OpenClaw Automation Explained: From Zero to Enterprise‑Ready Architecture, Hooks & Webhooks

Overall Architecture

OpenClaw consists of several layers: Client (command entry), Gateway (the system’s "big manager" handling requests, events, and workflow), Hooks , Cron , Heartbeat (trigger mechanisms), Agent (the brain that decides and plans), Skills (the hands that execute), and Plugins (extension packages for external integration).

Standard Execution Flow (Human‑Friendly)

You send a command or an external event.

Gateway receives it.

Hooks / Cron / Heartbeat are triggered.

Agent decides what to do.

Skills perform the work.

Plugins connect to external systems.

The result is returned.

Key reminder: intercept → think → execute → wrap‑up.

Where Hooks Reside

Hooks are not inside the Agent or Skills layers; they live in the Gateway layer, acting as interceptors and extensions.

Automation System Diagram

Automation System
                        │
      ┌────────────────┼────────────────┐
      │                │                │
      ▼                ▼                ▼
    Hooks            Cron          Heartbeat
   (event)        (timed)          (loop)
      │                │                │
      └───────────────┬─────────────────┘
                       ▼
                     Agent
                       │
                       ▼
                     Skills
                       │
                       ▼
                      Tools

The three “driving forces” are Hooks (event‑driven), Cron (time‑driven), and Heartbeat (loop‑driven), all passing through Gateway → Agent → Skills → Tools .

Core Components at a Glance

Trigger layer: Hooks / Cron / Heartbeat

Execution layer: Agent

Capability layer: Skills / Plugins

Scheduling layer: Gateway

Mnemonic: Hooks push outward, Skills pull outward, Webhook pushes inward, Plugin integrates, Agent decides, Gateway schedules.

1. Hooks (Event Automation)

What It Is

Hooks run a script automatically when an event occurs.

Core Functions

Listen to all key system events.

Execute logic automatically when the event fires.

Extend the system without modifying core code.

Trigger Methods

Pure event‑driven examples: command:new (new command) message:received (message received) agent:bootstrap (Agent start) gateway:startup (Gateway start)

Typical Uses

Automatic session/context saving

Log recording and audit

Pre‑/post‑command handling

Workflow auto‑start

File writing, messaging, external API calls

Loading Mechanism

When Gateway starts, it scans three directories by priority: workspace/hooks (current Agent) ~/.openclaw/hooks (user‑wide) openclaw/dist/hooks (system‑provided)

Each hook is a folder, e.g.:

my-hook/
 ├── HOOK.md      # description & metadata
 └── handler.ts   # actual code

Full Trigger Flow

User sends /new or similar command.

System validates the request.

Hook event is created.

All hook handlers execute.

The original command continues.

Note: Hooks do not replace the original command; they insert logic before or after it.

2. Cron (Timed Automation)

What It Is

Cron runs tasks at scheduled times, like an alarm clock.

Nature

A timed scheduler.

Trigger Methods

Cron expressions such as:

Every day at 9 am

Every hour

Every Monday

First day of each month

Typical Uses

Send daily/weekly reports

Periodic data scraping

Automatic backups

Scheduled task orchestration

3. Heartbeat (Loop Automation)

What It Is

Runs continuously at fixed intervals, like a loop worker.

Nature

Loop worker.

Trigger Intervals

Every 10 seconds

Every 1 minute

Every 5 minutes

Typical Uses

Polling external system status

Real‑time monitoring

Keeping the Agent alive

System auto‑inspection

4. Agent (Intelligent Brain)

Functions

Understand task intent.

Formulate an execution plan.

Invoke Skills tools.

Output the final result.

Essence

Combination of a large language model (LLM), a planner, and a reasoner.

Inputs

User commands.

Triggers from Hooks / Cron / Heartbeat.

Outputs

Tool invocations.

Generated answers.

Completion of complex tasks.

5. Skills (Execution Capability Layer)

Function

Actual “hands‑on” layer that performs work.

Essence

Tool functions / capability interfaces.

What It Can Do

File operations

Browser automation

Code execution

API calls

Data processing

6. Plugins (Extension & Integration Layer)

Function

Add “plugins” to OpenClaw, integrating external systems.

Essence

Integration layer / adapters.

Can Connect To

Slack, Notion, GitHub

Databases

Message queues

Internal enterprise systems

7. Webhook (External Service Invocation)

What It Is

Gateway exposes an HTTP entry point so external systems (e.g., SpringBoot, GitHub) can trigger OpenClaw tasks via HTTP.

Typical Endpoints

POST /hooks/agent

– trigger an Agent run (most common) POST /hooks/wake – lightweight wake‑up / event injection POST /hooks/{custom} – map to internal actions

Execution Flow

External system sends a request with a token.

Gateway authenticates and validates.

Request is turned into an Agent task and executed asynchronously.

Gateway immediately returns 200 Accepted.

Background runs: context → model inference → tool calls → session save.

Result is stored in the session.

Configuration Example (openclaw.json)

{
  "hooks": {
    "enabled": true,
    "token": "your‑secret‑key",
    "path": "/hooks"
  }
}

8. AgentLoop Execution Mechanism

Submit (agent) : pass parameters, receive a runId, do not wait.

Background execution (AgentLoop) : assemble context → model inference → tool calls → finish.

Wait (agent.wait) : poll the runId until the task ends, returning status only.

Fetch result : read the final answer from the session file.

9. Calling External APIs (Three Ways)

Hooks : push data outward (chat logs, analytics, etc.).

Skills : actively call external APIs (order lookup, user query, approval, business system).

Plugins : package a set of Skills or Hooks and integrate with SaaS, databases, or message queues.

10. Enterprise‑Level Deployment (Java / SpringBoot)

Deploy OpenClaw.

Hooks for pushing chat logs, logs, analysis results.

Skills for calling business APIs.

SpringBoot API layer receives external requests.

Underlying services:

MySQL

Redis

Message Queue (MQ)

Integrate with business services and workflow engines.

11. When to Use Hooks, Skills, or Plugins

Use Hooks for

Chat record storage

User behavior analysis

Log auditing

Data synchronization

Event notifications

Saving AI results

Hook = event → push data to your system.

Use Skills for

Create orders

Query user information

Call business interfaces

Initiate approvals

Query databases

Integrate CRM / ERP

Skill = Agent → call your API.

Use Plugins for

Package a group of Skills or Hooks

Integrate third‑party SaaS

Connect databases, message queues

Build enterprise‑level integration extensions

One‑Sentence Summary

OpenClaw automation is a system of event‑trigger, timed‑trigger, and loop‑trigger mechanisms orchestrated by Gateway, with Agent making intelligent decisions, Skills executing actions, and Plugins handling external integrations.