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Durable AI Agents

A chat completion forgets everything the moment the request ends. Durable agents don't: they checkpoint progress between steps, park while they wait for human approval, wake on a schedule, and keep memory across sessions. This topic pairs two runtimes — Workflow DevKit patterns for durable step execution (sequential, parallel, evaluator loops, orchestrator-worker) and Eve agents for the full durable lifecycle: tenant-scoped memory, cron-driven digests, and approval-gated operations that resume safely. Start with the simple Eve agent, then add the capability your system is missing.

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Featured patterns

A curated starting point for this topic — open a live preview, then adapt the source.

4 curated
Orchestrator-Worker Workflow Pattern preview
Intermediate

Orchestrator-Worker Workflow Pattern

Demonstrates an orchestrator-worker workflow pattern using Workflow DevKit. Features parallel execution of specialized workers for different change types (create, modify, delete).

generateObjectaiworkflow
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Sequential Workflow Pattern preview
Intermediate

Sequential Workflow Pattern

Demonstrates a sequential workflow pattern using Workflow DevKit. Features step-by-step execution with quality gates and conditional regeneration.

generateObjectgenerateTextai
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Evaluator Workflow Pattern preview
Intermediate

Evaluator Workflow Pattern

Demonstrates an evaluator-optimizer workflow pattern using Workflow DevKit. Features iterative improvement through AI evaluation and optimization loops.

generateObjectgenerateTextai
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Workflow - URL Analysis preview
Beginner

Workflow - URL Analysis

Analyze URLs through AI prompt chaining. Scrapes content, analyzes it, and generates summaries.

streamTextconvertToModelMessagesai
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More patterns

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2 more
01
Parallel Review Workflow PatternDemonstrates a parallel review workflow pattern using Workflow DevKit. Features concurrent code reviews (security, performance, maintainability) with result aggregation.
02
Routing Workflow PatternDemonstrates a routing workflow pattern using Workflow DevKit. Features query classification and conditional routing to specialized handlers based on type and complexity.

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Working orchestration code, not diagrams: routing, sub-agent delegation, parallel fan-out, and orchestrator-worker patterns in TypeScript on the AI SDK. Live previews + full source.

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Give agents real capabilities: tool() definitions with lifecycle hooks, dynamic tools, tool-call repair, web search (Exa, Firecrawl), scraping, PDF ingestion, and human approval gates.

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Complete, running examples for the AI SDK: generateText, streamText, structured output, tool calling, agent loop control, prepareStep, and tool-call repair. Copy the source, keep shipping.

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