Brain Sync

Synchronize your ~/.brain data with a GitHub repository.

Why sync? Your Brain data (roles, projects, logs) is personal and evolves over time. Keeping it on GitHub lets you restore it on any machine and never lose your principles.

Execution Steps

1. Check Git Initialization

Check if ~/.brain/.git exists:

• Not initialized → proceed to Step 2 (Initial Setup)
• Initialized, no remote → proceed to Step 3 (Add Remote)
• Initialized, remote exists → proceed to Step 4 (Sync)

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2. Initialize Git Repository

Run:

git -C ~/.brain init
git -C ~/.brain symbolic-ref HEAD refs/heads/main

Create ~/.brain/.gitignore if it doesn't exist:

# OS generated files
.DS_Store
.DS_Store?
._*
.Spotlight-V100
.Trashes
ehthumbs.db
Thumbs.db

Then proceed to Step 3.

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3. Configure Remote Repository

Ask the user how they want to set up the remote:

Option A: Create with gh CLI (automatic)

• Check if gh is installed: which gh
• If not installed: inform user to install GitHub CLI (brew install gh on macOS) and fall back to Option B
• If installed:
  • Ask for repository name (default: brain-data)
  • Make an initial commit so there's something to push:

    git -C ~/.brain add -A
    git -C ~/.brain commit -m "brain sync: initial commit"
    

  • Run: gh repo create {name} --private --source ~/.brain --push
  • This creates a private repo, sets the remote, and pushes in one step
  • Skip to Step 5

Option B: Enter URL manually

• Ask user to provide the GitHub repository URL
• Suggest creating a private repository (personal data)
• Run:

  git -C ~/.brain remote add origin {url}
  

• Proceed to Step 4

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4. Sync

4-1. Pull remote changes

git -C ~/.brain fetch origin main 2>/dev/null
git -C ~/.brain rebase origin/main 2>/dev/null || true

Handle pull results:

• Success or up to date: proceed normally
• Conflict detected (rebase fails):
  • Abort rebase: git -C ~/.brain rebase --abort
  • Notify user: "Sync conflict detected. Please resolve manually in ~/.brain before syncing again."
  • Exit

4-2. Commit local changes

git -C ~/.brain add -A
git -C ~/.brain commit -m "brain sync: $(date '+%Y-%m-%d %H:%M')"

• If nothing to commit: note it and continue to push (remote may have been pulled)

4-3. Push to remote

git -C ~/.brain push -u origin main

Handle push results:

• Success: proceed to Step 5
• Rejected (diverged): notify user to resolve manually

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5. Confirm

Show a brief summary:

• Sync timestamp
• Files changed (if any)
• Remote URL

Example:

Brain synced at 2024-03-01 14:32
Remote: https://github.com/ohgyun/brain-data
3 files updated

Notes

• Private repository recommended: Your Brain data contains personal principles and decisions
• Frequency: Run /brain-sync anytime — after /brain-commit is a natural moment
• No automatic sync: Sync is always intentional, triggered by you