# Session Lifecycle Metrics

**Purpose**: Document session management for Working Paper v0.1
**Date Collected**: 2025-10-25
**Scope**: Session initialization, closedown, handoff continuity

---

## Session Handoff Documents

8
SESSION_CLOSEDOWN_2025-10-24.md
SESSION_CLOSEDOWN_2025-10-25.md
SESSION_HANDOFF_2025-10-22_FOOTER_FIX_FAILED.md
SESSION_HANDOFF_2025-10-23_BLOG_VALIDATION_PUBLISHED_POSTS.md
SESSION_HANDOFF_2025-10-23_FRAMEWORK_ANALYSIS.md
SESSION_HANDOFF_2025-10-23_WEBSITE_AUDIT.md
SESSION_HANDOFF_ENFORCEMENT_COMPLETE.md
SESSION_SUMMARY_2025-10-24_AUDIT_LOGGING_FIX.md

**Count**: See above
**Pattern**: SESSION_CLOSEDOWN_YYYY-MM-DD.md, SESSION_HANDOFF_*.md

---

## Session Management Scripts

**session-init.js**:
- Purpose: Initialize framework at session start
- Checks: 9 mandatory checks (server, components, instructions, etc.)
- New Feature (inst_083): Handoff auto-injection
- Last Updated: Commit 292c9ce (2025-10-25)

**session-closedown.js**:
- Purpose: Clean shutdown with handoff creation
- Phases: 6 phases (cleanup, analysis, git, deployment, handoff, marker)
- New Feature: Dev server protection (port 9000)
- Last Updated: Commit 4716f0e (2025-10-25)

---

## Handoff Auto-Injection (inst_083)

**Implementation Date**: 2025-10-25 (Commit 292c9ce)

**Problem Solved**: 27027-style pattern recognition failure
- Claude was skipping handoff document reading
- Pattern "Warmup → session-init → ready" overrode explicit instruction

**Solution**: Architectural enforcement
- session-init.js Section 1a automatically detects SESSION_CLOSEDOWN_*.md
- Extracts and displays:
  - Priorities from previous session
  - Recent commits (recent work)
  - Known issues/blockers
  - Cleanup summary

**Verification**: Tested this session
- Handoff context auto-injected on session start
- Priorities extracted correctly
- RESEARCH_DOCUMENTATION_PLAN.md commit visible

**Impact**: Makes handoff context unavoidable (no voluntary compliance needed)

---

## Session State Tracking

**Location**: .claude/session-state.json

**Tracked Metrics**:
- Session ID
- Message count
- Token estimate
- Framework activity per component
- Staleness thresholds
- Alerts

**Current State** (from framework-stats.js):
- Session ID: 2025-10-07-001
- Message Count: 1 (appears stale/not updated)
- Action Count: 1,332+
- Context Pressure: NORMAL (0%)

---

## Token Checkpoints

**Location**: .claude/token-checkpoints.json

**Configuration**:
- Budget: 200,000 tokens
- Checkpoints: 25% (50k), 50% (100k), 75% (150k)
- Purpose: Pressure monitoring and compaction planning

**Current Session**:
- Next checkpoint: 50,000 tokens (25%)
- Completed checkpoints: None yet
- Current usage: ~134k / 200k (67%)

---

## Context Pressure Monitoring

**Component**: ContextPressureMonitor
**Trigger Points**: Session start, checkpoints (50k, 100k, 150k)

**Current Pressure**: NORMAL (0%)

**Formula** (from code):
- Token score: (current / budget) * 40
- Message score: (count / threshold) * 30
- Task score: (open / 10) * 30
- Overall: Sum of scores

**Thresholds**:
- NORMAL: 0-30%
- ELEVATED: 30-50%
- HIGH: 50-75%
- CRITICAL: 75-100%

---

## Session Continuity Test (This Session)

**Test Conducted**: Phase 0.1

**Steps**:
1. ✅ Ran session-closedown.js --dry-run
2. ✅ Verified handoff document creation
3. ✅ Simulated new session start
4. ✅ Verified handoff context auto-injected
5. ✅ Confirmed priorities extracted correctly

**Result**: Session lifecycle working as designed

**Bug Found**: session-closedown was killing dev server
**Fix Applied**: Added port 9000 protection

---

## What These Metrics Show

**Strengths**:
- Session lifecycle architecture working
- Handoff auto-injection prevents context loss
- Framework activity tracked per component
- Pressure monitoring operational

**Limitations**:
- Session state appears stale (message count = 1)
- Token estimate not synchronized
- Limited historical session data
- Single session tested (this one)

---

## Verification

```bash
# List handoff documents
ls SESSION_*.md

# Test session-init
node scripts/session-init.js

# Test session-closedown (dry-run)
node scripts/session-closedown.js --dry-run

# Check session state
cat .claude/session-state.json | jq

# Check token checkpoints
cat .claude/token-checkpoints.json | jq
```

---

**Last Updated**: 2025-10-25
**Author**: John G Stroh
**License**: Apache 2.0