An open-source AI agentic harness for data engineering teams, built on dbt infrastructure. SignalPilot connects to data warehouses, dbt lineage, query history, Slack, Notion, and Jira — giving AI agents the full organisational context to investigate and fix data pipeline issues autonomously. Its governance layer enforces fail-closed, read-only execution, blocking destructive database operations at the architecture level rather than through prompt instructions. The platform runs locally, retains zero data, and is deployable in 60 seconds.