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 TeamDzX/myllm-skills --skill regex-buildergit clone --depth 1 https://github.com/TeamDzX/myllm-skillsWrote 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/teamdzx/myllm-skills/regex-builder)<a href="https://agentmods.dev/skills/teamdzx/myllm-skills/regex-builder"><img src="https://agentmods.dev/badge/skills/teamdzx/myllm-skills/regex-builder/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/teamdzx/myllm-skills/regex-builder"><img src="https://agentmods.dev/badge/skills/teamdzx/myllm-skills/regex-builder.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 | $0.00028 | $0.00234 |
| Opus 5 | $0.00014 | $0.00117 |
| Sonnet 5 | $0.00006 | $0.00047 |
| Haiku 4.5 | $0.00003 | $0.00023 |
Grade A, and why
regex-builder scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 10d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
Regex builder
Produce a regular expression that matches what the user described.
Output:
- The pattern in a code block:
<regex> - How it works — break the pattern into parts and explain each in one line.
- Matches — 2–3 example strings it accepts.
- Doesn't match — 2–3 it rejects.
Rules:
- State the flavour (JavaScript, PCRE, Python
re, …); default to JavaScript and say so. Note any flags (e.g.i,g,m). - Keep it as simple as possible — readable beats clever. Anchor with
^/$when the whole string must match. - Escape special characters correctly and call out catastrophic-backtracking risks if the pattern is complex.
- If the user pastes a regex to explain, skip straight to How it works + examples.
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 · 26 lines · 28 tokens per session scan A bfdc18f93db7
regex-builder is a skill published in the GitHub repository TeamDzX/myllm-skills (2 stars, last pushed 1mo ago), licensed MIT. It adds 28 tokens to every session and 234 once invoked, about $0.0001 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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