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 artvepa80/Agents-Hefesto --skill skillgit clone --depth 1 https://github.com/artvepa80/Agents-HefestoWrote 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/artvepa80/agents-hefesto/skill)<a href="https://agentmods.dev/skills/artvepa80/agents-hefesto/skill"><img src="https://agentmods.dev/badge/skills/artvepa80/agents-hefesto/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/skills/artvepa80/agents-hefesto/skill"><img src="https://agentmods.dev/badge/skills/artvepa80/agents-hefesto/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 | $0.00198 |
| Opus 5.5 | $0.00000 | $0.00079 |
| Sonnet 5.5 | $0.00000 | $0.00040 |
| Haiku 4.5 | $0.00000 | $0.00020 |
Grade A, and why
skill 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 yesterday.
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
HefestoAI skill: moved
The HefestoAI agent skill moved to skills/hefestoai/
(name: hefestoai, following the Agent Skills specification).
Its reference docs (commands.md, issue_types.md, integration.md,
semantic_drift.md, reliability_drift.md and analysis/) moved with it.
The Hefesto Code Gate skills for Claude Code, Codex and Cursor now live in artvepa80/hefesto-code-gate (v1.0.0). Install in Claude Code:
/plugin marketplace add artvepa80/hefesto-code-gate
/plugin install hefesto-code-gate@hefestoai
Requires hefesto-ai>=4.20.3,<5.
What ships with it
11 files 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.
- analysis/fix_suggestions.md 2.5 KB
- analysis/hermes_integration.md 2.7 KB
- analysis/interpret_output.md 2.7 KB
- analysis/report_template.md 2.2 KB
- analysis/screenshot.md 1.7 KB
- analysis/SKILL.md 1.4 KB
- commands.md 5.8 KB
- integration.md 6.3 KB
- issue_types.md 6.1 KB
- reliability_drift.md 4.0 KB
- semantic_drift.md 3.3 KB
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.
- yesterday Changed · -53 lines · -62 tokens per session d98ac2f03176
- 3d ago Changed 31b3f468fd17
- 7d ago Changed 655e1bc686dd
- 8d ago Changed ced07acc9c6e
- 9d ago Changed d6d7308cd41e
- 10d ago Changed e45c7b49b4b9
- 11d ago Changed · +8 lines 3c4488a288fc
- 13d ago Changed 00038aec63c5
- 14d ago Changed 83b700cca41c
- 15d ago First seen · 63 lines · 62 tokens per session scan A 041584378a1a
skill is a skill published in the GitHub repository artvepa80/Agents-Hefesto (7 stars, last pushed today), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 198 tokens. 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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