Agent-Skills.md

Agent Skills: Mobile Instrumentation Orchestrator

Decision engine and implementation roadmap for sequencing Fullstory mobile SDK instrumentation. Ensures data capture follows the correct sequence (Privacy → Identity → Navigation → Interaction → Diagnostics) across iOS, Android, Flutter, and React Native. Routes to platform-specific SKILL-MOBILE.md files for implementation details.

UncategorizedID: fullstorydev/fs-skills/mobile-instrumentation-orchestrator

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Skill Metadata

Name
mobile-instrumentation-orchestrator
Description
Decision engine and implementation roadmap for sequencing Fullstory mobile SDK instrumentation. Ensures data capture follows the correct sequence (Privacy → Identity → Navigation → Interaction → Diagnostics) across iOS, Android, Flutter, and React Native. Routes to platform-specific SKILL-MOBILE.md files for implementation details.

Mobile Instrumentation Orchestrator

Overview

This skill provides the sequencing logic for mobile Fullstory instrumentation. It answers:

  • When should each API be called?
  • In what order should instrumentation be applied?
  • Which skill provides the implementation details?

The sequence is platform-agnostic—iOS, Android, Flutter, and React Native all follow the same logical flow. For implementation syntax, this skill routes to the appropriate SKILL-MOBILE.md files.

The Implementation Sequence

Instrumentation must follow a specific sequence to ensure data integrity and user privacy:

┌─────────────────────────────────────────────────────────────────────────────┐
│  MOBILE INSTRUMENTATION SEQUENCE                                             │
├─────────────────────────────────────────────────────────────────────────────┤
│                                                                             │
│  [ STAGE 1 ]      [ STAGE 2 ]      [ STAGE 3 ]      [ STAGE 4 ]            │
│     INIT     →       AUTH     →       NAV      →      ACTION               │
│       │                │                │                │                  │
│       v                v                v                v                  │
│  ┌─────────┐     ┌─────────┐     ┌─────────┐     ┌─────────┐              │
│  │ Privacy │     │Identity │     │  Pages  │     │ Events  │              │
│  │ Consent │     │  Users  │     │  Props  │     │  Track  │              │
│  └─────────┘     └─────────┘     └─────────┘     └─────────┘              │
│       │                │                │                │                  │
│       │                │                │                v                  │
│       │                │                │          ┌─────────┐              │
│       │                │                └────────→ │ Stable  │              │
│       │                │                           │Selectors│              │
│       │                │                           └─────────┘              │
│       │                │                                │                   │
│       └────────────────┴────────────────────────────────┼──────────────→   │
│                                                         v                   │
│                                                   ┌─────────┐              │
│                                                   │ Logging │              │
│                                                   │ (Errors)│              │
│                                                   └─────────┘              │
│                                                                             │
└─────────────────────────────────────────────────────────────────────────────┘

Decision Matrix

| Stage | Trigger | Primary Skill | Implementation File | |-------|---------|---------------|---------------------| | 1. Init | App launch | Privacy Controls | fullstory-privacy-controls/SKILL-MOBILE.md | | 1. Init | GDPR/consent required | User Consent | fullstory-user-consent/SKILL-MOBILE.md | | 2. Auth | Successful login | Identify Users | fullstory-identify-users/SKILL-MOBILE.md | | 2. Auth | Logout | Anonymize Users | fullstory-anonymize-users/SKILL-MOBILE.md | | 3. Nav | Screen appears | Page Properties | fullstory-page-properties/SKILL-MOBILE.md | | 3. Nav | Screen disappears | Page Properties | fullstory-page-properties/SKILL-MOBILE.md | | 4. Action | User interaction | Analytics Events | fullstory-analytics-events/SKILL-MOBILE.md | | 4. Action | Element annotation | Stable Selectors | fullstory-stable-selectors/SKILL-MOBILE.md | | Any | Error occurs | Logging | fullstory-logging/SKILL-MOBILE.md | | Any | Sensitive screen | Capture Control | fullstory-capture-control/SKILL-MOBILE.md |

Stage Details

Stage 1: Initialization (App Launch)

When: App starts, before any user data is captured

Purpose: Establish privacy baseline and consent state

Skills to Apply:

  1. Privacy Controls — Set up masking/exclusion for sensitive UI elements
  2. User Consent — If GDPR/CCPA applies, check consent before capture
  3. Capture Control — If needed, start in paused state
┌─────────────────────────────────────────────────────────────────┐
│  STAGE 1: INITIALIZATION CHECKLIST                               │
├─────────────────────────────────────────────────────────────────┤
│  □ Configure SDK initialization                                  │
│  □ Apply privacy classes to sensitive views (fs-mask, fs-exclude)│
│  □ Check consent state (if GDPR/CCPA applies)                   │
│  □ Set capture state based on consent                           │
│  □ DO NOT track events or identify users yet                    │
└─────────────────────────────────────────────────────────────────┘

Implementation: See fullstory-privacy-controls/SKILL-MOBILE.md

Stage 2: Authentication (Login/Logout)

When: User authentication state changes

Purpose: Link sessions to known users

Skills to Apply:

  1. Identify Users — On login success, call identify with user ID
  2. User Properties — Set user attributes (plan, role, etc.)
  3. Anonymize Users — On logout, end the identified session
┌─────────────────────────────────────────────────────────────────┐
│  STAGE 2: AUTHENTICATION CHECKLIST                               │
├─────────────────────────────────────────────────────────────────┤
│  On Login Success:                                               │
│  □ Call identify with user ID (NOT email/PII as UID)            │
│  □ Set user properties (plan, role, account_type)               │
│  □ DO NOT include PII in user properties                        │
│                                                                  │
│  On Logout:                                                      │
│  □ Call anonymize/setIdentity(anonymous: true)                  │
│  □ Clear any cached user state                                  │
└─────────────────────────────────────────────────────────────────┘

Implementation: See fullstory-identify-users/SKILL-MOBILE.md

Stage 3: Navigation (Screen Lifecycle)

When: User navigates between screens

Purpose: Establish page/screen context for all interactions

Skills to Apply:

  1. Pages API — Create Page objects and manage their lifecycle
  2. Page Properties — Set pageName and screen-level properties
  3. Stable Selectors — Ensure screen root has stable identifier

Unlike web applications where Pages are tied to URLs, mobile Pages are defined programmatically. The recipe:

  1. Create a page object
  2. Call start on that page object
  3. Update any properties for that page
  4. Call end on that page object (or it ends when the next page starts)

There can only be one active Page at any time — Pages cannot overlap or be nested. Consider making Dialogs, Overlays, and Alerts into Pages too, especially if they take up the full screen.

┌─────────────────────────────────────────────────────────────────┐
│  STAGE 3: NAVIGATION CHECKLIST                                   │
├─────────────────────────────────────────────────────────────────┤
│  On Screen Appear:                                               │
│  □ Create page object: FS.page(withName: "ScreenName")          │
│  □ Call page.start() to begin the page lifecycle                │
│  □ Set page properties (productId, searchTerm, step, etc.)      │
│  □ Ensure screen root has stable identifier (e.g., "checkout")  │
│                                                                  │
│  On Screen Disappear:                                            │
│  □ Call page.end() explicitly (best practice)                   │
│  □ Events tracked after end should be on NEW page context       │
│                                                                  │
│  For Dialogs/Overlays/Alerts:                                    │
│  □ Consider making full-screen overlays into Pages              │
│  □ Helps provide context of where the user is                   │
│  □ Enhances analytics and troubleshooting                       │
└─────────────────────────────────────────────────────────────────┘

Implementation: See fullstory-page-properties/SKILL-MOBILE.md

Stage 4: Actions (User Interactions)

When: User performs meaningful actions

Purpose: Track business events and ensure element identification

Skills to Apply:

  1. Analytics Events — Track discrete actions (purchases, signups, etc.) with trackEvent
  2. Stable Selectors — Annotate interactive elements using the Data Attributes Guide convention
  3. Data Attributes — Use FS.setAttribute to set data-component, data-id, data-section, data-position, data-state on mobile views
  4. Logging — Track errors that occur during actions

Critical business events that should be tracked as Events (not just via stable selectors):

  • Adding items to cart/bag
  • Purchases
  • Registrations
  • A/B test exposure
  • Feature usage
┌─────────────────────────────────────────────────────────────────┐
│  STAGE 4: ACTIONS CHECKLIST                                      │
├─────────────────────────────────────────────────────────────────┤
│  For Interactive Elements:                                       │
│  □ Add stable identifiers (accessibilityIdentifier, testID, Key)│
│  □ Use component-type.instance-id naming (e.g., "button.add-to-│
│    cart") — see fullstory-stable-selectors/SKILL-MOBILE.md      │
│  □ Use FS.setAttribute for analytics attributes (data-component,│
│    data-id, data-section, data-position, data-state)            │
│                                                                  │
│  For Business Events:                                            │
│  □ Call trackEvent with descriptive name                        │
│  □ Include event-specific properties (quantity, SKU, method)    │
│  □ Events inherit page context and user properties automatically│
│  □ Do NOT include PII in event properties                       │
│                                                                  │
│  For Error Handling:                                             │
│  □ Track errors with FS.log or custom error events              │
│  □ Include error category, NOT full error message (may have PII)│
└─────────────────────────────────────────────────────────────────┘

Implementation:

  • Events: fullstory-analytics-events/SKILL-MOBILE.md
  • Selectors: fullstory-stable-selectors/SKILL-MOBILE.md
  • Errors: fullstory-logging/SKILL-MOBILE.md

Platform-Specific Routing

iOS (Swift/UIKit/SwiftUI)

| Skill | Implementation File | |-------|---------------------| | Privacy Controls | fullstory-privacy-controls/SKILL-MOBILE.md → iOS section | | Identify Users | fullstory-identify-users/SKILL-MOBILE.md → iOS section | | Page Properties | fullstory-page-properties/SKILL-MOBILE.md → iOS section | | Analytics Events | fullstory-analytics-events/SKILL-MOBILE.md → iOS section | | Stable Selectors | fullstory-stable-selectors/SKILL-MOBILE.md → iOS section | | Logging | fullstory-logging/SKILL-MOBILE.md → iOS section |

Android (Kotlin/Java/Compose)

| Skill | Implementation File | |-------|---------------------| | Privacy Controls | fullstory-privacy-controls/SKILL-MOBILE.md → Android section | | Identify Users | fullstory-identify-users/SKILL-MOBILE.md → Android section | | Page Properties | fullstory-page-properties/SKILL-MOBILE.md → Android section | | Analytics Events | fullstory-analytics-events/SKILL-MOBILE.md → Android section | | Stable Selectors | fullstory-stable-selectors/SKILL-MOBILE.md → Android section | | Logging | fullstory-logging/SKILL-MOBILE.md → Android section |

Flutter

| Skill | Implementation File | |-------|---------------------| | Privacy Controls | fullstory-privacy-controls/SKILL-MOBILE.md → Flutter section | | Identify Users | fullstory-identify-users/SKILL-MOBILE.md → Flutter section | | Page Properties | fullstory-page-properties/SKILL-MOBILE.md → Flutter section | | Analytics Events | fullstory-analytics-events/SKILL-MOBILE.md → Flutter section | | Stable Selectors | fullstory-stable-selectors/SKILL-MOBILE.md → Flutter section | | Logging | fullstory-logging/SKILL-MOBILE.md → Flutter section |

React Native

| Skill | Implementation File | |-------|---------------------| | Privacy Controls | fullstory-privacy-controls/SKILL-MOBILE.md → React Native section | | Identify Users | fullstory-identify-users/SKILL-MOBILE.md → React Native section | | Page Properties | fullstory-page-properties/SKILL-MOBILE.md → React Native section | | Analytics Events | fullstory-analytics-events/SKILL-MOBILE.md → React Native section | | Stable Selectors | fullstory-stable-selectors/SKILL-MOBILE.md → React Native section | | Logging | fullstory-logging/SKILL-MOBILE.md → React Native section |

✅ GOOD Implementation: Complete Flow

This example demonstrates the correct sequence for a checkout flow:

USER JOURNEY: Browse → Login → View Product → Add to Cart → Checkout

┌──────────────────────────────────────────────────────────────────────────┐
│ STAGE 1: APP LAUNCH                                                       │
│ ✅ Privacy controls applied to sensitive views                           │
│ ✅ Consent checked (if required)                                         │
│ ✅ SDK initialized                                                       │
└──────────────────────────────────────────────────────────────────────────┘
                                    │
                                    v
┌──────────────────────────────────────────────────────────────────────────┐
│ USER BROWSES (Anonymous)                                                  │
│ ✅ Page properties set for each screen visited                           │
│ ✅ Events tracked (product_viewed, search_performed)                     │
│ ✅ Stable selectors on interactive elements                              │
└──────────────────────────────────────────────────────────────────────────┘
                                    │
                                    v
┌──────────────────────────────────────────────────────────────────────────┐
│ STAGE 2: USER LOGS IN                                                     │
│ ✅ identify(uid: user.id) called on login success                        │
│ ✅ User properties set (plan, role)                                      │
│ ✅ Previous anonymous session merged with identified user                │
└──────────────────────────────────────────────────────────────────────────┘
                                    │
                                    v
┌──────────────────────────────────────────────────────────────────────────┐
│ STAGE 3: PRODUCT DETAIL SCREEN                                            │
│ ✅ pageName = "Product Detail"                                           │
│ ✅ Page properties: productId, productName, price, category              │
│ ✅ Stable selectors: ProductDetail.add-to-cart, ProductDetail.wishlist   │
└──────────────────────────────────────────────────────────────────────────┘
                                    │
                                    v
┌──────────────────────────────────────────────────────────────────────────┐
│ STAGE 4: USER TAPS "ADD TO CART"                                          │
│ ✅ trackEvent("Product Added to Cart", { quantity: 1 })                  │
│ ✅ Event automatically inherits page context (productId, etc.)           │
└──────────────────────────────────────────────────────────────────────────┘
                                    │
                                    v
┌──────────────────────────────────────────────────────────────────────────┐
│ STAGE 3: CHECKOUT SCREEN                                                  │
│ ✅ pageName = "Checkout"                                                 │
│ ✅ Page properties: cartValue, itemCount                                 │
│ ✅ Privacy: Payment fields excluded (fs-exclude)                         │
│ ✅ Stable selectors: Checkout.submit-button                              │
└──────────────────────────────────────────────────────────────────────────┘
                                    │
                                    v
┌──────────────────────────────────────────────────────────────────────────┐
│ STAGE 4: PURCHASE COMPLETED                                               │
│ ✅ trackEvent("Purchase Completed", { orderId, revenue })                │
│ ✅ Error handling: If API fails, log error category (not details)        │
└──────────────────────────────────────────────────────────────────────────┘

❌ BAD Implementation: Out-of-Order Execution

┌──────────────────────────────────────────────────────────────────────────┐
│ ❌ BAD: Tracking event without page context                               │
│                                                                          │
│ // User tapped button, but no page.start() was called                    │
│ FS.track("Button Tapped", { label: "Submit" })                          │
│                                                                          │
│ Problem: Event is "homeless" - no page context, hard to analyze          │
└──────────────────────────────────────────────────────────────────────────┘

┌──────────────────────────────────────────────────────────────────────────┐
│ ❌ BAD: Identifying after events                                          │
│                                                                          │
│ FS.track("Product Viewed", { productId: "123" })  // Anonymous           │
│ FS.track("Added to Cart", { productId: "123" })   // Still anonymous     │
│ // ... later ...                                                         │
│ FS.identify(userId)  // NOW identified, but events already sent          │
│                                                                          │
│ Problem: Early events won't be linked to user                            │
└──────────────────────────────────────────────────────────────────────────┘

┌──────────────────────────────────────────────────────────────────────────┐
│ ❌ BAD: Missing privacy controls                                          │
│                                                                          │
│ // Screen shown with credit card input visible to Fullstory              │
│ FS.setPage("Checkout")                                                   │
│ // fs-exclude NOT applied to payment fields!                             │
│                                                                          │
│ Problem: Sensitive data may be captured                                   │
└──────────────────────────────────────────────────────────────────────────┘

KEY TAKEAWAYS FOR AGENT

Orchestration Rules

  1. Privacy First: Never track anything until privacy masking is applied to sensitive views

  2. Identity Early: Call identify as soon as auth state is confirmed to avoid anonymous session segments

  3. Page Before Events: Every trackEvent should occur within an established page context

  4. Error Safety: Pair every user action tracking with error handling in the catch block

  5. Stable Selectors Always: Every interactive element should have a stable identifier

Questions to Ask Developers

  1. "What platform are you building for?" → Route to correct SKILL-MOBILE.md section
  2. "At what point do you know the user's identity?" → Identify timing
  3. "What screens contain sensitive information?" → Privacy controls
  4. "What are the key user actions you want to track?" → Event planning
  5. "How do you handle errors in your app?" → Error logging strategy

Routing Logic

Developer asks about mobile Fullstory instrumentation
│
├─ "When/how to initialize?" → Stage 1 + privacy-controls/SKILL-MOBILE.md
├─ "When to identify users?" → Stage 2 + identify-users/SKILL-MOBILE.md
├─ "How to track screens?" → Stage 3 + page-properties/SKILL-MOBILE.md
├─ "How to track events?" → Stage 4 + analytics-events/SKILL-MOBILE.md
├─ "How to make elements searchable?" → stable-selectors/SKILL-MOBILE.md
└─ "How to handle errors?" → logging/SKILL-MOBILE.md

REFERENCE LINKS

Core SKILL-MOBILE.md Files

  • Privacy Controls: ../core/fullstory-privacy-controls/SKILL-MOBILE.md
  • Identify Users: ../core/fullstory-identify-users/SKILL-MOBILE.md
  • Page Properties: ../core/fullstory-page-properties/SKILL-MOBILE.md
  • Analytics Events: ../core/fullstory-analytics-events/SKILL-MOBILE.md
  • Logging: ../core/fullstory-logging/SKILL-MOBILE.md
  • Stable Selectors: ../framework/fullstory-stable-selectors/SKILL-MOBILE.md

Fullstory Mobile SDK Documentation

  • iOS: https://developer.fullstory.com/mobile/ios/
  • Android: https://developer.fullstory.com/mobile/android/
  • React Native: https://developer.fullstory.com/mobile/react-native/
  • Flutter: https://developer.fullstory.com/mobile/flutter/

This orchestrator skill provides sequencing logic for mobile instrumentation. For implementation details, see the referenced SKILL-MOBILE.md files.

Mobile Instrumentation Orchestrator Skill | Agent Skills