Home / Skills / subagent-brief

subagent-brief

Use BEFORE invoking the Task or Agent tool to spawn a subagent. Anthropic does NOT share prefix cache across subagents — every subagent cold-starts and re-tokenizes its full prompt (system prompt + tool definitions + the context you handed it). Spawning N subagents with full context = N× token cost; a single fan-out can burn an entire Max-plan day. This skill enforces a pre-flight discipline: compress every subagent prompt into a ≤200-word brief before spawning. Triggers when the agent is about to call Task / Agent tool, especially with long files, full repo dumps, or N parallel subagents on s

ScannedSkillSource: Gemini CLI extensions gallery

232 stars Updated 5mo ago License MIT Context ≈154 tokens always loaded

52popular

Why this score

Stars

10/35

Usage (forks)

2/15

Upkeep

15/25

License

15/15

Owner history

10/10

This repo hosts 10 skills, so its 232 stars are split between them (about 23 each) for scoring.

Popularity score: 52/100 from public GitHub signals only. It shows how widely used and maintained this is, not how well it works. Not included yet: the fake-star check. The security scan is shown separately and doesn't change the score. How we rank

Security

Scanned Oct 21, 2026 at commit ebbc355b6db9, with Cisco's open-source skill-scanner.

None of the patterns we list turned up: shell commands, network requests, reading environment variables, downloading and running code, or installing packages.

A scan lists patterns in the code. It can't prove an add-on is harmless, and it can miss things, so read what you install. How we scan

Alternatives

Other makers' add-ons that do the same job, next to this one.

Name	Score	Stars	Context	Updated
This onesubagent-brief LichAmnesia/lich-skills · Skill	52	★ 232	≈154 always	5mo ago
visual-brief pchalasani/claude-code-tools · Skill Both about brief	71	★ 2.0k	≈22 always	16d ago
design-brief julianoczkowski/designer-skills · Skill Both about brief	57	★ 591	≈70 always	4mo ago
company-brief EodHistoricalData/eodhd-claude-skills · Skill Both about brief	56	★ 46	≈21 always	16d ago
promo-brief kangarooking/promo-creator-skills · Skill Both about brief	51	★ 109	≈27 always	6mo ago
blog-brief AgriciDaniel/claude-blog · Skill Both about brief	74	★ 2.4k	≈22 always	21d ago

Install

mkdir -p .claude/skills/subagent-brief

curl -sL https://codeload.github.com/LichAmnesia/lich-skills/tar.gz/ebbc355b6db90b445649efba9a58022d049c9ee2 | tar -xz -C .claude/skills/subagent-brief --strip-components=3 "lich-skills-ebbc355b6db90b445649efba9a58022d049c9ee2/skills/subagent-brief"

To remove it later:

rm -rf .claude/skills/subagent-brief

npx skills add LichAmnesia/lich-skills --skill subagent-brief

gemini extensions install https://github.com/LichAmnesia/lich-skills --ref=ebbc355b6db90b445649efba9a58022d049c9ee2

Pinned to commit ebbc355b6db9 as listed by Gemini CLI extensions gallery.

Context cost: ≈154 tokens loaded every session (name and description), plus ≈1.6k tokens when the skill is used.

The Claude Code command downloads this skill folder at the pinned commit into .claude/skills/. The Skills CLI (npx skills) works with many agents but can't pin a version, so it installs whatever is current.

Used for

Travel & hospitality

Facts

Repo: LichAmnesia/lich-skills
Stars: 232
Forks: 26
Last push: 2026-06-09 (5mo ago)
License: MIT
Owner: LichAmnesia · since 2013
Language: TypeScript
Works with: Claude Code, Skills CLI, Gemini CLI