Cycle A of milestone 'The World — parameter-space & sweep'. A node now declares
its tunable parameters in its C8 schema, and a blueprint aggregates them into one
flat, inspectable param-space — the root that unlocks the C12 orchestration axes
(#31 bind, #32 sweep), filling the gap C8/C23 name 'deliberately not in the schema
yet'.
- aura-core: ParamSpec { name: String, kind: ScalarKind } as a third schema-
declaration type; NodeSchema gains a third field 'params'. name is String (not
&'static like FieldSpec) because a vector knob carries a runtime index and
aggregation prefixes the composite path.
- aura-std: Sma declares [length:I64], Exposure [scale:F64], LinComb expands to N
flat [weights[i]:F64] (N = its input arity, topology-fixed per C19); Sub/Add/
SimBroker/Recorder declare none (pip_size is metadata, C10/C15; Recorder is
wiring).
- aura-engine: Blueprint::param_space() walks the graph-as-data depth-first in
lower_items order, path-qualifying via the already-public Composite::name() — a
read-only projection (C9). compile/inline_composite/lower_items are untouched, so
the compilat stays bit-identical (composite_sma_cross_runs_bit_identical_to_hand_wired
and the golden render tests stay green).
Design: param identity is positional (slot after the deterministic inline order,
C23 'by index not name'); the path-qualified name is a non-load-bearing debug
symbol — same-type siblings in one composite share a name, uniqueness is at the
slot. Flat over a structured arity-bearing ParamSpec because flattening is
unavoidable (a sweep enumerates a flat point-space) and structure-in-the-runtime
is the nested-composite reading C23 rejects (see spec 0015 for the full rationale).
Scope is declaration + aggregation + inspection only; binding (#31), sweep
enumeration (#32), search-range, validity-constraint, and default-range/slider are
deferred. An E2E test pins the load-bearing C23/#31 invariant: param_space() slot
order mirrors compile()'s flat-node param order, kind-by-slot, on the SMA-cross
harness. fieldtests/ (excluded crates) left as frozen snapshots.
Verified: cargo build/test --workspace green (64 tests), clippy --all-targets -D
warnings clean; compile/inline diff empty.
closes#30
Brummel
931109df58