About Vchord & vchord.pgsty.com

Project overview, licensing, upstream attribution, and trademark policy for the PGSTY-maintained Vchord extension suite and documentation site.

Vchord is a PostgreSQL extension suite for scalable vector similarity search and BM25 full-text search, consisting of vchord, vchord_bm25, and pg_tokenizer.

This repository (pgsty/vchord.pgsty.com) and website (https://vchord.pgsty.com/) provide a complete, fast, local-first documentation and technical blog reference for pgsty/vchord, pgsty/vchord_bm25, and pgsty/pg_tokenizer, maintained by PGSTY using the OINK 1.4.0 documentation framework.

Note

pgsty/vchord, pgsty/vchord_bm25, and pgsty/pg_tokenizer are PGSTY-maintained forks of tensorchord/VectorChord, tensorchord/VectorChord-bm25, and tensorchord/pg_tokenizer.rs. See Attribution and Trademark Policy for details.

Documentation Scope

Section	Coverage
`vchord` Docs	Installation, migration from `pgvecto.rs`, `vchordrq` and `vchordg` indexing, MaxSim multi-vector retrieval, range queries, PostgreSQL tuning, external index precomputation, benchmarks, and SQL reference.
`vchord_bm25` & `pg_tokenizer`	Complete documentation for `pgsty/vchord_bm25` (`vchord_bm25`) and `pgsty/pg_tokenizer` (`pg_tokenizer`): Okapi BM25 scoring, Block-WeakAnd Top-K index scans, prefiltering, hybrid search with `vchord`, multilingual text analyzers (`jieba`, `lindera`, Snowball, HuggingFace), and SQL/GUC reference.
Engineering Blog	All 37 engineering deep-dives, benchmark analyses, hybrid search tutorials, and release announcements.

License

Software and documentation licensing for Vchord (pgsty/vchord, pgsty/vchord_bm25, pgsty/pg_tokenizer) and vchord.pgsty.com.

Attribution

Upstream sources, copyright notices, and modification records for vchord.pgsty.com.

Trademark

Statement of independence and nominative trademark usage on vchord.pgsty.com.