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 agentmods add skills/sergeyklay/.agents/make-skillnpx skills add sergeyklay/.agents --skill make-skillgit clone --depth 1 https://github.com/sergeyklay/.agentsWrote 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/sergeyklay/.agents/make-skill)<a href="https://agentmods.dev/skills/sergeyklay/.agents/make-skill"><img src="https://agentmods.dev/badge/skills/sergeyklay/.agents/make-skill.svg" alt="Measured on agentmods" 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 | $0.00084 | $0.05340 |
| Opus 5 | $0.00042 | $0.02670 |
| Sonnet 5 | $0.00017 | $0.01068 |
| Haiku 4.5 | $0.00008 | $0.00534 |
Grade A, and why
make-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 2d 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.
How it starts
The opening of the file, as written. The whole thing — 321 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Creating Agent Skills
Author Agent Skills against the agentskills.io specification. A skill is a self-contained directory of instructions, scripts, and resources that turns a general-purpose agent into a specialist for one focused domain.
Core Philosophy
Context is shared. Your skill's tokens compete with the system prompt, conversation history, other skills, and the user's request. Once SKILL.md loads it stays in context for the rest of the turn. Every line must earn its place.
The agent is already smart. Add only context it lacks. Cut explanations of well-known concepts (PDFs, for-loops, HTTP, JSON) and any sentence whose absence would not confuse a competent agent.
Reason over command. Prefer "Use pdfplumber because it handles multi-column layouts and rotated text better than alternatives" to "ALWAYS use pdfplumber". The reasoning becomes the rubric for cases the skill did not anticipate.
Write for the agent, not the human reader. The audience is an LLM ingesting tokens, not a person browsing a wiki page. Optimize for density and clarity, not visual aesthetics. Visual decoration — hard wraps that imply meaningful line breaks, blockquotes around examples, redundant "why this works" paragraphs after every code block, three-deep ladders of indented bullets, decorative Tip:/Note: wrappers around single sentences — costs tokens and earns nothing. See references/writing-patterns.md § Density for dense-vs-decorative examples.
Skill Anatomy
skill-name/
├── SKILL.md # required: YAML frontmatter + markdown body
├── scripts/ # optional: executable code; output enters context
├── references/ # optional: docs loaded on demand
└── assets/ # optional: templates, schemas, images
Only SKILL.md is required. Drop empty directories.
Running scripts bundled with this skill
Script paths are resolved relative to this SKILL.md, not the agent's CWD. If a relative command fails, prefix it with the directory the platform loaded SKILL.md from.
What ships with it
5 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.
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.
- 2d ago Changed · +2 lines df31b72a5608
- 5d ago First seen · 319 lines · 84 tokens per session scan A b0bfe3bfa48d
make-skill is a skill published in the GitHub repository sergeyklay/.agents (5 stars, last pushed today), licensed Apache-2.0. It adds 84 tokens to every session and 5,340 once invoked, about $0.0004 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 2026-08-31.
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