foxhunt

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jgrusewski 3c318953a7 feat(sp18 v2 P1.T3-T6): atomic delete SP13/SP16 hold_cost_scale chain

Deletes the entire reactive Hold-cost controller chain from SP13 P0a / SP16
P2 / SP16 T3 atomically — replaced by the SP18 D-leg structural opportunity-
cost reward landing in Phase 2.

Per DD7(c): observation chain preserved (slots 380, 382). Slot 380 becomes
constructor-init-only diagnostic at HOLD_COST_BASE=0.005, never updated.

18 consumer sites deleted (8 from plan checklist + 10 from A1-A10 audit
expansion):

Production code:
  - 3 reward subtraction sites (replaced with Phase 2 placeholder comments)
  - hold_cost_scale_update_kernel.cu (file deleted)
  - HoldCostScaleUpdateOps struct in gpu_aux_trunk.rs (~120 lines)
  - launch_hold_cost_scale_update in gpu_dqn_trainer.rs (forwarder)
  - Host controller block in training_loop.rs (~60 lines)
  - Slot constants [461..468) in sp14_isv_slots.rs
  - HOLD_COST_CONTROLLER_GAIN/FLOOR/CEIL constants in sp13_isv_slots.rs
  - state_layout.cuh mirror constants for [461..468)
  - build.rs cubin manifest entry
  - 7 fold-reset registry entries + 7 dispatch arms

Tests:
  - sp14_oracle_tests.rs lines 2173-2926 (11 tests + helpers, ~750 lines)
    — these include_bytes! the deleted cubin and cannot survive
  - lock_sp18_v2_pp4_retired_chain test (deleted, no inverse-contract
    replacement — locking a deletion is pointless ceremony per user call)

Layout fingerprint: range [461..468) is RESERVED gap (SP14-C.1 pattern;
ISV_TOTAL_DIM stays at 507 for checkpoint compatibility). Layout fingerprint
seed updated atomically: HOLD_COST_SCALE + HCS_* slots replaced with
RESERVED_GAP_461_TO_468=SP18_P1_RETIRED marker.

INTERIM STATE: 3 reward sites are now missing the per-bar Hold cost. This
is forbidden to L40S-dispatch until Phase 2 lands the
compute_sp18_hold_opportunity_cost device fn that replaces the deleted
subtraction. The audit doc records this hold.

Validation: cargo check --workspace clean; cargo test -p ml --lib passes
(state_reset_registry::every_fold_and_soft_reset_entry_has_dispatch_arm,
sp16_t3_wiener_welford_slot_layout_locked, sp18_combined_slot_layout_locked,
sp18_shrink_perturb_slot_layout_locked, sp18_fold_reset_entries_present —
all OK). Audit fingerprint: per-bar Hold-cost subtraction sites count
13 → 0 (smoking gun for complete deletion).

Plan: docs/superpowers/plans/2026-05-08-sp18-reward-shape-hold-attractor.md
Audit: docs/sp18-wireup-audit.md (full A1-A10 expansion + post-deletion
       fingerprint)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

2026-05-09 09:51:03 +02:00

infra

…

plans

feat(dqn): enable Branching DQN with 45 factored actions (5×3×3)

2026-03-11 22:00:13 +01:00

superpowers

plan(sp18 v2): Phase 0 Task 0.5 — pearl candidate draft

2026-05-09 01:20:08 +02:00

dqn-backward-nan-audit.md

fix(dqn): SP3 Mech 10 — ISV-driven h_s2 activation clamp + slot 49 diag

2026-04-30 17:26:25 +02:00