openblame 0.1.7

Local-first AI investigation CLI for OpenMetadata data pipelines.

OpenBlame

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OpenBlame is a local-first AI investigation CLI for data pipelines running on OpenMetadata. Point it to a table, and it will trace lineage, inspect recent quality failures, parse schema-changes, surface governance gaps, and draft a root-cause narrative.

The reasoning layer runs entirely on your local Ollama models, ensuring your metadata stays inside your environment.

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Features

• Autonomous Investigation: ReAct-style agent loop that plans and executes metadata research.
• Lineage & Blast Radius: Automatic upstream/downstream analysis to find affected entities.
• Schema Drift: Instant diffing of column changes, type updates, and renames.
• Governance Aware: Surfaces missing owners, tiers, and domain gaps as operational risks.
• Local-First AI: Powered by Ollama (qwen2.5, llama3, etc.). No external API keys needed for reasoning.
• MCP Ready: Built-in Model Context Protocol server to integrate with AI IDEs like Cursor and Claude Desktop.

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Quick Start

1. Install

pip install openblame

2. Configure (CLI-only)

No need to manually edit files. Just run the interactive setup:

openblame configure

It will help you set your OpenMetadata Host, Token, and even auto-detect your installed Ollama models.

3. Investigate

openblame investigate "ecommerce.analytics.customer_churn"

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CLI Commands

investigate

The core command. Runs the full AI reasoning loop.

openblame investigate <table_fqn> [OPTIONS]

Options:
  --depth INTEGER     Lineage depth (default: 3)
  --days INTEGER      Lookback days for changes (default: 7)
  --output PATH       Save report to markdown file
  --model TEXT        Override default Ollama model
  --host TEXT         Override OpenMetadata host
  --token TEXT        Override OpenMetadata JWT token

configure

Interactive setup for your environment. Sets up .env for you.

openblame configure

list-models

Show all models available in your local Ollama instance and see which one is active.

openblame list-models

diff

Check for schema changes in a table without running the full agent.

openblame diff <table_fqn> --days 7

lineage

Visualize upstream and downstream lineage as a tree.

openblame lineage <table_fqn> --depth 3

mcp-server

Start the MCP server for integration with Claude/Cursor.

openblame mcp-server

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MCP Integration (Cursor / Claude)

Add OpenBlame to your claude_desktop_config.json:

{
  "mcpServers": {
    "openblame": {
      "command": "openblame",
      "args": ["mcp-server"]
    }
  }
}

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Development

# Clone and install
git clone https://github.com/manasdutta04/openblame
cd openblame
pip install -e ".[dev]"

# Run Tests (Windows)
.\test.ps1

# Run Tests (Linux/Mac)
make test

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License

OpenBlame is released under the MIT License. See LICENSE for details.

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Contributing

We welcome contributions! See CONTRIBUTING.md for guidelines. Check out our Code of Conduct and Security Policy.

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Note: For users migrating from DataGhost, we provide DataGhostAgent and DataGhostResult aliases in openblame.agent for backward compatibility.