build-verifier

build-verifier is an agent for Claude Code from vincenthopf/My-Claude-Code. It costs 47 tokens per session (1,025 once invoked), scanned A, original, from a forked repository, no licence file.

An implementation checker that runs code, executes tests, and creates adversarial test cases. It compares the result with the problem definition and guiding principles, rather than only reading the code.

In plain words
What is it for?
Use it to verify bug fixes, features, or refactors before they move to integration checking.
Why use it?
It bases approval on observed behavior and test results instead of assuming that reviewed code works.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md). Also seen: model in frontmatter.

Good fit Use it to verify bug fixes, features, or refactors before they move to integration checking.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/vincenthopf/my-claude-code/build-verifier
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/vincenthopf/My-Claude-Code

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 build-verifier

README.md
[![agentmods](https://agentmods.dev/badge/agents/vincenthopf/my-claude-code/build-verifier/github.svg)](https://agentmods.dev/agents/vincenthopf/my-claude-code/build-verifier)
Your own site
<a href="https://agentmods.dev/agents/vincenthopf/my-claude-code/build-verifier"><img src="https://agentmods.dev/badge/agents/vincenthopf/my-claude-code/build-verifier/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 build-verifier

Your own site · 80×15
<a href="https://agentmods.dev/agents/vincenthopf/my-claude-code/build-verifier"><img src="https://agentmods.dev/badge/agents/vincenthopf/my-claude-code/build-verifier.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 47 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,025 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.
Origin fork From a forked repository.
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 $0.00047 $0.01025
Opus 5.5 $0.00019 $0.00410
Sonnet 5.5 $0.00009 $0.00205
Haiku 4.5 $0.00005 $0.00103

Measured 1mo ago against content hash fc5351858d79, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

build-verifier 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 1mo 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.

workflow/agents/build-verifier.md · 105 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

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. 1mo ago First seen · 105 lines · 47 tokens per session scan A fc5351858d79

Subscribe to this mod's changes

build-verifier is an agent published in the GitHub repository vincenthopf/My-Claude-Code (134 stars, last pushed 6mo ago), with no licence file. It adds 47 tokens to every session and 1,025 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. It comes from a forked repository.

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