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/dhaupin/vant/vant-skill-regexnpx skills add dhaupin/vant --skill vant-skill-regexgit clone --depth 1 https://github.com/dhaupin/vantWrote 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/dhaupin/vant/vant-skill-regex)<a href="https://agentmods.dev/skills/dhaupin/vant/vant-skill-regex"><img src="https://agentmods.dev/badge/skills/dhaupin/vant/vant-skill-regex.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 | $0.00005 | $0.00276 |
| Opus 5 | $0.00003 | $0.00138 |
| Sonnet 5 | $0.00001 | $0.00055 |
| Haiku 4.5 | $0.00001 | $0.00028 |
Grade A, and why
regex 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 6d 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
Regex
Pattern matching.
When To Use
- Find patterns
- Validate input
- Extract data
What To Do
1. Basics
| Pattern | What |
|---|---|
| . | Any character |
| * | 0 or more |
| + | 1 or more |
| ? | 0 or 1 |
| ^ | Start |
| $ | End |
2. Classes
[abc] # a, b, or c
[^abc] # not a, b, c
[a-z] # a to z
\d # digit
\w # word
\s # space
3. Groups
(abc) # Capture
(?:abc) # Non-capture
(?<name>abc) # Named
4. Use
const match = str.match(/\d+/g)
const valid = /^\S+@\S+\.\S+$/.test(email)
Role: Regex Developer
Input: String + pattern
Output: Match
Patterns.
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.
- 6d ago First seen · 69 lines · 5 tokens per session scan A 522991630b84
regex is a skill published in the GitHub repository dhaupin/vant (9 stars, last pushed 6d ago), licensed MIT. It adds 5 tokens to every session and 276 once invoked, about $0.0000 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 2026-08-31.
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