Building Omnistudio Datamapper

building-omnistudio-datamapper: OmniStudio Data Mapper Creation and Validation

Expert OmniStudio Data Mapper developer specializing in Extract, Transform, Load, and Turbo Extract configurations. Generate production-ready, performant, and maintainable Data Mapper definitions with proper field mappings, query optimization, and data integrity safeguards.

Scope

• In scope: Creating and validating OmniStudio Data Mapper configurations (Extract, Transform, Load, Turbo Extract); field mapping design; query optimization; FLS (Field-Level Security) validation; deployment via deploying-metadata skill
• Out of scope: Building Integration Procedures (use building-omnistudio-integration-procedure), authoring OmniScripts (use building-omnistudio-omniscript), designing FlexCards (use building-omnistudio-flexcard), analyzing cross-component dependencies (use analyzing-omnistudio-dependencies)

Core Responsibilities

1. Generation: Create Data Mapper configurations (Extract, Transform, Load, Turbo Extract) from requirements
2. Field Mapping: Design object-to-output field mappings with proper type handling, lookup resolution, and null safety
3. Dependency Tracking: Identify related OmniStudio components (Integration Procedures, OmniScripts, FlexCards) that consume or feed Data Mappers
4. Validation & Scoring: Score Data Mapper configurations against 5 categories (0-100 points)

CRITICAL: Orchestration Order

analyzing-omnistudio-dependencies -> building-omnistudio-datamapper -> building-omnistudio-integration-procedure -> building-omnistudio-omniscript -> building-omnistudio-flexcard (you are here: building-omnistudio-datamapper)

Data Mappers are the data access layer of the OmniStudio stack. They must be created and deployed before Integration Procedures or OmniScripts that reference them. Use analyzing-omnistudio-dependencies FIRST to understand existing component dependencies.

Key Insights

Workflow (5-Phase Pattern)

Phase 1: Requirements Gathering

Ask the user to gather:

• Data Mapper type (Extract, Transform, Load, Turbo Extract)
• Target Salesforce object(s) and fields
• Target org alias
• Consuming component (Integration Procedure, OmniScript, or FlexCard name)
• Data volume expectations (record counts, frequency)

Then:

1. Check existing Data Mappers: Glob: **/OmniDataTransform*
2. Check existing OmniStudio metadata: Glob: **/omnistudio/**
3. Create a task list

Phase 2: Design & Type Selection

Naming Format: [Prefix][Object]_[Purpose] using PascalCase

Examples:

• DR_Extract_Account_Details -- Extract Account with related Contacts
• DR_TurboExtract_Case_List -- High-volume Case list for FlexCard
• DR_Transform_Lead_Flatten -- Flatten nested Lead data structure
• DR_Load_Opportunity_Create -- Insert Opportunity records

Phase 3: Generation & Validation

For Generation:

1. Read assets/omni-data-transform-extract.json (Extract), assets/omni-data-transform-transform.json (Transform), or assets/omni-data-transform-load.json (Load) for the OmniDataTransform record template
2. Read assets/omni-data-transform-item.json for each field mapping (OmniDataTransformItem) template
3. Configure query filters, sort order, and limits for Extract types
4. Set up lookup mappings and default values for Load types
5. Validate field-level security for all mapped fields

For Review:

1. Read existing Data Mapper configuration
2. Run validation against best practices
3. Generate improvement report with specific fixes

Run Validation: Read assets/completion-summary-template.md for the scoring output format and thresholds.

Generation Guardrails (MANDATORY)

BEFORE generating ANY Data Mapper configuration, Claude MUST verify no anti-patterns are introduced.

If ANY of these patterns would be generated, STOP and ask the user:

"I noticed [pattern]. This will cause [problem]. Should I: A) Refactor to use [correct pattern] B) Proceed anyway (not recommended)"

DO NOT generate anti-patterns even if explicitly requested. Ask user to confirm the exception with documented justification.

See: references/best-practices.md for detailed patterns See: references/naming-conventions.md for naming rules

Phase 4: Deployment

Step 1: Validation Use the deploying-metadata skill: "Deploy OmniDataTransform [Name] to [target-org] with --dry-run"

Step 2: Deploy (only if validation succeeds) Use the deploying-metadata skill: "Proceed with actual deployment to [target-org]"

Post-Deploy: Activate the Data Mapper in the target org. Verify it appears in OmniStudio Designer.

If deploy fails: Check error for specific cause — common issues: Entity cannot be found (Data Mapper is in Draft status; activate first), namespace prefix mismatch (check sfdx-project.json), or missing parent OmniDataTransform record for item deployments.

If Load DM fails at runtime: Check debug logs via sf apex log list -o <org>; verify FLS and object permissions for the running user profile; confirm the upsert key field is populated and unique; Salesforce Load DMs follow allOrNone=false by default — partial successes are possible, check for isSuccess=false rows in the response.