jwlai-cloud/Downstream Impact Guardian

On every dbt PR: detects breaking schema/logic/semantic changes, assesses real cross-system blast radius via DataHub lineage, proposes a Data Contract back into DataHub, and posts a PR comment with mergeable compatibility code. Runs entirely on the Action runner — no hosting.

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Trust Signals

Scorecard Score: not yet scored
Maintenance Recency: Stale
License: None

Inputs

name	description	required	default
dbt-project-dir	Path to the dbt project in your repo	yes	—
prod-manifest	Last-known-production manifest.json. Default: <dbt-project-dir>/prod_state/manifest.json	—	""
glossary-file	DataHub business glossary yml tracked in your repo. Default: <dbt-project-dir>/datahub/business_glossary.yml	—	""
pr-number	Pull request number	—	${{ github.event.pull_request.number }}
datahub-url	DataHub GMS URL. Empty = offline fixture mode.	—	""
datahub-token	DataHub access token (required if GMS auth is enabled)	—	""
google-api-key	Gemini API key for the ADK narrative agent (optional)	—	""
narrative-model	Narrative LLM. Default gemini-flash-latest; any LiteLLM id works (e.g. openai/gpt-4o-mini, or openai/<model> against an OpenAI-compatible endpoint via openai-base-url).	—	""
openai-api-key	OpenAI-compatible API key (alternative to google-api-key)	—	""
openai-base-url	OpenAI-compatible base URL (e.g. Qwen/DashScope compat mode)	—	""
slack-webhook-url	Slack incoming webhook — one summary message on HIGH/CRITICAL	—	""
github-token	Token used to post the PR comment	—	${{ github.token }}
dbt-adapter	dbt adapter package to install	—	dbt-bigquery
datahub-platform	Warehouse platform in your DataHub urns	—	bigquery
warehouse-project	Warehouse project/database in your DataHub urns (GCP_PROJECT)	—	""
warehouse-dataset	Warehouse dataset/schema in your DataHub urns (BQ_DATASET)	—	""
output-dir	Where generated artifacts are written	—	.dig_output
strict	Fail the check on HIGH/CRITICAL severity ("true"/"false")	—	false

Outputs

no outputs