Comprehensive design replacing every hardcoded magnitude multiplier in
the SP3 mechanism stack (Mechs 1, 2, 5, 6, 9, 10) plus pre-SP3 mechs in
the same magnitude-control surface, per feedback_isv_for_adaptive_bounds
and feedback_adaptive_not_tuned.
Core principle: the BOUND lives in an ISV slot, computed by a producer
kernel as p99 EMA of observed signal magnitude. Consumer reads the slot
and clamps directly — no multiplier between ISV read and clamp. Cold-
start ε from theoretical-init bootstrap (Xavier, etc.) — same theoretical-
constant category as Adam β values, not tuning knobs.
Architecture:
- 28 new ISV slots (7 base bounds × per-param-group split where appropriate)
- Per-signal P² (Jain-Chlamtac) quantile producer kernels
- Diagnostic = clamp engagement (sticky flag from producer's max-comparison)
- Migration in 3 layers: additive infra → atomic consumer flip → smoke
Out of scope: theoretical/structural constants (Adam β, Xavier formula,
attention 1/√d, hidden_dim, num_atoms). EMA rates stay as documented
statistical-design parameters (half-life ≈ observation time-window).
Estimated: ~2-3000 LOC across 3 layers, 1-2 weeks, 1 L40S smoke.
Awaiting user spec review before writing implementation plan.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
e00736ce9b