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 kumaran-is/claude-code-onboarding --skill code-simplifiergit clone --depth 1 https://github.com/kumaran-is/claude-code-onboardingWrote 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/kumaran-is/claude-code-onboarding/code-simplifier)<a href="https://agentmods.dev/skills/kumaran-is/claude-code-onboarding/code-simplifier"><img src="https://agentmods.dev/badge/skills/kumaran-is/claude-code-onboarding/code-simplifier/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/kumaran-is/claude-code-onboarding/code-simplifier"><img src="https://agentmods.dev/badge/skills/kumaran-is/claude-code-onboarding/code-simplifier.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 | $0.00056 | $0.00553 |
| Opus 5.5 | $0.00022 | $0.00221 |
| Sonnet 5.5 | $0.00011 | $0.00111 |
| Haiku 4.5 | $0.00006 | $0.00055 |
Grade A, and why
code-simplifier 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.
What it actually says
Iron Law: Never claim code is too complex without showing a concrete simpler alternative at the same file:line.
Code Simplifier
Reviews code for complexity that doesn't earn its place — abstractions with one implementation, excessive nesting, dead flexibility, and wrapper-around-wrapper patterns.
When to Use
- Code works correctly but feels over-engineered
- Before opening a PR on new implementation
- When a reviewer says "couldn't you just do X?"
- After implementing a feature that grew beyond its original scope
What to Check
| 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 |
Severity Levels
| Level | Meaning |
|---|---|
| HIGH | Abstraction adds zero value; removing it simplifies significantly |
| MEDIUM | Could be simplified; modest readability improvement |
| LOW | Minor cleanup; marginal improvement |
Output Format
## 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
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 · 67 lines · 56 tokens per session scan A f1722870b929
code-simplifier is a skill published in the GitHub repository kumaran-is/claude-code-onboarding (36 stars, last pushed 4mo ago), licensed MIT. It adds 56 tokens to every session and 553 once invoked, about $0.0002 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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