ragnar 0.2.1

• ragnar_register_tool_retrieve() now registers a tool that will not return
  previously returned chunks, enabling the LLM to perform deeper searches of
  a ragnar store with repeated tool calls (#106).

• Updates for ellmer v0.3.0 and duckdb v1.3.1 (#99)

• Improved docs and error message in ragnar_store_insert() (@mattwarkentin, #88)

• ragnar_find_links() can now parse sitemap.xml files. It also gains a
  validate argument, allowing for sending a HEAD request to each link and
  filtering out broken links (#83).

• ragnar_inspector() now renders all urls as clickable links in the chunk markdown
  viewer, even if url is not a formal markdown link (#82).

• Before running examples and tests we now check if ragnar can load DuckDB extensions.
  This fixes issues in environments where DuckDB pre-built binaries for extensions are not
  compatible with the installed DuckDB version (#94).

• Added embed_lm_studio to use LMStudio as an embedding provider (#100).

• Fixed a bug causing ragnar_retrieve() to fail when documents were inserted without
  an origin (#102).

• We now suppress a "Couldn't find ffmpeg or avconv" warning when importing markitdown when
  using read_as_markdown(). The warning would only be relevant for users doing
  audio transcription (#103).

• Added embed_google_gemini to use Google Gemini API as an embedding provider (#105).

ragnar 0.2.0

• ragnar_store_create() gains a new argument: version, with default 2.
  Store version 2 adds support for chunk deoverlapping on retrieval and automatic chunk augmentation with headings.
  To support these features, the internal schema and ingestion requirements are different.
  See markdown_chunk() and new S7 classes MarkdownDocument and MarkdownDocumentChunks.
  Backwards compatibility is maintained with version = 1. (#58, #39, #36)

• ragnar_store_create() now supports Date and POSIXct classes supplied to extra_cols.

• ragnar_store_create() now supports remote MotherDuck Databases specified with md:<dbname> as
  the location argument. (#50)

• ragnar_retrieve() and friends gain a filter argument, adding support for efficiently
  filtering retrieval results.

• ragnar_retrieve_bm25() gains arguments b, k, and conjunctive (#56).

• ragnar_retrieve_vss() gains argument query_vector, supporting workflows that preprocess the query string before embedding.

• ragnar_retrieve_vss() set of valid method choices have been updated to a narrower set to ensure that an HNSW index scan is used.

• Passing a tbl(store) to ragnar_retrieve() is deprecated.

• New chunker markdown_chunk() with support for chunk heading context generation,
  semantic boundary selection, overlapping chunks, document segmentation, and more. (#56)

• New function embed_google_vertex() (@dfalbel, #49)

• New function embed_databricks() (@atheriel, #45)

• New function ragnar_chunks_view() for quickly previewing chunks (#42)

• ragnar_register_tool_retrieve() gains optional name and title arguments
  to allow for more descriptive tool registration. These values can also be set
  in ragnar_store_create() (#43).

• ragnar_read() and read_as_markdown() now accept paths
  that begin with ~ (@topepo, #46, #48).

• Changes to read_as_markdown() HTML conversion (#40, #51):

  • New arguments html_extract_selectors and html_zap_selectors provide a flexible way to
    exclude some html page elements from being included in the converted markdown.
  • code blocks now include the language, if available.
  • Fixed handling of nested code fences in markdown output.

ragnar 0.1.0

• Initial CRAN submission.