Borrowing it
Nothing to install: this file belongs to DGouron/review-flow. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/DGouron/review-flow/master/.claude/skills/anti-overengineering/SKILL.mdgit clone --depth 1 https://github.com/DGouron/review-flowWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/dgouron/review-flow/anti-overengineering)<a href="https://agentmods.dev/skills/dgouron/review-flow/anti-overengineering"><img src="https://agentmods.dev/badge/skills/dgouron/review-flow/anti-overengineering/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/dgouron/review-flow/anti-overengineering"><img src="https://agentmods.dev/badge/skills/dgouron/review-flow/anti-overengineering.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00033 | $0.01140 |
| Opus 5.5 | $0.00013 | $0.00456 |
| Sonnet 5.5 | $0.00007 | $0.00228 |
| Haiku 4.5 | $0.00003 | $0.00114 |
Grade A, and why
anti-overengineering scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 181 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Anti Over-Engineering Guidelines
Persona
Read .claude/roles/architect.md — adopt this profile and follow all its rules.
Activation
This skill activates for:
- Challenging a proposed implementation
- Deciding if a DDD/Clean Architecture pattern is justified
- Code review with suspicion of overengineering
- Refactoring toward more simplicity
Core Principle
"The best code is no code" - Solve problems with the minimum viable complexity.
YAGNI (You Aren't Gonna Need It)
↓
Pragmatic Architecture
↓
Progressive Enhancement
DDD Pattern Decision Matrix
When to Apply Patterns
| Pattern | ✅ Apply When | ❌ Avoid When |
|---|---|---|
| Value Object | Complex business rules, invariants to protect | Simple data structures, basic formatting |
| Entity | Identity-based objects with lifecycle | Stateless operations, simple data transfer |
| Aggregate | Complex transactional boundaries | Single entity operations, simple CRUD |
| Service | Stateless business logic, orchestration | Simple transformations, UI-only logic |
| Repository | Complex data access, multiple sources | Simple API calls, single gateway sufficient |
| Use Case | Business workflow orchestration | Single service calls, simple operations |
Overengineering Red Flags
- Creating Value Objects for
{name: string, email: string} - Adding Repository when Gateway suffices
- Using Domain Events for basic state changes
- Creating Aggregates for single-entity operations
- Factory patterns for simple object creation
- Command/Query separation without complex logic
Decision Tree
Before adding any pattern, ask:
1. Does current code fail to solve the problem?
└─ No → Don't add complexity
└─ Yes ↓
2. Is there actual business complexity?
└─ No → Use simpler approach
└─ Yes ↓
3. Will this pattern reduce overall complexity?
└─ No → Find simpler solution
└─ Yes ↓
4. Can you implement in <50 lines?
└─ Yes → Start simple, refactor later
└─ No → Pattern might be justified
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 2mo ago First seen · 181 lines · 33 tokens per session scan A 5a73753388c3
anti-overengineering is a skill published in the GitHub repository DGouron/review-flow (44 stars, last pushed today), licensed MIT. It adds 33 tokens to every session and 1,140 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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