Safe Rm

Safe RM - Protected File Deletion for Git Projects

Purpose

This skill teaches safe file deletion practices to prevent accidental loss of unstaged/untracked files in Git repositories, while allowing efficient cleanup of build artifacts and dependencies. It works seamlessly with AI coding agents and human users.

When to Use This Skill

Use this skill whenever you need to delete files or directories, especially:

• Cleaning up build artifacts or dependencies
• Removing temporary files in Git repositories
• Any rm -rf operation in project directories
• Deleting files that might include untracked source code

Critical Safety Principles

1. NEVER directly delete in Git repositories without checking

Before any deletion operation in a Git repository, you MUST:

• Check if files are tracked, staged, or untracked
• Classify files by type and risk level
• Use appropriate deletion method based on classification

2. Classification System

Files fall into three categories:

AUTO_ALLOW (safe to delete directly, just log):

• Build artifacts: dist/, build/, target/, out/, .next/, public/build/
• Dependencies: node_modules/, vendor/, .venv/, venv/, __pycache__/
• Cache: .cache/, .pytest_cache/, .mypy_cache/, .tox/
• Compiled: *.pyc, *.class, *.o, *.so, *.dll
• Temp: *.tmp, *.log, *.swp, .DS_Store, Thumbs.db

AUTO_TRASH (move to trash, highly recoverable):

• Untracked source code: *.py, *.js, *.ts, *.jsx, *.tsx, *.rs, *.go, *.java, *.c, *.cpp, *.h
• Untracked docs: *.md, *.txt, *.rst, *.adoc
• Untracked configs: *.json, *.yaml, *.toml, *.ini (not in .gitignore)
• Local env files: *.env.local, *.env.development, .env.*.local
• Any files modified in last 24 hours
• Any file with "important", "draft", "wip", "todo" in name

BLOCK (refuse deletion, return error):

• .git/ directory
• Root directories: /, /home, /etc, /usr, /var
• System directories: /bin, /sbin, /lib
• Files matching protection patterns: **/*important*/**, **/*backup*/**

Implementation Guide

Step 1: Detection (Required First Step)

# Check if in Git repository
if git rev-parse --is-inside-work-tree >/dev/null 2>&1; then
    IN_GIT_REPO=true
    
    # Get list of untracked files in target path
    UNTRACKED=$(git ls-files --others --exclude-standard "$TARGET_PATH")
    
    # Get list of files in .gitignore
    IGNORED=$(git check-ignore "$TARGET_PATH"/* 2>/dev/null)
fi

Step 2: Classification

# Classify each file/directory
classify_file() {
    local file="$1"
    local basename=$(basename "$file")
    
    # Check BLOCK patterns first (highest priority)
    case "$file" in
        .git|.git/*|/|/home|/etc|/usr|/var|/bin|/sbin|/lib)
            echo "BLOCK"
            return
            ;;
        *important*|*backup*)
            echo "BLOCK"
            return
            ;;
    esac
    
    # Check AUTO_ALLOW patterns (build artifacts, etc.)
    case "$basename" in
        node_modules|dist|build|target|out|.next|__pycache__|.cache|vendor|.venv|venv)
            echo "ALLOW"
            return
            ;;
    esac
    
    case "$file" in
        *.pyc|*.class|*.o|*.so|*.dll|*.tmp|*.log|*.swp|.DS_Store)
            echo "ALLOW"
            return
            ;;
    esac
    
    # Check if in .gitignore (AUTO_ALLOW)
    if git check-ignore -q "$file" 2>/dev/null; then
        echo "ALLOW"
        return
    fi
    
    # Check if untracked source code (AUTO_TRASH)
    if [[ "$IN_GIT_REPO" == "true" ]] && echo "$UNTRACKED" | grep -q "^$file$"; then
        case "$file" in
            *.py|*.js|*.ts|*.jsx|*.tsx|*.rs|*.go|*.java|*.c|*.cpp|*.h|*.md|*.txt)
                echo "TRASH"
                return
                ;;
        esac
    fi
    
    # Default: TRASH (safe mode)
    echo "TRASH"
}

Step 3: Execution

# Execute deletion based on classification
delete_safely() {
    local file="$1"
    local classification=$(classify_file "$file")
    local timestamp=$(date '+%Y-%m-%d %H:%M:%S')
    
    case "$classification" in
        BLOCK)
            echo "ERROR: Blocked deletion of protected path: $file" >&2
            echo "$timestamp | BLOCK | $file | REFUSED" >> ~/.local/state/safe-rm/audit.log
            return 1
            ;;
            
        ALLOW)
            # Direct deletion, but log it
            rm -rf "$file"
            echo "$timestamp | ALLOW | $file | deleted" >> ~/.local/state/safe-rm/audit.log
            ;;
            
        TRASH)
            # Move to trash for recovery
            trash-put "$file"
            echo "$timestamp | TRASH | $file | trashed" >> ~/.local/state/safe-rm/audit.log
            ;;
    esac
}

Correct Usage Examples

Example 1: Clean Build Artifacts

# AI Agent internal reasoning:
# "User wants to clean project. Let me check what's safe to delete."

# Check Git status first
git status --short

# Clean node_modules (AUTO_ALLOW - in .gitignore)
rm -rf node_modules/
echo "$(date '+%Y-%m-%d %H:%M:%S') | ALLOW | node_modules/ | deleted" >> ~/.local/state/safe-rm/audit.log

# Clean dist (AUTO_ALLOW - build artifact)
rm -rf dist/
echo "$(date '+%Y-%m-%d %H:%M:%S') | ALLOW | dist/ | deleted" >> ~/.local/state/safe-rm/audit.log

Example 2: Mixed Content Directory

# AI Agent internal reasoning:
# "Directory contains both source code and build files. Must classify individually."

# Check untracked files
UNTRACKED=$(git ls-files --others --exclude-standard src/)

# Process each file
for file in src/*; do
    if [[ "$file" == *".pyc" ]] || [[ "$file" == *"__pycache__"* ]]; then
        # Compiled files - safe to delete
        rm -rf "$file"
        echo "$(date '+%Y-%m-%d %H:%M:%S') | ALLOW | $file | deleted" >> ~/.local/state/safe-rm/audit.log
    elif echo "$UNTRACKED" | grep -q "^$file$"; then
        # Untracked source - move to trash
        trash-put "$file"
        echo "$(date '+%Y-%m-%d %H:%M:%S') | TRASH | $file | trashed" >> ~/.local/state/safe-rm/audit.log
    else
        # Tracked file - probably shouldn't delete, but if needed:
        rm "$file"
        echo "$(date '+%Y-%m-%d %H:%M:%S') | ALLOW | $file | deleted" >> ~/.local/state/safe-rm/audit.log
    fi
done

Example 3: Complete Project Cleanup

# AI Agent internal reasoning:
# "User wants fresh start. Must preserve untracked work-in-progress."

# First, identify and trash untracked source files
git ls-files --others --exclude-standard | while read -r file; do
    case "$file" in
        *.py|*.js|*.ts|*.md|*.txt)
            trash-put "$file"
            echo "$(date '+%Y-%m-%d %H:%M:%S') | TRASH | $file | trashed (untracked source)" >> ~/.local/state/safe-rm/audit.log
            ;;
    esac
done

# Then clean build artifacts
rm -rf node_modules/ dist/ .cache/
echo "$(date '+%Y-%m-%d %H:%M:%S') | ALLOW | build-artifacts | deleted" >> ~/.local/state/safe-rm/audit.log

# Inform user
echo "Cleanup complete. Untracked source files moved to trash. Use 'trash-list' to review."

Recovery Procedures

View Trashed Files

# List all trashed files
trash-list

# List trashed files from today
trash-list | grep "$(date '+%Y-%m-%d')"

# Search for specific file
trash-list | grep "filename"

Restore Trashed Files

# Interactive restore
trash-restore

# Direct restore (if you know the path)
trash-restore /path/to/file

Check Audit Log

# View recent deletions
tail -50 ~/.local/state/safe-rm/audit.log

# View all TRASH operations today
grep "$(date '+%Y-%m-%d')" ~/.local/state/safe-rm/audit.log | grep TRASH

# View all BLOCK attempts
grep BLOCK ~/.local/state/safe-rm/audit.log

Integration with Btrfs Snapshots

On systems with btrfs and Snapper (like OpenSUSE Tumbleweed), you have an additional recovery layer:

# List available snapshots
sudo snapper list

# Compare current state with snapshot
sudo snapper diff <snapshot-number>..0

# Restore from snapshot if needed
sudo snapper rollback <snapshot-number>

Common Patterns for AI Agents

Pattern 1: Dependency Cleanup

# Safe pattern for removing dependencies
if [[ -d "node_modules" ]]; then
    rm -rf node_modules/
    echo "$(date '+%Y-%m-%d %H:%M:%S') | ALLOW | node_modules/ | deleted" >> ~/.local/state/safe-rm/audit.log
fi

Pattern 2: Build Cleanup

# Safe pattern for build artifacts
for dir in dist build target out .next; do
    if [[ -d "$dir" ]]; then
        rm -rf "$dir/"
        echo "$(date '+%Y-%m-%d %H:%M:%S') | ALLOW | $dir/ | deleted" >> ~/.local/state/safe-rm/audit.log
    fi
done

Pattern 3: Untracked File Check Before Deletion

# Always check for untracked source before rm -rf
if git rev-parse --is-inside-work-tree >/dev/null 2>&1; then
    UNTRACKED_SRC=$(git ls-files --others --exclude-standard | grep -E '\.(py|js|ts|md|txt)$')
    if [[ -n "$UNTRACKED_SRC" ]]; then
        echo "WARNING: Found untracked source files. Moving to trash:"
        echo "$UNTRACKED_SRC"
        echo "$UNTRACKED_SRC" | while read -r file; do
            trash-put "$file"
            echo "$(date '+%Y-%m-%d %H:%M:%S') | TRASH | $file | auto-protected" >> ~/.local/state/safe-rm/audit.log
        done
    fi
fi

Error Handling

If trash-cli is not available:

if ! command -v trash-put >/dev/null 2>&1; then
    echo "ERROR: trash-cli not installed. Cannot safely delete files." >&2
    echo "Install with: sudo zypper install trash-cli" >&2
    exit 1
fi

If audit log is not writable:

AUDIT_LOG="${SAFE_RM_AUDIT_LOG:-${XDG_STATE_HOME:-$HOME/.local/state}/safe-rm/audit.log}"
if [[ ! -w "$AUDIT_LOG" ]] && [[ ! -w "$(dirname "$AUDIT_LOG")" ]]; then
    # Fallback to stderr
    echo "$(date '+%Y-%m-%d %H:%M:%S') | WARNING | Could not write to audit log" >&2
fi

Performance Considerations

For AI agents running many operations:

• Cache Git repo detection: git rev-parse --show-toplevel
• Batch operations where possible
• Use simple pattern matching before expensive Git commands
• Skip Git checks for known build directories

Critical Reminders

1. ALWAYS log deletions to ~/.local/state/safe-rm/audit.log
2. ALWAYS classify before deleting - never assume
3. PREFER trash over rm when uncertain
4. NEVER delete .git directory
5. VERIFY untracked files before bulk operations
6. TEST with dry-run when implementing new deletion logic

Testing Your Implementation

Before executing deletion code:

# Dry run - show what would be deleted
echo "Would delete: $TARGET"
classify_file "$TARGET"

# Verify classification matches expectations
# Only then proceed with actual deletion

Summary Decision Tree

File to delete?
├─ Is .git or system path? → BLOCK (error)
├─ Is build artifact/dependency? → ALLOW (delete, log)
├─ Is in .gitignore? → ALLOW (delete, log)
├─ Is untracked source code? → TRASH (move, log)
└─ Uncertain? → TRASH (safe default, log)

Tool Requirements

Required tools (check before execution):

• git - for repository detection
• trash-put - for safe deletion (from trash-cli package)
• Standard shell utilities: grep, basename, date

Installation on OpenSUSE Tumbleweed:

sudo zypper install trash-cli git

Support and Maintenance

Audit log: ~/.local/state/safe-rm/audit.log (override with SAFE_RM_AUDIT_LOG) Trash: ~/.local/share/Trash/ Configuration: ~/.config/safe-rm/safe-rm-rules.yaml (override with SAFE_RM_CONFIG_DIR)

Regular maintenance:

# Empty trash older than 30 days
trash-empty 30

# Review audit log monthly
grep "$(date -d '1 month ago' '+%Y-%m')" ~/.local/state/safe-rm/audit.log | wc -l

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