Public-interface-only field test of the walking-skeleton closing seam (#8):
the `aura run` CLI and the reusable aura-std::Recorder sink. A standalone
consumer crate (path-deps on the three engine crates, as a C16 project would)
drives the real binary as a subprocess and wires Recorder via the raw
Harness::bootstrap API.
Examples (all built from HEAD and ran green):
- c0010_1: drive `aura run` as a downstream CLI/jq consumer — single-line JSON
report, byte-identical across two runs (C1), bad-args → exit 2 + exact usage on
stderr with empty stdout.
- c0010_2: wire Recorder onto Sma(3) via raw bootstrap, drain the mpsc::Receiver
— rows match the rustdoc warm-up model exactly.
- c0010_3: Recorder over [I64, Bool, Timestamp] — the four-kind claim (never
exercised by the CLI's f64-only path) holds, verified from rustdoc alone.
Findings: 0 bugs, 4 working, 1 spec_gap, 1 friction.
- [spec_gap] `aura run <trailing-arg>` is accepted (exit 0), not rejected — the
arg parse keys only on the first token being `run` and ignores the rest. The
cycle_scope's "any other or missing subcommand -> exit 2" does not unambiguously
cover `run <junk>`; the binary chose the lenient reading. Tracked for a
ratify-or-tighten decision.
- [friction] verifying the documented {manifest, metrics} JSON nesting needs a
hand-rolled string walker — the zero-dep consumer has only to_json() and no
typed read-path. Low-priority tidy.
Both non-bug findings filed to the forward queue; neither blocks the cycle.
