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Cosmos Dbt Fusion

astronomer/agentsOfficial

If you're running dbt Fusion (not Core) with Astronomer Cosmos on Airflow, this walks you through the Fusion-specific setup that trips people up. It requires Cosmos 1.11 or later and only works with LOCAL execution mode pointing to the Fusion binary. The skill covers binary installation via Dockerfile, ExecutionConfig constraints, and warehouse compatibility (Snowflake, Databricks, BigQuery, Redshift only during preview). Notably clear about what won't work: no async mode, no virtualenv since Fusion is a binary. Includes both DbtDag and DbtTaskGroup patterns with actual code. The validation checklist at the end is practical, especially the note about testing a manual run before declaring victory.

skills.sh installs
925
GitHub stars
459
last updated
Aug 21, 2026
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Install

$ npx -y skills add astronomer/agents --skill cosmos-dbt-fusion --agent claude-code

Installs into .claude/skills of the current project.

Files

Cosmos + dbt Fusion: Implementation Checklist

Execute steps in order. This skill covers Fusion-specific constraints only.

Version note: dbt Fusion support was introduced in Cosmos 1.11.0. Requires Cosmos ≥1.11.

Reference: See reference/cosmos-config.md for ProfileConfig, operator_args, and Airflow 3 compatibility details.

Before starting, confirm: (1) dbt engine = Fusion (not Core → use cosmos-dbt-core), (2) warehouse = Snowflake, Databricks, Bigquery and Redshift only.

Fusion-Specific Constraints

ConstraintDetails
No asyncAIRFLOW_ASYNC not supported
No virtualenvFusion is a binary, not a Python package
Warehouse supportSnowflake, Databricks, Bigquery and Redshift support while in preview

1. Confirm Cosmos Version

CRITICAL: Cosmos 1.11.0 introduced dbt Fusion compatibility.

# Check installed version
pip show astronomer-cosmos

# Install/upgrade if needed
pip install "astronomer-cosmos>=1.11.0"

Validate: pip show astronomer-cosmos reports version ≥ 1.11.0

SKILL.md on GitHub

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Details

Repository
github.com/astronomer/agents
Category
Databases
First seen
May 16, 2026

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