Sf AI Agentscript

SF-AI-AgentScript Skill

"Prompt engineering is like writing laws in poetry - beautiful, but not enforceable."

Agent Script transforms agent development from prompt-based suggestions to code-enforced guarantees. This skill guides you through writing, debugging, testing, and deploying Agentforce agents using the Agent Script DSL.

⚠️ CRITICAL WARNINGS

API & Version Requirements

MANDATORY Pre-Deployment Checks

1. default_agent_user MUST be valid - Query: SELECT Username FROM User WHERE Profile.Name = 'Einstein Agent User' AND IsActive = true
2. No mixed tabs/spaces - Use consistent indentation (2-space, 3-space, or tabs - never mix)
3. Booleans are capitalized - Use True/False, not true/false
4. Exactly one start_agent block - Multiple entry points cause compilation failure

⛔ SYNTAX CONSTRAINTS (Validated via Testing + Official Spec)

🔴 Reserved Field Names (Breaking in Recent Releases)

Common field names that cause parse errors when used as variable or I/O field names:

❌ RESERVED as variable/field names:
description, label, is_required, is_displayable, is_used_by_planner

✅ WORKAROUNDS for variable/field names:
description  → descriptions, description_text, desc_field
label        → label_text, display_label, label_field

Important distinction (TDD v2.2.0): is_required, is_displayable, is_used_by_planner, and label are reserved as variable/field names but are valid as action I/O metadata properties. For example, you cannot name a variable label, but you CAN use label: as a property on an action definition, input, or output. See references/feature-validity.md.

Feature Validity, Data Types & UI Bugs

See references/feature-validity.md for the full TDD v2.2.0 feature validity by context table (which properties work on @utils.transition vs target-backed actions).

See references/complex-data-types.md for the complex_data_type_name mapping table and Agent Script → Lightning type mapping.

Canvas View can silently corrupt syntax (== → {! OPERATOR.EQUAL }, missing colons, de-indentation). Always use Script view for structural edits. Preview Mode has known bugs with linked variables and output property access — see references/known-issues.md for workarounds.

Conditional nesting: else if is NOT valid, nested if inside if/else: is NOT valid (TDD disproved). Use compound if A and B: or flatten to sequential ifs. ... is slot-filling only (for with param=...). Post-action set/run only works on @actions.*, NOT @utils.*. See references/syntax-reference.md for detailed examples.

💰 PRODUCTION GOTCHAS

See references/production-gotchas.md for the full production guide including: credit consumption table, lifecycle hooks (before_reasoning:/after_reasoning: syntax), supervision vs handoff, zero-hallucination routing with is_displayable/is_used_by_planner, action I/O metadata properties (TDD v2.2.0), action chaining, latch variable pattern, loop protection, token limits, progress indicators, VS Code limitations, and language block quirks.

Key highlights:

• Framework operations (@utils.*, if/else, set, lifecycle hooks) are FREE — only Flow/Apex/API actions cost 20 credits each
• before_reasoning:/after_reasoning: content goes directly under the block (NO instructions: wrapper)
• Use is_displayable: False + is_used_by_planner: True on outputs for zero-hallucination routing

Cross-Skill Orchestration

Tip: Open Agentforce Studio list view with sf org open authoring-bundle -o TARGET_ORG (v2.121.7+). Open a specific agent with sf org open agent --api-name MyAgent -o TARGET_ORG.

📋 QUICK REFERENCE: Agent Script Syntax

Block Structure (CORRECTED Order per Official Spec)

config:        # 1. Required: Agent metadata (developer_name, agent_type, default_agent_user)
variables:     # 2. Optional: State management (mutable/linked)
system:        # 3. Required: Global messages and instructions
connection:    # 4. Optional: Escalation routing — use `connection messaging:` (singular, NOT `connections:`)
knowledge:     # 5. Optional: Knowledge base config
language:      # 6. Optional: Locale settings
start_agent:   # 7. Required: Entry point (exactly one)
topic:         # 8. Required: Conversation topics (one or more)

Config Block Field Names (CRITICAL)

# ✅ CORRECT config block:
config:
  developer_name: "my_agent"
  agent_description: "Handles customer support inquiries"
  agent_type: "AgentforceServiceAgent"
  default_agent_user: "agent_user@00dxx000001234.ext"

Naming Rules

• Only letters, numbers, underscores. Must begin with a letter.
• No spaces, no consecutive underscores, cannot end with underscore. Max 80 characters.

Instruction Syntax Patterns

Transition vs Delegation (CRITICAL DISTINCTION)

Expression Operators (Safe Subset)

Variable Types

⚠️ Linked variables CANNOT use object or list types. datetime, time, integer, long are valid for action I/O only — NOT for variables. See references/actions-reference.md for the full type matrix.

Connection Block (Escalation Routing)

⚠️ Service Agents Only. Use connection messaging: (singular, NOT connections:). The outbound_route_name requires flow:// prefix.

# Minimal form (no routing):
connection messaging:
   adaptive_response_allowed: True

# Full form with escalation routing:
connection messaging:
   outbound_route_type: "OmniChannelFlow"
   outbound_route_name: "flow://Route_from_Agent"
   escalation_message: "Connecting you with a specialist."
   adaptive_response_allowed: False

All-or-nothing rule: When outbound_route_type is present, ALL three route properties are required (outbound_route_type, outbound_route_name, escalation_message). Valid channel types: messaging, voice, web.

Two-Level Action System

Level 1: ACTION DEFINITION (in topic's `actions:` block)
   → Has `target:`, `inputs:`, `outputs:`, `description:`

Level 2: ACTION INVOCATION (in `reasoning.actions:` block)
   → References Level 1 via `@actions.name`
   → Specifies HOW to call it (with/set clauses)

For AiAuthoringBundle (Agent Script): flow:// and apex:// targets work directly — no GenAiFunction registration needed. I/O schemas (inputs: + outputs:) are REQUIRED for publish — omitting them causes "Internal Error." See references/actions-reference.md for complete action types, target protocols, I/O name matching rules, and the Bare @InvocableMethod pattern.

🔄 WORKFLOW: Agent Development Lifecycle

Phase 1: Requirements & Design

1. Identify deterministic vs. subjective logic — Deterministic: security checks, thresholds, data lookups. Subjective: greetings, context understanding, NLG.
2. Design FSM architecture — Map topics as states, transitions as edges
3. Define variables — Mutable for state tracking, linked for session context

Phase 2: Agent Script Authoring

1. Create .agent file with required blocks (see Block Structure above)
2. Write topics with instruction resolution pattern: post-action checks at TOP, pre-LLM data loading, dynamic instructions for LLM
3. Configure actions with appropriate target protocols
4. Add available when guards to enforce security deterministically

Phase 3: Validation (LSP + CLI)

AUTOMATIC: LSP validation runs on every Write/Edit to .agent files — catches mixed tabs/spaces, lowercase booleans, missing blocks, invalid default_agent_user, and undefined topic references. Fix errors, re-save, repeat until clean.

# CLI Validation (before deploy):
sf agent validate authoring-bundle --api-name MyAgent -o TARGET_ORG --json

Phase 4: Testing (Delegate to /sf-ai-agentforce-testing)

Batch testing (up to 100 cases), quality metrics (Completeness, Coherence, Topic/Action Assertions), LLM-as-Judge scoring.

Phase 5: Deployment

⚠️ CRITICAL: Use sf agent publish authoring-bundle, NOT sf project deploy start

1. Create bundle directory: force-app/main/default/aiAuthoringBundles/AgentName/
2. Add files: AgentName.agent + AgentName.bundle-meta.xml (NOT .aiAuthoringBundle-meta.xml)
3. Publish: sf agent publish authoring-bundle --api-name AgentName -o TARGET_ORG --json

Phase 5.5: CustomerWebClient Surface Enablement

⚠️ Without CustomerWebClient surface, Agent Builder Preview shows "Something went wrong" and Agent Runtime API returns 500. See references/customer-web-client.md for the required 6-step post-publish patch workflow.

Phase 6: CLI Operations

See references/cli-guide.md for retrieve, validate, publish, and generate commands. Always use --json to suppress spinner output.

Bundle Structure

force-app/main/default/aiAuthoringBundles/MyAgent/
├── MyAgent.agent            # Agent Script file
└── MyAgent.bundle-meta.xml  # NOT .aiAuthoringBundle-meta.xml!

The bundle-meta.xml contains only: <AiAuthoringBundle xmlns="http://soap.sforce.com/2006/04/metadata"><bundleType>AGENT</bundleType></AiAuthoringBundle>

📊 SCORING SYSTEM (100 Points)

See references/scoring-rubric.md for the full 6-category breakdown, rubric details, and score report format.

Quick summary: Structure & Syntax (20), Deterministic Logic (25), Instruction Resolution (20), FSM Architecture (15), Action Configuration (10), Deployment Readiness (10). Score 90+ = deploy with confidence. Score <60 = BLOCK.

🔧 THE 6 DETERMINISTIC BUILDING BLOCKS

These execute as code, not suggestions. The LLM cannot override them.

📐 ARCHITECTURE PATTERNS

See references/architecture-patterns.md for Hub-and-Spoke, Verification Gate, and Post-Action Loop patterns with diagrams and code examples.

Post-Action Loop (most important): Topic re-resolves after action completes — put checks at TOP of instructions: ->.

🐛 DEBUGGING & COMMON ISSUES

See references/debugging-guide.md for the 6 span types (topic_enter, before_reasoning, reasoning, action_call, transition, after_reasoning), trace analysis workflow, and forensic debugging patterns.

Common Issues Quick Reference

Full issue catalog: See references/known-issues.md for 17+ platform bugs and workarounds.

Verification Protocol

When something fails, fetch the relevant canonical URL from references/official-sources.md and verify. See the diagnostic decision tree mapping 6 error categories to specific doc pages.

Self-Improvement

This skill's resource files are editable. When you discover errors, new patterns, or platform bugs during a session — fix them in place. See references/known-issues.md for the issue template.

Deployment Gotchas (Validated by Testing)

Einstein Agent User Format (Org-Specific)

Formats vary: username@orgid.ext (production) or username.suffix@orgfarm.salesforce.com (dev). MANDATORY: Ask user to confirm which Einstein Agent User when creating a new agent.

sf data query -q "SELECT Username FROM User WHERE Profile.Name = 'Einstein Agent User' AND IsActive = true" -o YOUR_TARGET_ORG --json

📚 DOCUMENT MAP (Progressive Disclosure)

Tier 1: Reference Guides (Extracted from this skill)

Tier 2: Resource Guides (Comprehensive)

Tier 3: Quick References (Docs)

Tier 4: Templates

🔗 CROSS-SKILL INTEGRATION

MANDATORY Delegations

Integration Patterns

✅ DEPLOYMENT CHECKLIST

Configuration

• default_agent_user is valid Einstein Agent User
• developer_name uses snake_case (no spaces)

Syntax

• No mixed tabs/spaces
• Booleans use True/False
• Variable names use snake_case

Structure

• Exactly one start_agent block
• At least one topic block
• All transitions reference existing topics

Security

• Critical actions have available when guards
• Session data uses linked variables (not mutable)

Testing

• sf agent validate authoring-bundle --api-name MyAgent -o TARGET_ORG passes
• Preview mode tested before activation

🚀 MINIMAL WORKING EXAMPLE

config:
  developer_name: "simple_agent"
  agent_description: "A minimal working agent example"
  agent_type: "AgentforceServiceAgent"
  default_agent_user: "agent_user@yourorg.com"

system:
  messages:
    welcome: "Hello! How can I help you today?"
    error: "Sorry, something went wrong."
  instructions: "You are a helpful customer service agent."

variables:
  customer_verified: mutable boolean = False

topic main:
  description: "Main conversation handler"
  reasoning:
    instructions: ->
      if @variables.customer_verified == True:
        | You are speaking with a verified customer.
        | Help them with their request.
      else:
        | Please verify the customer's identity first.
    actions:
      verify: @actions.verify_customer
        description: "Verify customer identity"
        set @variables.customer_verified = @outputs.verified

start_agent entry:
  description: "Entry point for all conversations"
  reasoning:
    instructions: |
      Greet the customer and route to the main topic.
    actions:
      go_main: @utils.transition to @topic.main
        description: "Navigate to main conversation"

📖 OFFICIAL RESOURCES

• Agent Script Documentation — Primary reference
• Agent Script Recipes — Official examples
• Atlas Reasoning Engine — Reasoning internals

Full Registry: See references/official-sources.md for 14 primary doc URLs, 8 recipe URLs, diagnostic decision tree, and fallback search patterns.

📚 SOURCES & VERSION HISTORY

See references/sources.md for full source attributions (trailheadapps/agent-script-recipes, @kunello PR #20, aquivalabs/my-org-butler, and more).

See references/version-history.md for the complete changelog from v1.0.0 through v2.2.0.