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 bengous/claude-code-plugins --skill excellence-skill-creatorgit clone --depth 1 https://github.com/bengous/claude-code-pluginsWrote 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/bengous/claude-code-plugins/excellence-skill-creator)<a href="https://agentmods.dev/skills/bengous/claude-code-plugins/excellence-skill-creator"><img src="https://agentmods.dev/badge/skills/bengous/claude-code-plugins/excellence-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/bengous/claude-code-plugins/excellence-skill-creator"><img src="https://agentmods.dev/badge/skills/bengous/claude-code-plugins/excellence-skill-creator.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00086 | $0.02966 |
| Opus 5 | $0.00043 | $0.01483 |
| Sonnet 5 | $0.00017 | $0.00593 |
| Haiku 4.5 | $0.00009 | $0.00297 |
Grade A, and why
excellence-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 8d 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 — 313 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Design-excellence skills transform Claude from a generic pattern-matcher into an opinionated craftsperson. A skill without strong opinions is just documentation with delusions of grandeur.
The user provides a domain (e.g., "API design", "error messages", "database schemas") and context about what makes generic output unacceptable. If they can't articulate why generic output fails, help them find that angle first—it's the foundation of everything that follows.
<excellence_philosophy>
Philosophy: What Makes a Design-Excellence Skill
A design-excellence skill without these five traits is just documentation pretending to have opinions:
-
Force intentional choices: Make Claude commit to a direction before touching the keyboard. Intentional choices produce distinctive output; default choices produce forgettable output.
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Encode taste, not just rules: Rules tell you what's legal. Taste tells you what's good. Your skill transmits the judgment of someone who has failed enough times to know what actually matters.
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Name the anti-patterns: Claude knows thousands of patterns. Tell it which ones are tired, overused, or inappropriate for this context. The anti-patterns block is often the most valuable section—it's where your hard-won experience becomes actionable guidance.
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Define done: Success criteria prevent the "good enough" trap. If you can't measure it, Claude will satisfice. Measurable outcomes distinguish excellent from adequate.
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Match complexity to context: A TODO app doesn't need microservices. A landing page doesn't need a design system. A skill that over-engineers simple cases teaches Claude to over-engineer everything.
If your skill reads like it could have been written by anyone, it will produce output that could have been written by anyone. Encode your opinions explicitly. </excellence_philosophy>
<excellence_workflow>
Workflow: Scaffold → Craft → Audit
This skill orchestrates a 3-pass workflow for maximum skill quality.
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.
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.
- 8d ago First seen · 313 lines · 86 tokens per session scan A ec6a595abd6d
excellence-skill-creator is a skill published in the GitHub repository bengous/claude-code-plugins (4 stars, last pushed yesterday), licensed MIT. It adds 86 tokens to every session and 2,966 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 2026-09-03.
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