8 Lifecycle Hooks for Perfect AI Agent Coordination

Your AI agents work in isolation. They overwrite each other’s changes. Critical context disappears before compaction. Important messages get missed. ULPI Hooks fixes all of this—automatically.

Zero Merge Conflicts

Pre-edit hooks check file reservations and block conflicting changes before they happen

Context Preserved

Pre-compact hooks create memory snapshots before Claude compresses context

Never Miss Messages

User-prompt hooks alert agents to urgent coordination messages

Clean Shutdowns

Session-end hooks release all file reservations and complete pending tasks

The Problem: AI Assistants Work in Silos

You’ve experienced this frustration working with multiple AI coding assistants:

Constant merge conflicts when two agents edit the same file
Lost context when Claude compacts your conversation history
Missed urgent messages from other agents on your team
Orphaned file locks when sessions crash without cleanup
No coordination between Claude Code, Cursor, and other tools

Your AI team needs integration points. Hooks provides them.

The Solution: Deep Lifecycle Integration

ULPI Hooks intercepts 8 critical lifecycle events in your AI coding assistant and enables:

Without Hooks
With ULPI Hooks

The Chaos of Uncoordinated Agents

File Conflicts:

Agent A edits auth.ts
Agent B edits auth.ts at the same time
Merge conflict requires manual resolution
15 minutes lost

Lost Context:

Important architecture decision discussed
Context approaches token limit
Claude compacts conversation
Decision details lost forever
Must re-explain from scratch

Missed Messages:

Security issue found by Agent A
Agent B doesn’t see the urgent message
Deploys vulnerable code
Critical bug reaches production

Automatic Coordination

File Conflict Prevention:

Agent A edits auth.ts
Pre-edit hook reserves the file automatically
Agent B attempts to edit auth.ts
Blocked by hook with clear message
Agent B coordinates via messaging instead
Zero conflicts, zero time lost

Context Preservation:

Important architecture decision discussed
Context approaches token limit
Pre-compact hook fires automatically
Creates memory snapshot of decision
Claude compacts conversation safely
Critical context preserved

Urgent Message Alerts:

Security issue found by Agent A
Urgent message sent to Agent B
User-prompt hook shows alert banner
Agent B sees issue before responding
Addresses security flaw immediately
Zero bugs reach production

8 Strategic Lifecycle Hooks

Each hook intercepts a critical moment in your AI assistant’s lifecycle:

🚀 session-start: Register Agent & Load Context

Fires when: Your AI coding assistant starts a new sessionWhat it enables:

Automatic agent registration with ULPI Coordination
Display coordination dashboard with active agents
Show file reservations from other agents
Initialize memory context from previous sessions
Present urgent messages waiting for acknowledgment

Exit Codes:

0 - Allow session to start normally
2 - Block session (e.g., critical pending acknowledgments)

Performance: ~150ms average latency

🔒 pre-tool-use:edit: Prevent File Conflicts

Fires before: Any file edit operationWhat it enables:

Check file reservations in Coordination system
Block edits if another agent has claimed the file
Auto-reserve files on first edit (shared or exclusive mode)
Show which agent has the file reserved
Suggest coordination via messaging

Exit Codes:

0 - Allow edit (file available or already reserved by this agent)
2 - Block edit (file reserved by another agent)

Performance: ~120ms average latencyResult: Zero merge conflicts, guaranteed

📋 post-tool-use:edit: Track Obligations

Fires after: Any file edit operation completesWhat it enables:

Show pending tasks related to edited file
Display required acknowledgments
Track what needs review after modification
Update file reservation status
Log edit for audit trail

Exit Codes:

0 - Always allow (non-blocking hook)

Performance: ~80ms average latency

💾 pre-compact: Save Critical Context

Fires before: Claude compacts conversation historyWhat it enables:

Create memory snapshot of current context
Extract architecture decisions and learnings
Preserve critical technical details
Store important code patterns
Save pending tasks and obligations

Exit Codes:

0 - Allow compaction to proceed
2 - Block compaction (rarely used)

Performance: ~200ms average latencyResult: Never lose critical context again

💬 user-prompt-submit: Alert to Urgent Messages

Fires before: Agent responds to user inputWhat it enables:

Check for urgent unread messages
Display critical coordination alerts
Show pending acknowledgments that require attention
Present important file reservation conflicts
Alert to high-priority tasks

Exit Codes:

0 - Allow response (no urgent messages)
2 - Block response (critical message requires acknowledgment)

Performance: ~100ms average latencyResult: Never miss critical coordination info

⏹️ stop: Prevent Unsafe Shutdowns

Fires when: User attempts to stop agent executionWhat it enables:

Check for pending critical acknowledgments
Warn about incomplete file reservations
Block shutdown if critical tasks incomplete
Allow graceful completion of obligations
Prevent orphaned locks

Exit Codes:

0 - Allow stop (all clear)
2 - Block stop (pending critical tasks)

Performance: ~90ms average latency

🧹 session-end: Clean Up Resources

Fires when: Session ends normallyWhat it enables:

Release all file reservations automatically
Mark agent as offline in Coordination
Store final memory snapshot
Complete logging and audit trail
Clean handoff to next session

Exit Codes:

0 - Always allow (cleanup hook)

Performance: ~110ms average latencyResult: Zero orphaned file locks

👶 subagent-stop: Consolidate Learnings

Fires when: A spawned subagent completes its taskWhat it enables:

Store subagent learnings to shared memory
Release subagent file reservations
Report results to parent agent
Update task status
Clean up subagent resources

Exit Codes:

0 - Always allow (cleanup hook)

Performance: ~95ms average latency

Real-World Use Cases

Multi-Agent Development Team

Scenario: 3 developers (Alice, Bob, Charlie) work on the same repositoryHow Hooks Help:

Alice edits auth.ts → pre-edit hook reserves it
Bob tries to edit → blocked with clear message
Bob messages Alice through Coordination
They coordinate the changes
Result: Zero merge conflicts

Parallel Task Execution

Scenario: Main agent spawns 5 subagents for parallel workflowsHow Hooks Help:

Each subagent claims unique files via pre-edit hooks
Subagent-stop hooks consolidate learnings to memory
Session-end hooks clean up all reservations
Result: 6x faster execution, zero conflicts

Context Preservation

Scenario: Long architecture discussion approaching token limitHow Hooks Help:

Pre-compact hook fires automatically
Creates memory snapshot of key decisions
Claude compacts conversation safely
Architecture details preserved
Result: Never re-explain critical context

Emergency Code Freeze

Scenario: Security issue discovered, must stop all editsHow Hooks Help:

Admin sends urgent message to all agents
User-prompt hooks show alert before every response
Pre-edit hooks can be configured to block all edits
Result: Immediate coordination across team

Compatible AI Assistants

ULPI Hooks works with any AI coding assistant that supports lifecycle hooks (MCP-compatible):

Full Support (8/8 Hooks)
Partial Support (6/8 Hooks)
Coming Soon

✅ Fully Supported

These assistants support all 8 lifecycle hooks out of the box:

Claude Code - Official Anthropic IDE with complete hook support
Cursor - Full lifecycle integration including subagent hooks
Windsurf - Complete hook implementation with MCP bridge

Setup: Run ulpi setup and hooks are installed automatically

Performance Metrics

Hooks are optimized for minimal latency impact:

Hook	Avg Latency	MCP Calls	Can Block?
session-start	150ms	3-5	✅ Yes
pre-tool-use:edit	120ms	1-2	✅ Yes
post-tool-use:edit	80ms	1	❌ No
pre-compact	200ms	2-3	✅ Yes
user-prompt-submit	100ms	1-2	✅ Yes
stop	90ms	1	✅ Yes
session-end	110ms	2-3	❌ No
subagent-stop	95ms	1-2	❌ No

Total overhead: ~140ms average per hook execution Network calls: 14 MCP tool calls across all hooks User impact: Imperceptible in normal workflows

Blocking hooks (session-start, pre-edit, user-prompt, stop) only fire when necessary to prevent conflicts or ensure safety. Non-blocking hooks run asynchronously.

Automatic Setup

Getting started with Hooks takes one command:

Install ULPI Package

One package contains CLI, MCP bridge, and hooks—everything you need:

# Install globally (recommended)
npm install -g ulpi

# Or locally in your project
npm install ulpi

Run Guided Setup

Interactive setup configures hooks automatically for all supported IDEs:

# Run the setup wizard
ulpi setup

# Follow the prompts:
# 1. Enter your API token
# 2. Select your IDE(s)
# 3. Hooks are installed automatically
#
# That's it! Setup handles everything.

Restart Your IDE

Hooks activate automatically—zero manual configuration needed:

# Restart your IDE (Claude Code, Cursor, Windsurf, etc.)
# Hooks will start intercepting lifecycle events
# Check terminal for hook execution logs
#
# All 8 hooks are now active and coordinating your agents!

Setup complete! Your AI assistants are now coordinated through ULPI Hooks.

Integration with Other ULPI Products

Hooks supercharges other ULPI products by providing automatic integration:

Coordination

File Reservations: Pre-edit hooks check and create reservations automaticallyMessaging: User-prompt hooks display urgent agent messagesContact Policies: Session-start hooks enforce contact policies

Memory

Snapshots: Pre-compact hooks create memory snapshots automaticallyContext Loading: Session-start hooks retrieve relevant memoriesLearning Storage: Subagent-stop hooks consolidate learnings

Tasks

Task Updates: Post-edit hooks update task status after file changesDependencies: Pre-edit hooks check task dependencies before editsObligation Tracking: Session-end hooks ensure task completion

Skills

Workflow Hooks: Skills can define custom hook behaviorsBest Practices: Pre-edit hooks enforce skill-defined patternsLearning Loop: Post-edit hooks improve skill recommendations

Pricing

FREE with Coordination + Memory

Hooks are included FREE with any Coordination + Memory subscription.

Starter: $29/month includes Hooks
Professional: $99/month includes Hooks
Enterprise: Custom pricing includes Hooks

No additional cost. No setup fees. No per-hook charges.

Why FREE? Hooks maximize the value of Coordination and Memory by automating their integration. When your agents coordinate seamlessly and preserve context automatically, you get exponentially more value from both products.

Success Metrics

Teams using ULPI Hooks report:

Zero merge conflicts (down from 12-20 per week)
100% context preservation (vs 40% loss without hooks)
85% reduction in coordination overhead
3x faster multi-agent collaboration
60% fewer manual file conflict resolutions

FAQ

Do I need to manually configure each hook?

No! Running ulpi setup automatically installs and configures all 8 hooks for your IDE. Zero manual configuration required.

Will hooks slow down my AI assistant?

Minimal impact. Average hook latency is ~140ms, which is imperceptible in normal workflows. Blocking hooks only fire when necessary to prevent conflicts.

What happens if a hook fails?

Hooks fail gracefully. If a hook times out or errors, the default behavior is to allow the operation to proceed (except for safety-critical hooks like pre-edit).

Can I disable specific hooks?

Yes! The ULPI config file allows you to enable/disable individual hooks. However, we recommend keeping all hooks active for full coordination benefits.

Do hooks work with local/offline AI models?

Hooks require network access to the ULPI API for coordination and memory features. Local-only models won’t benefit from multi-agent coordination.

How do I troubleshoot hook issues?

Enable debug logging in your ULPI config: ulpi config set debug=true. Hook execution logs appear in your IDE’s terminal/console.

Next Steps

Quick Start

Install hooks in 5 minutes with our guided setup wizard

Lifecycle Events

Deep dive into all 8 hooks and their trigger conditions

File Conflict Prevention

Learn how pre-edit hooks guarantee zero merge conflicts

Use Cases

Real-world scenarios where hooks save hours of coordination time

Getting Started

Documentation

Skills

Coordination

Memory

Hooks

Tasks

Help & Security

Documentation Index

​8 Lifecycle Hooks for Perfect AI Agent Coordination

Zero Merge Conflicts

Context Preserved

Never Miss Messages

Clean Shutdowns

​The Problem: AI Assistants Work in Silos

​The Solution: Deep Lifecycle Integration

​The Chaos of Uncoordinated Agents

​Automatic Coordination

​8 Strategic Lifecycle Hooks

​Real-World Use Cases

Multi-Agent Development Team

Parallel Task Execution

Context Preservation

Emergency Code Freeze

​Compatible AI Assistants

​✅ Fully Supported

​⚠️ Partial Support

​🚧 In Development

​Performance Metrics

​Automatic Setup

​Integration with Other ULPI Products

Coordination

Memory

Tasks

Skills

​Pricing

FREE with Coordination + Memory

​Success Metrics

​FAQ

​Next Steps

Quick Start

Lifecycle Events

File Conflict Prevention

Use Cases

8 Lifecycle Hooks for Perfect AI Agent Coordination

The Problem: AI Assistants Work in Silos

The Solution: Deep Lifecycle Integration

The Chaos of Uncoordinated Agents

Automatic Coordination

8 Strategic Lifecycle Hooks

Real-World Use Cases

Compatible AI Assistants

✅ Fully Supported

⚠️ Partial Support

🚧 In Development

Performance Metrics

Automatic Setup

Integration with Other ULPI Products

Pricing

Success Metrics

FAQ

Next Steps