srmech 0.2.0

Stored-Relationship Mechanism research package: home of the Attested Multi-Source Collector/Catalog (AMSC) framework — Mathematical Provenance Record v1 on-disk format, descriptor TOML loader, six adapters (html/json/csv/netcdf/geotiff/literature), universal catalog bridge with register_attested_root cross-package overlay, and schema-gap-driven trigger. Native C dispatch (SHA-256 + NDJSON line reader) with pure-Python fallback for Pyodide / WASM.

srmech

Status: v0.2.0 on PyPI. The Task #201 build-out (rc3 → rc9, then v0.2.0rc1 → rc2 on TestPyPI) ships srmech at peer quality with ephemerides-spectral: native C dispatch for SHA-256 + NDJSON line reader, scikit-build-core + CMake build, cibuildwheel matrix (Linux/macOS/Windows × py3.10–3.14), pure-Python fallback for Pyodide / WASM, and JPL Power-of-Ten audit. Cross-package integration with ephemerides-spectral verified during the rc series. The earlier v0.1.0 shipped the pure-Python AMSC framework via the Task #197 refactor.

srmech (Stored-Relationship Mechanism) is a research package. It ships the Attested Multi-Source Collector/Catalog (AMSC) framework — the Mathematical Provenance Record (MPR) v1 on-disk format, descriptor TOML loader, six fetch/parse adapters, and a universal catalog bridge surface that downstream packages register their own catalog SSOTs with at import time. Native C for the SHA-256 attestation hash + NDJSON streaming reader; pure-Python fallback for Pyodide / WASM environments.

Why "Collector/Catalog"?

Both readings of AMSC are correct and the abbreviation is the same either way:

• At collection time (T1 / T3 lifecycle stages — fetch / live-query / re-bake), the adapter classes are collecting attested rows from upstream archives. The framework's name describes what it's doing in that moment: Attested Multi-Source Collector.
• After collection, the resulting NDJSON SSOTs are a catalog of attested data — committed into the package, registered into the universal bridge by downstream consumers, queryable through list_attested_sources() / get_attested_dataset(). The same framework name describes the post-collection state: Attested Multi-Source Catalog.

Both names abbreviate to AMSC. Pick whichever fits the lifecycle stage you're describing — the framework is one thing wearing two hats.

The package was extracted from ephemerides-spectral's _research/ mirror in Task #197 so that other spectral-research packages can consume the AMSC framework without depending on ephemerides-spectral. The catalog SSOTs themselves do NOT migrate — each downstream package registers its own root via srmech.amsc.catalog.register_attested_root(path, source=...).

Public API

from srmech.amsc import (
    MPRRecord, MPR_SCHEMA_VERSION, read_ndjson, write_ndjson, sha256_bytes,
    Descriptor, load_descriptor, discover_descriptors, render_template, descriptor_hash,
    list_attested_sources, get_attested_dataset, get_attested_descriptor,
    attestation_audit, register_attested_root, list_registered_roots,
    use_local_kernel, clear_local_kernel, get_local_kernel_state,
)

Cross-package catalog registration

The load-bearing API for cross-package use:

from pathlib import Path
from srmech.amsc import catalog as _amsc_catalog

_amsc_catalog.register_attested_root(
    Path(__file__).resolve().parent / "_research" / "attested",
    source="ephemerides-spectral",
)

Call this once at package-import time. Subsequent list_attested_sources(), get_attested_dataset(), etc. enumerate the union of srmech's own amsc/attested/ plus every registered root, in registration order. Duplicate source_key resolves first-registered-wins with a warning.

Adapter classes

Six adapters cover the realistic source space:

adapter	class	network?
html_scraper	fetched	yes (BeautifulSoup)
json_api	fetched	yes (paginated JSON)
csv_bulk	fetched	yes (CSV/XYZ bulk)
netcdf_grid	fetched	stub (gated behind extras)
geotiff_bbox	fetched	stub (gated behind extras)
literature_curated	curated	no (NDJSON committed directly)

The curated class never touches the network: rows are committed as data-only NDJSON and srmech synthesises full MPR attestation blocks at read time from each row's per-row DOI.

Install

pip install srmech                  # core (no jsonschema, no network adapters)
pip install srmech[validation]      # adds jsonschema for strict data-block validation
pip install srmech[collectors]      # adds requests + beautifulsoup4 for fetched adapters
pip install srmech[dev]             # everything

License

GPL-3.0-or-later. See LICENSE.