Brummel
008692c043
Restore C18 reproducibility for generated (blueprint-sweep) runs (#158, acc 2): a sweep's topology is stored once, content-addressed by the topology_hash the manifest already carries, and `aura reproduce <family-id>` re-derives every persisted member bit-identically (C1) from the stored blueprint. - aura-registry: a dumb content-addressed bytes store — Registry::put_blueprint / get_blueprint / blueprints_dir over runs/blueprints/<hash>.json. No sha2 dep (caller owns the hash; reproduction's bit-identical compare is the integrity check); absent id -> Ok(None) (treat-as-empty, like load). - aura-cli: run_blueprint_member extracted from blueprint_sweep_family's member closure (behaviour-preserving; keystone stays green) so the sweep AND reproduce re-run the identical reduce-mode path — bit-identity by construction. The store write hooks the sweep persist seam (one blueprint per family, shared topo). reproduce_family_in loads each member's blueprint by hash, reconstructs the point from the recorded params (point_from_params, inverse of zip_params, over the WRAPPED signal's param_space so the prefixed knob names match), re-runs, and compares metrics. `["reproduce", id]` dispatch arm; refuse-don't-guess on an unknown id / missing stored blueprint (exit 2), DIVERGED -> exit 1. Dependency decision (per-case review, ratified): enabled serde_json `float_roundtrip`. Stored member metrics round-trip through families.jsonl as f64 JSON; the default parser can be 1 ULP off, which would make disk-loaded != recomputed and "bit-identical" (C1) physically impossible. The feature guarantees exact f64 round-trip. Blast-radius clean (full workspace suite green); it serves determinism, the invariant reproduction rests on. Canary: f64_blueprint_param_survives_store_round_trip_bit_identically. Two plan bugs caught + fixed by the implement loop and verified: reproduce's param_space must come from the wrapped signal (prefixed names, the #167 lockstep), and the family id is 0-indexed (live-0 / smacross-0, not -1). Verified: full workspace suite green (51 suites); clippy -D warnings clean; and the binary end-to-end — `aura sweep` (3 members, one shared stored blueprint) then `aura reproduce live-0` (3/3 bit-identical incl the open-at-end member), unknown id -> exit 2. acc 1 (graph introspect --content-id) + acc 3 (Tier-1 id stability) land in iteration 2 (plan 0094b). refs #158