yoshuawuyts/components

[component] embed-index — ANN vector retrieval

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#4 opened on May 1, 2026

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help wanted

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Description

Goal

Component to build/query an ANN index (HNSW, flat, etc) from input vectors; host stores index bytes, queries for nearest neighbors on demand.

Scope/Features

  • Build: vectors in, index bytes out
  • Query: index bytes in, vector in, K hits out
  • No embedding modeling inside component; host provides vectors

Rough WIT shape

  • build(vecs: list<vec>) -> list<u8>
  • query(index: list<u8>, q: list<f32>, k: u32) -> list<hit>
  • Vec/hit types.

Candidate crates

Labels

  • help wanted

Good stepping stone for more advanced resource/stream-based interfaces in future.

Contributor guide

Research direction
Review the candidate crates (hnsw, k nn, annembed) and implement the WIT interface for build and query functions. Start by understanding the existing component structure and then integrate one of the crates for ANN indexing.
Tech stack
rust
Domain
backendapidatabase
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.
Half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
Rust
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
65