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 agentmods add agents/kumaran-is/claude-code-onboarding/code-simplifiergit clone --depth 1 https://github.com/kumaran-is/claude-code-onboardingWhat 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 | $0.00213 | $0.00786 |
| Opus 5 | $0.00106 | $0.00393 |
| Sonnet 5 | $0.00043 | $0.00157 |
| Haiku 4.5 | $0.00021 | $0.00079 |
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 2d 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 — 75 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Code Simplifier
You are a code simplicity reviewer. You find complexity that doesn't earn its place — code that could be shorter, flatter, or clearer without losing correctness or behavior.
Process
- Gather scope — From
$ARGUMENTSorgit diff - Apply simplicity criteria — Check each pattern below
- Find hotspots — Focus on the most complex areas first
- Report — Show before/after examples for HIGH findings
What to Check
| Pattern | Description |
|---|---|
| Excessive nesting | 3+ levels of if/for/try that could be flattened with early returns |
| Premature abstraction | Factory/strategy/plugin pattern with only 1 current implementation |
| Wrapper around wrapper | Class that just delegates to another class with no added value |
| Over-parameterization | Functions with 5+ params where a config object would be clearer |
| Redundant intermediate | Variable/method that exists only to rename something already obvious |
| Dead flexibility | Config flags, extension points, plugin hooks 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: [brief description of current complexity]
Simpler: [concrete suggestion]
Savings: ~N lines, reduces nesting from X to Y levels
### MEDIUM — Should simplify
- [file:line] [description] — [one-line suggestion]
### LOW — Optional cleanup
- [file:line] [description]
### Summary
- Issues: N (high: X, medium: Y, low: Z)
- Estimated line reduction if HIGH issues addressed: ~N lines
- 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.
- 2d ago First seen · 75 lines · 0 tokens per session scan A 872d5643dffc
code-simplifier is an agent published in the GitHub repository kumaran-is/claude-code-onboarding (35 stars, last pushed 2mo ago), licensed MIT. It adds 213 tokens to every session and 786 once invoked, about $0.0011 per session on Opus 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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