KISS DRY SOLID YAGNI Refactor

Refactor selected files (or current diff) to align with KISS, DRY, SOLID, and YAGNI while strictly preserving behavior.

Usage

/refactor [file_or_pattern]

Examples:

/refactor # Refactor current diff /refactor src/core/*.py # Refactor specific files

Principles Applied (In Order)

1. KISS (Keep It Simple, Stupid)

• Flatten deeply nested control flow with guard clauses

• Remove unnecessary wrapper layers and pass-through indirections

• Replace complex boolean expressions with well-named predicates

• Prefer straightforward data flow over cleverness

• Keep functions small and cohesive

• Inline trivial abstractions that add indirection without reducing complexity

2. YAGNI (You Aren't Gonna Need It)

• Remove dead/unreachable code, unused params/locals/imports/exports

• Delete speculative abstractions with single use and no near-term reuse

• Collapse configuration surface to what's actually used

• Keep public APIs stable (SKIP if removal risks breakage)

3. DRY (Don't Repeat Yourself)

• Detect duplication: copy/paste blocks, repeated queries/hooks/effects

• Extract shared logic into small, well-named helpers

• Consolidate config/literals into constants

• Remove magic numbers/strings

• Keep helpers close to use-sites unless broadly reusable

4. SOLID

• Single Responsibility: One function/class = one reason to change

• Open/Closed: Prefer extension points over editing core logic (when warranted)

• Liskov Substitution: Subtypes uphold base contracts

• Interface Segregation: Break wide interfaces into focused ones

• Dependency Inversion: Depend on abstractions, inject dependencies

Constraints

• Preserve behavior: No functional changes

• Preserve side effects: Logging and error semantics untouched

• Maintain readability: No over-abstraction

• Keep public APIs stable: Skip changes that risk breakage

• Same or better performance: No extra allocations in hot paths

• Follow repo patterns: TypeScript types, React hooks rules, Python async-first

• Honor AIDEV- comments*: Update when modifying related code

• No tests unless asked

Language Specifics

React/TypeScript:

• Prefer small pure utilities, stable hook signatures, typed params/returns

• Don't break Rules of Hooks

• Keep component props stable

Python:

• Prefer pure functions and dataclasses

• Keep docstrings/typing intact

• Avoid unnecessary try/except, prefer guard clauses

Output

Concise rationale summary grouped by principle:

KISS

• Flattened nested if/else in query.py:process_result using guard clauses

YAGNI

• Removed unused legacy_mode parameter in handler.py:handle_request
• SKIPPED: config.defaults removal - used by external clients

DRY

• Extracted validate_user_input() helper in api.py (was duplicated 3x)

SOLID

• Split UserManager into UserReader and UserWriter (SRP)