Neuromodulators

Neuromodulators

Generated with Grok Build: Grok 4.5 · xAI Imagine (/imagine)

Module: src/modulators.rs · 0.5.0 domain-agnostic API

Four channels

Field	Role (summary)
dopamine	Reward / STDP learning drive
serotonin	Stability / tone
acetylcholine	Focus / decay influence
norepinephrine	Arousal (engine stress multiplier); not legacy cortisol

API surface

NeuroModulators::default()
NeuroModulators::from_signals(&profile, da, se, ach, ne)  // requires &SignalProfile
mods.add_reward / add_norepinephrine / boost_focus / add_serotonin / decay
mods.apply_reward(&reward, &obs)  // GenericReward
mods.is_aroused / is_rewarded / is_focused / is_calm
apply_neuromodulation(&mods, &mut weights, &mut thresholds)

Type	Role
SignalProfile	Map external signals → modulator deltas (default(), hardware_calibrated())
Observation	Observation vector for reward traits (from_slice)
GenericReward	Trait for domain-specific reward shaping in downstream crates (e.g. limbic-critic)
UnitReward	Built-in mean-signal unit reward for tests/demos
apply_neuromodulation	Apply effects onto weight / threshold slices

Breaking (0.4 → 0.5)

• Removed: cortisol, tempo, aux_dopamine
• from_signals requires &SignalProfile first
• add_stress → add_norepinephrine; is_stressed → is_aroused

Full table: Release Notes.

Related

• Plasticity
• Ecosystem Boundaries
• Getting Started

---

Last updated: July 30, 2026 Updated by: Grok Build: Grok 4.5 Package tip reference: 553cc8e (main @ 0.5.0 + post-tag; tag v0.5.0 = 67c1573) Cubic: page-intro Devin DeepWiki: neuromod @ 553cc8e