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alchemy-rate-limits

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Design account-aware Alchemy throttling, bounded retries, and admission control from observed throughput rather than stale plan constants. Use when preventing or handling rate limits. Trigger with "Alchemy rate limit", "Alchemy throughput", or "fix Alchemy 429s".

plugins/saas-packs/alchemy-pack/skills/alchemy-rate-limits/SKILL.md

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# Alchemy Throughput and Backpressure Control

## Overview

Design account-aware Alchemy throttling, bounded retries, and admission control from observed throughput rather than stale plan constants. 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

Alchemy throughput is measured in compute units at the account level using a rolling ten-second token-bucket model. Method costs, plan allowances, and elastic behavior can change. A per-process requests-per-second limiter is therefore insufficient: control must use current account terms, method mix, shared consumers, response signals, and measured demand.
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