session-update

Token Optimization

This skill is inherently efficient due to its simple append-only workflow:

1. Minimal File Operations (Already Optimized)

Pattern: Append update to existing session file with Bash commands

# Append session update (200 tokens)
CURRENT_SESSION=$(cat .claude/sessions/.current-session 2>/dev/null)

cat >> "$CURRENT_SESSION" <<EOF

### Update - $(date '+%Y-%m-%d %H:%M')

**Summary**: $ARGUMENTS

**Git Changes**:
$(git status --porcelain | head -10)
$(git log -1 --oneline)

**Branch**: $(git branch --show-current)
EOF

Token Usage:

• Session file lookup: ~40 tokens
• Update template: ~100 tokens
• Git status commands: ~60 tokens
• Total: ~200 tokens (no optimization needed)

2. Early Exit for No Active Session (90% savings)

Pattern: Detect missing session immediately

# Quick check (80 tokens)
if [ ! -f ".claude/sessions/.current-session" ]; then
    echo "⚠️  No active session found"
    echo "   Start one with /session-start"
    exit 0  # 80 tokens total
fi

# Otherwise: Full update append (200 tokens)

Savings:

• No session: ~80 tokens (early exit)
• Full update: ~200 tokens
• 120 token savings (60%) when no active session

3. Bash-Based Git Summary (No File Reads)

Pattern: Use git commands instead of reading changed files

# Bash-based git summary (60 tokens)
GIT_STATUS=$(git status --porcelain | head -10)
LAST_COMMIT=$(git log -1 --oneline)
BRANCH=$(git branch --show-current)

# Alternative: Read changed files (~300+ tokens)
# for file in $(git status --porcelain | awk '{print $2}'); do
#     Read "$file"  # 50-200 tokens per file
# done

Token Usage:

• Bash commands: ~60 tokens
• File reads: ~300+ tokens (reading changed files)
• Already optimized - 80% savings vs file reading

4. Incremental TODO Status (Optional)

Pattern: Read TODO cache if available, skip if not

# Optional TODO status (100 tokens if available, 0 if not)
if [ -f ".claude/cache/todos/summary.json" ]; then
    TODO_STATUS=$(jq -r '.summary' .claude/cache/todos/summary.json)
    echo "**TODO Progress**: $TODO_STATUS"
fi

# Don't generate TODO status from scratch (would be 500+ tokens)

Token Usage:

• Cached TODO status: ~100 tokens
• Generate from scratch: ~500+ tokens
• Skip if unavailable: 0 tokens (graceful degradation)

5. Real-World Token Usage Distribution

Typical Scenarios:

1. Standard Update (180-250 tokens)

   • Session lookup: 40 tokens
   • Update template: 100 tokens
   • Git status: 60 tokens
   • TODO status (if cached): 100 tokens
   • Total: ~300 tokens (with TODO)
   • Total: ~200 tokens (without TODO)

2. No Active Session - Early Exit (70-90 tokens)

   • Session check: 40 tokens
   • Warning message: 40 tokens
   • Total: ~80 tokens

3. Minimal Update (150-200 tokens)

   • Session lookup: 40 tokens
   • Timestamp + message: 80 tokens
   • Git branch only: 30 tokens
   • Total: ~150 tokens

Expected Token Usage:

• Baseline: 150-250 tokens (already efficient)
• Early exit: 80 tokens (60% savings)
• Average: ~200 tokens (minimal overhead)

Optimization Summary

Strategy	Savings	When Applied
Minimal file operations	N/A	Already optimized
Early exit for no session	120 tokens (60%)	No active session
Bash-based git summary	240 tokens (80%)	Always (vs file reads)
Optional TODO status	400 tokens (80%)	When cache unavailable

Key Insight: This skill is already near-optimal at ~200 tokens due to its simple append workflow with Bash commands. No file reads are performed - only git commands and template appending. Early exit provides 60% savings when no session is active.

Update the current development session by:

1. Check if .claude/sessions/.current-session exists to find the active session
2. If no active session, inform user to start one with /project:session-start
3. If session exists, append to the session file with:
   • Current timestamp
   • The update: $ARGUMENTS (or if no arguments, summarize recent activities)
   • Git status summary:
     • Files added/modified/deleted (from git status --porcelain)
     • Current branch and last commit
   • Todo list status:
     • Number of completed/in-progress/pending tasks
     • List any newly completed tasks
   • Any issues encountered
   • Solutions implemented
   • Code changes made

Keep updates concise but comprehensive for future reference.

Example format:

### Update - 2025-06-16 12:15 PM

**Summary**: Implemented user authentication

**Git Changes**:
- Modified: app/middleware.ts, lib/auth.ts
- Added: app/login/page.tsx
- Current branch: main (commit: abc123)

**Todo Progress**: 3 completed, 1 in progress, 2 pending
- ✓ Completed: Set up auth middleware
- ✓ Completed: Create login page
- ✓ Completed: Add logout functionality

**Details**: [user's update or automatic summary]