Altimate Code is an open-source agentic data engineering harness built on top of dbt tooling, adding schema lineage and

Why we built this:

Pradnesh and I have been building tooling for data engineers for three years: dbt Power User and Datamates vscode extensions with combined 750k+ installs, running against real Fortune 500 data estates. The pattern we kept seeing: general-purpose agents can write SQL, but they have no model of what the SQL does. No lineage. No schema context. No understanding of what's in a dbt manifest. That's not a prompt problem; it's a missing tool layer problem.

The numbers make it concrete: 27–33% of AI-generated SQL references tables that don't exist. 78% of errors are silent wrong joins, queries that compile, run, and return confidently incorrect data. One team got a $5k bill from a single Cortex AI query their resource monitors never caught. This isn't a model quality problem. It's a missing harness problem, and we proved it.

Claude Code and Cursor are genuinely good for software engineering. But when you point them at a data stack, they hallucinate column names, ignore partition keys, and have no concept of data contracts or quality rules in your models. From building tooling against real data estates, we knew exactly what was missing at the tool level.

We forked from OpenCode for the agentic scaffolding. What we added is the entire data layer: compiled Rust engines, purpose-built skills, and the harness that