Layer 2 on Tech Foundations

Stack 21 Fault Inventory

Mon, 01 Jan 0001 00:00:00 +0000

Layer 2 Fault Inventory

This file defines the canonical atomic fault modes for Layer 2.

Layer 2 fault modes are recurring behavioral failure patterns that arise downstream of Layer 1A mechanisms, Layer 1B learned behavioral features, and Layer 1C AI-system-level causal features.

Stack 23 Fault Family Index

Mon, 01 Jan 0001 00:00:00 +0000

Layer 2 – Fault Family Index

Canonical atomic fault definitions live in stack-21-fault-inventory.md.

Purpose

This document defines broad, non-exclusive fault families for Layer 2.

Stack 24 Classification Views

Mon, 01 Jan 0001 00:00:00 +0000

Layer 2 – Classification Views

View 4 – Evaluation-Method View

Purpose

The Evaluation-Method View classifies Layer 2 fault modes by the kind of evaluation needed to detect, measure, reproduce, or compare them.

Stack 25 Evaluation Mapping

Mon, 01 Jan 0001 00:00:00 +0000

Layer 2 Evaluation Mapping

Purpose

This document maps Layer 2 feature-derived fault modes to evaluation methods.

Layer 2 fault modes describe recurring behavioral failure patterns that arise downstream of Layer 1A mechanisms, Layer 1B learned or behavioral LLM features, and Layer 1C AI-system-level causal features. This document answers a different question:

Stack 26 Evaluation Method Reference

Mon, 01 Jan 0001 00:00:00 +0000

Evaluation Method Reference

Purpose

The Evaluation-Method View classifies Layer 2 fault modes by the evaluation methods needed to detect, measure, compare, or gate them.

Stack 27 Worked Examples

Mon, 01 Jan 0001 00:00:00 +0000

Layer 2 – Worked Examples

This document shows how to apply the Layer 2 fault inventory to concrete AI-system failures.