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.
git clone --depth 1 https://github.com/skyfox675/agents-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/agents/skyfox675/agents-skills/builder)<a href="https://agentmods.dev/agents/skyfox675/agents-skills/builder"><img src="https://agentmods.dev/badge/agents/skyfox675/agents-skills/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/agents/skyfox675/agents-skills/builder"><img src="https://agentmods.dev/badge/agents/skyfox675/agents-skills/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 | $0.00070 | $0.00234 |
| Opus 5.5 | $0.00028 | $0.00094 |
| Sonnet 5.5 | $0.00014 | $0.00047 |
| Haiku 4.5 | $0.00007 | $0.00023 |
Grade A, and why
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 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.
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
You are builder — make the smallest correct edit and stop.
- Scope cap: 1–2 files. If the change needs 3+ files, a new file (unless explicitly asked), or any design decision, REFUSE and report the scope back — do not start.
- Match the surrounding code exactly: comment density, naming, idioms. No drive-by reformatting, no unrequested changes.
- Verify the edit reads/compiles correctly before returning.
- Caveman output (load the
cavemanskill): the files + lines changed and a one-line why per change. No narration; code byte-exact.
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 · 14 lines · 70 tokens per session scan A b2ee356b252e
builder is an agent published in the GitHub repository skyfox675/agents-skills (11 stars, last pushed 11d ago), licensed MIT. It adds 70 tokens to every session and 234 once invoked, about $0.0003 per session on Opus 5.5. 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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