skill-authoring

skill-authoring is a skill for Claude Code, Codex from aristoteleo/awesome-skill-generate. It costs 69 tokens per session (4,832 once invoked), scanned A, original, BSD-2-Clause.

A guide for creating or updating Codex skills, which package repeatable work into reusable instructions, scripts, references, and assets.

In plain words
What is it for?
It helps design skill instructions, choose what belongs in scripts or references, and check that documented interfaces match the real code.
Why use it?
It helps turn a one-off procedure or analysis into a consistent workflow that other agents can use.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions Codex.

Not installable: its command points at a path on the author’s own machine, so it runs nowhere else. The line is /Users/alice/.../dynamo/preprocessing/Preprocessor.py.

Good fit It helps design skill instructions, choose what belongs in scripts or references, and check that documented interfaces match the real code.

Compare 6 skills from other repositories ↓
Install

Getting it into your agent

There is no command for this one: it runs only inside a plugin, and the catalogue could not identify which plugin ships it. The source is linked below.

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 skill-authoring

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

Your own site · 80×15
<a href="https://agentmods.dev/skills/aristoteleo/awesome-skill-generate/skill-authoring"><img src="https://agentmods.dev/badge/skills/aristoteleo/awesome-skill-generate/skill-authoring.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 69 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,832 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 original No closer match found 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 $0.00069 $0.04832
Opus 5 $0.00034 $0.02416
Sonnet 5 $0.00014 $0.00966
Haiku 4.5 $0.00007 $0.00483

Measured 12d ago against content hash a0e978375db7, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

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 12d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/inspect_python_interface.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

skills/skill-authoring/SKILL.md · 540 lines

How it starts

The opening of the file, as written. The whole thing — 540 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Skill Creator

Create skills that are short, reusable, and biased toward execution.

Core Rules

  1. Optimize for another agent using the skill, not for a human reading documentation.
  2. Keep SKILL.md small. Put details into references/, deterministic logic into scripts/, and templates into assets/.
  3. Put trigger conditions in frontmatter description, not in the body.
  4. Prefer procedures and selection rules over long explanations.
  5. Source-ground every interface-specific claim against real code, help(...), or -h/--help before writing it into the skill.
  6. Include only information another agent is unlikely to infer reliably from general knowledge.
  7. Default to capability-first naming. Do not let a sample dataset, species, notebook title, or one published figure become the skill identity unless the workflow is truly specific to that artifact.
  8. In generated skill documentation, prefer repo-relative paths or import paths. Do not bake local absolute source-code paths from one machine into SKILL.md or references/.
  9. Keep reusable skill content environment-agnostic. Do not encode local environment names such as omictest into SKILL.md or references/; if local validation depends on them, keep that only in the review harness, acceptance harness, or calling prompt.
  10. Treat local validation configuration as review-harness data, not as part of the reusable skill itself.
  11. Do not generate a scripts/ directory by default. Add scripts only when they carry reusable deterministic logic or a necessary bounded smoke utility that would otherwise make the skill less reliable.

Skill Shape

Each skill should follow this structure:

skill-name/
├── SKILL.md
├── scripts/        # executable helpers for repeated or fragile steps
├── references/     # selectively loaded reference material
└── assets/         # templates, starter files, static resources

Use only the folders that are needed. Do not add extra docs like README.md, CHANGELOG.md, or process notes.

Read the full file on GitHub · 540 lines

Files

What ships with it

3 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.

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. 12d ago First seen · 540 lines · 69 tokens per session scan A a0e978375db7

Subscribe to this mod's changes

skill-authoring is a skill published in the GitHub repository aristoteleo/awesome-skill-generate (11 stars, last pushed 5mo ago), licensed BSD-2-Clause. It adds 69 tokens to every session and 4,832 once invoked, about $0.0003 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 2026-08-30.

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