Original Research — Stahl Systems
104 Failure Modes.
247 Incidents.
19 Project Spaces.
The first bidirectional taxonomy of human-AI collaborative failure.
Empirically derived from 129 structured incidents across 21 Claude project spaces. Covers AI errors (Direction A), human-process errors (Direction B), and 9 cross-project failure patterns.
104
Failure modes catalogued
247+
Qualifying incidents analyzed
103
Direction A — AI errors
1
Direction B — human error
13
CRITICAL-severity incidents
Key Finding
Fabrication represents 13.1% of incidents but accounts for 46% of all CRITICAL severity incidents. When AI fabricates, it tends to be catastrophic. When it makes process or quality errors, they tend to be medium or low severity.