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Agent skill

Brain

by poteto in poteto/brainmaxxing

Read/write brain files (Obsidian vault at brain/). An agent skill from poteto/brainmaxxing.

MITAuto-check passedKnowledge Management

Install Brain

skills CLI
$ npx skills add poteto/brainmaxxing --skill brain -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install poteto/brainmaxxing brain --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/poteto/brainmaxxing.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/brain .claude/skills/brain && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
brain
GitHub stars
320
Token cost
~635 tokens
SKILL.md length
266 words
Files
1
Skills in repo
5
Repo updated
First seen
Licence
MIT

At a glance

Read/write brain files (Obsidian vault at brain/). An agent skill from poteto/brainmaxxing.

  • Any task that persists knowledge — reflection
  • SKILL.md covers Before Writing, Structure, Wikilinks and Writing Style, plus 3 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Brain is an agent skill from poteto/brainmaxxing. Read/write brain files (Obsidian vault at brain/). Use for any task that persists knowledge — reflection, planning, or direct edits. Triggers: brain/ modifications, "add to brain".

Its SKILL.md is about 640 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Knowledge Management. It works with Obsidian. The repository describes itself as: stupid simple persistent memory and skill improvement. The licence is MIT.

When your agent uses it

  • Any task that persists knowledge — reflection

Example prompts

  • “add to brain”
  • “/brain”

What it can do on your machine

Read from SKILL.md and the folder at commit ec4d8e4. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Brain loads about 635 tokens when it runs. Until then it costs about 47 tokens; SKILL.md has 266 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~47
When it runs · the whole SKILL.md, loaded when a task matches
~635

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from poteto/brainmaxxing at commit ec4d8e4, republished under its MIT licence (© poteto). 266 words, ~635 tokens.

Download SKILL.mdSave it as .claude/skills/brain/SKILL.md (or your agent's skills folder).
name
brain
description
Read/write brain files (Obsidian vault at brain/). Use for any task that persists knowledge — reflection, planning, or direct edits. Triggers: brain/ modifications, "add to brain".

Brain

Persistent memory across sessions. Obsidian vault at brain/.

The brain is the foundation of the entire workflow — every agent, skill, and session reads it. Low-quality or speculative content degrades everything downstream. Before adding anything, ask: "Does this genuinely improve how the system operates?" If the answer isn't a clear yes, don't write it.

Before Writing

Read brain/index.md first. Then read the relevant entrypoint for your topic:

  • brain/principles.md for principle updates

For directories without a dedicated index file yet, scan nearby files directly and edit an existing note when possible.

Structure

brain/
├── index.md              <- root entry point, links to everything
├── principles.md         <- index for principles/
├── principles/           <- engineering and design principles
├── codebase/             <- project-specific knowledge and gotchas
└── plans/                <- feature plans

Rules:

  • One topic per file. brain/codebase/deploy-gotchas.md, not a mega-file.
  • Maintain existing index entrypoints: brain/index.md, brain/principles.md.
  • If you introduce a new top-level category, add an index-style entrypoint for it (links only, no inlined content).
  • brain/index.md is the root. Every brain file must be reachable from it.
  • File names: lowercase, hyphenated. worktree-gotchas.md.

Format: [[section/file-name]]. Resolution order: same directory, then relative path, then vault root. Heading anchors ([[file#heading]]) are stripped during resolution.

Writing Style

  • Bullets over prose. No preamble.
  • Plain markdown with # Title. No Obsidian frontmatter.
  • Keep notes under ~50 lines. Split if longer.

After Writing

Update brain/index.md for any files you added or removed. Also update the relevant entrypoint when applicable. Keep indexes link-only and scannable.

Durability Test

Ask: "Would I include this in a prompt for a different task?"

  • Yes -> write to brain/. It's durable knowledge.
  • No, it's plan-specific -> update the plan's docs instead.
  • No, it's a skill issue -> update the skill file directly.
  • No, it needs follow-up work -> file a todo.

Maintenance

  • Delete outdated or subsumed notes.
  • Merge overlapping notes before adding new ones.

© poteto, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in .agents/skills/brain of poteto/brainmaxxing.

Open the folder on GitHubat commit ec4d8e4

Compare with similar skills

Brain next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Brain compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Brain this skillpoteto/brainmaxxing320—~635Automated safety check: PassMIT
Auditpricklywiggles/niamos192—~1.4kAutomated safety check: PassNone
Obsidian Project Memorybrycewang-stanford/Auto-Empirical-Research-Skills4.5k—~2.4kAutomated safety check: PassCustom licence
AI BrainOotto-AI/claude-content-skills112—~1.1kAutomated safety check: PassMIT
Setupjdpolasky/ai-chief-of-staff104—~3.5kAutomated safety check: PassMIT
Vault Skill FactoryAr9av/obsidian-wiki3.5k—~1.9kAutomated safety check: PassMIT

Similar skills

  • Audit

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  • Obsidian Project Memory

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  • AI Brain

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    Give Claude a permanent, searchable long-term memory using an Obsidian vault as the store.

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  • Setup

    jdpolasky/ai-chief-of-staff

    First-time setup for the Chief of Staff system. An agent skill from jdpolasky/ai-chief-of-staff.

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  • Vault Skill Factory

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More from poteto/brainmaxxing

  • Meditate

    poteto/brainmaxxing

    Audit and evolve the brain vault — prune outdated content, discover cross-cutting principles, review skills for structural encoding opportunities.

    320 GitHub stars~858 tokensUpdated 7 mo ago
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  • Ruminate

    poteto/brainmaxxing

    Mine past Claude Code conversations for uncaptured patterns, corrections, and knowledge.

    320 GitHub stars~1.1k tokensUpdated 7 mo ago
    Auto-check passed

  • Plan

    poteto/brainmaxxing

    Break down medium-to-large tasks into phased plans in brain/plans/.

    320 GitHub stars~1.7k tokensUpdated 7 mo ago
    Auto-check passed

  • Review

    poteto/brainmaxxing

    Principle-grounded review of code changes, PRs, or plans. An agent skill from poteto/brainmaxxing.

    320 GitHub stars~1.3k tokensUpdated 7 mo ago
    Auto-check passed

Works with

Categories

Questions about Brain

What does Brain do?

Read/write brain files (Obsidian vault at brain/). An agent skill from poteto/brainmaxxing. Brain is an agent skill from poteto/brainmaxxing. Read/write brain files (Obsidian vault at brain/).

When should I use Brain?

Brain fits situations like: any task that persists knowledge — reflection.

How do I install Brain in Claude Code?

Run `npx skills add poteto/brainmaxxing --skill brain -a claude-code`. Or copy the skill folder (.agents/skills/brain in poteto/brainmaxxing) into .claude/skills/brain in your project. Claude Code loads it when a task matches its description.

How do I install Brain in Codex?

Run `npx skills add poteto/brainmaxxing --skill brain -a codex`. Or copy the skill folder (.agents/skills/brain in poteto/brainmaxxing) into .agents/skills/brain in your project. Codex loads it when a task matches its description.

Can I use Brain in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add poteto/brainmaxxing --skill brain -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/brain, .gemini/skills/brain, .github/skills/brain and .opencode/skills/brain in your project.

What does Brain need to run?

SKILL.md names no scripts, command-line tools or credentials: Brain is instructions for the agent only.

Does Brain access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Brain safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Brain use?

Brain is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Brain use?

About 635 tokens (SKILL.md is roughly 2.5k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Brain?

Skills that share tags, products or a category with Brain: Audit (pricklywiggles/niamos, 192 stars), Obsidian Project Memory (brycewang-stanford/Auto-Empirical-Research-Skills, 4.5k stars), AI Brain (Ootto-AI/claude-content-skills, 112 stars) and Setup (jdpolasky/ai-chief-of-staff, 104 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Brain?

poteto (a GitHub user) maintains it in poteto/brainmaxxing, which has 320 GitHub stars. The repository holds 5 skills in this directory. The repository was last updated on February 27, 2026.

Source: poteto/brainmaxxing on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.