A security-review plugin containing 52 checks for common web, AI, API, and systems-programming bugs, along with pull-request, full-scan, and contract-review modes.

Use it for fast pull-request gates, broader security scans, deep reviews of assumptions between callers and implementations, and inline security fixes when supported by its checks.

It brings related security checks and review workflows into one add-on. The checks cover areas such as access control, injection, secrets, memory APIs, cryptography, privileges, concurrency, and numeric trust boundaries.

soundcheck — Plugin by thejefflarson

Install

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.

Claude Code

/plugin marketplace add thejefflarson/soundcheck

agentmods

npx agentmods add plugins/thejefflarson/soundcheck/marketplace

Clone the repo

git clone --depth 1 https://github.com/thejefflarson/soundcheck

Made for: Claude Code.

Per session not measured What this adds to a session before it is invoked.

When invoked not measured Not applicable: nothing here is loaded into a session.

Security scan A 0 findings. Scan, not verified.

Origin original No closer match found in the catalogue.

Security

Grade A, and why

soundcheck 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.

.claude-plugin/marketplace.json · 20 lines

What it actually says

{
  "name": "soundcheck",
  "owner": {
    "name": "Jeff"
  },
  "plugins": [
    {
      "name": "soundcheck",
      "description": "52 security skills covering OWASP Web Top 10:2025, LLM Top 10:2025, API Security Top 10:2023, and systems-software bug classes (memory-API misuse, crypto-library wiring, privilege handling, concurrency, numeric trust-boundary), plus three review modes (PR gate, full scan, contract review). Auto-invokes on vulnerable code and rewrites it inline.",
      "version": "1.17.2",
      "license": "MIT",
      "source": {
        "source": "github",
        "repo": "thejefflarson/soundcheck",
        "ref": "v1.17.2"
      }
    }
  ]
}

Files

What ships with it

1 file beside marketplace.json 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.

plugin.json 770 B

Changes

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 · 20 lines scan A 74f734175659

Subscribe to this mod's changes

soundcheck is a plugin published in the GitHub repository thejefflarson/soundcheck (20 stars, last pushed 1mo 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 2026-08-30.

Code review Debugging Security llms skills

google-plugins

Plugin marketplace listing 17 plugins: alloydb, alloydb-omni, bigtable, cloud-sql-mysql, cloud-sql-postgresql.

google/skills · not measured

xcode-build-skills

A multi-skill plugin for benchmarking and optimizing Xcode builds, compile hotspots, project settings, and Swift Package Manager dependency overhead.

AvdLee/Xcode-Build-Optimization-Agent-Skill · not measured

liquid-glass

Apple-style liquid glass: frosted, refracting surfaces for web UI, with the rules that keep them from reading as gray boxes.

stormaref/LiquidGlassSkill · not measured

skillctx

Make your agent skills portable by extracting hardcoded values into a central config and embedding resolver scripts.

jackchuka/skillctx · not measured

discover

Discover which AI agent to build — map automation outcomes to solvable opportunities, validate assumptions, and decide build vs buy. Use when exploring agent ideas, analyzing automation opportunities, running build-or-buy analysis, or estimating agent development costs.

kimsanguine/hplan · not measured

encore-skills

Skills for building backend applications with Encore (Go and TypeScript).

encoredev/skills · not measured