> ## Documentation Index
> Fetch the complete documentation index at: https://vaquill.ai/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Changelog

> Updates and additions to the Vaquill Developer API

Updates to the Vaquill Developer API: new endpoints, new corpora, and behavior changes.
For live coverage counts, call [`GET /statutes/coverage`](/docs/api-guide/concepts/jurisdictions).

<Update label="2026-07-18" description="Regulations, coverage discovery, and pagination">
  ## Regulations, Federal Register, and agency guidance are now queryable

  Three new `corpusType` tokens open up corpora that were already in the corpus but not
  filterable:

  * `REGULATION`: state administrative regulations (176K+ rules across 12 states).
  * `FEDERAL_REGISTER`: Federal Register agency rules, final and proposed (100K+ documents).
  * `AGENCY_GUIDANCE`: agency guidance, including SSA rulings and IRS notices, revenue
    rulings, and procedures.

  Scope a search to any of them with the `corpusType` filter (pair `REGULATION` with a
  `state`). See [Corpus Types](/docs/api-guide/concepts/corpus-types).

  ## New endpoint: GET /statutes/coverage

  A self-describing coverage matrix. It returns a legend of every `corpusType`
  token (its meaning and whether it is federal or state scoped) plus, for each
  jurisdiction, the per-corpusType counts. Call it to learn exactly what is queryable
  where, then pass a token as `corpusType`. See [Jurisdictions and State Codes](/docs/api-guide/concepts/jurisdictions)
  and the [coverage monitoring recipe](/docs/api-guide/recipes/coverage-monitoring).

  ## GET /statutes/states now returns a per-corpusType breakdown

  Each jurisdiction row now includes a `corpora` object, for example
  `{"STATE": 176778, "REGULATION": 51142, "STATE_CONSTITUTION": 179}`, so you can see
  which corpora a jurisdiction has without a separate call.

  ## Pagination on POST /statutes/search

  Search now accepts an `offset` parameter (0-40) alongside `limit`, and the response
  includes `offset` and a `hasMore` flag so you can page through results. `total` is the
  count returned on the current page. See [Pagination](/docs/api-guide/pagination).

  ## Fix: STATE\_RULES now returns results

  The `STATE_RULES` (state court rules) corpus is now correctly served. Court rules are
  available for a handful of states, discoverable via `/statutes/coverage`.

  ## New documentation

  A full developer guide: [Quickstart](/docs/api-guide/quickstart), [Core Concepts](/docs/api-guide/concepts/corpus-types),
  [Pagination](/docs/api-guide/pagination), [Rate Limits](/docs/api-guide/rate-limits),
  [Best Practices](/docs/api-guide/best-practices),
  a [Grounding LLMs](/docs/api-guide/grounding-llms) guide, eight [Recipes](/docs/api-guide/recipes/rag-grounding),
  and a [Use Cases](/docs/api-guide/use-cases) catalog.
</Update>