Hermes Agent is an AI assistant that learns from its use by creating and improving skills, retaining knowledge, searching past conversations, and adapting to its users. It is for people who want to run an agent through a terminal or messaging platforms while connecting it to different AI models and scheduled tasks.
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 NousResearch/hermes-agent --skill hermes-agent-skill-authoringgit clone --depth 1 https://github.com/NousResearch/hermes-agentWrote 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/nousresearch/hermes-agent/hermes-agent-skill-authoring)<a href="https://agentmods.dev/skills/nousresearch/hermes-agent/hermes-agent-skill-authoring"><img src="https://agentmods.dev/badge/skills/nousresearch/hermes-agent/hermes-agent-skill-authoring/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/nousresearch/hermes-agent/hermes-agent-skill-authoring"><img src="https://agentmods.dev/badge/skills/nousresearch/hermes-agent/hermes-agent-skill-authoring.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk pass
- NVIDIA SkillSpector warn
SkillSpector: 2 findings, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Rogue Agent · line 41 Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.Fix: Remove any persistence mechanisms (cron jobs, startup scripts, state files). Skills should not maintain state across sessions without explicit user consent.
- medium Rogue Agent · line 110 Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.Fix: Remove any persistence mechanisms (cron jobs, startup scripts, state files). Skills should not maintain state across sessions without explicit user consent.
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 | $0.00022 | $0.03575 |
| Opus 5 | $0.00011 | $0.01788 |
| Sonnet 5 | $0.00004 | $0.00715 |
| Haiku 4.5 | $0.00002 | $0.00358 |
Grade A, and why
hermes-agent-skill-authoring 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 7d 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.
Copies of this mod
2 near-identical copies found in the catalogue:
- hermes-agent-skill-authoring — 100% identical, 0 lines differ
- hermes-agent-skill-authoring — 100% identical, 2 lines differ
How it starts
The opening of the file, as written. The whole thing — 213 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Authoring Hermes-Agent Skills (in-repo)
Overview
There are two places a SKILL.md can live:
- User-local:
~/.hermes/skills/<maybe-category>/<name>/SKILL.md— personal, not shared. Created viaskill_manage(action='create'). - In-repo (this skill is about this case):
skills/<category>/<name>/SKILL.mdoroptional-skills/<category>/<name>/SKILL.mdinside the hermes-agent repo — committed, shipped with the package. Usewrite_file+git add.skill_manage(action='create')does NOT target this tree.
In-repo skills must meet the repo's hardline authoring standards (see AGENTS.md, "Skill authoring standards (HARDLINE)" — that section is the source of truth; this skill is the operational walkthrough). Reviewers reject PRs that violate them, so meeting them up front is cheaper than a salvage pass later.
When to Use
- User asks you to add a skill "in this branch / repo / commit"
- You're committing a reusable workflow that should ship with hermes-agent
- You're editing an existing skill under
skills/oroptional-skills/(usepatchfor small edits,write_filefor rewrites;skill_managestill works for patch on in-repo skills, but not forcreate) - Don't use for: personal skills in
~/.hermes/skills/(just useskill_manage)
Decide the Tier First: Bundled vs Optional
- Bundled (
skills/<category>/) — daily-driver behavior, broadly useful across many user types, low footprint. Hard bar: you can say "a user will load this in 5+ sessions per month" with a straight face. - Optional (
optional-skills/<category>/) — niche, vertical-specific (blockchain, gaming, finance, one app), recurring-job/task skills, or anything heavy. Installed viahermes skills install official/<category>/<skill>.
When in doubt, optional. Promoting later is easy; demoting is churn. "Would be useful to anyone who ever needs this" is an optional-tier argument, not a bundled one.
Pick the category by what the tool IS, not what it feels like (an AI-agent CLI goes in autonomous-ai-agents/ even if it "feels productivity"). Confirm existing categories with search_files(pattern='*', target='files', path='skills') and don't invent new top-level categories casually.
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.
- 7d ago First seen · 213 lines · 22 tokens per session scan A 3a274d5b42fa
hermes-agent-skill-authoring is a skill published in the GitHub repository NousResearch/hermes-agent (244,059 stars, last pushed today), licensed MIT. It adds 22 tokens to every session and 3,575 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 2026-09-03.
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