verifier

verifier is an agent for Claude Code from zeikar/hyperclaude. It costs 254 tokens per session (474 once invoked), scanned A, original, MIT.

A checking agent that runs the requested verification commands and compares the real output with what a code change was supposed to do.

In plain words
What is it for?
Use it after an implementation step to run tests, builds, linters, or manual checks and report the actual results. It does not change files.
Why use it?
It catches unfinished or broken work before someone declares a task complete. It reports PASS, PARTIAL, or FAIL with evidence instead of relying on a summary.

Agent for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: model in frontmatter.

Part of the hyperclaude plugin — 17 skills, 7 agents, 2 hooks shipped together

Good fit Use it after an implementation step to run tests, builds, linters, or manual checks and report the actual results. It does not change files.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/zeikar/hyperclaude/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/zeikar/hyperclaude

Made for: Claude Code.

Or install hyperclaude, the plugin that ships this one along with the rest of its 17 skills, 7 agents, 2 hooks.

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 verifier

README.md
[![agentmods](https://agentmods.dev/badge/agents/zeikar/hyperclaude/verifier/github.svg)](https://agentmods.dev/agents/zeikar/hyperclaude/verifier)
Your own site
<a href="https://agentmods.dev/agents/zeikar/hyperclaude/verifier"><img src="https://agentmods.dev/badge/agents/zeikar/hyperclaude/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 verifier

Your own site · 80×15
<a href="https://agentmods.dev/agents/zeikar/hyperclaude/verifier"><img src="https://agentmods.dev/badge/agents/zeikar/hyperclaude/verifier.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 254 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 474 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 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 $0.00254 $0.00474
Opus 5.5 $0.00102 $0.00190
Sonnet 5.5 $0.00051 $0.00095
Haiku 4.5 $0.00025 $0.00047

Measured 20d ago against content hash 46a1fc7558c2, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

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 20d 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.

agents/verifier.md · 53 lines

What it actually says

You are the verifier agent for hyperclaude. Your job is to check claims with evidence.

How you work

  1. Identify what was supposed to happen (from the plan/step description).
  2. Run the verification commands (tests, build, linter, manual smoke).
  3. Read the actual output. Don't trust summaries.
  4. Compare actual to expected.
  5. Report: PASS / PARTIAL / FAIL, with the specific evidence.

Constraints

  • Never write code or modify files.
  • Quote command output verbatim when reporting failures — paraphrasing hides bugs.
  • "Tests pass" is not a report. "Ran node --test tests/*.mjs — 20 tests passed, 0 failed, output attached" is a report.
  • If verification commands aren't defined, ask. Don't invent them.
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. 20d ago Changed 46a1fc7558c2
  2. 1mo ago First seen · 53 lines · 254 tokens per session scan A 4adaddc92014

Subscribe to this mod's changes

verifier is an agent published in the GitHub repository zeikar/hyperclaude (4 stars, last pushed 6d ago), licensed MIT. It adds 254 tokens to every session and 474 once invoked, about $0.0010 per session on Opus 5.5. 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 2026-08-31.