View cross-model event history with time range filtering. Returns events sorted newest-first with pagination. Defaults to the last 7 days if no time range is specified.

Import models from external sources into the ledger. Supports inline model dicts, JSON files, or named connectors. Returns counts of models added/skipped and links created.

Deep-dive into a single model — history, metadata, dependencies. Returns owner, type, status, recent events, upstream/downstream dependencies, and group memberships.

Return all tags attached to a model.

Search and filter the model inventory. Supports text search (fuzzy name/purpose match) and structured filters (platform, model_type, owner, status) with pagination.

Register a new model or record an event on an existing model. Use event='registered' to create a new model. Any other event value appends to an existing model's history.

Create or move a named tag to the latest snapshot of a model. Tags are mutable pointers used for release markers, version labels, or "latest-X" references. Calling with the same ``tag_name`` moves the tag forward to the current latest snapshot.

Traverse a model's dependency graph. Walks upstream (models this one depends on) and/or downstream (models that depend on this one). Returns dependency nodes with depth and relationship metadata.