exemplar-audit

exemplar-audit is a skill for Claude Code from Kevin-Liu-01/Agent-Machines. It costs 70 tokens per session (1,092 once invoked), scanned A, original, MIT.

A review method that compares a software subsystem with established open-source implementations. A subsystem is one focused part of a larger program, such as storage or networking.

In plain words
What is it for?
It is for auditing code against mature examples and standards such as POSIX, FUSE, WAL, S3, or NFS.
Why use it?
It helps uncover missing edge cases, error handling, and rules that may be overlooked in a new implementation or refactor.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Good fit It is for auditing code against mature examples and standards such as POSIX, FUSE, WAL, S3, or NFS.

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Install with agentmods
npx agentmods add skills/kevin-liu-01/agent-machines/exemplar-audit
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.

Any agent
npx skills add Kevin-Liu-01/Agent-Machines --skill exemplar-audit
Clone the repo
git clone --depth 1 https://github.com/Kevin-Liu-01/Agent-Machines

Made for: Claude Code.

Wrote 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.

agentmods badge for exemplar-audit

README.md
[![agentmods](https://agentmods.dev/badge/skills/kevin-liu-01/agent-machines/exemplar-audit/github.svg)](https://agentmods.dev/skills/kevin-liu-01/agent-machines/exemplar-audit)
Your own site
<a href="https://agentmods.dev/skills/kevin-liu-01/agent-machines/exemplar-audit"><img src="https://agentmods.dev/badge/skills/kevin-liu-01/agent-machines/exemplar-audit/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.

agentmods 80×15 button for exemplar-audit

Your own site · 80×15
<a href="https://agentmods.dev/skills/kevin-liu-01/agent-machines/exemplar-audit"><img src="https://agentmods.dev/badge/skills/kevin-liu-01/agent-machines/exemplar-audit.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 70 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,092 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 1 finding, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • medium Excessive Agency · line 103
    Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.
    Fix: Add human-in-the-loop confirmation for destructive, irreversible, or high-impact operations. Never auto-execute commands that modify files, send data, or alter system state.
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00070 $0.01092
Opus 5 $0.00035 $0.00546
Sonnet 5 $0.00014 $0.00218
Haiku 4.5 $0.00007 $0.00109

Measured 11d ago against content hash adf934885cbd, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

exemplar-audit 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 11d 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.

knowledge/skills/exemplar-audit/SKILL.md · 117 lines

How it starts

The opening of the file, as written. The whole thing — 117 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Exemplar Audit

Find what the best implementations do that we don't, then close the gaps. This is the "measure twice" pass: compare our code against battle-tested references before declaring it done.

When to use

  • After implementing a new subsystem (filesystem, protocol, cache)
  • After a refactor that changed invariant-bearing code
  • When reviewing code that implements a known standard
  • When the user says /exemplar-audit or /refine --pass 6
  • When you suspect edge cases are missing but don't know which ones

Procedure

1. Identify exemplars

Check these sources in order:

  1. This monorepo first. The best reference for "how we do X" is often another subsystem that already does X well. GitHub Actions workflows, Terraform modules, Rust crates, Go controllers -- scan for the most mature sibling before looking externally.
  2. Module docs and READMEs in the subsystem being audited. Look for "References", "Inspired by", "See also", or citations to external projects.
  3. storage.md, architecture.md, or equivalent design docs. These often name reference implementations.
  4. The internet. Search for "canonical open-source implementation of {thing}". Prefer projects with >1000 stars, active maintenance, and a test suite.

Examples of good exemplars by domain:

Domain Internal exemplar External exemplar
GitHub Actions host-agent-rust.yml, host-agent-kvm.yml --
Terraform apps/cloud/apps/dcs/tf/main.tf checkov rules
Rust CI crate host-agent (same workspace) --
FUSE filesystem -- fuser SimpleFS, FUSE memfs
SQLite metadata -- JuiceFS pkg/meta/sql.go
WAL replication -- Litestream, libSQL bottomless
S3 chunk store -- JuiceFS pkg/object/s3.go
VFS layer -- Linux fs/fuse/dir.c
Content-addressed storage -- git sha1-file.c, Perkeep

2. Clone or read

Clone into /tmp to avoid polluting the workspace:

Read the full file on GitHub · 117 lines

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.

  1. 11d ago First seen · 117 lines · 70 tokens per session scan A adf934885cbd

Subscribe to this mod's changes

exemplar-audit is a skill published in the GitHub repository Kevin-Liu-01/Agent-Machines (29 stars, last pushed yesterday), licensed MIT. It adds 70 tokens to every session and 1,092 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.

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