# mozilla/mentat

UNMAINTAINED A persistent, relational store inspired by Datomic and DataScript.

Repository: https://github.com/mozilla/mentat
Canonical: https://ross.abutalabs.com/products/mentat
Homepage: https://mozilla.github.io/mentat/
Language: Rust
License: Apache-2.0
License Family: permissive
Archived: true
Last push: 2018-09-10T19:52:42+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 3711, "days_push": 2914, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: archived
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1659, forks 114 (observed 2026-08-28T04:05:18.291223+00:00)

## What it is
Project Mentat is a persistent, embedded relational knowledge base written in Rust, inspired by Datomic and DataScript. It offers a flexible schema model with change listeners, designed for embedding in applications like Firefox and mobile platforms.

## Use cases
- embed a flexible relational store in a Rust application
- model evolving domain schemas without raw SQL
- store structured facts with Datomic-style schema attributes
- build mobile apps needing an embedded knowledge base
- listen to data changes outside the database layer

## When to choose
- you want a Datomic/DataScript-like embedded store in Rust
- you need flexible, evolvable schemas rather than fixed SQL tables
- you're forking and maintaining it yourself

## When to avoid
- you need a maintained, production-supported database
- you need key-value or document storage
- you require active community support or recent updates

## Facets
- artifact type: library
- maturity: abandoned
- function: database, orm
- domain: databases, developer-tools
- platform: rust, cross-platform
- tags: embedded-database, datomic-inspired, knowledge-base, schema-flexible, unmaintained, android, ios

## Member repositories
- mozilla/mentat (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:18.291223+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 2026-08-30T03:44:42.736602+00:00, confidence not recorded.
  - readme: https://github.com/mozilla/mentat (fetched 2026-08-28T04:05:18.291223+00:00, sha f3953aab8e5c)
  - homepage: https://mozilla.github.io/mentat/ (fetched 2026-08-29T11:17:11.688267+00:00, sha 93bd2df222b4)
- Data as of 2026-08-30T08:39:29.467469+00:00.