Built by Exmergo · AI Agents for Your Data Stack.
Install (Claude Code)
Run these commands inside Claude Code one at a time
/plugin marketplace add exmergo/exmergo-agent-plugins
/plugin install dex@exmergo
Update later with /plugin marketplace update exmergo. The skills appear as
/dex:explore, /dex:transform, and /dex:maintain and auto-trigger on matching
intent.
Install (Any Agent)
Run this command in your terminal
npx skills install exmergo/dex
dex is analytics engineering for Claude Code and any agent: data warehouse
exploration, dbt transformation and semantic modeling, and schema-drift
maintenance on dbt. Point it at your warehouse (or a local DuckDB file) and your
dbt project; it learns the landscape, writes and refactors your dbt transformations
and semantic models, and tells you what to fix when anything drifts. The dbt
project is the source of truth; every change is a reviewable diff. Read-only
against your data.
It closes the gap a general coding agent still has: agents re-learn the schema
each session, have no strategy for thousands of tables, are blind to warehouse
cost, will pull sensitive data into context, do not treat a dbt project as a
first-class object, and have no concept of a semantic model to keep coherent over
time. dex owns exactly that loop.
The loop
Explore. Transform. Maintain. (ETM)
- Explore an unfamiliar warehouse: rank what matters, profile selectively, infer and verify joins, answer ad-hoc questions with guarded SQL probes behind a PII-aware query firewall, persist a draft map. Fully read-only.
- Transform the dbt project: author dbt models (staging to marts) with tests and docs, and the semantic layer on top (entities, dimensions, measures, metrics) as dbt semantic models (MetricFlow YAML), with a free Viz preview. Validated against a dev target, cost-guarded.
- Maintain the project as it drifts: diff the warehouse and dbt against the last snapshot, surface schema, volume, grain, and definition drift ranked by blast radius, and propose edits.
Benchmark
On ADE-bench (75 analytics-engineering tasks: fix, build, and extend dbt
projects on DuckDB), dex reaches 76% task resolution with Claude Sonnet 5,
at 2.5x lower cost than Claude Fable 5.
With dex, accuracy clusters tightly across models (72-76%) while cost does not,
so you can run an inexpensive model and still get top-tier results. Full
methodology, per-model cost, and the raw results.json for every run are in the
benchmark README.
On benchmarks
We publish these to be transparent, not to overclaim. A task-resolution score measures whether tests pass; it does not measure what matters most in practice: the experience of the human engineer working with the agent. Trust in a diff, clarity of the proposed change, cost surfaced before spend, and sensitive data kept out of context never show up in a pass rate. We optimize for that experience first and treat the benchmark as a floor, not the goal.
Connectors
- Cloud warehouse: Snowflake, BigQuery.
- Embedded analytical: DuckDB.
- Operational database: Postgres.
Credentials are discovered, never asked for: BigQuery through Application
Default Credentials (gcloud auth application-default login), Snowflake
through connections.toml, SNOWFLAKE_* env, or a dbt profile, Postgres
through pg_service.conf, DATABASE_URL, the PG* environment, or a dbt
profile. Every scan is estimated and confirmed before it spends, capped
server-side (maximum_bytes_billed on BigQuery; a per-statement statement
timeout on Snowflake and Postgres, whose budgets are warehouse-seconds with
credits alongside and database-seconds respectively), and recorded in a local
spend ledger.
Upcoming Connectors
- Cloud warehouse: Databricks, AWS Redshift, Microsoft Fabric
The exmergo-dex-core package
dex also bundles the exmergo-dex-core Python package.
This is the reusable and agent-friendly package that contains all the core
explore, transform, and maintain logic. This also holds connectors and the
write logic for .dex/ which stores cache, snapshots, and query billing logs.
You can install it yourself in your projects:
pip install exmergo-dex-core
or
More info in the package's README.md
Agent References
- Cross-agent contract:
AGENTS.md. - References (connectors, the contract, the canonical model, evaluation):
references/.
Contributing
See CONTRIBUTING.md for local setup, the Ruff lint and
format workflow, and the pre-commit hook. Every pull request into main must
pass the Lint workflow and CI before it can merge.
Community
Connect with the Analytics Engineering Community (Data Engineers welcome as well!) and discover how Exmergo brings AI Agents to Your Data Stack.
License
Apache-2.0.