SDD-TAC Development Workflow

You should use this skill when performing tasks that affect three or more files, when implementing complex new features, or when conducting deep refactors. It automatically triggers when the task complexity requires more than simple ad-hoc changes.

The skill includes a mandatory 'Extend vs. Create' decision point. Using the AskUserQuestion tool, it forces a conscious choice between extending an existing code pattern found during the Scout phase or creating a new one, ensuring the codebase remains DRY (Don't Repeat Yourself).

It eliminates 'guesswork' coding. The Scout phase identifies all dependencies and existing patterns; the Plan phase defines the architecture and implementation sequence; and the Build phase executes the approved design. This reduces errors, prevents code duplication, and ensures architectural consistency.

The SDD-TAC Development Workflow is a specialized Claude Code skill that implements a systematic Scout-Plan-Build methodology. It is designed to manage complex coding tasks, feature implementations, and multi-file refactoring by enforcing a structured lifecycle of reconnaissance, design, and execution.

Phase 0 is a mandatory safety layer that checks for 'locked' files (like configuration or security files) and dangerous operations (like destructive SQL commands) before any code is modified. This prevents accidental system breakage during automated tasks.