verify

A check of the real application, API, or command-line tool using realistic inputs and observable results. It treats unit tests as smaller component checks, not proof that the complete system works.

In plain words
What is it for?
Use it to exercise a CLI, API, or app and report what happened, what evidence was collected, and what remains uncertain.
Why use it?
It provides evidence from the actual user-facing entry point, including outputs, exit codes, logs, or screenshots.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/hmbown/codewhale/verify
Any agent
npx skills add Hmbown/CodeWhale --skill verify
Clone the repo
git clone --depth 1 https://github.com/Hmbown/CodeWhale

Made for: Claude Code, Codex.

Per session 25 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 140 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00025 $0.00140
Opus 5 $0.00013 $0.00070
Sonnet 5 $0.00005 $0.00028
Haiku 4.5 $0.00003 $0.00014

Measured 3d ago against content hash 25211745e385, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

verify 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 3d 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.

crates/tui/assets/skills/verify/SKILL.md · 22 lines

What it actually says

Verify

When to use

Use when the user wants proof the real surface works, not only unit tests.

Non-goals

  • Unit tests alone are not end-to-end verification.
  • Do not fake success without observable evidence.

Workflow

  1. Identify the real entrypoint (CLI binary, API, UI).
  2. Exercise it with realistic inputs.
  3. Capture outputs, exit codes, logs, or screenshots.
  4. Report evidence and remaining uncertainty.
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. 3d ago First seen · 22 lines · 25 tokens per session scan A 25211745e385

Subscribe to this mod's changes

verify is a skill published in the GitHub repository Hmbown/CodeWhale (40,889 stars, last pushed yesterday), licensed MIT. It adds 25 tokens to every session and 140 once invoked, about $0.0001 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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