hermes-agent-skill-authoring

hermes-agent-skill-authoring is a skill for Claude Code, Codex from sairam0424/MindForge. It costs 23 tokens per session (1,801 once invoked), scanned A, a copy of hermes-agent-skill-authoring, MIT.

A guide for writing repository-based SKILL.md files, including their required metadata, structure, and validation rules.

In plain words
What is it for?
Use it to add or edit a skill inside a code repository and prepare it for validation and sharing with the project.
Why use it?
It prevents reusable agent skills from being rejected because their file format, name, description, or content is invalid.

Skill for Claude CodeCodex

Which agent this was written for is unclear — built for hermes-agent. Also seen: built for hermes-agent.

Good fit Use it to add or edit a skill inside a code repository and prepare it for validation and sharing with the project.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/sairam0424/mindforge/skill-authoring
Install

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.

Any agent
npx skills add sairam0424/MindForge --skill skill-authoring
Clone the repo
git clone --depth 1 https://github.com/sairam0424/MindForge

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for hermes-agent-skill-authoring

README.md
[![agentmods](https://agentmods.dev/badge/skills/sairam0424/mindforge/skill-authoring/github.svg)](https://agentmods.dev/skills/sairam0424/mindforge/skill-authoring)
Your own site
<a href="https://agentmods.dev/skills/sairam0424/mindforge/skill-authoring"><img src="https://agentmods.dev/badge/skills/sairam0424/mindforge/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.

agentmods 80×15 button for hermes-agent-skill-authoring

Your own site · 80×15
<a href="https://agentmods.dev/skills/sairam0424/mindforge/skill-authoring"><img src="https://agentmods.dev/badge/skills/sairam0424/mindforge/skill-authoring.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 23 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,801 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin 86% copy Near-identical to another mod in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00023 $0.01801
Opus 5 $0.00012 $0.00901
Sonnet 5 $0.00005 $0.00360
Haiku 4.5 $0.00002 $0.00180

Measured 6d ago against content hash 05949d39c849, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

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 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.

Origin

This is a copy

86% identical to hermes-agent-skill-authoring — 32 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.agent/skills/skill-authoring/SKILL.md · 159 lines

How it starts

The opening of the file, as written. The whole thing — 159 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Authoring

Overview

There are two places a SKILL.md can live:

  1. User-local: ~/.agent/skills/<maybe-category>/<name>/SKILL.md — personal, not shared. Created via skill_manage(action='create').
  2. In-repo (this skill is about this case): `/home/bb/

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
  • You're editing an existing skill under `/home/bb/

Required Frontmatter

Source of truth: tools/skill_manager_tool.py::_validate_frontmatter. Hard requirements:

  • Starts with --- as the first bytes (no leading blank line).
  • Closes with \n---\n before the body.
  • Parses as a YAML mapping.
  • name field present.
  • description field present, ≤ 1024 chars (MAX_DESCRIPTION_LENGTH).
  • Non-empty body after the closing ---.

Peer-matched shape used by every skill under skills/software-development/:

---
name: my-skill-name               # lowercase, hyphens, ≤64 chars (MAX_NAME_LENGTH)
description: Use when <trigger>. <one-line behavior>.
version: 1.0.0
author: 
license: MIT
metadata:
  hermes:
    tags: [short, descriptive, tags]
    related_skills: [other-skill, another-skill]
---

version / author / license / metadata are NOT enforced by the validator, but every peer has them — omit and your skill sticks out.

Size Limits

  • Description: ≤ 1024 chars (enforced).
  • Full SKILL.md: ≤ 100,000 chars (enforced as MAX_SKILL_CONTENT_CHARS, ~36k tokens).
  • Peer skills in software-development/ sit at 8-14k chars. Aim for that range. If you're pushing past 20k, split into references/*.md and reference them from SKILL.md.

Peer-Matched Structure

Every in-repo skill follows roughly:

# <Title>

## Overview
One or two paragraphs: what and why.

## When to Use
- Bulleted triggers
- "Don't use for:" counter-triggers

## <Topic sections specific to the skill>
- Quick-reference tables are common
- Code blocks with exact commands
- the agent-specific recipes (tests via scripts/run_tests.sh, ui-tui paths, etc.)

## Common Pitfalls
Numbered list of mistakes and their fixes.

## Verification Checklist
- [ ] Checkbox list of post-action verifications

## One-Shot Recipes (optional)
Named scenarios → concrete command sequences.

Read the full file on GitHub · 159 lines

Changes

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.

  1. 6d ago First seen · 159 lines · 23 tokens per session scan A 05949d39c849

Subscribe to this mod's changes

hermes-agent-skill-authoring is a skill published in the GitHub repository sairam0424/MindForge (0 stars, last pushed today), licensed MIT. It adds 23 tokens to every session and 1,801 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 86% identical to hermes-agent-skill-authoring, differing in 32 lines, and is treated as a copy.

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