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 G1Joshi/Agent-Skills --skill cgit clone --depth 1 https://github.com/G1Joshi/Agent-SkillsWrote 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/g1joshi/agent-skills/c)<a href="https://agentmods.dev/skills/g1joshi/agent-skills/c"><img src="https://agentmods.dev/badge/skills/g1joshi/agent-skills/c/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/g1joshi/agent-skills/c"><img src="https://agentmods.dev/badge/skills/g1joshi/agent-skills/c.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 | $0.00023 | $0.00291 |
| Opus 5 | $0.00012 | $0.00146 |
| Sonnet 5 | $0.00005 | $0.00058 |
| Haiku 4.5 | $0.00002 | $0.00029 |
Grade A, and why
c 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 5d 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
C
The foundational language for modern computing, operating systems, and embedded systems.
When to Use
- Operating Systems / Drivers
- Embedded Systems
- High-performance computing
- Legacy codebases
Quick Start
#include <stdio.h>
int main() {
printf("Hello, World!\n");
return 0;
}
Core Concepts
Pointers
Variables that store memory addresses.
int x = 10;
int *p = &x; // p holds address of x
printf("%d", *p); // Dereference p to get 10
Memory Management
Manual allocation and deallocation.
int *arr = (int*)malloc(10 * sizeof(int));
// use arr...
free(arr);
Structs
User-defined data types.
Best Practices
Do:
- Always initialized variables
- Check return values of
malloc - Guard against buffer overflows (use
snprintfoversprintf) - Use tools like Valgrind to check for leaks
Don't:
- Return pointers to local variables (stack memory)
- Use
gets()(unsafe)
References
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.
- 5d ago First seen · 71 lines · 23 tokens per session scan A 2f3f9ddf7329
c is a skill published in the GitHub repository G1Joshi/Agent-Skills (12 stars, last pushed 7mo ago), licensed MIT. It adds 23 tokens to every session and 291 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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