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GitLab's Signals Engineering team automated post-incident detection gap analysis using the GitLab Duo Agent Platform with two AI agents.
•Detection gap analysis requires mapping attacker actions from incident timelines to missed detection opportunities, a process that is time-consuming and inconsistent when done manually.
•GitLab Duo Agent Platform supports two paths: using a pre-built Security Analyst Agent or building a custom agent with a name, description, and system prompt.
•The custom Detection Engineering Assistant uses a detailed 1,870-word system prompt encoding team-specific SIEM context, log sources, detection philosophy, and MITRE ATT&CK mapping requirements.
•The agent reads closed incident issues and outputs structured gap findings including ATT&CK technique IDs, missed detection descriptions, relevant log sources, and recommended detection approaches.
•Human engineers review the agent's output as a first draft before converting findings into engineering backlog item
This summary was automatically generated by AI based on the original article and may not be fully accurate.
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