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Jnkn

Catch cross-domain breaking changes before they reach production.

Why jnkn?

  • The 3am Page

    You renamed a variable in Terraform. CI passed. Code review approved. Deploy went smooth. Then your app crashes at 3am because Python still expects the old name. Every team has this story.

  • It Gets Worse

    Your data engineer updates a dbt model, renaming user_id to customer_id. dbt tests pass. But downstream, three Airflow DAGs, a Spark job, and your ML pipeline all expect user_id. You find out when dashboards go blank Monday morning.

  • Junkan Catches It

    Junkan builds a dependency graph across your entire stack. Before you merge, you see: "This change impacts 4 Python files, 2 Terraform outputs, and 1 Kubernetes secret." No more surprises.

How It Works

graph LR
    subgraph Parse
        PY[Python] --> G[Graph]
        TF[Terraform] --> G
        K8[Kubernetes] --> G
    end

    subgraph Stitch
        G --> M{Token<br/>Matching}
        M --> L[Cross-Domain<br/>Links]
    end

    subgraph Analyze
        L --> B[Blast Radius]
        B --> PR[PR Comment]
    end
  1. Parse your codebase into a dependency graph
  2. Stitch cross-domain links using token matching
  3. Analyze blast radius for any change

Quick Start

  • 1. Install

    pip install jnkn

  • 2. Scan

    jnkn init
jnkn scan

  • 3. Analyze

    jnkn blast env:DATABASE_URL

Features

  • 5-Minute Setup

    Install and scan your first project in minutes. No configuration required.

    Quickstart

  • Understand Impact

    See what breaks when you change infrastructure or code. Traverse dependencies across domains.

    Blast Radius

  • CI/CD Ready

    Block risky PRs automatically with GitHub Actions. Get impact analysis on every pull request.

    CI Integration

  • Highly Configurable

    Tune confidence thresholds and suppress false positives. Make it work for your codebase.

    Configuration

Supported Stacks

Language/Tool Patterns Detected
Python os.getenv, Pydantic Settings, Click/Typer, django-environ
Terraform Resources, variables, outputs, data sources
Kubernetes ConfigMaps, Secrets, environment variables
dbt ref(), source(), var()
JavaScript process.env, dotenv

Get Started