Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add christopherlouet/claude-base --skill dev-refactorgit clone --depth 1 https://github.com/christopherlouet/claude-baseWrote 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/christopherlouet/claude-base/dev-refactor)<a href="https://agentmods.dev/skills/christopherlouet/claude-base/dev-refactor"><img src="https://agentmods.dev/badge/skills/christopherlouet/claude-base/dev-refactor/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/christopherlouet/claude-base/dev-refactor"><img src="https://agentmods.dev/badge/skills/christopherlouet/claude-base/dev-refactor.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00027 | $0.00889 |
| Opus 5.5 | $0.00011 | $0.00356 |
| Sonnet 5.5 | $0.00005 | $0.00178 |
| Haiku 4.5 | $0.00003 | $0.00089 |
Grade A, and why
dev-refactor 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 26d 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 — 159 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Code Refactoring
Principles
- Tests pass BEFORE and AFTER
- Small incremental changes
- One type of change at a time
- Commit after each refactoring
Common techniques
Extract Function
// Before
function processOrder(order) {
// 20 lines of validation
// 30 lines of calculation
// 10 lines of sending
}
// After
function processOrder(order) {
validateOrder(order);
const total = calculateTotal(order);
sendConfirmation(order, total);
}
Extract Variable
// Before
if (user.age >= 18 && user.country === 'FR' && !user.banned) { }
// After
const isAdult = user.age >= 18;
const isFrench = user.country === 'FR';
const isActive = !user.banned;
if (isAdult && isFrench && isActive) { }
Replace Conditional with Polymorphism
// Before
function getPrice(type) {
switch(type) {
case 'basic': return 10;
case 'premium': return 20;
}
}
// After
interface Plan { getPrice(): number }
class BasicPlan implements Plan { getPrice() { return 10; } }
class PremiumPlan implements Plan { getPrice() { return 20; } }
Code Smells to detect
| Smell | Refactoring |
|---|---|
| Long method | Extract Method |
| Large class | Extract Class |
| Duplicate code | Extract + Reuse |
| Long parameter list | Parameter Object |
| Feature envy | Move Method |
| Primitive obsession | Value Object |
Reducing Entropy (Complexity reduction)
Complexity metrics
| Metric | Alert threshold | How to measure |
|---|---|---|
| Cyclomatic complexity | > 10 per function | Number of branches (if/else/switch) |
| Nesting depth | > 3 levels | Nesting of if/for/while |
| Function length | > 50 lines | Number of lines |
| Number of parameters | > 4 | Function parameters |
| Afferent/efferent coupling | Unstable ratio | Incoming/outgoing dependencies |
| File size | > 300 lines | Lines of code |
Reduction techniques
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 26d ago Changed · -2 lines 81a142117b9f
- 27d ago Changed · -6 lines 4f23fe074f62
- 28d ago Changed · -1 lines 9b7936b54aff
- 1mo ago First seen · 168 lines · 27 tokens per session scan A b17a680b9633
dev-refactor is a skill published in the GitHub repository christopherlouet/claude-base (5 stars, last pushed 6d ago), licensed MIT. It adds 27 tokens to every session and 889 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 2026-09-03.
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