Archyl

Archyl helps teams document software architecture using interactive C4 model diagrams. It’s a fit if you want architecture that stays current as the codebase changes, and you don’t want diagrams to drift from your documentation.

• Interactive C4 diagrams for System Context, Containers, Components, and Code levels
• AI discovery from a codebase to help uncover architecture automatically
• Architecture as Code (YAML DSL) so docs and diagrams can be kept in sync
• Imports from existing sources including Git-based AI discovery, ADRs, and markdown documentation
• Drill-down navigation (double-click), plus breadcrumbs and level tabs
• Collaboration features for inviting team members to work together
• API access and integrations via an MCP server and REST API

Archyl organizes diagrams around the C4 model’s four abstraction levels, from system context down to code elements like classes and functions. You can create diagrams by adding systems and drilling down through containers, components, and code. Relationships like “Uses,” “Calls,” “Reads from,” “Writes to,” “Sends to,” and “Receives from” are supported, with room to describe the relationship and add technical details.

If your current challenge is keeping architecture docs aligned with what the code does, Archyl’s approach is to generate or update architecture from repository inputs (AI discovery, ADRs, or existing markdown). Its YAML DSL also targets teams that prefer to treat documentation like versioned artifacts, so diagrams and documentation can stay consistent as your project evolves.