# osohq/oso

Deprecated: See README

Repository: https://github.com/osohq/oso
Canonical: https://ross.abutalabs.com/products/oso
Language: Rust
License: Apache-2.0
License Family: permissive
Last push: 2025-02-26T16:59:39+00:00

## Health v2 (maintenance only)
Score: 26/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 8, release rhythm 8, longevity 100
- inputs: {"age_days": 2312, "days_push": 553, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3491, forks 193 (observed 2026-08-28T04:08:07.231550+00:00)

## What it is
Oso is an embedded authorization framework with a declarative policy language (Polar) for building RBAC, relationships, and collection filtering into applications. It ships libraries for Python, Node.js, Go, Rust, Ruby, and Java, though the open-source library is now deprecated with only critical bug fixes provided.

## Use cases
- add role-based access control to my app
- embed a policy engine for authorization
- filter query results by what a user can see
- write declarative permission rules instead of hardcoded checks
- centralize authorization logic for unit testing

## When to choose
- you already use Oso and need continued support with critical fixes
- you want a batteries-included authorization library with RBAC primitives and a policy language
- you need authorization filtering over collections, not just yes/no checks

## When to avoid
- you are starting a new project - the library is deprecated and future development is elsewhere
- you need a fully managed or actively developed authorization service
- you want long-term community-driven open-source maintenance

## Facets
- artifact type: library
- maturity: maintenance
- function: authorization, security
- domain: security, backend, web-development, developer-tools
- platform: python, go, rust, ruby, jvm, cross-platform
- tags: policy-engine, rbac, access-control, polar-language, deprecated, nodejs

## Member repositories
- osohq/oso (main) score 26

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:07.231550+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T18:35:57.068793+00:00, confidence not recorded.
  - readme: https://github.com/osohq/oso (fetched 2026-08-28T04:08:07.231550+00:00, sha cdbf9ae0966d)
  - registry_crates: https://crates.io/api/v1/crates/oso (fetched 2026-08-29T09:29:59.557549+00:00, sha bae438d5a5c8)
- Data as of 2026-08-30T08:39:29.467469+00:00.