verify

A verification guide for checking a code change by running it and observing its actual behavior.

In plain words
What is it for?
Use it to identify the expected behavior, run the project’s relevant tests or commands, check a normal case and a failure case, and report whether the change is verified.
Why use it?
It prevents a change from being accepted just because the code looks correct, and exposes failures or differences between the intended and observed result.

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/initxy/noeta/verify
Any agent
npx skills add initxy/noeta --skill verify
Clone the repo
git clone --depth 1 https://github.com/initxy/noeta

Made for: Claude Code, Codex.

Per session 16 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 363 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 $0.00016 $0.00363
Opus 5 $0.00008 $0.00181
Sonnet 5 $0.00003 $0.00073
Haiku 4.5 $0.00002 $0.00036

Measured 2d ago against content hash 9ce703fa573a, 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 2d 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.

tests/_skills_builtin/verify/SKILL.md · 36 lines

What it actually says

Verify a change

Confirm that a code change truly does what it's supposed to — by running it and observing real behavior, not just by reading the diff.

Take the claim or feature under test from the conversation.

Steps

  1. Pin down the claim. Run git_diff and read on the touched code to state, in one sentence, what behavior this change is supposed to produce.
  2. Find how this project runs and tests. read the manifest / Makefile / CI config and grep for existing test commands so you use the project's real entry points rather than inventing them.
  3. Exercise it with shell_run:
    • Run the relevant automated tests (whole suite or a targeted single test) and read the output.
    • If behavior is observable another way (a CLI command, a script, a smoke run), execute that too and capture the actual output.
  4. Compare observed behavior against the claim from step 1. Cover the happy path and at least one edge / failure case the change should handle.
  5. Report a clear verdict: verified or not verified. Quote the exact command(s) you ran and the output you observed. If it fails, point to the smallest reproducing command and the precise mismatch between expected and actual.

Do not "fix" the code here — only verify and report. If you had to change anything to make it runnable, call that out explicitly.

(fork agent: general-purpose)

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. 2d ago First seen · 36 lines · 16 tokens per session scan A 9ce703fa573a

Subscribe to this mod's changes

verify is a skill published in the GitHub repository initxy/noeta (9 stars, last pushed 4d ago), licensed Apache-2.0. It adds 16 tokens to every session and 363 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 2026-08-31.