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 artemnovichkov/xcode-skills --skill adopt-c-bounds-safetygit clone --depth 1 https://github.com/artemnovichkov/xcode-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/artemnovichkov/xcode-skills/adopt-c-bounds-safety)<a href="https://agentmods.dev/skills/artemnovichkov/xcode-skills/adopt-c-bounds-safety"><img src="https://agentmods.dev/badge/skills/artemnovichkov/xcode-skills/adopt-c-bounds-safety/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/artemnovichkov/xcode-skills/adopt-c-bounds-safety"><img src="https://agentmods.dev/badge/skills/artemnovichkov/xcode-skills/adopt-c-bounds-safety.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 | $0.00050 | $0.00639 |
| Opus 5 | $0.00025 | $0.00319 |
| Sonnet 5 | $0.00010 | $0.00128 |
| Haiku 4.5 | $0.00005 | $0.00064 |
Grade A, and why
adopt-c-bounds-safety 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 yesterday.
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.
The source is not reproduced here
No licence file
A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.
What ships with it
5 files 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.
- yesterday Changed 56b9e08deb77
- 11d ago First seen · 31 lines · 50 tokens per session scan A 43f91341996c
adopt-c-bounds-safety is a skill published in the GitHub repository artemnovichkov/xcode-skills (20 stars, last pushed yesterday), with no licence file. It adds 50 tokens to every session and 639 once invoked, about $0.0003 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.
Other skills, from other repositories
bun-ffi
This skill should be used when the user asks about "bun:ffi", "foreign function interface", "calling C from Bun", "native libraries", "dlopen", "shared libraries", "calling native code", or integrating C/C++ libraries with Bun.
axint
Use Axint MCP tools to create, compile, validate, and repair Apple App Intents and Swift surfaces from TypeScript definitions.
ia-c-systems
C patterns for systems code, libraries, and native extensions: module layout, function decomposition, status-enum errors, memory safety, undefined behavior, and performance measurement. Use when writing, reviewing, refactoring, or debugging C, working with malloc lifetimes, buffer overflows, sanitizers, or Valgrind…
project-setup
Setup and hardening review for cross-platform modern-C++ (C++17) native projects, especially Node.js addons built with node-gyp / node-addon-api. Use when asked to "set up a native addon", "harden a C/C++ build", "review my binding.gyp", "add compiler hardening flags", "wire up AddressSanitizer/UBSan/TSan/clang-tidy"…
cpp-mentor
A general, self-adapting C++ mentor for any project. On first run with an empty profile it onboards: settles the goal and domain, derives a namespace from the goal, agrees conventions including the project's own error policy, and audits the developer's level in both C++ and the project's topic — with questions…
cpp-reinforcement-learning
C++ Reinforcement Learning best practices using libtorch (PyTorch C++ frontend) and modern C++17/20. Use when: Implementing RL algorithms in C++ for performance-critical applications Building production RL systems with libtorch Creating replay buffers and experience storage Optimizing RL training with GPU acceleration…