CCA-F: Claude Certified Architect — Foundations

A rename task is mechanical and has a clearly verifiable outcome: find every usage of a symbol and update it consistently, which built-in search tools (Grep/Glob) handle well without needing a heavy staged process. Improving error handling across a module, by contrast, is judgment-intensive and broad in scope — it requires analyzing existing failure points and data flows, deciding which errors matter, what constitutes a 'meaningful' message, and how to avoid silently corrupting data, then proposing that strategy before applying wide-reaching edits. An explicit analyze → propose → implement-with-review workflow surfaces the agent's plan and assumptions for human validation before broad code changes are made, reducing the risk of inconsistent or overly broad exception handling and ensuring the fixes actually address the module's real failure modes. This is why an explicit multi-phase workflow provides the greatest quality improvement for the error-handling request rather than the simple rename.