YYLO

YYLO is an open-source system of work for agentic engineering, coordinating coding agents from engineering intent through validated code while preserving task, session, review, and evaluation evidence. It provides a control plane for action, a Git-native Ledger for task truth, and Benchmark evidence for comparing agent attempts. YYLO is for software organizations using multiple AI tools, including engineering leaders, platform teams, and technical founders.

How it works

YYLO coordinates agent execution without replacing Git or the repository workflow. It defines intent with a task that records one bounded outcome, constraints, and dependencies. It delegates execution to an agent while preserving its worktree, model, and session provenance. Validation uses tests, evidence receipts, and policy-bound review to make acceptance inspectable. Task responses, commits, review evidence, and merge outcomes remain available for future work.

Key capabilities

YYLO includes three open-source layers: the control plane coordinates action, the Ledger preserves task truth in Git, and Benchmark turns attempts into evaluation evidence. The control plane delegates bounded agent execution and integrates accepted changes. The Ledger keeps intent, status, dependencies, responses, archives, and commit evidence durable. Benchmark reviews cases, delegates independent attempts, and evaluates retained outputs with separate checks and judge assessments.

Who it is for

YYLO is for software organizations using multiple AI tools, including engineering leaders, platform teams, developer-productivity teams, and technical founders. It helps teams coordinate agents, preserve shared knowledge, and evaluate outcomes across users, workflows, and AI providers. The platform is designed to become the trusted context layer for people, agents, and business systems. It aims to make AI-assisted work repeatable, visible, and governable.

Pricing and limits

YYLO is open-source and available today, with three working, publicly available products. The current stable versions are YYLO 0.2.11, Ledger 0.4.0, Benchmark 0.2.1, and Skills 2.1.1. Installation is via npm with 'npm install -g @yylo/cli@0.2.11'. The project is in early stages, with future paid team offerings and pricing under validation. The source states that paid capabilities are direction, not current traction.