through a separate 3-tap
persist_traces_r and renders via the existing `aura chart --tap r_equity`.
- `aura run --harness <sma|macd|stage1-r>`: a parse_run_args tokenizer replaces
the five `run` literal-slice arms so --harness/--real/--from/--to/--trace
compose in any order; --macd kept as a back-compat alias; --harness sma the
default. A compile-time match over Rust-authored built-ins - not a runtime node
registry, not a DSL (C9/C17): the CLI runs an authored harness, it does not
wire one.
Back-compat: --harness sma/macd leave RunMetrics.r = None, so skip_serializing_if
keeps pip-only and legacy runs.jsonl JSON byte-unchanged; the plain-run tap list
stays ["equity","exposure"].
Refactor beyond the plan (verified behavior-equivalent): the old standalone
parse_real_args was orphaned by the new tokenizer, so it and its now-redundant
unit test were removed and run's --real parsing inlined into parse_run_args. The
--real strictness (empty-symbol, non-i64 ms, repeated-flag, window-requires-real
-> exit 2) is preserved and now pinned by
parse_run_args_rejects_malformed_real_and_repeated_flags (added to restore the
deleted coverage). All five run_real integration tests stay green.
Verification: cargo build/test --workspace green (every crate, 0 failed); clippy
--workspace --all-targets -D warnings clean. The full diff was adversarially
reviewed (run-arg refactor equivalence against the removed function, harness
wiring, C1/C2/C9/C17, the serde back-compat pin) - verdict SOUND; the one flagged
coverage gap is closed here.
Follow-on (noted, not done): the stage1-r manifest reuses the
"sim-optimal(pip_size=...)" broker label; a dedicated "risk-executor" label would
read more honestly for a dual-tap harness that runs a RiskExecutor branch.
closes#129
refs #117#128
Brummel
a6fc48daa7