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# Historical Comment Management — Code Clarity Guidelines
> **Agent role**: When encountering historical comments about removed
> methods, deprecated patterns, or architectural changes, apply these
> guidelines to maintain code clarity and developer guidance.
## Overview
Historical comments should either be **removed entirely** or **transformed
into actionable guidance** for future developers. Avoid keeping comments
that merely state what was removed without explaining why or what to do
instead.
## Decision Framework
### When to Remove Comments
- **Obsolete Information**: Comment describes functionality that no
longer exists
- **Outdated Context**: Comment refers to old patterns that are no
longer relevant
- **No Actionable Value**: Comment doesn't help future developers
make decisions
### When to Transform Comments
- **Migration Guidance**: Future developers might need to understand
the evolution
- **Alternative Approaches**: The comment can guide future
implementation choices
- **Historical Context**: Understanding the change helps with
current decisions
## Transformation Patterns
### 1. **Removed Method** → **Alternative Approach**
```typescript
// Before: Historical comment
// turnOffNotifyingFlags method removed - notification state is now
// managed by NotificationSection component
// After: Actionable guidance
// Note: Notification state management has been migrated to
// NotificationSection component
```
### 2. **Deprecated Pattern** → **Current Best Practice**
```typescript
// Before: Historical comment
// Database access has been migrated from direct IndexedDB calls to
// PlatformServiceMixin
// After: Actionable guidance
// This provides better platform abstraction and consistent error
// handling across web/mobile/desktop
// When adding new database operations, use this.$getContact(),
// this.$saveSettings(), etc.
```
## Best Practices
### 1. **Use Actionable Language**: Guide future decisions, not just
document history
### 2. **Provide Alternatives**: Always suggest what to use instead
### 3. **Update Related Docs**: If removing from code, consider
adding to documentation
### 4. **Keep Context**: Include enough information to understand
why the change was made
## Integration Points
- Apply these rules when reviewing code changes
- Use during code cleanup and refactoring
- Include in code review checklists
---
**See also**:
- `.cursor/rules/development/historical_comment_patterns.mdc` for detailed
transformation examples and patterns
**Status**: Active comment management guidelines
**Priority**: Medium
**Estimated Effort**: Ongoing reference
**Dependencies**: None
**Stakeholders**: Development team, Code reviewers
## Model Implementation Checklist
### Before Comment Review
- [ ] **Code Analysis**: Review code for historical or outdated comments
- [ ] **Context Understanding**: Understand the current state of the codebase
- [ ] **Pattern Identification**: Identify comments that need transformation or removal
- [ ] **Documentation Planning**: Plan where to move important historical context
### During Comment Management
- [ ] **Transformation**: Convert historical comments to actionable guidance
- [ ] **Alternative Provision**: Suggest current best practices and alternatives
- [ ] **Context Preservation**: Maintain enough information to understand changes
- [ ] **Documentation Update**: Move important context to appropriate documentation
### After Comment Management
- [ ] **Code Review**: Ensure transformed comments provide actionable value
- [ ] **Documentation Sync**: Verify related documentation is updated
- [ ] **Team Communication**: Share comment transformation patterns with team
- [ ] **Process Integration**: Include comment management in code review checklists