install

Additional install commands

macOS

Homebrewverified · 100%

brew install classifier

local Homebrew formula metadata

overview

Package summary

Text classification with Bayesian, LSI, Logistic Regression, and kNN

Project links

Commands and aliases

classifier

history

Project history and usage

Ruby Classifier is a Ruby text-classification library and CLI providing Bayesian classification, LSI, logistic regression, k-nearest neighbors, TF-IDF vectorization, streaming training, persistence, and native LSI acceleration.

Project history

The GitHub repository was created in 2008. The gemspec and README describe it as a Ruby library for text classification with Naive Bayes, LSI, logistic regression, kNN, TF-IDF, pluggable persistence, and a native C extension.

The modern 2.x series refreshed the package in late 2025 and 2026, adding current documentation at rubyclassifier.com and a CLI-oriented Homebrew distribution path.

Adoption history

RubyGems reported 1,162,163 total downloads for the classifier gem, making the Ruby package history much larger than the Homebrew CLI footprint. Homebrew packages version 2.6.0 and reported 131 installs over the prior 365 days.

How it is used

As a Ruby gem, users require classifier classes for Bayes, LSI, logistic regression, kNN, and TF-IDF workflows. As a CLI, users can classify text with pretrained models, list models, train categories from files, and classify new strings.

Why package nerds care

classifier is notable because an old Ruby ML/text-processing gem now spans RubyGems, generated API docs, a dedicated docs site, native extension compilation, and a Homebrew CLI package.

Timeline

2008: GitHub repository created.
2024: v1.4.4 released in the 1.x line.
2025: v2.0.0 released.
2026: v2.6.0 released and packaged by Homebrew as stable.

Related projects

The package relates to RubyGems and RubyDoc as its primary Ruby distribution and API documentation surfaces.
Its README positions it against older forks by emphasizing additional algorithms, incremental LSI, streaming, persistence, and native acceleration.

Sources

security posture

No protected-tool coverage found yet

No matching local secret-handling manifest was found for classifier. Nucleus package metadata is still published here so future coverage has a stable package URL.

Install behavior

No Homebrew bottle metadata was recorded.

Recommended review

Before unattended agent use, check whether the tool reads plaintext credentials, writes remote state, publishes artifacts, or shells out to plugins.

executables

Installed executables

Command	Kind	Exposure	Note
`classifier`	executable	indexed executable	Discovered from the local executable index.

freshness

Version and freshness

These signals separate page generation age, package-manager activity, and upstream release comparison. Version lag is warned only when an evidence URL and comparable versions are present.

page generated2026-08-03

manager version2.6.0

manager updated2026-06-26

local dataunknown

upstreamnot available

latest detectednot detected

okNo freshness warnings were generated.

install metadata

Package metadata

Package key	brew:classifier
Version	2.6.0
Package manager	Homebrew
Homepage	https://rubyclassifier.com
Repository	https://github.com/cardmagic/classifier
Last updated	2026-06-26T00:37:48Z
Pulse	updated
Bottle	not recorded
Service	none declared

package graph

Links come from deterministic package relationships, av.db category and tag curation, ecosystem matches, and package hub membership.

source trail

Generated from repository data

This page is generated by av-web from the private package SQLite artifact built by scripts/generate-pkg-sqlite.py.

Combined YAML source

View the package source record on GitHub.

combined/classifier.yml

Used sources

Geiger risk classifier
cross-ecosystem install command graph
curated package history
pkg.so package database
pkgdb category and tag curation

Install classifier with Homebrew