trustline 0.2.0

Compiler for business invariants across data-product boundaries.

Trustline

Business systems fail at the boundaries. Trustline verifies the boundaries.

Trustline compiles YAML contracts into SQL checks and produces a measurable integrity scorecard. See Why Trustline for the seam problem and compiler model.

Quickstart

pip install trustline
trustline audit --demo

The demo audit exits 1 — seeded failures are intentional. See ACME demo.

Scaffold contracts for your product:

trustline init --preset ml-crm-boundary --non-interactive
trustline validate --contracts ./trustline/contracts

Contributors: clone the repo and run make install-dev. See Getting Started.

When to use Trustline

Use Trustline when you need to verify seams between systems — not to orchestrate pipelines or train models:

Scenario	Init preset
ML scores must land in CRM with expected coverage	ml-crm-boundary
Training and scoring read from different feature tables	cohort-source-parity
Identity funnel retention drops across join stages	funnel-retention
Block merges on invalid contract YAML in CI	trustline validate (no preset)

List presets: trustline init --list-presets. Pattern details: Patterns. Walkthroughs: Use cases.

What Trustline is not

• Not an orchestrator — integrates with Airflow and Dagster; does not replace them
• Not a transform framework — extends dbt; does not replace it
• Not a model training runtime — no training, inference, or feature store
• Not a hosted SaaS — CLI you run in CI or on a schedule
• Not auto-remediation — detects and reports; never auto-fixes

Documentation

Document	Description
Why Trustline	Problem statement and compiler model
Patterns	Boundary failure catalog
Use cases	Common adoption walkthroughs
Stability	Contract and CLI semver policy
Getting Started	Install, quick start, CLI
ACME demo	Bundled fixture and --demo
Overview	Commands, phases, architecture
Contract Spec	YAML schema
Roadmap	Planned versions
Examples	Init presets and templates
Contributing	Development

Development

make check    # format, lint, types, tests, coverage
make test

License

Apache 2.0