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 open-octo/octo-agent --skill skill-creatorgit clone --depth 1 https://github.com/open-octo/octo-agentWrote 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/open-octo/octo-agent/skill-creator)<a href="https://agentmods.dev/skills/open-octo/octo-agent/skill-creator"><img src="https://agentmods.dev/badge/skills/open-octo/octo-agent/skill-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.
<a href="https://agentmods.dev/skills/open-octo/octo-agent/skill-creator"><img src="https://agentmods.dev/badge/skills/open-octo/octo-agent/skill-creator.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Rogue Agent · line 4 Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.Fix: Remove any persistence mechanisms (cron jobs, startup scripts, state files). Skills should not maintain state across sessions without explicit user consent.
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 | $0.00123 | $0.01640 |
| Opus 5 | $0.00062 | $0.00820 |
| Sonnet 5 | $0.00025 | $0.00328 |
| Haiku 4.5 | $0.00012 | $0.00164 |
Grade A, and why
skill-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.
How it starts
The opening of the file, as written. The whole thing — 189 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Skill Creator
A skill for creating and iteratively improving skills.
The Skill Lifecycle
- Capture intent — understand what the skill should do and when it should trigger
- Write a draft — compose the SKILL.md with frontmatter + instructions
- Test it — run realistic prompts through the skill and evaluate the results
- Iterate — rewrite based on feedback and test again
- Polish — optimize the description for triggering accuracy
Your job is to figure out where the user is in this process and help them progress.
Communicating with the user
Pay attention to context cues. Not every user is a programmer — some may be using octo for the first time. Briefly explain terms if you're in doubt.
Creating a skill
Capture Intent
Start by understanding the user's intent. The current conversation may already contain a workflow they want to capture.
Ask:
- What should this skill enable octo to do?
- When should this skill trigger? (what user phrases / contexts)
- What's the expected output format?
- Should we set up test cases? Skills with objectively verifiable outputs (file transforms, code generation, fixed workflow steps) benefit from tests. Skills with subjective outputs (writing style, creative tasks) often don't.
Interview and Research
Proactively ask about edge cases, input/output formats, example files, success criteria, and dependencies.
Check available skills and tools — if useful for research, use subagents to search docs or find similar skills in parallel.
Where the skill lives
A skill is a directory holding a SKILL.md under ~/.octo/skills/<name>/SKILL.md —
available in every session, regardless of which project you're working in.
octo skills add and the web Skills panel install here.
Write the SKILL.md
The format is a SKILL.md with YAML frontmatter:
---
name: my-skill
description: When to trigger, what it does. Be specific — include both what the skill does AND the contexts where it should be used. Make descriptions slightly "pushy" to combat undertriggering.
---
# Title
Instructions go here...
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.
- 10d ago First seen · 189 lines · 123 tokens per session scan A 561f0857e006
skill-creator is a skill published in the GitHub repository open-octo/octo-agent (97 stars, last pushed yesterday), licensed MIT. It adds 123 tokens to every session and 1,640 once invoked, about $0.0006 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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