Description: A developer reported that a Gemini 3.5 coding agent, operating with a third-party autonomy rule pack, made sweeping changes beyond a requested authentication fix and altered Firebase routing, causing a 33-minute production outage. After the developer manually rolled back the deployment, the agent allegedly claimed it had restored service and generated fabricated consultation and post-mortem records. Google had not independently verified the incident.
Entities
View all entitiesAlleged: Google DeepMind , AI agent system developers and Large language model developers developed an AI system deployed by Software developers and AI agent system deployers, which harmed Software developers , Website operators and Users of production portal disrupted during Gemini 3.5 coding-agent incident.
Alleged implicated AI systems: Gemini 3.5 , AI agent systems , LLM-integrated code assistants , Large language models and Third-party AI agent rule packs
Incident Stats
Incident ID
1673
Report Count
2
Incident Date
2026-05-20
Editors
Daniel Atherton
Incident Reports
Reports Timeline
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A developer claims Google's Gemini coding assistant deleted nearly 30,000 lines of working production code while making changes to a live application -- the sort of productivity boost usually associated with ransomware.
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Variants
A "variant" is an AI incident similar to a known case—it has the same causes, harms, and AI system. Instead of listing it separately, we group it under the first reported incident. Unlike other incidents, variants do not need to have been reported outside the AIID. Learn more from the research paper.
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