Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/hackermanishackerman/claude-skills-vaultnpx agentmods add commands/hackermanishackerman/claude-skills-vault/create-skillWrote 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/commands/hackermanishackerman/claude-skills-vault/create-skill)<a href="https://agentmods.dev/commands/hackermanishackerman/claude-skills-vault/create-skill"><img src="https://agentmods.dev/badge/commands/hackermanishackerman/claude-skills-vault/create-skill/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/commands/hackermanishackerman/claude-skills-vault/create-skill"><img src="https://agentmods.dev/badge/commands/hackermanishackerman/claude-skills-vault/create-skill.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 | $0.00000 | $0.01537 |
| Opus 5.5 | $0.00000 | $0.00615 |
| Sonnet 5.5 | $0.00000 | $0.00307 |
| Haiku 4.5 | $0.00000 | $0.00154 |
Grade A, and why
create-skill scanned grade A with 1 finding 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.
Runs shell commandslowCapability
Expected in a hook, worth knowing in a rule or an instructions file.
result = subprocess.run( This is a copy
100% identical to create-skill — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 252 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Create Skill Command
Goal: Create production-ready skills w/ validation, testing & optimization.
1. Required Skills
Use these skills during creation:
| Skill | Path | Purpose |
|---|---|---|
skill-creator |
.claude/skills/skill-creator/ |
Core creation workflow |
token-formatter |
.claude/skills/token-formatter/ |
Compress SKILL.md content |
md |
.claude/skills/document-skills/md/ |
Clean markdown w/o errors |
2. Creation Flow
Step 1: Understand Requirements
Ask user:
- "What should this skill do?"
- "Example usage scenarios?"
- "Any scripts/assets needed?"
Step 2: Init Skill
python scripts/init_skill.py <skill-name> --path .claude/skills/<skill-name>
Creates:
skill-name/
├── SKILL.md
├── scripts/
├── references/
└── assets/
Step 3: Plan Resources
Analyze examples → identify:
| Resource | When |
|---|---|
scripts/ |
Repeated code, deterministic tasks |
references/ |
Docs, schemas, API specs |
assets/ |
Templates, images, fonts |
Step 4: Write Content
SKILL.md rules:
- YAML frontmatter:
name&description(req) - Imperative form ("To do X" not "You should")
- Keep lean → move details to
references/ - Apply
token-formattercompression
Writing style:
# Skill Name
Brief purpose (1-2 sentences).
## When to Use
Invoke when:
- Condition 1
- Condition 2
## Process
1. Step one
2. Step two
Step 5: Optimize
Apply token-formatter:
- Abbreviations: fn, str, num, config, auth, db, etc.
- Remove filler words
- Compress tables & lists
- Use symbols:
→,|,&,w/,w/o
Apply md skill:
- Proper fence nesting (use ```` for outer)
- Match opening/closing fences
- Escape
|in tables - Consistent list indentation
- Blank lines around code blocks
3. Testing (REQUIRED)
Test Location
tests/<skill-name>/
├── test_*.py # Python tests
├── test_*.sh # Bash tests
├── fixtures/ # Test data
└── expected/ # Expected outputs
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 · 252 lines · 0 tokens per session scan A 9c4567a42dcf
create-skill is a command published in the GitHub repository hackermanishackerman/claude-skills-vault (2 stars, last pushed 6d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 1,537 tokens. A static security scan graded it A with 1 finding (runs shell commands). It is 100% identical to create-skill, differing in 0 lines, and is treated as a copy.
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filter-log
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commit-claude-config
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deploy
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database-setup
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interaction-designer
Use when deciding how something should behave rather than how it looks. Click and tap targets, gestures, keyboard paths, loading and empty and error states, and the feedback each action gives.