An interactive course for learning the GitHub Copilot command-line tool, which lets you use Copilot from a terminal. It provides lessons, quizzes, challenges, and a reference guide.

Use it to study Copilot CLI commands, test your knowledge, practise scenarios, or look up commands and settings.

It gives you a structured way to learn terminal commands and concepts instead of piecing them together from scattered documentation.

cli-mastery — Skill for Claude Code and Codex by boshi-xixixi

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 boshi-xixixi/TraeSkill --skill cli-mastery

Clone the repo

git clone --depth 1 https://github.com/boshi-xixixi/TraeSkill

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/boshi-xixixi/traeskill/cli-mastery/github.svg)](https://agentmods.dev/skills/boshi-xixixi/traeskill/cli-mastery)

Your own site

<a href="https://agentmods.dev/skills/boshi-xixixi/traeskill/cli-mastery"><img src="https://agentmods.dev/badge/skills/boshi-xixixi/traeskill/cli-mastery/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/boshi-xixixi/traeskill/cli-mastery"><img src="https://agentmods.dev/badge/skills/boshi-xixixi/traeskill/cli-mastery.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 52 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 537 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.

Model	Per session	Once invoked
Fable 5.1	$0.00052	$0.00537
Opus 5.5	$0.00021	$0.00215
Sonnet 5.5	$0.00010	$0.00107
Haiku 4.5	$0.00005	$0.00054

Measured 1mo ago against content hash d3e4194d69f9, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

cli-mastery 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 1mo 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

Copies of this mod

1 near-identical copy found in the catalogue:

cli-mastery — 100% identical, 0 lines differ

.trae/Skills/.agents/skills/cli-mastery/SKILL.md · 44 lines

What it actually says

Copilot CLI Mastery

UTILITY SKILL — interactive Copilot CLI trainer. INVOKES: ask_user, sql, view USE FOR: "cliexpert", "teach me the Copilot CLI", "quiz me on slash commands", "CLI cheat sheet", "copilot CLI final exam" DO NOT USE FOR: general coding, non-CLI questions, IDE-only features

Routing and Content

Trigger	Action
"cliexpert", "teach me"	Read next `references/module-N-*.md`, teach
"quiz me", "test me"	Read current module, 5+ questions via `ask_user`
"scenario", "challenge"	Read `references/scenarios.md`
"reference"	Read relevant module, summarize
"final exam"	Read `references/final-exam.md`

Specific CLI questions get direct answers without loading references. Reference files in references/ dir. Read on demand with view.

Behavior

On first interaction, initialize progress tracking:

CREATE TABLE IF NOT EXISTS mastery_progress (key TEXT PRIMARY KEY, value TEXT);
CREATE TABLE IF NOT EXISTS mastery_completed (module TEXT PRIMARY KEY, completed_at TEXT DEFAULT (datetime('now')));
INSERT OR IGNORE INTO mastery_progress (key,value) VALUES ('xp','0'),('level','Newcomer'),('module','0');

XP: lesson +20, correct +15, perfect quiz +50, scenario +30. Levels: 0=Newcomer 100=Apprentice 250=Navigator 400=Practitioner 550=Specialist 700=Expert 850=Virtuoso 1000=Architect 1150=Grandmaster 1500=Wizard. Max XP from all content: 1600 (8 modules × 145 + 8 scenarios × 30 + final exam 200).

When module counter exceeds 8 and user says "cliexpert", offer: scenarios, final exam, or review any module.

Rules: ask_user with choices for ALL quizzes/scenarios. Show XP after correct answers. One concept at a time; offer quiz or review after each lesson.

Files

What ships with it

10 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.

1mo ago First seen · 44 lines · 52 tokens per session scan A d3e4194d69f9

Subscribe to this mod's changes

cli-mastery is a skill published in the GitHub repository boshi-xixixi/TraeSkill (278 stars, last pushed 5mo ago), licensed MIT. It adds 52 tokens to every session and 537 once invoked, about $0.0002 per session on Opus 5.5. 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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