@Enreign
FreeBuilding the thing that builds the thing
FreeFree tier
About @Enreign
Enreign (Stanislav Shymanskyi) is a Senior AI Product Manager and agent builder who creates open-source tools focused on autonomous coding agents, codebase understanding, and browser automation. His key projects include Sparks (an autonomous multi-agent system in Rust with ghost agents and self-improvement pipelines), Cartograph (a codebase world model that parses dependencies and git history to map blast radius), Pagerunner (a Chrome automation MCP server that connects AI clients to real browser sessions), and Progressive Estimation (an AI skill for estimating development work). All tools are free and open source, built primarily in Rust with integrations for Claude and other MCP clients.
Key Features
Autonomous multi-agent system (Sparks) with ghost agents (coder, scout), eval harness, and self-build optimizer tournament pipeline
Codebase world model (Cartograph) that parses source into dependency graphs and mines git history for co-change patterns and ownership
Chrome automation MCP server (Pagerunner) connecting Claude or any MCP client to real Chrome sessions via CDP with existing profile, cookies, and history
AI skill for estimating human + agent development work (Progressive Estimation)
Built in Rust leveraging TypeScript, Python, Go, React, Tauri, and Node.js
Integrates with Claude and other MCP-compatible tools
Pros & Cons
Pros
- Open source and free to use
- Built with Rust for performance, safety, and reliability
- Pagerunner leverages real browser sessions without sandboxing or separate profiles
- Seamless integration with Claude and other MCP clients
- Focuses on practical, developer-oriented tools that reduce context switching
- Active development with novel approaches to agent self-improvement
Cons
- Some projects (e.g., Sparks) are private and not publicly available
- Requires knowledge of Rust and the MCP protocol for advanced usage
- Limited documentation and community support beyond the GitHub repos
- Tools are specialized and may not suit general-purpose needs
- Early stage projects may have bugs or incomplete features
Best For
Automating software development tasks with self-improving agentsUnderstanding codebase dependencies and change impact before modifying codeBrowser automation for testing, scraping, and data extraction using existing sessionsEstimating effort for development tasks combining human and agent workBuilding and experimenting with autonomous coding systems and agentic workflows
FAQ
What is Sparks?
Sparks is an autonomous multi-agent system written in Rust that features ghost agents (coder, scout), an eval harness, and a self-build optimizer tournament pipeline. It is designed to explore how coding agents can self-improve.
What is Cartograph?
Cartograph builds a codebase world model by parsing source code into a dependency graph and mining git history for co-change patterns and ownership. It helps understand the blast radius of changes without loading the entire codebase into context.
What is Pagerunner?
Pagerunner is a Chrome automation MCP server that connects Claude or any MCP client to a real Chrome session via the Chrome DevTools Protocol (CDP). It allows navigation, clicking, typing, screenshots, and JavaScript execution using the existing browser profile, cookies, and history.
Who is Enreign?
Enreign is the GitHub username of Stanislav Shymanskyi, a Senior AI Product Manager at Keepit and an agent builder known for creating open-source AI tools like Sparks, Cartograph, Pagerunner, and Progressive Estimation.