alguidelines.dev

What It Is

AL Guidelines (alguidelines.dev) is a documentation site for design patterns and best practices in Microsoft Dynamics 365 Business Central AL development. The site explicitly states that it is community-run and endorsed by Microsoft. Its goal is to consolidate shared knowledge from the Business Central / NAV community around AL development, especially reusable design patterns.

Core Capabilities

Its core offering is not a compiler or IDE, but a development standards knowledge base. The content covers design patterns such as API Register, Command Queue, Delegate API Operation, Error Handling, Event Bridge, Façade, No. Series, and Template Method. It also includes best practices for API Page / Query, variable naming, indentation, line breaks for binary operators, SetLoadFields, Subscriber Codeunits, Custom Telemetry, and more. The site also retains a large NAV Patterns Archive and C/AL Coding Guidelines, making it useful for teams maintaining legacy NAV/C/AL projects. Newer sections include Agentic Coding, Vibe Coding Rules for AL, and MCP Servers, indicating that it is incorporating AI-assisted development workflows—such as GitHub Copilot, Claude, Cursor, and MCP—into the AL ecosystem.

Pricing and Openness

The collected content does not show any commercial pricing or subscription plans, so it appears to be a publicly available free documentation site. The pages provide links to GitHub, PRs, Issues, Edit this page, and View page source, and there is also a Discord community, giving it a strong collaborative nature. However, the specific open-source license is not shown in the text.

Pros and Cons

Its strengths are its strong vertical focus, broad content structure, backing from the Business Central community, and Microsoft support. It is well suited as a source for team coding standards, code review checklists, and onboarding materials for new developers. For a field like AL, where resources are relatively scattered, having design patterns organized in one place is particularly valuable. Its drawback is that it is not an integrated tool that directly improves development efficiency. Some content is still incomplete—for example, Development Best Practices shows “more text coming soon.” The documentation is also mainly in English, which may create a barrier for Chinese-speaking teams.

Who It’s For and Access in China

It is suitable for Business Central AL developers, NAV maintenance teams, ERP implementation partners, technical leads, and teams that want to standardize the output of AI coding assistants. It is not suitable for users outside the Microsoft ERP technology stack or those looking for a general-purpose code generation platform. The collected text provides no evidence regarding access from China, so this is marked as unknown.