Find codebase patterns and examples

Find code patterns and usage examples across codebase

When working code examples beat documentation for learning and copy-paste reuse.

• · pattern description, feature name, example request

• · code examples with file:line references and variations

• · Codebase source files, grep/glob tools

• · Pattern not found in codebase
• · Stale example from deprecated code
• · Multiple conflicting patterns

• · Concrete line-number references
• · Multiple variations per pattern
• · Test pattern examples included