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jgrusewski 8fc41e3398 feat(dqn-v2): Plan 4 Task 2c.3c.1 — GrnBlock backward phase split (additive)

Plan 4 Task 2c.3c.1. Additive only — no production callers (2c.3c.4
wires them). Mirrors 2c.3b's forward phase split for the same
composition reason: cuBLAS Linear_b backward must run BETWEEN GLU
backward and ELU backward.

New methods on GrnBlock:
- backward_raw_phase1: LN_bwd + LN_dgamma_dbeta_p1 + LN_dgamma_dbeta_p2
  + GLU_bwd. Produces d_linear_b_out for caller's Linear_b backward,
  plus d_pre_LN (= d_residual = d_glu_out via implicit residual split).
- backward_raw_phase2: ELU_bwd. Takes d_elu_out from caller's Linear_b
  backward, produces d_linear_a_out for caller's Linear_a backward.

The existing monolithic backward() is left as-is for surface-area
minimization; will be deleted with 2c.5 cleanup if no production
callers emerge.

No CUDA kernel changes. Pure Rust dispatcher split.

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

2026-04-25 13:37:51 +02:00

infra

feat(infra): GPU training launcher with local/cloud routing

2026-02-23 11:19:58 +01:00

plans

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

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

superpowers

plan(dqn-v2): Plan 4 Task 2c GRN — further decomposed into 2c.1/2c.2/2c.3+4/2c.5

2026-04-25 11:53:10 +02:00

dqn-gpu-hot-path-audit.md

feat(dqn): Plan 1 Task 9 — atoms_update GPU kernel + AtomsMonitor + delete CPU paths