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sbh

SBH (Storage Ballast Helper) is a disk space management tool that prevents storage exhaustion through pre-allocated ballast files, artifact scanning and cleanup, and predictive pressure monitoring. Use it to monitor free disk space, automatically release reserved capacity when thresholds are breached, identify and remove stale artifacts by configurable scoring, and run as a daemon for continuous protection across mounted volumes.

Install in Claude Code
Copy
git clone --depth 1 https://github.com/boshu2/agentops /tmp/sbh && cp -r /tmp/sbh/images/gemini/skills/sbh ~/.claude/skills/sbh
Then start a new Claude Code session; the skill loads automatically.

SKILL.md

# SBH — Storage Ballast Helper

Prevents disk-full disasters via ballast files, artifact scanning, and predictive pressure monitoring. Three-pronged: ballast (instant space), scanner (stale artifacts), special locations (/tmp, /dev/shm, swap).

## Quick Check

```bash
sbh status                     # Pressure level + free space
sbh status --json | jq '.pressure'  # Machine-parseable
sbh check --need 5G            # "Do I have 5 GB free?"
sbh check --predict 30         # "Will I run out in 30 min?"
```

Exit codes: 0 = healthy, 1 = pressure, 2 = error.

---

## Daemon

```bash
sbh daemon                          # Foreground (debugging)
systemctl --user start sbh          # Systemd user scope
sbh install --systemd --user --auto # Install + start (Linux)
sbh install --launchd --auto        # Install + start (macOS)
sbh install --wizard                # Guided interactive setup
```

**Signals:** `SIGHUP` = reload config, `SIGUSR1` = force scan now, `SIGTERM` = graceful stop.

---

## Ballast

Pre-allocated sacrificial files — released in milliseconds, no scanning needed.

```bash
sbh ballast status             # Per-volume inventory
sbh ballast provision          # Create/rebuild pool
sbh ballast release 3          # Free 3 files NOW
sbh ballast replenish          # Rebuild after pressure passes
```

Defaults: 10 x 1 GiB = 10 GiB. Ensure ballast dir is on **same mount** as pressure source.

---

## Scanning & Cleanup

```bash
sbh scan /data/projects --top 20       # Rank artifacts by score
sbh clean /data/projects --dry-run     # Preview what would go
sbh clean --target-free 50G --yes      # Delete until 50 GB free
```

Scoring: Location (.25) + Name (.25) + Age (.20) + Size (.15) + Structure (.15) = 1.0.

---

## Protection

```bash
sbh protect /path              # .sbh-protect marker (subtree)
sbh unprotect /path            # Remove marker
```

Config globs: `scanner.protected_paths`. Hard vetoes (always enforced): `.git/` dirs, open files, age < 10 min, non-writable parents.

---

## Emergency Recovery

Zero-write mode for near-100% full disks. No config file needed.

```bash
sbh emergency /data --yes              # Aggressive cleanup NOW
sbh emergency --target-free 10G        # Stop at 10 GB recovered
```

---

## Observability

```bash
sbh dashboard                  # TUI: 7 screens (1-7 to jump)
sbh stats --window 24h         # Activity over last 24 hours
sbh blame --top 10             # Top 10 pressure sources
sbh explain --id <ID>          # Why was this decision made?
```

---

## Configuration

Config: `~/.config/sbh/config.toml` | Env: `SBH_` prefix | Fallback: `/etc/sbh/config.toml`

```bash
sbh config show                # Current values
sbh config validate            # Check constraints
sbh config set KEY VALUE       # Change a value
sbh tune --apply --yes         # Auto-tune for this system
```

---

## Anti-Patterns

| Don't | Do Instead |
|-------|------------|
| Ballast on `/tmp` | `paths.ballast_dir` on same mount as pressure source |
| Daemon as root, CLI as user | `--user` scope — avoids state file permission mismatch |
| Skip pre-build check | `sbh check --need 10G` in CI/hook |
| Delete `.sbh-protect` by hand | `sbh unprotect /path` |
| Wait for Red to act | Act at Yellow — agent swarms escalate fast |
| `min_file_age_minutes = 0` | Keep >= 5 to protect in-flight writes |

---

## Docs

Full documentation: https://github.com/Dicklesworthstone/storage_ballast_helper