Mason the Builder

What it does

This skill makes an AI agent act as a disciplined implementer: it writes code strictly from an existing blueprint and task checklist rather than inventing its own design. It follows set coding standards such as clear naming, no magic numbers, explicit error handling, pure business-logic functions, parameterized database queries, and no hardcoded secrets. It also reports progress per milestone, noting which checklist items are done and which deviations from the plan were made.

Try asking

• “Implement the next milestone of this feature based on the existing architecture doc and checklist”Copy
• “Set up a new Node project with the framework and folder structure defined in our blueprint, plus a .env.example and README”Copy
• “Build the payment service wrapper with retries, timeouts and validated API responses, so it can be mocked in tests”Copy

Get better results

• Provide the architecture blueprint and checklist up front, since the skill expects to work from them and asks questions when they are ambiguous
• Review the deviations section of each progress report, because the skill is designed to flag departures from the plan rather than hide them
• Note that the skill refers to other named roles (review, QA, architecture); without those files installed, the agent will rely on your repository and chat context instead

What's inside

• SKILL.md