FeatureSeal v0.1.0

FeatureSeal v0.1.0 is the first portfolio-grade release of a deterministic point-in-time feature-join conformance lab.

Highlights

• bounded strict JSON snapshot contract;
• indexed event-time and availability-time analyzer;
• six deterministic primary mismatch reasons;
• independent parameterized SQLite verifier;
• canonical snapshot, 35-entry ledger, and complete receipt digests;
• zero third-party runtime dependencies;
• offline analyze, verify, inspect, and HTML report CLI;
• 73 tests, 97.51% line coverage, strict mypy/Ruff;
• clean-wheel validation on CPython 3.11.15 through 3.14.6;
• real desktop/mobile/CLI screenshots, SVG diagrams, and GIF;
• source-bound, digest-pinned, networkless Chromium evidence generation;
• CodeQL, Dependabot, private vulnerability reporting, and protected main.

Reference result

The checked-in synthetic scenario contains 4 features, 18 events, 7 observations, and 28 join cells. Independent replay confirms 22 exact matches and 6 findings—one for every primary reason.

Receipt SHA-256:

ead8f767d0f8e8da4cca8a459a878319490eebadc4568d4bd04776c1758ee8ae

• Visual engineering story
• Source-bound evidence manifest
• Real CLI transcript
• Architecture and trust boundaries

Install

python -m venv .venv
. .venv/bin/activate
python -m pip install .

Claim boundary

The reference data is synthetic. Its counts prove deterministic behavior and reproduction for the checked-in fixture; they are not production leakage rates, feature-store certification, upstream truth validation, or model-quality claims.