Version: Latest (4.6.0)

Building AI Agents Guide

Build and configure ServiceNow AI Agents and AI Agentic Workflows using the Fluent SDK. AI Agents perform tasks with tools (CRUD, script, OOB, reference-based), while AI Agentic Workflows orchestrate multiple agents as a team. This guide covers end-to-end creation: authentication, tool configuration, instructions authoring, triggers, ACL deployment, and editing existing agents. Requires SDK 4.4.0 or higher.

When to Use

Creating a new AI Agent in ServiceNow
Creating AI Agentic Workflows that orchestrate multiple agents
Modifying existing agents or agentic workflows (adding tools, changing auth, updating instructions)
Configuring agent authentication and security (Dynamic User vs AI User)
Selecting and configuring agent tools (CRUD, script, OOB tools)
Setting up triggers for agents or agentic workflows
Defining team members for agentic workflows

Workflow vs Single Agent Decision Tree

User Request
    |
Does it involve multiple tasks? (AND, THEN, followed by)
    | NO  -> USE SINGLE AI AGENT
    | YES
        |
    Do the tasks require DIFFERENT capability types?
    (e.g., search + summarize, fetch from table A + update table B)
        | NO  -> USE SINGLE AI AGENT (multiple tools, one agent)
        | YES -> USE AI AGENTIC WORKFLOW

Pattern Recognition:

User Says	Type	Why
"Fetch X AND do Y" (different capabilities)	Workflow	Different capability types working together
"Get data THEN process it" (different agents)	Workflow	Sequential operations needing different specializations
"Look up and update an incident"	Single Agent	Same table, same capability type (CRUD), multiple tools
"Search for incidents by priority"	Single Agent	Single task

Key distinction: Multiple tools on the same table or same capability type = single agent with multiple tools. Multiple capability types requiring different specializations = workflow with multiple agents.

AI Agent vs AI Agentic Workflow

Feature	AI Agent	AI Agentic Workflow
Purpose	Single agent performing tasks	Multiple agents working as a team
Import	`AiAgent` from `@servicenow/sdk/core`	`AiAgenticWorkflow` from `@servicenow/sdk/core`
Configuration	`tools` array	`team: { $id, name, members: [...] }`
Version array	`versionDetails`	`versions`
Record identity	`$id` (explicit ID)	`$id` (explicit ID)
Security	`securityAcl` (mandatory, auto-generates ACL)	`securityAcl` (mandatory, auto-generates ACL)
Run-as user	`runAsUser`	`runAs`
Execution mode	`executionMode` on tools	`executionMode` at workflow level (default: `'copilot'`)
Trigger channel	`'nap'` / `'nap_and_va'` (agent-level `channel`)	`"Now Assist Panel"` (trigger-level, mandatory)
Processing messages	`processingMessage`, `postProcessingMessage`	Not available

Security ACL (`securityAcl`)

securityAcl is mandatory on both AiAgent and AiAgenticWorkflow. It controls who can invoke the agent/workflow and auto-generates the sys_security_acl and sys_security_acl_role records. It is a discriminated union on the type field — each variant also requires a $id to identify the generated ACL record.

Access Types

`type`	Who can invoke	Extra fields
`'Any authenticated user'`	Any logged-in user	None
`'Specific role'`	Only users with listed roles	`roles: [...]` (required)
`'Public'`	Anyone, no auth required	None

// Any authenticated user
securityAcl: {
    $id: Now.ID['my_agent_acl'],
    type: 'Any authenticated user',
}

// Specific roles only
securityAcl: {
    $id: Now.ID['my_agent_acl'],
    type: 'Specific role',
    roles: [
        '282bf1fac6112285017366cb5f867469',  // itil role sys_id
        'b05926fa0a0a0aa7000130023e0bde98',  // user role sys_id
    ]
}

Important distinction: securityAcl controls who can invoke the agent. runAsUser (agent) / runAs (workflow) and dataAccess are separate — they control which user identity the agent runs under when executing.

Execution Identity (`runAsUser` / `dataAccess`)

Set either runAsUser (agent) or dataAccess — not both:

runAsUser — agent always runs as the specified sys_user sys_id regardless of invoker
dataAccess.roleList — agent runs as the invoking user, restricted to the listed roles. Required when runAsUser is not set. For workflows, use dataAccess when runAs is not set.

Role Discovery

Identify target tables from the agent's CRUD tools
Query sys_security_acl_role for each table (encodedQuery: sys_security_acl.nameLIKE<table_name>)
Add discovered role sys_ids to securityAcl.roles and/or dataAccess.roleList

Common Role sys_ids

Role	sys_id
admin	`2831a114c611228501d4ea6c309d626d`
itil	`282bf1fac6112285017366cb5f867469`
user	`b05926fa0a0a0aa7000130023e0bde98`

Tool Types and Selection

Selection Priority

OOB tools when available (e.g., Web Search, RAG, Knowledge Graph)
Reference-based tools (action, subflow, capability, catalog, topic)
CRUD tools for database operations
Script tools only when no other tool type fits

Never use CRUD tools for journal fields (work_notes, comments). Always use Script tools with GlideRecordSecure.

Tool Selection Guide

Need	Tool Type	Why
Read/search records	CRUD (`lookup`)	Direct table query
Create new records	CRUD (`create`)	Maps inputs to columns
Modify records	CRUD (`update`)	Query + field update
Custom logic	Script	Full JavaScript control
Web information	OOB (`web_automation`)	Auto-linked OOB tool
Knowledge retrieval	OOB (`rag`)	RAG Search Retrieval
Graph-based search	OOB (`knowledge_graph`)	Knowledge Graph tool
File ingestion	OOB (`file_upload`)	File Uploader tool
In-depth research	OOB (`deep_research`)	Deep Research tool
Desktop tasks	OOB (`desktop_automation`)	Desktop Automation tool
MCP integration	OOB (`mcp`)	MCP tool
Flow Designer action	Action (`action`)	Triggers existing flows
Now Assist skill	Capability (`capability`)	Links to skills

`inputs` Format by Tool Type

Tool type	`inputs` format	Has `script` field?
`crud`	Object (`ToolInputType`) with `operationName`, `table`, `inputFields`, etc.	No (auto-generated)
`script`	Array of `[{ name, description, mandatory, value? }]`	Yes
`web_automation`	Omit (plugin provides defaults)	No
Reference types	Omit (platform resolves at runtime)	No
Other OOB types	Omit (plugin provides defaults)	No

Required Tool Properties

Every tool must have name and type. preMessage and postMessage are strongly recommended. Every agent must have processingMessage and postProcessingMessage (not available on workflows).

CRUD Tools

Operations

Operation	Required Fields
`create`	`table`, `inputFields` with `mappedToColumn`
`lookup`	`table`, `queryCondition`, `returnFields` (mandatory)
`update`	`table`, `queryCondition`, `inputFields` with `mappedToColumn`
`delete`	`table`, `queryCondition`

queryCondition Syntax

Format: "column_name=={{input_field_name}}". Always verify column names by querying sys_dictionary before writing tools.

Operator	Syntax	Example
Equals	`field=value`	`state=1`
Not equals	`field!=value`	`state!=7`
Contains	`fieldLIKEvalue`	`short_descriptionLIKEnetwork`
Is empty	`fieldISEMPTY`	`assigned_toISEMPTY`
OR	`^OR`	`priority=1^ORpriority=2`

Lookup Best Practices

Use LIKE operator for text-based searches
Use multiple keyword inputs with OR for natural language
Prefer number over sys_id as primary filter: number={{id}}^ORsys_id={{id}}
For reference fields in returnFields, include referenceConfig: { table: "sys_user", field: "name" }

Script Tools

All script inputs are strings at runtime. Parse with parseInt(), JSON.parse(), etc. The inputs field for script tools is a simple array of input field definitions (unlike CRUD tools which use an object).

(function(inputs) {
    var impact = parseInt(inputs.impact, 10);
    var urgency = parseInt(inputs.urgency, 10);
    // ... logic
    return { priority: result, status: 'success' };
})(inputs);

Always use GlideRecordSecure (not GlideRecord)
Do NOT add CDATA tags (plugin handles automatically)
inputSchema is auto-generated from inputs — do not specify it manually
Use module imports for server-side script files (or Now.include() for legacy scripts)

Reference-Based Tools

Each requires a type-specific reference field containing the target record's sys_id. Do NOT add inputs.

Tool Type	Required Field	Target Table
`action`	`flowActionId`	`sys_hub_action_type_definition`
`capability`	`capabilityId`	`sn_nowassist_skill_config`
`subflow`	`subflowId`	`sys_hub_flow`
`catalog`	`catalogItemId`	`sc_cat_item`
`topic`	`virtualAgentId`	`sys_cs_topic`
`topic_block`	`virtualAgentId`	`sys_cs_topic`

OOB Tools

OOB tools only require type and name. The plugin auto-links to the existing OOB tool record.

{
    type: 'web_automation',
    name: 'AIA Web Search',
    preMessage: 'Searching the web...',
    postMessage: 'Web search results retrieved.'
}

Other supported OOB types: 'rag', 'knowledge_graph', 'file_upload', 'deep_research', 'desktop_automation', 'mcp'.

Instructions Authoring

Three Key Fields

Field	Purpose	Answers
`description`	Scope	"What problem does this agent solve?"
`agentRole`	Identity (agents only)	"Who am I?"
`instructions`	Behavior	"How should I act and use my tools?"

Writing Principles

Actionable steps: Every step must bind to a tool action or concrete output
Explicit tool references: Name tools explicitly in instructions
Contingencies: Handle failures with gates: "DO NOT PROCEED if details are missing"
Trigger context: Use "from the task" or "from the context" -- NOT "from the triggering record"

Scaling by Complexity

Complexity	Tools/Agents	Instructions Length
Simple	1-2 tools	5-10 lines
Moderate	3-4 tools	10-20 lines
Complex	5+ tools	20-30 lines
Workflow	2-10 agents	15-30 lines

If instructions exceed ~30 lines, split into multiple agents orchestrated by a workflow.

Trigger Configuration

Triggers are optional. Agents/workflows can operate without them via Now Assist Panel.

Trigger Types

Type	Description
`record_create`	On new record creation
`record_update`	On record update
`record_create_or_update`	On both
`email`	On email receipt
`scheduled`	On a repeating interval
`daily` / `weekly` / `monthly`	Scheduled at specific times
`ui_action` (workflows only)	From a UI action button

Key Differences: Agent vs Workflow Triggers

Property	Agent trigger	Workflow trigger
`channel`	`"nap"` or `"nap_and_va"`	`"Now Assist Panel"` (mandatory)
`triggerCondition`	Optional	Mandatory for record-based
`objectiveTemplate`	Required (defaults to `""`)	Optional

Scheduled Trigger Fields

The schedule object is used when triggerFlowDefinitionType is 'scheduled', 'daily', 'weekly', or 'monthly'.

Type	Required Fields (inside `schedule` object)
`daily`	`schedule.time`
`weekly`	`schedule.runDayOfWeek` (1=Sun to 7=Sat), `schedule.time`
`monthly`	`schedule.runDayOfMonth` (1-31), `schedule.time`
`scheduled`	`schedule.repeatInterval` (e.g., `'1970-01-05 12:00:00'` = every 5 days)

Time format: "1970-01-01 HH:MM:SS".

The schedule.triggerStrategy field controls repeat behavior. Values differ by entity type:

Entity	Valid `triggerStrategy` values
AI Agent	`'every'`, `'once'`, `'unique_changes'`, `'always'`
AI Agentic Workflow	`'every'`, `'immediate'`, `'manual'`, `'once'`, `'repeat_every'`, `'unique_changes'`

Run-As Configuration

For record-based triggers, use one of:

runAs: "<column_name>" — column-based (the column on the target table that holds the user reference)
runAsUser: "<sys_id>" — run as a specific user
runAsScript — a script returning a user sys_id for dynamic resolution

ACL Deployment

Both AI Agents and AI Agentic Workflows use securityAcl. The plugin automatically generates sys_security_acl and sys_security_acl_role records — no manual two-step deployment is needed.

The generated ACL name follows the format: {domain}.{scope}.{name}

// Works the same for both AiAgent and AiAgenticWorkflow
securityAcl: {
    $id: Now.ID['my_agent_acl'],
    type: 'Specific role',
    roles: [
        '282bf1fac6112285017366cb5f867469',  // itil
        'b05926fa0a0a0aa7000130023e0bde98'   // user
    ]
}

Workflow Configuration

Team Structure

Workflows use $id for record identity (just like agents). The team object also requires its own $id.

team: {
    $id: Now.ID["workflow_team"],  // MANDATORY on team
    name: "Workflow Team",
    // description is auto-populated from workflow.description — do not set it
    members: [
        "62826bf03710200044e0bfc8bcbe5df1"  // Agent sys_id from sn_aia_agent table
    ]
}

Team members can also be specified using the Record API (recommended for portability across instances):

import { AiAgenticWorkflow, Record } from '@servicenow/sdk/core'

const lookupAgent = Record({ table: 'sn_aia_agent', $id: Now.ID['lookup_agent'], data: { name: 'Lookup Agent' } })
const analysisAgent = Record({ table: 'sn_aia_agent', $id: Now.ID['analysis_agent'], data: { name: 'Analysis Agent' } })

AiAgenticWorkflow({
    // ...
    team: {
        $id: Now.ID['my_team'],
        name: 'My Team',
        members: [lookupAgent, analysisAgent],
    },
})

Agents must be deployed before creating workflows.

Workflow-Level Fields

Field	Type	Default	Notes
`executionMode`	`'copilot' \| 'autopilot'`	`'copilot'`	Execution mode for the workflow
`memoryScope`	`string`	`'global'`	Memory scope for team members
`active`	`boolean`	`true`	Omit if active (default)
`sysDomain`	`string`	`'global'`	Omit if global (default)

Only specify fields that differ from their defaults — the plugin suppresses default values in the transform output.

Deployment Order

Create and deploy AI Agents (with securityAcl)
Get agent sys_ids from sn_aia_agent
Create and deploy workflow with securityAcl and agent sys_ids
Verify with run_query on sn_aia_usecase

contextProcessingScript

Supports inline scripts or Now.include() for external files:

(function(task, user_utterance, workflow_id, context) {
    return {
        pageContext: context?.pageContext,
        triggerContext: context?.triggerContext
    };
})(task, user_utterance, workflow_id, context);

// Preferred: external file
contextProcessingScript: Now.include('./context-processing-script.js')

Complete AI Agent Example

import { AiAgent } from "@servicenow/sdk/core";

export const incidentHelperAgent = AiAgent({
    $id: Now.ID["incident_helper_agent"],
    name: "Incident Helper Agent",
    description: "Retrieves incident details and searches for resolution guidance.",
    agentRole: "You are an ITSM incident specialist.",

    // Security — auto-generates ACL records
    securityAcl: {
        $id: Now.ID['incident_helper_agent_acl'],
        type: 'Specific role',
        roles: [
            '282bf1fac6112285017366cb5f867469',  // itil
            'b05926fa0a0a0aa7000130023e0bde98'   // user
        ]
    },

    channel: 'nap_and_va',
    recordType: 'custom',
    processingMessage: "Analyzing your incident request...",
    postProcessingMessage: "Incident analysis complete.",

    versionDetails: [{
        name: "V1",
        number: 1,
        state: "published",
        instructions: `Step 1: Extract the incident number from the user's request.
Step 2: Use the Lookup Incident tool to fetch details.
Step 3: Present details in bullet-point format.
Step 4: Use AIA Web Search for resolution guidance.
Step 5: Recommend next steps. NEVER modify without user approval.`
    }],

    tools: [
        {
            active: true,
            name: "Lookup Incident",
            description: "Searches for incidents by number",
            executionMode: "autopilot",
            type: "crud",
            recordType: "custom",
            preMessage: "Searching for the incident...",
            postMessage: "Incident details retrieved.",
            inputs: {
                operationName: "lookup",
                table: "incident",
                inputFields: [
                    { name: "incident_number", description: "Incident number", mandatory: false }
                ],
                queryCondition: "number={{incident_number}}",
                returnFields: [
                    { name: "number" },
                    { name: "short_description" },
                    { name: "state" },
                    { name: "priority" },
                    { name: "assigned_to", referenceConfig: { table: "sys_user", field: "name" } }
                ]
            }
        },
        {
            type: "web_automation",
            name: "AIA Web Search",
            active: true,
            preMessage: "Searching the web...",
            postMessage: "Web search results retrieved."
        }
    ],

    triggerConfig: []
});

Complete Workflow Example

import { AiAgenticWorkflow } from "@servicenow/sdk/core";

export const incidentAnalysisWorkflow = AiAgenticWorkflow({
    $id: Now.ID["incident_analysis_workflow"],
    name: "Incident Analysis Workflow",
    description: "Orchestrates two agents to retrieve and analyze incidents.",
    recordType: "custom",

    // Security — auto-generates ACL records (mandatory)
    securityAcl: {
        $id: Now.ID['incident_analysis_workflow_acl'],
        type: 'Specific role',
        roles: [
            '282bf1fac6112285017366cb5f867469',  // itil
            'b05926fa0a0a0aa7000130023e0bde98'   // user
        ]
    },

    // dataAccess required when runAs is omitted (dynamic user identity)
    dataAccess: {
        roleList: [
            '282bf1fac6112285017366cb5f867469',
            'b05926fa0a0a0aa7000130023e0bde98'
        ]
    },

    team: {
        $id: Now.ID["incident_analysis_team"],
        name: "Incident Analysis Team",
        // description is auto-populated from workflow description
        members: [
            "62826bf03710200044e0bfc8bcbe5df1",
            "274b465a7d5f42e581664209557b2b18"
        ]
    },

    versions: [{
        name: "V1",
        number: 1,
        state: "published",
        instructions: `Step 1: Use the Incident Lookup Agent to fetch details.
Step 2: Use the Analysis Agent to examine patterns.
Step 3: Present findings. NEVER modify without user approval.`
    }],

    triggerConfig: [{
        name: "high_priority_incident",
        channel: "Now Assist Panel",
        targetTable: "incident",
        triggerFlowDefinitionType: "record_create",
        triggerCondition: "priority<=2",
        objectiveTemplate: "Analyze high priority incident ${number}",
        showNotifications: true,
        runAsScript: `(function(current) {
            return current.assigned_to || "6816f79cc0a8016401c5a33be04be441";
        })(current);`
    }]
});

Editing Existing Agents/Workflows

Safe Edit Workflow

Locate the .now.ts file
Read the entire current configuration
Identify scope of changes (see Change Impact Matrix)
Apply only the requested changes
Redeploy and verify with run_query

Change Impact Matrix

Change	Also Update
Add CRUD tool	Verify columns, update instructions, check executionMode
Remove tool	Remove instruction references, check dependencies
Change auth mode	Update `securityAcl.type`, add/remove `roles` as needed
Add trigger	Add to `triggerConfig`, verify target table
Add team member (workflow)	Deploy agent first, get sys_id, update instructions
Update instructions	Ensure all referenced tool/agent names still exist

Rollback

Set current published version to state: "withdrawn", set previous version to state: "published", redeploy.

Validation and Enums

Required Fields

Entity	Mandatory Fields
AI Agent	`$id`, `name`, `description`, `agentRole`, `securityAcl`
AI Agentic Workflow	`$id`, `name`, `description`, `securityAcl`, `team.$id`
CRUD tool	`name`, `type`, `inputs.operationName`, `inputs.table`, `inputs.inputFields`
Script tool	`name`, `type`, `script`

Valid Enums

Property	Valid Values
`recordType` (agent)	`"custom"`, `"template"`, `"aia_internal"`, `"promoted"` (default: `"template"`)
`recordType` (workflow)	`"custom"`, `"template"`, `"aia_internal"` (default: `"template"`)
`executionMode` (tool)	`"autopilot"`, `"copilot"`
`executionMode` (workflow)	`"autopilot"`, `"copilot"` (default: `"copilot"`)
`state` (version)	`"draft"`, `"committed"`, `"published"`, `"withdrawn"` (default: `"draft"`)
`tool.type`	`"script"`, `"crud"`, `"capability"`, `"subflow"`, `"action"`, `"catalog"`, `"topic"`, `"topic_block"`, `"web_automation"`, `"rag"`, `"knowledge_graph"`, `"file_upload"`, `"deep_research"`, `"desktop_automation"`, `"mcp"`
`securityAcl.type`	`'Any authenticated user'`, `'Specific role'`, `'Public'`
`agentType`	`"internal"`, `"external"`, `"voice"`, `"aia_internal"`
`channel` (agent)	`"nap"`, `"nap_and_va"` (default: `"nap_and_va"`)
`schedule.triggerStrategy` (agent)	`"every"`, `"once"`, `"unique_changes"`, `"always"`
`schedule.triggerStrategy` (workflow)	`"every"`, `"immediate"`, `"manual"`, `"once"`, `"repeat_every"`, `"unique_changes"`
`outputTransformationStrategy`	`"abstract_summary"`, `"custom"`, `"none"`, `"paraphrase"`, `"summary"`, `"summary_for_search_results"`

Common Hallucinations to Avoid

Wrong	Correct
`"standard"`	`"custom"` (recordType)
`"automatic"`	`"autopilot"` (executionMode)
`"active"`	`"published"` (state)
`"database"`	`"crud"` (tool.type)
`versions` (for agents)	`versionDetails`
`versionDetails` (for workflows)	`versions`
`runAs` (for agents)	`runAsUser`
`"nap"` (for workflow triggers)	`"Now Assist Panel"`
`acl: "..."` (for agents or workflows)	`securityAcl: { $id, type, roles? }` (mandatory for both)
Missing `securityAcl` on workflows	`securityAcl` is mandatory for workflows too, not just agents
`securityAcl: { userAccess: 'dynamic_user' }`	`securityAcl: { $id, type: 'Any authenticated user' \| 'Specific role' \| 'Public' }`
Missing `$id` at workflow top level	Workflows use `$id` just like agents — always include it
`processingMessage` on workflows	Agent-only field — not valid on `AiAgenticWorkflow`
`postProcessingMessage` on workflows	Agent-only field — not valid on `AiAgenticWorkflow`
`team.description` set manually	Auto-populated from workflow `description` — do not set
Manual `inputSchema`	Auto-generated from `inputs` — never set manually
`inputs: {...}` for script tools	`inputs: [...]` (array, not object) for script tools
`dataAccess` omitted when `runAs` absent (workflow)	`dataAccess` is mandatory for workflows when `runAs` is not set

Error Recovery

Error Pattern	Category	Resolution
`dataAccess.roleList is mandatory`	Missing roles	Add `dataAccess.roleList` with role sys_ids (required when `runAsUser`/`runAs` is not set)
`Table not found`	Bad table name	Query `sys_db_object` to verify
`Record not found` / `Invalid reference`	Bad sys_id	Query appropriate table for correct sys_id
`Duplicate name`	Name collision	Query both `sn_aia_agent` and `sn_aia_usecase`
ACL / permission error	ACL misconfiguration	Verify `securityAcl` is set correctly

Database Tables

Table	Purpose
`sn_aia_agent`	AI Agent records
`sn_aia_agent_config`	Agent configuration and settings
`sn_aia_usecase`	AI Agentic Workflow records
`sn_aia_usecase_config_override`	Configuration overrides for workflows
`sn_aia_team`	Team configuration
`sn_aia_team_member`	Team member records
`sn_aia_version`	Version information
`sn_aia_tool`	Tool definitions
`sn_aia_agent_tool_m2m`	Agent-to-tool relationships
`sn_aia_trigger_configuration`	Trigger configuration
`sn_aia_trigger_agent_usecase_m2m`	Trigger-agent-usecase mappings
`sys_agent_access_role_configuration`	Role-based data access controls
`sys_security_acl`	ACL records (auto-generated by `securityAcl`)
`sys_user_role`	Role records

When to Use​

Workflow vs Single Agent Decision Tree​

AI Agent vs AI Agentic Workflow​

Security ACL (securityAcl)​

Access Types​

Execution Identity (runAsUser / dataAccess)​

Role Discovery​

Common Role sys_ids​

Tool Types and Selection​

Selection Priority​

Tool Selection Guide​

inputs Format by Tool Type​

Required Tool Properties​

CRUD Tools​

Operations​

queryCondition Syntax​

Lookup Best Practices​

Script Tools​

Reference-Based Tools​

OOB Tools​

Instructions Authoring​

Three Key Fields​

Writing Principles​

Scaling by Complexity​

Trigger Configuration​

Trigger Types​

Key Differences: Agent vs Workflow Triggers​

Scheduled Trigger Fields​

Run-As Configuration​

ACL Deployment​

Workflow Configuration​

Team Structure​

Workflow-Level Fields​

Deployment Order​

contextProcessingScript​

Complete AI Agent Example​

Complete Workflow Example​

Editing Existing Agents/Workflows​

Safe Edit Workflow​

Change Impact Matrix​

Rollback​

Validation and Enums​

Required Fields​

Valid Enums​

Common Hallucinations to Avoid​

Error Recovery​

Database Tables​