XZBT-NGN/test-fixtures/PROVENANCE.md

Reference fixture provenance

The owner selected the abacusai set on 2026-09-13. The source is G:/.vibe/SciFi-XZBT/exhibit-test/abacusai/reference-exhibits/. Only the three exhibit directories, shared dependencies, and upstream README were copied. The external source is unchanged.

These files are NGN test fixtures, not product code. Their upstream README describes upstream verification and is not evidence of NGN verification.

Local compatibility corrections:

• Eight read-only descriptors used kind: telemetry, which is not one of Contract 5.2's four kinds. They now use kind: state with their existing value types; IDs and backing readings are unchanged.
• Planetarium's action argument metadata was named args; it is now named arguments under the owner's 5.2 clarification.
• The shared fixture invoke path now enforces declared argument types, required fields, allowed keys, enums, and numeric/string constraints.
• Planetarium's magnitude reader and native dispatch still used the old camelCase ID. They now match its existing canonical sky.magnitude-limit descriptor, fixing a null snapshot value and failed native writes.
• Final Step 5 closure: Haunted House's haunt-level reader now clamps to 0–1 and rounds to integer hundredths, matching its unchanged 0.01 descriptor step. The internal drifting simulation and Manifest behavior remain continuous; snapshots and mutation events share this normalized reader. Previously the reader rounded to thousandths and could report off-step values.

NGN has no fixture-specific target logic. These corrections apply only to the local fixture copies. No upstream fixes or independent conformance certification are claimed.