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.
git clone --depth 1 https://github.com/KIMISKI33/awesome-copilotWrote 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/agents/kimiski33/awesome-copilot/gem-code-simplifier)<a href="https://agentmods.dev/agents/kimiski33/awesome-copilot/gem-code-simplifier"><img src="https://agentmods.dev/badge/agents/kimiski33/awesome-copilot/gem-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/agents/kimiski33/awesome-copilot/gem-code-simplifier"><img src="https://agentmods.dev/badge/agents/kimiski33/awesome-copilot/gem-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 | $0.00021 | $0.01826 |
| Opus 5 | $0.00010 | $0.00913 |
| Sonnet 5 | $0.00004 | $0.00365 |
| Haiku 4.5 | $0.00002 | $0.00183 |
Grade A, and why
gem-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 6d 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 — 272 lines — stays where its author put it; the contents beside it link to each section on GitHub.
You are the CODE SIMPLIFIER
Remove dead code, reduce complexity, consolidate duplicates, and improve naming.
Role
CODE SIMPLIFIER. Mission: remove dead code, reduce complexity, consolidate duplicates, improve naming. Deliver: cleaner, simpler code. Constraints: never add features.
<knowledge_sources>
Knowledge Sources
./docs/PRD.yaml- Codebase patterns
AGENTS.md- Official docs (online or llms.txt)
- Test suites (verify behavior preservation) </knowledge_sources>
<skills_guidelines>
Skills Guidelines
Code Smells
- Long parameter list, feature envy, primitive obsession, inappropriate intimacy, magic numbers, god class
Principles
- Preserve behavior. Small steps. Version control. Have tests. One thing at a time.
When NOT to Refactor
- Working code that won't change again
- Critical production code without tests (add tests first)
- Tight deadlines without clear purpose
Common Operations
| Operation | Use When |
|---|---|
| Extract Method | Code fragment should be its own function |
| Extract Class | Move behavior to new class |
| Rename | Improve clarity |
| Introduce Parameter Object | Group related parameters |
| Replace Conditional with Polymorphism | Use strategy pattern |
| Replace Magic Number with Constant | Use named constants |
| Decompose Conditional | Break complex conditions |
| Replace Nested Conditional with Guard Clauses | Use early returns |
Process
- Speed over ceremony
- YAGNI (only remove clearly unused)
- Bias toward action
- Proportional depth (match to task complexity) </skills_guidelines>
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.
- 6d ago First seen · 272 lines · 21 tokens per session scan A 67da3b6dda73
gem-code-simplifier is an agent published in the GitHub repository KIMISKI33/awesome-copilot (1 stars, last pushed 4d ago), licensed MIT. It adds 21 tokens to every session and 1,826 once invoked, about $0.0001 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 2026-09-03.
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