Signature Index: A Deterministic Observed-Support Memory for Repeated State-Space Exploration

This record contains the first public technical report and reproducible reference artifact for Signature Index (SI), a deterministic observed-support memory method for repeated state-space exploration and exact query evaluation.

The report introduces SI as a finite observed-support memory over structured records, designed to support repeated exact queries, projections, restrictions, threshold/order predicates, support inspection, neighborhood queries, additive payloads, merge operations, and signed updates/removals. The accompanying reference implementation is intentionally small and semantic: it is designed to make the core behavior inspectable and reproducible, not to serve as a production-optimized benchmark engine.

The release includes:

• the technical report PDF,

• a reference implementation in Python,

• reproducibility instructions,

• expected-output snapshots and tests,

• summary tables and figures used in the report,

• release-readiness and repository-layout notes,

• a SHA-256 manifest for integrity checking.

The experimental material includes HEP-style validation summaries and calibrated scaling/break-even estimates. Measured results, derived quantities, and calibrated estimates are distinguished in the report and accompanying tables.

Licensing: the technical report and documentation are licensed under Creative Commons Attribution 4.0 International (CC BY 4.0). The reference implementation code is licensed under the Apache License 2.0.

Code and artifact repository: https://github.com/mlesniak75/signature-index-artifact

DOI: 10.5281/zenodo.20584373