skill

skill is a command for coding agents from j4flmao/agent-skills. It costs 0 tokens per session (128 once invoked), scanned A, original, MIT.

A command that loads a named skill by reading its SKILL.md file and any supporting reference files. A skill is a set of instructions for handling a particular kind of task.

In plain words
What is it for?
Use it to activate skills such as NestJS architecture, API responses, or iOS development by name.
Why use it?
It gives the agent the right task-specific rules without requiring those instructions to be loaded for every task.

Command

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.

agentmods
npx agentmods add commands/j4flmao/agent-skills/skill
Clone the repo
git clone --depth 1 https://github.com/j4flmao/agent-skills

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

README.md
[![agentmods](https://agentmods.dev/badge/commands/j4flmao/agent-skills/skill.svg)](https://agentmods.dev/commands/j4flmao/agent-skills/skill)
Your own site
<a href="https://agentmods.dev/commands/j4flmao/agent-skills/skill"><img src="https://agentmods.dev/badge/commands/j4flmao/agent-skills/skill.svg" alt="Measured on agentmods" height="20"></a>
Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 128 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00000 $0.00128
Opus 5 $0.00000 $0.00064
Sonnet 5 $0.00000 $0.00026
Haiku 4.5 $0.00000 $0.00013

Measured 4d ago against content hash c748894d6990, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

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 4d 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.

.opencode/commands/skill.md · 25 lines

What it actually says

/skill — Load a skill by name

Activate a skill from the suite. Reads the skill's SKILL.md and applies its rules.

Usage

/skill <name>
/skill nestjs-architecture
/skill api-response
/skill ios

Resolution

  1. Match name: field in skills/**/SKILL.md
  2. Read SKILL.md content
  3. Load reference files from references/ directory
  4. Follow skill's Agent Protocol

Output

Activated: {name}
Description: {description}
References: {N} files
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. 4d ago First seen · 25 lines · 0 tokens per session scan A c748894d6990

Subscribe to this mod's changes

skill is a command published in the GitHub repository j4flmao/agent-skills (20 stars, last pushed yesterday), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 128 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 2026-08-30.