cc-second-brain

cc-second-brain is a skill for Claude Code, Codex from mathruffian-dot/claude-code-lazy-packs. It costs 30 tokens per session (169 once invoked), scanned A, original, MIT.

A three-layer note system for Claude Code that organizes daily notes, working material, and lasting knowledge in an existing vault.

In plain words
What is it for?
It helps create the folder structure, add missing guidance notes, record the vault path in CLAUDE.md, and review notes weekly.
Why use it?
It reduces the mess of keeping notes in one place by giving each note type a home and a regular cleanup routine.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions CLAUDE.md; mentions Claude Code.

Good fit It helps create the folder structure, add missing guidance notes, record the vault path in CLAUDE.md, and review notes weekly.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/mathruffian-dot/claude-code-lazy-packs/04-second-brain
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 mathruffian-dot/claude-code-lazy-packs --skill 04-second-brain
Clone the repo
git clone --depth 1 https://github.com/mathruffian-dot/claude-code-lazy-packs

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 cc-second-brain

README.md
[![agentmods](https://agentmods.dev/badge/skills/mathruffian-dot/claude-code-lazy-packs/04-second-brain/github.svg)](https://agentmods.dev/skills/mathruffian-dot/claude-code-lazy-packs/04-second-brain)
Your own site
<a href="https://agentmods.dev/skills/mathruffian-dot/claude-code-lazy-packs/04-second-brain"><img src="https://agentmods.dev/badge/skills/mathruffian-dot/claude-code-lazy-packs/04-second-brain/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 cc-second-brain

Your own site · 80×15
<a href="https://agentmods.dev/skills/mathruffian-dot/claude-code-lazy-packs/04-second-brain"><img src="https://agentmods.dev/badge/skills/mathruffian-dot/claude-code-lazy-packs/04-second-brain.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 30 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 169 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. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00030 $0.00169
Opus 5 $0.00015 $0.00084
Sonnet 5 $0.00006 $0.00034
Haiku 4.5 $0.00003 $0.00017

Measured 9d ago against content hash 8a98a618299b, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

cc-second-brain 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 9d 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.

skills/04-second-brain/SKILL.md · 17 lines

What it actually says

第二大腦設定(Claude Code 版)

建立三層結構:每日筆記/創作庫/知識庫/

  1. 檢查 vault 是否已有三層資料夾
  2. 補建缺失的資料夾和說明筆記
  3. 更新專案 CLAUDE.md 記錄 vault 路徑

每週重整:整理每日筆記 → 更新專案進度 → 清理無用筆記。

回報:各層級狀態、CLAUDE.md 是否已記錄。

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. 9d ago First seen · 17 lines · 30 tokens per session scan A 8a98a618299b

Subscribe to this mod's changes

cc-second-brain is a skill published in the GitHub repository mathruffian-dot/claude-code-lazy-packs (247 stars, last pushed 5d ago), licensed MIT. It adds 30 tokens to every session and 169 once invoked, about $0.0002 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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