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.
npx skills add manhvann/codexkit --skill coding-levelgit clone --depth 1 https://github.com/manhvann/codexkitWrote 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.
[](https://agentmods.dev/skills/manhvann/codexkit/coding-level)<a href="https://agentmods.dev/skills/manhvann/codexkit/coding-level"><img src="https://agentmods.dev/badge/skills/manhvann/codexkit/coding-level/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.
<a href="https://agentmods.dev/skills/manhvann/codexkit/coding-level"><img src="https://agentmods.dev/badge/skills/manhvann/codexkit/coding-level.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00016 | $0.00395 |
| Opus 5.5 | $0.00006 | $0.00158 |
| Sonnet 5.5 | $0.00003 | $0.00079 |
| Haiku 4.5 | $0.00002 | $0.00040 |
Grade A, and why
ck:coding-level 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.
What it actually says
Coding Level
Set your coding experience level for tailored explanations and output format.
Usage
$coding-level [0-5]
Levels
| Level | Name | Description |
|---|---|---|
| 0 | ELI5 | Zero coding experience - analogies, no jargon, step-by-step |
| 1 | Junior | 0-2 years - concepts explained, WHY not just HOW |
| 2 | Mid-Level | 3-5 years - design patterns, system thinking |
| 3 | Senior | 5-8 years - trade-offs, business context, architecture |
| 4 | Tech Lead | 8-10 years - risk assessment, business impact, strategy |
| 5 | God Mode | Expert - default behavior, maximum efficiency (default) |
How It Works
- Set
codingLevelin.codex/.ck.json - Guidelines are automatically injected on every session start
- No manual activation needed - it just works!
Example
Set level 1 in .codex/.ck.json:
{
"codingLevel": 1,
...
}
Next session, Codex will automatically:
- Explain concepts and techniques clearly
- Always explain WHY, not just HOW
- Point out common mistakes
- Add "Key Takeaways" after implementations
Optional: Manual Output Styles
For finer control, you can also use /output-style with these styles:
coding-level-0-eli5coding-level-1-juniorcoding-level-2-midcoding-level-3-seniorcoding-level-4-leadcoding-level-5-god
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.
- 1mo ago First seen · 57 lines · 16 tokens per session scan A 766bf64559b1
ck:coding-level is a skill published in the GitHub repository manhvann/codexkit (89 stars, last pushed 1mo ago), licensed MIT. It adds 16 tokens to every session and 395 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.
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