assay

assay is a command for Claude Code from astamvalley/claude-foundation. It costs 48 tokens per session (2,675 once invoked), scanned B, original, no licence file.

A code-review command that examines files, changes, or supplied code from architectural, logic, and security angles, then combines the findings.

In plain words
What is it for?
Use it to review a file, a code change, or a code sample for design issues, incorrect behaviour, and security risks.
Why use it?
It gives separate kinds of review in one result, helping reveal problems that a single review might miss.

Command for Claude Code

Written for Claude Code: argument-hint in frontmatter.

Part of the crb plugin — 7 skills, 14 commands shipped together

Good fit Use it to review a file, a code change, or a code sample for design issues, incorrect behaviour, and security risks.

Compare 6 commands from other repositories ↓
Install with agentmods
npx agentmods add commands/astamvalley/claude-foundation/assay
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.

Clone the repo
git clone --depth 1 https://github.com/astamvalley/claude-foundation

Made for: Claude Code.

Or install crb, the plugin that ships this one along with the rest of its 7 skills, 14 commands.

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 assay

README.md
[![agentmods](https://agentmods.dev/badge/commands/astamvalley/claude-foundation/assay.svg)](https://agentmods.dev/commands/astamvalley/claude-foundation/assay)
Your own site
<a href="https://agentmods.dev/commands/astamvalley/claude-foundation/assay"><img src="https://agentmods.dev/badge/commands/astamvalley/claude-foundation/assay.svg" alt="Measured on agentmods" height="20"></a>
Per session 48 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 2,675 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown 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 $0.00048 $0.02675
Opus 5 $0.00024 $0.01337
Sonnet 5 $0.00010 $0.00535
Haiku 4.5 $0.00005 $0.00267

Measured 7d ago against content hash 30d242094a93, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade B, and why

assay scanned grade B with 1 finding 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 7d 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.

Reads agent configuration directoriesmediumAgent snooping

.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.

CODEX_COMPANION=$(find ~/.claude/plugins -name "codex-companion.mjs" 2>/dev/null | head -1)
plugins/crb/commands/assay.md · 271 lines

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.

Read it on GitHub

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. 7d ago First seen · 271 lines · 48 tokens per session scan B 30d242094a93

Subscribe to this mod's changes

assay is a command published in the GitHub repository astamvalley/claude-foundation (2 stars, last pushed 4mo ago), with no licence file. It adds 48 tokens to every session and 2,675 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it B with 1 finding (reads agent configuration directories). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.