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alchemy-core-workflow-a

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Design a multi-chain holdings workflow on Alchemy Portfolio APIs with explicit pagination, partial-failure, privacy, and reconciliation contracts. Use when building wallet portfolio views. Trigger with "Alchemy portfolio", "multi-chain token balances", or "wallet holdings dashboard".

skills/.curated/alchemy-core-workflow-a/SKILL.md

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# Alchemy Multi-Chain Portfolio Workflow

## Overview

Design a multi-chain holdings workflow on Alchemy Portfolio APIs with explicit pagination, partial-failure, privacy, and reconciliation contracts. This workflow produces a reviewable artifact and negative-path evidence before any live side effect.

## Prerequisites

- Current first-party Alchemy documentation for the selected product, chain, feature, client, authentication method, limit, and lifecycle.
- Named product, application, security, data/privacy, budget, release, and operations owners appropriate to the requested scope.
- Synthetic or approved non-production fixtures, a credential canary, explicit success criteria, and a tested rollback boundary.

## Current Contract

Portfolio APIs aggregate fungible tokens and NFTs across requested networks. Multi-network fanout can return HTTP 200 while reporting `error.partialErrors`; failed networks can be absent from pagination. Therefore HTTP success is not completeness, and retries for failed networks begin as fresh bounded requests rather than continuing the successful-network cursor.
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