iterate-until-verified

iterate-until-verified is a skill for Claude Code, Codex from devinilabs/pro-skill. It costs 75 tokens per session (1,458 once invoked), scanned A, a copy of iterate-until-verified, MIT.

A repeatable way to run a substantial task, check the result against clear requirements, and improve it until it passes. It can also package that process as a reusable prompt.

In plain words
What is it for?
Use it to coordinate subagents or independent reviewers, compare possible results, benchmark work against references, and apply a final critical review.
Why use it?
It reduces the risk of stopping at a first draft or silently changing the original request. The checks make “done” easier to judge.

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/devinilabs/pro-skill/iterate-until-verified
Any agent
npx skills add devinilabs/pro-skill --skill iterate-until-verified
Clone the repo
git clone --depth 1 https://github.com/devinilabs/pro-skill

Made for: Claude Code, Codex.

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 iterate-until-verified

README.md
[![agentmods](https://agentmods.dev/badge/skills/devinilabs/pro-skill/iterate-until-verified.svg)](https://agentmods.dev/skills/devinilabs/pro-skill/iterate-until-verified)
Your own site
<a href="https://agentmods.dev/skills/devinilabs/pro-skill/iterate-until-verified"><img src="https://agentmods.dev/badge/skills/devinilabs/pro-skill/iterate-until-verified.svg" alt="Measured on agentmods" height="20"></a>
Per session 75 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,458 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 100% copy Near-identical to another mod 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 $0.00075 $0.01458
Opus 5 $0.00037 $0.00729
Sonnet 5 $0.00015 $0.00292
Haiku 4.5 $0.00007 $0.00146

Measured 5d ago against content hash ca1ea516ab3a, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade A, and why

iterate-until-verified 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 5d 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.

Origin

This is a copy

100% identical to iterate-until-verified — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

agent-skills/codex/iterate-until-verified/SKILL.md · 157 lines

How it starts

The opening of the file, as written. The whole thing — 157 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Iterate Until Verified

Preserve the task. Strengthen the process around it.

Choose the mode

  • Execute: Complete the original task with the workflow below. Use this mode by default.
  • Compose: When the user asks for an improved prompt rather than the finished work, return a reusable prompt wrapper. Keep the original task authoritative and unchanged inside the wrapper.

Do not silently switch from composing a prompt to executing it.

1. Lock the original task

Extract:

  • outcome and deliverables
  • audience and use case
  • supplied inputs and references
  • constraints, tools, formats, and exclusions
  • authorized actions and protected boundaries
  • explicit definition of done

Treat these as the task contract. Do not replace the subject, invent requirements, relax constraints, expand permissions, or let the verification method become the deliverable.

Ask a question only when a missing answer would materially change the work and cannot be discovered safely. Otherwise, state a reasonable assumption and proceed.

2. Convert ambition into gates

Translate words such as perfect, best, professional, production-ready, or AAA into observable checks. Select only the dimensions relevant to the task:

  • correctness and factual accuracy
  • completeness against the request
  • craft, clarity, and audience fit
  • usability and accessibility
  • robustness, edge cases, and regression safety
  • performance, security, or compliance
  • visual, editorial, or technical fidelity to a supplied benchmark

Create a compact acceptance matrix:

Gate Verification method Pass condition Evidence
Relevant quality dimension Test, inspection, comparison, or read-back Observable binary condition Command, source, screenshot, output, or artifact

Prefer pass/fail conditions over vague scores. A strong reaction such as “wow” may be a useful signal, but it is never the only gate.

3. Decompose and assign

Split the task into the smallest meaningful workstreams with clear ownership, inputs, outputs, and integration boundaries.

Read the full file on GitHub · 157 lines

Files

What ships with it

2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 5d ago First seen · 157 lines · 75 tokens per session scan A ca1ea516ab3a

Subscribe to this mod's changes

iterate-until-verified is a skill published in the GitHub repository devinilabs/pro-skill (23 stars, last pushed 23d ago), licensed MIT. It adds 75 tokens to every session and 1,458 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to iterate-until-verified, differing in 0 lines, and is treated as a copy.

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