[AdaWorldAPI]

Purpose

Isolate Google's idea of a damped Hebbian update Δz = eta * s * p * (1 - tanh(abs(z))) as an experimental candidate, not a rewrite of NARS F/C or an instruction to modify immutable Palette256.

Current architecture

crates/lance-graph-contract/src/episodic_edges.rs already encodes the hot episodic promote (MRU order) and explicitly leaves numerical plasticity to the co-addressed CausalEdge64. A separate owner must decide storage/learning contracts. No new register bits.

New independent falsifiers

• Inertness: learning rate=0 and either activation=0 leave z unchanged.
• Can-fire: coactivation at z=0 yields positive increase; opposing activation yields negative change.
• Can-stay-silent: equal stimuli at high |z| give smaller updates than at z=0, yet no source data or immutable codebook is touched.
• A repeated 64-step high-activity sequence grows more slowly than undamped linear Hebbian accumulation.
• Existing episodic MRU ordering remains independent of the suggested weight update.

Important boundaries

The scalar formula is a candidate learning policy, NOT certified Bayesian updating, NOT a proven anti-hallucination mechanism, and NOT a production bitfield writer. The numerical update is evaluated only in this test. Domain and effect state are explicit. Await D-CGW/D-HL owner admission and compare against independent unsaturated baseline before integration.

Verification

cargo test --manifest-path crates/lance-graph-contract/Cargo.toml --test episodic_hebb_saturation_probe.
Lab test only, no production code changed.

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[AdaWorldAPI]

This test now lives in #1713 (commit b3d26a4), where it serves as the production-surface counter-probe for the canonical #1709–#1717 series. It passes locally (release). I'll close this PR as superseded once #1713 has landed.

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Review	Status	Commit	Review trigger
📝 Code Review	🔄 Running since 2026-10-22T21:55:38.393949Z	c687758	Draft marked ready

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