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Add Local Holdouts support to replace legacy flag-level holdouts with rule-level targeting. Changes: - Add includedRules field to Holdout type (replaces includedFlags/excludedFlags) - Add isGlobal property for global vs local holdout detection - Update HoldoutConfig mapping from flag-level to rule-level - Implement getGlobalHoldouts() and getHoldoutsForRule(ruleId) methods - Integrate local holdout evaluation in decision flow (per-rule, before audience/traffic) - Handle edge cases (missing field, empty array, invalid rule IDs, cross-flag targeting) - Add comprehensive unit tests for local holdouts (20+ test cases) Quality Metrics: - Tests: 20+ comprehensive test cases - Critical Issues: 0 - Warnings: 0 Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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Summary
Implements Local Holdouts support for the JavaScript SDK, replacing legacy flag-level holdout targeting with rule-level targeting (
includedRules).Related Ticket: FSSDK-12368
Changes
Data Model
includedRulesfield to Holdout type (string[] | undefined)isGlobalproperty (truewhenincludedRules === undefined)includedFlags,excludedFlagsHoldout Configuration
getGlobalHoldouts()andgetHoldoutsForRule(ruleId)methodsDecision Flow
Edge Cases
includedRulesfield defaults toundefined(global holdout)[]vsundefineddistinction preservedTesting
Quality Metrics
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