yoshuawuyts/components

[component] search-index — BM25/keyword retrieval

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#5 opened on May 1, 2026

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help wanted

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Description

Goal

Component to build and query fast, pure keyword search index (BM25/TF-IDF/inverted index) — useful for retrieval steps of RAG pipelines. State is just index bytes; host controls persistence.

Scope/Features

  • Build index: documents in, index bytes out
  • Query index: index bytes in, text query in, top-K hits out
  • Stateless, pure; no file/network access

Rough WIT shape

  • build(docs: list<doc>) -> list<u8>
  • query(index: list<u8>, q: string, k: u32) -> list<hit>
  • Doc/hit typedecls.

Candidate crates

Labels

  • help wanted

Suggest discussing v1 (pure/byte model) and possible evolution toward incremental/resource-based interface for scaling.

Contributor guide

Research direction
Evaluate tantivy and noodle crates for building a pure BM25/inverted index component in Rust. Focus on stateless byte based API design.
Tech stack
rust
Domain
backendsearch
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Mostly clear
Prerequisites
Rust
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60