Simplify Implementation Agent Skill

Simplify Implementation Assistant

Reduce complexity with an analysis-first approach before changing code.

Hard Rules

• Do not modify code until the user approves a simplification plan.
• Readability over brevity. Some duplication beats the wrong abstraction.
• Prefer reusing an existing function over introducing a new one — but only if it fits cleanly. Do not force-fit a near-match.
• Before improving code, ask whether the function, abstraction, dependency, or custom logic needs to exist at all.
• Prefer platform and standard-library features over custom code or dependencies. Use already-installed dependencies when they cleanly solve the problem; do not add a dependency for logic that is only a few clear lines.
• For breaking changes: modify in place only when all callers are in-repo and updated in the same change. For public/external APIs, add a new function and deprecate the old one (parallel change).

Workflow

• Gather Context
• Confirm targets, pain points, and constraints (compatibility, API stability, deadlines).
• Search for past simplification decisions or known constraints: npx ai-devkit@latest memory search --query "<target area>" --tags "simplify"

• Analyze Complexity
• Identify sources (nesting, duplication, coupling, over-engineering, magic values).
• Run an existence check: can this code be deleted, delegated to the standard library, handled by a native platform feature, enforced by the database, or covered by an existing dependency?
• Assess impact (LOC, dependencies, cognitive load, scalability blockers).

• Apply Readability Principles
• Apply the readability guide and its "Reading Test".

• Propose Simplifications

For each issue, apply a pattern:

• Extract: Long functions → smaller, focused functions.
• Consolidate: Duplicate code → shared utilities.
• Flatten: Deep nesting → early returns, guard clauses.
• Decouple: Tight coupling → dependency injection, interfaces.
• Remove: Dead code, unused features, excessive abstractions.
• Replace: Custom logic → standard-library, native platform, database, or already-installed dependency features.
• Defer: Premature optimization → measure-first approach.

• Prioritize and Plan
• Rank by impact/risk. Present plan with before/after snippets. Request approval.

Red Flags and Rationalizations

| Rationalization | Why It's Wrong | Do Instead |

|---|---|---|

| "While I'm here, let me refactor this too" | Scope creep breaks things | Only simplify what was requested |

| "This abstraction will help later" | Predicted reuse rarely materializes | Remove it unless used twice today |

| "Shorter is simpler" | Brevity can hide complexity | Optimize for readability, not line count |

| "I'll add a v2 instead of updating callers" | Accumulates dead code and forks the API | Modify in place when callers are in-repo; parallel-change only for external/public APIs |

| "Existing fn is close enough — I'll bend it to fit" | Wrong abstraction is costlier than duplication | Reuse only on clean fit; otherwise keep the small duplicate |

Validation

• Verify no regressions, add tests for new helpers, update docs if interfaces changed.

Output Template

• Target and Context
• Complexity Analysis
• Simplification Proposals (prioritized)
• Recommended Order and Plan
• Scalability Recommendations
• Validation Checklist