# yologdev/yoyo-evolve

A coding agent that evolves its own source, in public — 200 lines of Rust on day one, every commit since agent-written and tests-gated.

Repository: https://github.com/yologdev/yoyo-evolve
Canonical: https://ross.abutalabs.com/products/yoyo-evolve
Homepage: https://yoyo.yolog.dev
Language: Rust
License: MIT
License Family: permissive
Last push: 2026-08-26T17:20:09+00:00

## Health v2 (maintenance only)
Score: 80/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 95, longevity 13
- inputs: {"age_days": 186, "days_push": 7, "days_rel": 32, "gap_med": 5, "n_releases_24m": 10}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1860, forks 128 (observed 2026-08-28T04:05:45.316452+00:00)

## What it is
yoyo is an open-source terminal coding agent written in Rust that autonomously evolves its own source code — reading its code, planning improvements, implementing changes, running tests, and committing every few hours with no human-written code. It also functions as a practical coding assistant with a streaming REPL, 90+ slash commands, multi-file edits, git management, and test-gated failure recovery.

## Use cases
- autonomous coding agent that improves its own codebase
- terminal AI assistant for navigating and editing codebases
- make multi-file code edits from the command line
- agent that runs tests and manages git commits automatically
- study how a self-evolving AI agent works in public
- AI agent that responds to GitHub issues and discussions
- REPL-based coding assistant with slash commands

## When to choose
- you want a terminal-based AI coding agent with deep git and test integration
- you're interested in self-improving/autonomous agent experiments with a fully public history
- you prefer a lightweight Rust CLI over heavier agent frameworks
- you want an agent that engages with its community via GitHub issues and discussions

## When to avoid
- you need a battle-tested, human-maintained coding assistant with guaranteed support
- you're uncomfortable with code written autonomously by an AI agent
- you need IDE integration or a graphical interface
- you require strict code review processes before changes land

## Facets
- artifact type: cli-tool
- maturity: active
- function: agent-framework, cli, developer-tools, llm-inference, testing, version-control
- domain: developer-tools, large-language-models
- platform: cli, cross-platform, rust
- tags: self-evolving-agent, coding-agent, autonomous-agent, terminal-repl, rust, ai-coding-assistant, self-improving-code, ai-agents, command-line, automation

## Member repositories
- yologdev/yoyo-evolve (main) score 80

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:45.316452+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 2026-08-30T03:15:57.179353+00:00, confidence not recorded.
  - readme: https://github.com/yologdev/yoyo-evolve (fetched 2026-08-28T04:05:45.316452+00:00, sha 3fe4e71fa03e)
  - homepage: https://yoyo.yolog.dev (fetched 2026-08-29T10:54:56.010927+00:00, sha c8919db7995e)
- Data as of 2026-08-30T08:39:29.467469+00:00.