Thriving Thriving Rust RS
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uqa-engine cognica-io/uqa-engine

Embeddable Rust query engine unifying relational, full-text, vector, graph, and probabilistic retrieval under one typed algebra.

HEALTH 96 / Healthy
// solo builder// hidden gem// release machine bayesian-inferencedatabaseembedded-databasefull-text-searchgraph-databaseinformation-retrievalquery-enginequery-optimizationrustsql
05-2026 · today · jaepil
★6 Share View on GitHub ↗

// readme

UQA Engine

UQA Engine is an embeddable database engine that lets one application use a PostgreSQL 18-compatible SQL surface across the behavior covered by its differential suite, full-text search, vector search, graph queries, and ranked retrieval through a shared Rust runtime.

It is designed for applications that need more than a relational table but do not want to assemble a separate database, search server, vector store, and graph engine for every query path.

[!IMPORTANT] Open source with broad application exceptions

UQA Engine uses AGPL-3.0-only as its base license, with FOSS and noncommercial application exceptions. Qualifying open-source applications, including commercial ones, and qualifying personal, educational, academic, or charitable applications may keep their independent code under their own licenses or chosen terms. In practice, separate commercial terms are mainly needed for proprietary commercial products or services that must keep their application or UQA Engine changes closed. UQA Engine and modifications to UQA Engine remain under the AGPL when using the public paths. See the [licensing…

↑ The Undervalued Score +

How much a project earns versus how much attention it actually gets. Above 50 means the work is outrunning its audience. Recomputed nightly from commit velocity, contributor effort, issue resolution, fork utility, release cadence, and project maturity — divided by a logarithmic reach factor.

score  = signal / reach

signal = 0.25·commit_velocity   // commits in last 90 days (cap 30)
       + 0.20·contributor_work  // unique authors × velocity (cap 100)
       + 0.20·issue_resolution  // closed ÷ total issues
       + 0.20·fork_ratio        // forks ÷ stars (proxy for real usage)
       + 0.10·release_cadence   // releases in 90 days (cap 3)
       + age_bonus              // +0 to +0.30 after 6 months
       + homepage_bonus         // +0.05 if homepage is set

reach  = log₁₀(stars + watchers + 10)█
♥ The Health Score +

Is the project alive and maintained right now? A 0–100 pulse recomputed nightly from commit recency, rhythm, how fast issues close, and how quickly PRs get merged.

health = 0.35·recency       // days since last commit (90d decay)
       + 0.25·cadence       // commit rhythm consistency
       + 0.20·issue_health  // closed ÷ total issues
       + 0.20·pr_health     // merged ÷ total PRs█
◷ Health bands +

The colour and label on every card come straight from the health score.

Healthy   80 – 100   active, responsive, regular releases
Stable    60 – 79    maintained, steady, no alarms
Quiet     40 – 59    slowing down — watch this one
At Risk    0 – 39    going dark · candidate for rescue█
// Tags — what each label means +

Tags are independent behavioral signals computed nightly. A project can hold multiple at once. They drive the home page sections.

solo_builder      one person holds > 80% of commits (last 180d)
needs_contributors has open "help wanted" or "good first issue" labels
hidden_gem        < 100 stars · active in last 3 months · documented
legacy_hero       repo > 5 years old · committed this year
fork_magnet       forks/stars > 0.5 · used as template or dependency
release_machine   5+ releases in the last 90 days
under_pressure    > 10 open issues · ≤ 2 contributors · health ≥ 60
community_watch   watchers > stars · devs tracking before the public
community_hub     GitHub Discussions enabled · > 20 discussions
funded            maintainer has active funding channel█
★ Why rank against stars at all? +

Stars are an outcome, not effort. A project with 8 stars and daily commits is doing more interesting work than one coasting on 8k. We measure the building, then divide by the attention already received — so the genuinely undervalued rise to the top.

// stars   = lagging indicator
// commits = leading indicator
// we rank by the leading one█