verify-app

verify-app is an agent for Claude Code from sd0xdev/sd0x-harness. It costs 21 tokens per session (200 once invoked), scanned A, original, MIT.

A verification agent that runs an application's lint checks, type checks, and unit tests after code changes. It reports which checks passed and analyzes failures.

In plain words
What is it for?
Use it to validate changes, run the standard verification sequence, summarize failures, and identify the smallest likely repair.
Why use it?
It catches common code problems after an edit and turns test output into a short explanation of the likely cause and a suggested fix.

Agent for Claude Code

Written for Claude Code: effort in frontmatter. Also seen: model in frontmatter.

Part of the sd0x-dev-flow plugin — 101 skills, 16 agents, 5 hooks shipped together

Good fit Use it to validate changes, run the standard verification sequence, summarize failures, and identify the smallest likely repair.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/sd0xdev/sd0x-harness/verify-app
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/sd0xdev/sd0x-harness

Made for: Claude Code.

Or install sd0x-dev-flow, the plugin that ships this one along with the rest of its 101 skills, 16 agents, 5 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 verify-app

README.md
[![agentmods](https://agentmods.dev/badge/agents/sd0xdev/sd0x-harness/verify-app/github.svg)](https://agentmods.dev/agents/sd0xdev/sd0x-harness/verify-app)
Your own site
<a href="https://agentmods.dev/agents/sd0xdev/sd0x-harness/verify-app"><img src="https://agentmods.dev/badge/agents/sd0xdev/sd0x-harness/verify-app/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 verify-app

Your own site · 80×15
<a href="https://agentmods.dev/agents/sd0xdev/sd0x-harness/verify-app"><img src="https://agentmods.dev/badge/agents/sd0xdev/sd0x-harness/verify-app.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 21 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 200 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 $0.00021 $0.00200
Opus 5.5 $0.00008 $0.00080
Sonnet 5.5 $0.00004 $0.00040
Haiku 4.5 $0.00002 $0.00020

Measured 1mo ago against content hash b9aa2472b46e, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

verify-app 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.

agents/verify-app.md · 41 lines

What it actually says

Verify App

Workflow

sequenceDiagram
    participant V as Verify
    participant T as Tests
    participant R as Report

    V->>T: lint → typecheck → unit
    alt Pass
        T-->>R: ✅ Ready
    else Fail
        T-->>V: Error
        V->>V: Identify root cause
        V-->>R: Fix suggestion
    end

Output

## Result
- lint: ✅/❌
- typecheck: ✅/❌
- unit: ✅/❌

## Failure Analysis (if any)
- Root cause: <first error>
- Fix: <minimal patch>
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 · 41 lines · 21 tokens per session scan A b9aa2472b46e

Subscribe to this mod's changes

verify-app is an agent published in the GitHub repository sd0xdev/sd0x-harness (193 stars, last pushed 9d ago), licensed MIT. It adds 21 tokens to every session and 200 once invoked, about $0.0001 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 2026-08-30.