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Reviews code for unnecessary complexity, excessive nesting, redundant abstractions, and over-engineering. Use when code feels over-engineered, before PRs, or after implementations. Complements code-reviewer (correctness) by focusing purely on simplicity and readability.
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Root-cause-first debugging methodology for any bug, test failure, exception, or unexpected behavior — mandates investigation before proposing fixes. Use when something is broken, not working, crashing, or throwing errors; triggers: debug, error, bug, exception, stack trace, not working, crash.
Browser automation and testing using playwright-cli (stateful Bash CLI for scripted tests — network inspection, console monitoring, screenshots, tracing) and Browser-Use MCP (autonomous agent flows). Use when the user needs to test web apps, debug browser issues, analyze performance, fill forms, run E2E user flows, or inspect network/console activity.
Use when working through a specific problem or decision using a single reasoning framework applied deeply and interactively. Covers First Principles (break assumptions, rebuild from truth), Inversion (guarantee failure, then flip), Regret Minimization (decide from age 80), and Opportunity Cost (make tradeoffs visible). Triggers: "first principles", "inversion", "regret minimization", "opportunity cost", "help me think through", "challenge my assumptions", "what am I giving up", "work backwards from failure", "what would I regret".
基于 SOC 职业分类
| name | code-simplifier |
| description | Reviews code for unnecessary complexity, excessive nesting, redundant abstractions, and over-engineering. Use when code feels over-engineered, before PRs, or after implementations. Complements code-reviewer (correctness) by focusing purely on simplicity and readability. |
| allowed-tools | Read, Grep, Glob |
| agent | code-simplifier |
| context | fork |
| metadata | {"triggers":"over-engineered, simplify, too complex, unnecessary abstraction, reduce complexity, simplify code, premature abstraction","related-skills":"code-reviewer, clean-code, dedup-code-agent","domain":"quality","role":"specialist","scope":"review","output-format":"report"} |
| last-reviewed | 2026-03-16 |
Iron Law: Never claim code is too complex without showing a concrete simpler alternative at the same file:line.
Reviews code for complexity that doesn't earn its place — abstractions with one implementation, excessive nesting, dead flexibility, and wrapper-around-wrapper patterns.
| Pattern | Description |
|---|---|
| Excessive nesting | 3+ levels of if/for/try — flatten with early returns |
| Premature abstraction | Factory/strategy/plugin with only 1 current implementation |
| Wrapper around wrapper | Class that just delegates with no added value |
| Over-parameterization | 5+ params where a config object would be clearer |
| Dead flexibility | Config flags, extension points with zero current users |
| Complex when simple | 15-line solution where a 3-line solution exists |
| Level | Meaning |
|---|---|
| HIGH | Abstraction adds zero value; removing it simplifies significantly |
| MEDIUM | Could be simplified; modest readability improvement |
| LOW | Minor cleanup; marginal improvement |
## Simplification Review: [scope]
### HIGH — Remove or simplify immediately
**[file:line] — [pattern name]**
Current: [description]
Simpler: [concrete suggestion]
Savings: ~N lines
### MEDIUM — Should simplify
- [file:line] [description] — [suggestion]
### Summary
- Issues: N (high: X, medium: Y, low: Z)
- Recommendation: Complexity acceptable / Simplify before merge