A simple, easy to use implementation of the Okapi BM25 algorithm.

Kura — retrieval engine: BM25 keyword search (+ hybrid fusion), portable and zero-dependency. Pairs with @kurajs/core's vector search.

File-based memory for AI agents — vault, BM25 search, context injection, checkpoints, compaction, Cursor transcript watch/process, postinstall Cursor rules + VS Code folder-open tasks

The fastest BM25 search engine, compiled to WebAssembly

MCP server for ARCA/AFIP web services documentation — hybrid semantic + BM25 search over 50+ official Argentine tax-agency web services.

Subprocess sandboxing, BM25 search, and content chunking for AI-assisted development tools

A highly efficient, isomorphic, full-featured, multilingual text search engine library, providing full-text search, fuzzy matching, phonetic scoring, document indexing and more, with micro JSON state hydration/dehydration in-browser and server-side.

A complete search engine in your browser, server, or edge network with support for full-text, vector, and hybrid search in less than 2kb.

MCP server for fast PDF parsing and BM25 search via MinerU.

ParadeDB full-text search extension pack for Prisma Next.

Local-first semantic search plugin for OpenCode — hybrid vector + BM25 search, AST chunking, smart grep override.

NIST SP 800-53 Rev 5 knowledge-base MCP server (324 controls) with SOC 2 TSC mappings and BM25 search.

Hybrid search for TypeScript/JavaScript projects with AST-aware chunking.

Query Markup Documents - On-device hybrid search for markdown files with BM25, vector search, and LLM reranking

Shared knowledge core - parser, search (BM25), graph builder for CrewX

OKF-compatible memory for AI coding agents — identity, work-ledger and kanban in one plain-markdown bundle, git-native, zero-infra.

Client library for Cloudflare BM25 search API

Local-first memory and hybrid retrieval library for LLM agents with pluggable stores, BM25 plus vector search, and a four-stage memory pipeline.

Host-neutral semantic codebase search with embeddings, symbol discovery, and call-graph tooling

NLP Functions for amplifying negations, managing elisions, creating ngrams, stems, phonetic codes to tokens and more.