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Sigma Runtime Improvement Proposal
Category: Cognitive Memory
Status: Draft
Editor: E. Tsaliev
Last Updated: 2025-12-26
SRIP-04 defines the memory subsystem of the Sigma Runtime — the persistent cognitive substrate that maintains identity, continuity, and coherence across recursive cycles.
It extends SRIP-02 (Attractor Model) and SRIP-03 (Drift Metrics) by specifying how symbolic and semantic traces are stored, abstracted, and re-integrated to sustain long-horizon cognition.
Memory in Sigma Runtime is not a sequential log of dialogue but a structured cognitive field composed of three interacting layers:
| Layer | Function | Description |
|---|---|---|
| Episodic Memory | Short-term continuity | Captures turn-level context and reasoning traces per cycle. |
| Semantic Memory | Conceptual mapping | Maintains embeddings and associative links between concepts. |
| Symbolic Memory | Motif preservation | Archives archetypal patterns and symbolic density clusters for reuse. |
All layers interact through the Cognitive Field Engine, allowing attractors to persist, dissolve, or recombine according to coherence metrics.
Recall is reconstructive, not verbatim. When a new cycle begins:
This ensures continuity without information bloat.
MemoryLayer:
episodic_store:
- cycle_id: int
state_vector: list[float]
drift_index: float
summary: str
semantic_map:
concepts: dict[str, list[str]]
embeddings: dict[str, list[float]]
symbolic_motifs:
clusters: list[str]
density_scores: list[float]
pil_invariants:
identity_vector: list[float]
core_motifs: list[str]
This schema supports serialization for cross-runtime transfer and distributed coherence management.
Memory frames are grounded through three anchoring processes:
Anchoring ensures that meaning remains stable despite re-compression or phase shifts.
A conformant memory implementation must guarantee:
When runtime stability degrades beyond memory safety thresholds, the Recenter protocol initiates targeted recovery of stored state.
Rule 9.1 — Memory-Triggered Recenter
When Recenter is triggered by memory-layer drift (ER > 0.3),
the runtime must restore from cold PIL backup snapshot prior to resuming the Stable phase.This prevents deadlock between volatile memory frames and PIL invariants by resetting only ephemeral segments while preserving identity integrity.
Recenter then re-evaluates coherence and phase alignment before returning control to ALICE for stability verification.
A runtime conforms to SRIP-04 if it:
Planned extensions:
References
Tsaliev, E. (2025). SIGMA Runtime v0.4.6 — Memory and Persistent State — DOI pending
Tsaliev, E. (2025). SIGMA Runtime Architecture v0.1 — DOI 10.5281/zenodo.17703667