jgrusewski
302992f63a
fix(sp11): B0 — controller renorm Σ=1 → mean=1 (post-A2 spec amendment)
...
Per spec §3.4.3 amended at 7ddaf9c51 on main: A2's Σweights=1
renormalization caused 6× reward-magnitude collapse on mutually-
exclusive components in experience_env_step (popart/micro/opp_cost
paths fire at most one per bar; weight 1/6 per fired path averages
1/6 of pre-SP11 reward magnitude).
Amended: weights normalize to mean(weights) = 1 (i.e., Σ = N = 6).
Each weight in [WEIGHT_HARD_FLOOR=0.01, MAX_WEIGHT=3.0]. Default
uniform = 1.0 each. Preserves pre-SP11 absolute scale on average.
Code change: reward_subsystem_controller_kernel.cu renormalization
step changes from `weights[c] = blends[c] / blend_sum` to
`weights[c] = min(MAX_WEIGHT, blends[c] × N / blend_sum)`. Anchors
N_COMPONENTS=6.0f and MAX_WEIGHT=3.0f added to the Invariant-1 const
float block at the top of the kernel.
3 A2 controller unit-test assertions updated:
- z_score_at_zero: weight_sum 1.0→6.0; per-component 1/6→1.0
- weights_renormalize_after_floor: assertion strengthened to
weight_sum ≤ N (cap binds in this pathological test where pre-cap
dominant weight ≈ 4.18 > MAX_WEIGHT=3.0); added per-component
≤ MAX_WEIGHT envelope check; added explicit cap-binding assertion
on dominant weight.
- saboteur_post_clamp_holds_min: weight assertions unaffected (this
test asserts only on s[6]/s[7], saboteur+curiosity are independent
of mean-vs-Σ choice).
Audit doc updated: docs/dqn-wire-up-audit.md gets a new
"SP11 B0 — controller renorm Σ=1 → mean=1 (2026-05-04)" section.
cargo check + release build clean. 6/6 SP11 GPU oracle tests pass on
RTX 3050 Ti. sp5_isv_slots (10/10) + state_reset_registry (4/4)
contract tests still pass.
Pre-requisite for B1b structural reward-composition refactor (§3.5.3)
which depends on the mean=1 semantic.
2026-05-04 08:40:33 +02:00
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