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 agentmods add skills/kyh/vibedgames/skill-creatornpx skills add kyh/vibedgames --skill skill-creatorgit clone --depth 1 https://github.com/kyh/vibedgamesWrote 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/kyh/vibedgames/skill-creator)<a href="https://agentmods.dev/skills/kyh/vibedgames/skill-creator"><img src="https://agentmods.dev/badge/skills/kyh/vibedgames/skill-creator.svg" alt="Measured on agentmods" height="20"></a>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 | $0.00062 | $0.02969 |
| Opus 5 | $0.00031 | $0.01484 |
| Sonnet 5 | $0.00012 | $0.00594 |
| Haiku 4.5 | $0.00006 | $0.00297 |
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 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.
How it starts
The opening of the file, as written. The whole thing — 495 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Skill Creator Plus
An advanced framework for creating skills that unlock AI agent capabilities rather than constraining them to templates.
Philosophy: Skills as Mental Frameworks
Skills are not checklists or templates—they are mental frameworks that guide creative problem-solving.
Core principle: Unlock vs. Constrain
| Constraining Approach | Unlocking Approach |
|---|---|
| Rigid templates | Flexible frameworks |
| Strict rules | Guiding principles |
| Fixed outputs | Varied, context-appropriate results |
| Limiting choices | Expanding possibilities |
| Checklists | Mental models |
The Three Pillars of Effective Skills
- Philosophy Before Procedure: Establish "how to think" before "what to do"
- Anti-Patterns as Guidance: What NOT to do is as important as what to do
- Variation as Requirement: Explicitly prevent output convergence
IMPORTANT: This skill exemplifies the principles it teaches. Study its structure as a reference pattern for philosophy-first design.
Before Creating a Skill
Ask these fundamental questions:
- Purpose: What procedural knowledge will this skill provide that the agent doesn't already have?
- Philosophy: What mental framework should guide decisions in this domain?
- Triggers: When should this skill be loaded? What specific use cases?
- Scope: Is this skill focused or trying to do too much?
- Composability: How will this work with other skills?
Good answers to these questions shape effective skills.
Skill Creation Process
1. Understand with Concrete Examples
Skip only when usage patterns are already clearly understood.
Gather examples of how the skill will be used:
- Direct examples from users
- Generated scenarios validated by users
- Real-world use cases
Key questions:
What ships with it
15 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.
- examples/annotated/frontend-design-analysis.md 14 KB
- examples/before-after/basic-to-effective.md 6.6 KB
- examples/before-after/procedural-to-philosophical.md 9.9 KB
- references/anti-patterns.md 8.8 KB
- references/composability.md 13 KB
- references/output-patterns.md 1.8 KB
- references/philosophy-patterns.md 12 KB
- references/variation-patterns.md 12 KB
- references/workflows.md 829 B
- scripts/_lib/asset-tools.mjs 31 KB runs code
- scripts/analyze-skill.mjs 2.8 KB runs code
- scripts/init-skill.mjs 1.7 KB runs code
- scripts/package-skill.mjs 3.3 KB runs code
- scripts/quick-validate.mjs 732 B runs code
- scripts/upgrade-skill.mjs 2.4 KB runs code
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.
- 2d ago Changed · +9 lines 44be4546ae84
- 6d ago First seen · 486 lines · 62 tokens per session scan A 460e0e954eab
skill-creator is a skill published in the GitHub repository kyh/vibedgames (55 stars, last pushed yesterday), licensed MIT. It adds 62 tokens to every session and 2,969 once invoked, about $0.0003 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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