New ticket for Joseph (@TrudoJo)'s 6-dim procedural spatial-anchor
framework as the first verifier kernel under the #000013 v7-W reserved
namespace. A single committed 32-byte SHA-256 hash deterministically
expands into six 32-byte regions H1..H6 via the HMAC-SHA-512 KDF already
shipped in arborist/substrate/anchor_prg.py (#000035); each region drives
one quantized object dimension under a fixed canonical mapper. Domain
separation from #000035 by dedicated spatial_anchor_seed published in
the v7-W manifest -- preserves #000035's KAT freeze + dav1d 2026-05-11
final review intact.
Bundle:
- docs/tickets/ticket-000070-spatial-anchor-pi-w-object.md (718 lines):
full spec with 8 design-choice subsections, working Python sketch,
12-NOT scope boundaries, 8-row cross-references, five-step deletions,
10 open questions for dav1d.
- bench/spatial_anchor_validation.py: pure-stdlib pre-review evidence
(~2s, RNG-seed-pinned, reproducible). Five benches: avalanche,
cell-distribution uniformity, collision vs birthday-bound, cross-region
independence, domain separation.
- bench/spatial_anchor_validation_results.md: report from first run.
- Makefile: 'make bench-spatial-anchor [SPATIAL_N=N]' target + PHONY.
- docs/TICKETS.md: index row + Next ID 000070 -> 000071.
Bench headlines (N=10000):
- Avalanche mean 767.85 bits (PRF null 768, z=-0.49) -> PASS
- Cell-distribution chi^2 |z|<1 at L=2,3,4 -> PASS
- Birthday-bound ratio obs/exp 0.989/1.038 at populated L -> PASS
- Cross-region Pearson all 15 pairs < 2sigma -> PASS
- Domain separation Arm A 767.91 / Arm B exact 0 collision -> PASS
Five of dav1d's ten open questions (Q1 seed source, Q2 segmentation,
Q3 position mapper, Q8 endianness, Q9 KAT adversarial vectors) now
resolve with measurements rather than appeals to PRF authority.
Q4/Q5/Q6/Q7/Q10 remain non-empirical design decisions.
Status: open, awaiting dav1d review + fox go/no-go. No registry slot
booked, no substrate-paper amendment landed, no kernel module created.
russell@unturf.com
55b651f624