agent-creator

agent-creator is a skill for Claude Code, Codex from mekotenkov-ux/seomeatagentscreator. It costs 78 tokens per session (1,437 once invoked), scanned A, original, MIT.

A process for creating, checking, packaging, and publishing production-ready AI agents, skills, and workflows.

In plain words
What is it for?
Use it when building a reusable agent package, from clarifying its purpose and risks through runtime integration, testing, and release review.
Why use it?
It prevents an agent from depending only on instructions by requiring defined permissions, tools, validation, artifacts, and review.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions subagents.

Good fit Use it when building a reusable agent package, from clarifying its purpose and risks through runtime integration, testing, and release review.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/mekotenkov-ux/seomeatagentscreator/agent-creator
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.

Any agent
npx skills add mekotenkov-ux/seomeatagentscreator --skill agent-creator
Clone the repo
git clone --depth 1 https://github.com/mekotenkov-ux/seomeatagentscreator

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 agent-creator

README.md
[![agentmods](https://agentmods.dev/badge/skills/mekotenkov-ux/seomeatagentscreator/agent-creator/github.svg)](https://agentmods.dev/skills/mekotenkov-ux/seomeatagentscreator/agent-creator)
Your own site
<a href="https://agentmods.dev/skills/mekotenkov-ux/seomeatagentscreator/agent-creator"><img src="https://agentmods.dev/badge/skills/mekotenkov-ux/seomeatagentscreator/agent-creator/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 agent-creator

Your own site · 80×15
<a href="https://agentmods.dev/skills/mekotenkov-ux/seomeatagentscreator/agent-creator"><img src="https://agentmods.dev/badge/skills/mekotenkov-ux/seomeatagentscreator/agent-creator.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 78 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,437 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 $0.00078 $0.01437
Opus 5 $0.00039 $0.00718
Sonnet 5 $0.00016 $0.00287
Haiku 4.5 $0.00008 $0.00144

Measured 10d ago against content hash 0fc972a6c0ab, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

agent-creator 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 10d 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.

agent-system/skills/agent-creator/SKILL.md · 142 lines

How it starts

The opening of the file, as written. The whole thing — 142 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Agent Creator

Создавайте агентские пакеты как переносимые системы, а не как промпты, которые работают только в текущем чате.

Core rule

Модель предлагает. Runtime, tools, tests, permissions, artifacts и reviewers доказывают.

Не доверяйте safety, tool execution, validation, memory hygiene и final acceptance только инструкции в промпте.

Перед началом

  1. Прочитайте ../grill-me/SKILL.md.
  2. Зафиксируйте objective, target users, maturity, scope, autonomy, risk, allowed/forbidden actions, data sources, target platforms, export shape, validation и done condition.
  3. Прочитайте ../workflow-loop-me/SKILL.md и соберите workflow notes, candidate loops и выбранный workflow spec.
  4. Если пользователь дал ссылки на репозитории или инструменты, прочитайте ../repo-tool-librarian/SKILL.md и сохраните их как catalog candidates без интеграции.
  5. Для production/library/governed пакетов прочитайте references/production-skill-os.md.

Обязательная форма серьезного agent package

  • router / instruction entrypoint;
  • Agent/Skill IR;
  • versioned system identity and harness boundary for session, harness, sandbox, artifact store and credential broker;
  • default-deny permission policy with approval binding, provenance-aware data flow and runtime enforcement;
  • append-only run-event contract for effects, permissions, transfers, state revisions and budgets;
  • workflow discovery notes, workflow spec и discovery ledger;
  • repo/tool library для идей и reusable building blocks, не для автоматической интеграции;
  • platform adapters;
  • birth contract, runtime profile, birth plan, environment readiness и project context templates;
  • IDE/runtime adaptation policy;
  • focused skills или workflows;
  • typed tool registry;
  • permission matrix;
  • hook registry, lifecycle event mappings и hook validation для правил, требующих автоматического enforcement;
  • subagent topology decision, role registry, delegation plan, task/result contracts, run ledger, isolation, lifecycle и Subagent Eval Lab;
  • memory and state model;
  • workspace hygiene rules;
  • checker/reviewer layer;
  • context packaging policy;
  • Trigger Lab;
  • eval-validity report with task inventory, feasibility witnesses, grader mapping, contamination checks and frozen holdout;
  • Output Eval Lab with outcome, trajectory, boundary and stability graders, repeated trials and infrastructure calibration;
  • Harness Assumption Registry and matched-budget Ablation Lab;
  • workflow/negative fixtures;
  • skill training lab and skill-candidate lifecycle;
  • target conformance matrix;
  • final evidence contract;
  • release review;
  • machine-readable release decision that reconciles required gates and derives allowed claims;
  • evidence ledger and claim guard;
  • package verification;
  • install simulation from final zip;
  • post-birth cleanup;
  • runtime/devkit boundary.

Read the full file on GitHub · 142 lines

Files

What ships with it

1 file 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. 10d ago First seen · 142 lines · 78 tokens per session scan A 0fc972a6c0ab

Subscribe to this mod's changes

agent-creator is a skill published in the GitHub repository mekotenkov-ux/seomeatagentscreator (5 stars, last pushed 1mo ago), licensed MIT. It adds 78 tokens to every session and 1,437 once invoked, about $0.0004 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.

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