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.
/plugin marketplace add photostructure/coding-skillsnpx agentmods add plugins/photostructure/coding-skills/cppgit clone --depth 1 https://github.com/photostructure/coding-skillsGrade A, and why
cpp 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.
What it actually says
{
"name": "cpp",
"version": "1.1.3",
"description": "Two complementary modern-C++ (C++17) native-addon skills for Claude Code. resource-review traces object and resource lifetimes and reports only proven memory/resource defects (use-after-free, double-free, leaks, out-of-bounds, integer overflow, data races, Node-API handle/reference/threadsafe-function misuse), using a sanitizer stack trace as proof. project-setup assesses cross-platform node-gyp build configuration, per-OS/per-arch compiler hardening, sanitizer/static-analysis/CI wiring, and maintainable modern-C++ conventions (RAII, ownership, rule of five, exception safety across the C ABI) with evidence-backed Met/Gap/Not applicable/Needs verification states.",
"author": {
"name": "Matthew McEachen",
"url": "https://photostructure.com/coding/"
},
"homepage": "https://photostructure.com/coding/",
"license": "CC-BY-SA-4.0",
"keywords": [
"claude-code",
"skills",
"cpp",
"c-plus-plus",
"modern-cpp",
"memory-safety",
"resource-management",
"raii",
"node-api",
"node-addon-api",
"node-gyp",
"native-addon",
"sanitizers",
"addresssanitizer",
"clang-tidy",
"compiler-hardening",
"cross-platform"
]
}
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 First seen · 31 lines scan A 3137923af6c8
cpp is a plugin published in the GitHub repository photostructure/coding-skills (3 stars, last pushed 2d ago), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. 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 2026-08-31.
Other plugins, from other repositories
decision-records
Creates, supersedes and validates decision records (ADRs) against the convention a collection already follows, instead of against a published spec it may never have adopted. Ships the decision-records skill: a propose-then-write flow that never rewrites an accepted record, and check-decisions.sh, a validator that…
privacy-guard
Keeps private infrastructure details out of public repositories. Ships the privacy-guard skill: session rules for what must never cross the public boundary, plus a per-repo pre-commit gate built on a gitignored local denylist and gitleaks. The denylist is never committed, so the hook is a no-op for external…
github-workflow
Git commit, PR creation, review, and merge skills following Conventional Commits.
skill-authoring
Guide for creating Claude Code skills following Anthropic's best practices.
dev-agent-skills
Plugin marketplace listing 5 plugins: github-workflow, skill-authoring, guardrails, privacy-guard, decision-records.
guardrails
Safety guardrails for running Claude Code with reduced supervision. The guard-destructive PreToolUse hook matches against a normalized view of each command (heredoc bodies and comments stripped, quoted strings neutralized except interpreter arguments like ssh / sh -c / eval / su / doas), so a command that merely…