Session

Session Management

Iron Law: CONTEXT PRESERVED IS CONTEXT RECOVERED. Document state before transition.

Overview

Session management enables work continuity across multiple conversations, phases, or agent handoffs. The session file is the single source of truth - everything needed to resume work must be documented there.

When to Use

• Work spans multiple conversations
• Complex features requiring phased implementation
• Handoff between specialists or agents
• Long-running tasks with natural break points
• Any work that might be interrupted and resumed

Session File Structure

Sessions live in .claude/tasks/ directory:

.claude/tasks/
  session-current.md    # Active session
  session-001.md        # Archived sessions
  session-002.md
  session-template.md   # Template for new sessions

The Session Lifecycle

1. CREATE   -> Initialize session file with context
2. WORK     -> Execute with continuous documentation
3. CHECKPOINT -> Save state at natural break points
4. HANDOFF  -> Transfer context to next phase/agent
5. RESUME   -> Recover from documented state
6. ARCHIVE  -> Close session, extract learnings

Step 1: Create - Initialize Session

When starting multi-phase work:

# Session [Number] - [Descriptive Title]

## Session Context

**Created**: [timestamp]
**Goal**: [single sentence describing end state]
**Trigger**: [user request or continuation from prior session]
**Estimated Scope**: [Small/Medium/Large]
**Dependencies**: [external systems, prior work needed]

## Success Criteria

1. [Specific, measurable outcome]
2. [Specific, measurable outcome]
3. [Specific, measurable outcome]

## Phase Breakdown

### Phase 1: [Name]
**Status**: Not Started
**Prerequisites**: [list]
**Deliverables**: [list]

### Phase 2: [Name]
**Status**: Not Started
**Prerequisites**: Phase 1 complete
**Deliverables**: [list]

## Current State

**Active Phase**: Phase 1
**Last Action**: Session created
**Next Action**: [first task]
**Blockers**: None

Naming Convention: session-current.md for active work, renamed to session-XXX-[topic].md on archive.

Step 2: Work - Execute with Documentation

During execution, update session file continuously:

## Work Log

### [Timestamp] - [Agent/Phase]

**Action**: [what was done]
**Result**: [outcome]
**Files Modified**: [list]
**Decisions Made**: [key choices]
**Context for Next**: [what successor needs to know]

Update Frequency:

• After each significant action
• Before any break or handoff
• When encountering blockers
• After decisions that affect future work

Step 3: Checkpoint - Save State

Checkpoints are explicit save points for recovery:

## Checkpoint [Number]

**Timestamp**: [when]
**Phase**: [which phase]
**Progress**: [X/Y tasks complete]
**State Summary**: [one paragraph describing current state]

### What's Working
- [feature/component that is complete and verified]

### What's In Progress
- [task currently being worked on]
- [current status and next immediate step]

### What's Blocked
- [blocker and what's needed to resolve]

### What's Next
- [immediate next action when work resumes]

### Recovery Commands
```bash
# To verify current state:
npm test
git status

# To continue from here:
[specific command or file to start with]

**Create checkpoints:**
- At natural break points
- Before risky operations
- At phase transitions
- Every 30-60 minutes of work
- Before any handoff

## Step 4: Handoff - Transfer Context

When passing work to another agent or phase:

```markdown
## Handoff Record

**From**: [agent/phase]
**To**: [agent/phase]
**Timestamp**: [when]

### Context Transfer

**What Was Accomplished**:
1. [completed item with evidence]
2. [completed item with evidence]

**Current State**:
- Active branch: `feature/auth-flow`
- Tests: 23/23 passing
- Build: Clean

**What Needs to Happen Next**:
1. [specific task with clear scope]
2. [specific task with clear scope]

**Gotchas and Warnings**:
- [thing that might trip up successor]
- [non-obvious dependency or quirk]

**Files to Review First**:
1. `src/auth/middleware.ts` - Core logic lives here
2. `tests/auth.test.ts` - Test patterns established

**Questions for Successor**:
- [decision that needs to be made]
- [ambiguity to resolve]

Step 5: Resume - Recover from State

When continuing from a checkpoint:

## Resume Protocol

### 1. Read Session File Completely
Do NOT start work until full context is understood.

### 2. Verify State Matches Documentation
```bash
# Run recovery commands from last checkpoint
npm test        # Should match documented state
git status      # Should match documented state

3. Check for External Changes

• Did codebase change since checkpoint?
• Did dependencies update?
• Did requirements change?

4. Document Resume Point

Resumed At: [timestamp] Resuming From: Checkpoint [N] State Verification: [Matches / Diverged] Adjustments Needed: [None / describe]

5. Continue from Last Next Action

[Begin work from documented next step]

**If state doesn't match:** Document divergence, assess impact, adjust plan.

## Step 6: Archive - Close Session

When session work is complete:

```markdown
## Session Closure

**Completed**: [timestamp]
**Duration**: [total time across all phases]
**Final Status**: Complete / Partial / Abandoned

### Accomplishments
1. [what was built/fixed/improved]
2. [what was built/fixed/improved]

### Learnings
- [pattern discovered worth remembering]
- [gotcha to avoid next time]

### Follow-up Items
- [ ] [work that should happen in future session]
- [ ] [tech debt incurred]

### Files Created/Modified
[list for reference]

### Archive Action
Rename to: `session-XXX-[topic].md`
Create new: `session-current.md` from template

Session File Template

# Session [Number] - [Title]

## Session Context
**Created**: [timestamp]
**Goal**: [what we're trying to achieve]
**Trigger**: [what initiated this session]
**Scope**: Small / Medium / Large

## Success Criteria
1. [criterion]
2. [criterion]

## Phase Breakdown
### Phase 1: [Name]
**Status**: Not Started / In Progress / Complete
**Prerequisites**: [list]
**Deliverables**: [list]

## Current State
**Active Phase**: [phase]
**Last Action**: [what happened]
**Next Action**: [what to do]
**Blockers**: [none or describe]

## Work Log
### [Timestamp] - [Agent/Phase]
**Action**:
**Result**:
**Files Modified**:
**Context for Next**:

## Checkpoints
### Checkpoint 1
**Timestamp**:
**State Summary**:
**Recovery Commands**:

## Handoffs
### Handoff 1
**From**: **To**:
**Context Transfer**:

## Session Closure
**Status**: Open

Examples

Good Session Management

Session: Authentication Feature

Phase 1 Complete - Schema design (Checkpoint 1)
  - users table created
  - sessions table created
  - Tests: 5/5 passing

Handoff to Phase 2 (Backend)
  - Context: Schema ready in migrations/
  - Next: Create auth middleware
  - Gotcha: Session expiry needs config

Phase 2 In Progress - Checkpoint 2
  - Middleware complete
  - Login endpoint complete
  - Next: Logout endpoint
  - Blocker: None

[Clear trail for anyone resuming]

Bad Session Management (DO NOT DO THIS)

"I worked on auth stuff yesterday. Let me continue...
I think I was doing the login endpoint? Or was it
the middleware? Let me check git log..."

[No session file, no state, no recovery path]

Why wrong: No documented state, guessing at progress, wasted time recovering.

Common Rationalizations

Red Flags - STOP and Start Over

• Working without a session file for multi-phase work
• No checkpoints in active session
• Session file out of sync with actual state
• Handoff without context transfer documentation
• Resuming without verifying state
• No success criteria defined
• No clear "Next Action" documented
• Guessing at what was done previously

If you catch yourself doing any of these: STOP. Create/update session file.

Verification Checklist

Before ending any work session:

• Session file exists and is current
• Current state accurately documented
• Checkpoint created with recovery commands
• Next action clearly specified
• Blockers documented if any
• Work log updated
• Files modified list current
• Handoff context ready if applicable

State Tracking Quick Reference

ALWAYS document: Current state, next action, blockers
CHECKPOINT: Every 30-60 min, before breaks, before handoffs
HANDOFF: What, why, gotchas, files to review
RESUME: Read fully, verify state, then continue
ARCHIVE: Learnings, follow-ups, rename file

Integration with Other Skills

Pairs with:

• execute - Track plan progress in session
• verification - Document verification results
• brainstorm - Record decision context
• tdd - Track test state across sessions
• git-expert - Document branch and commit state

Multi-Agent Session Coordination

When multiple agents contribute to a session:

## Agent Contributions

### Master Orchestrator
**Scope**: Planning and coordination
**Completed**: Phase breakdown, task assignment

### Backend Engineer
**Scope**: API implementation
**Completed**: Auth endpoints
**Handoff To**: Frontend Specialist

### Frontend Specialist
**Scope**: UI integration
**Status**: In Progress
**Current Task**: Login form

### Quality Engineer
**Scope**: Testing and validation
**Status**: Pending
**Waiting For**: Frontend complete

Each agent updates only their section, reads full context before starting.