brain-init

brain-init is a skill for Claude Code from toroleapinc/claude-brain. It costs 23 tokens per session (1,173 once invoked), scanned B, original, MIT.

A setup tool for synchronizing a Claude Code workspace through a Git remote, a repository used to store and exchange files. It exports the workspace's current state and can enable encryption.

In plain words
What is it for?
Checking dependencies, validating a remote URL, reviewing the current workspace inventory, and initializing synchronization with a private Git repository.
Why use it?
It helps create a remote backup or synchronization point for instructions, skills, settings, and related agent data, while warning about public repositories.

Skill for Claude Code

Written for Claude Code: ${CLAUDE_PLUGIN_ROOT} variable. Also seen: reads .claude/ paths; mentions CLAUDE.md; mentions Claude Code.

Runs only inside its plugin — its command needs a path that Claude Code sets for a plugin’s own hooks and for nothing else. Install the plugin, not this.

Part of the claude-brain plugin — 9 skills, 1 agent, 3 hooks shipped together

Install

Getting it into your agent

This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.

Claude Code
/plugin marketplace add toroleapinc/claude-brain
Claude Code
/plugin install claude-brain

Made for: Claude Code.

Or install claude-brain, the plugin that ships this one along with the rest of its 9 skills, 1 agent, 3 hooks.

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 brain-init

README.md
[![agentmods](https://agentmods.dev/badge/skills/toroleapinc/claude-brain/brain-init.svg)](https://agentmods.dev/skills/toroleapinc/claude-brain/brain-init)
Your own site
<a href="https://agentmods.dev/skills/toroleapinc/claude-brain/brain-init"><img src="https://agentmods.dev/badge/skills/toroleapinc/claude-brain/brain-init.svg" alt="Measured on agentmods" height="20"></a>
Per session 23 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,173 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 1 finding. 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 5.1 $0.00023 $0.01173
Opus 5 $0.00012 $0.00587
Sonnet 5 $0.00005 $0.00235
Haiku 4.5 $0.00002 $0.00117

Measured 6d ago against content hash fddf8145536e, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade B, and why

brain-init scanned grade B with 1 finding 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 6d 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.

Reads agent configuration directoriesmediumAgent snooping

.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.

MACHINE_ID=$(cat ~/.claude/brain-config.json | jq -r '.machine_id')
skills/brain-init/SKILL.md · 131 lines

How it starts

The opening of the file, as written. The whole thing — 131 lines — stays where its author put it; the contents beside it link to each section on GitHub.

The user wants to initialize their Claude Brain sync network.

Parse arguments:

  • If arguments contain "--encrypt", enable encryption
  • The first non-flag argument is the Git remote URL

Arguments provided: $ARGUMENTS

Steps

  1. First, check dependencies by running:

    "${CLAUDE_PLUGIN_ROOT}/scripts/common.sh" && echo "OK"
    

    If jq and git are missing, tell the user what to install.

  2. Validate the remote URL for security:

    source "${CLAUDE_PLUGIN_ROOT}/scripts/common.sh"
    validate_remote_url "$ARGUMENTS"
    

    If the URL is detected as pointing to a PUBLIC repository, STOP and warn the user:

    • "WARNING: This repository appears to be PUBLIC. Your brain data (memory, skills, settings, and potentially sensitive information) will be visible to anyone."
    • "Please use a PRIVATE repository."
    • Ask the user if they want to continue anyway.
  3. Show the user their current brain inventory by running:

    bash "${CLAUDE_PLUGIN_ROOT}/scripts/status.sh"
    
  4. IMPORTANT: Show the user a security notice before proceeding: Tell the user:

    • "Brain sync will export the following to the Git remote:"
    • " - CLAUDE.md, rules, skills, agents (your instructions and workflows)"
    • " - Auto memory and agent memory (learned patterns from your sessions)"
    • " - Settings (hooks, permissions — NOT env vars)"
    • " - MCP server configurations (command/args only — env vars with API keys are STRIPPED)"
    • " - Keybindings"
    • ""
    • "What is NEVER exported: OAuth tokens, API keys in env vars, ~/.claude.json, session transcripts"
    • ""
    • "Note: Memory files may contain information from your conversations. Review ~/.claude/projects/*/memory/ if concerned."
  5. Ask the user to confirm they want to initialize brain sync with the provided remote.

  6. Run the initialization sequence:

    # Parse arguments for encryption flag
    ENABLE_ENCRYPTION=false
    REMOTE_URL=""
    for arg in $ARGUMENTS; do
      case "$arg" in
        --encrypt) ENABLE_ENCRYPTION=true ;;
        *) if [ -z "$REMOTE_URL" ]; then REMOTE_URL="$arg"; fi ;;
      esac
    done
    
    # Create brain repo directory
    mkdir -p ~/.claude/brain-repo
    
    # Initialize git repo
    cd ~/.claude/brain-repo
    git init
    git remote add origin "$REMOTE_URL" 2>/dev/null || git remote set-url origin "$REMOTE_URL"
    
    # Create directory structure
    mkdir -p machines consolidated meta
    
    # Initialize meta files
    echo '{"entries":[]}' > meta/merge-log.json
    
    # Set up encryption if requested
    if [ "$ENABLE_ENCRYPTION" = "true" ]; then
      echo "Setting up age encryption..."
      
      # Check if age is installed
      if ! command -v age-keygen &>/dev/null; then
        echo "ERROR: age not found. Install it from https://github.com/FiloSottile/age"
        echo "On macOS: brew install age"
        echo "On Ubuntu/Debian: apt install age"
        exit 1
      fi
    
      # Generate age keypair
      source "${CLAUDE_PLUGIN_ROOT}/scripts/common.sh"
      IDENTITY_FILE="${HOME}/.claude/brain-age-key.txt"
      RECIPIENTS_FILE="${HOME}/.claude/brain-repo/meta/recipients.txt"
      generate_age_keypair "$IDENTITY_FILE" "$RECIPIENTS_FILE"
      
      echo "Age encryption configured:"
      echo "  Private key: $IDENTITY_FILE"
      echo "  Public key: $RECIPIENTS_FILE"
    fi
    
    # Register this machine (with encryption settings)
    if [ "$ENABLE_ENCRYPTION" = "true" ]; then
      bash "${CLAUDE_PLUGIN_ROOT}/scripts/register-machine.sh" "$REMOTE_URL" --encrypt
    else
      bash "${CLAUDE_PLUGIN_ROOT}/scripts/register-machine.sh" "$REMOTE_URL"
    fi
    
    # Export initial brain snapshot
    MACHINE_ID=$(cat ~/.claude/brain-config.json | jq -r '.machine_id')
    mkdir -p "machines/${MACHINE_ID}"
    bash "${CLAUDE_PLUGIN_ROOT}/scripts/export.sh" --output "machines/${MACHINE_ID}/brain-snapshot.json"
    
    # Copy as initial consolidated brain
    cp "machines/${MACHINE_ID}/brain-snapshot.json" consolidated/brain.json
    
    # Commit and push (specific paths, not -A)
    git add machines/ consolidated/ meta/
    git commit -m "Initialize brain: $(hostname)"
    git branch -M main
    git push -u origin main
    

Read the full file on GitHub · 131 lines

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. 6d ago First seen · 131 lines · 23 tokens per session scan B fddf8145536e

Subscribe to this mod's changes

brain-init is a skill published in the GitHub repository toroleapinc/claude-brain (85 stars, last pushed 2mo ago), licensed MIT. It adds 23 tokens to every session and 1,173 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it B with 1 finding (reads agent configuration directories). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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