CLI that reads a production dbt target and writes the explicit contract YAML blocks so teams can adopt dbt contracts without hand-authoring every column

dbt added model contracts in v1.5 but requires teams to hand-write YAML column definitions for every contracted model. A community feature request for the core to infer contracts from the production schema had 141 reactions and 23 comments. The dbt-labs maintainer explicitly closed it as not_planned in March 2026 stating: 'explicit is better than implicit and having inferred contracts is going to add a lot of headaches. I would like to suggest instead tooling to generate the yaml.' This is a direct invitation to build the missing tool. dbt-contract-gen (1 star, last updated August 2024) exists but is abandoned and does not handle the prod-diffing use case (detecting breaking changes between the prod schema and the declared contract). The product is a CLI that connects to the prod warehouse, reads column types and nullability from information_schema, and writes or diffs the contract YAML, with an option to flag columns that changed since the last run.