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6 stacks matching

Knowledge work

Oct 18, 2026

Notion Agent (sixth-generation harness)

Knowledge-work agents and Custom Agents inside Notion, including tasks that can now run for more than 24 hours

Custom Notion Agent harnessQueue-backed worker loopAuto (Notion's model router)Anthropic models

Coding agent

Sep 28, 2026

Replit Agent (model-directed harness)

Replit's production coding agent, whose core loop decides how hard to think, when to hand work off, and which subagent (and model) should do it

Custom Replit Agent harnessGPT-6 Astra (core loop in Max mode, and a production model)Fable 5

Internal engineering platform

Aug 3, 2026

Duolingo's production agent platform

An internal platform so any Duolingo team can define a production agent once and invoke it from Slack, internal sites, a CLI, or another Temporal workflow. In use for fixing CI failures, addressing code-review comments, and a Slack bot for release managers that investigates crashes and summarizes findings

TemporalOpenAI Agents SDKClaude Agents SDKgpt-5.5 (shown in an example agent definition)Models reached through an internal LLM Gateway

SaaS / agent platform

May 25, 2026

ODSEA's LangGraph + Next.js + Supabase production stack

A production platform that 'serves thousands of users' and 'processes AI agent workflows 24 hours a day', documented as a set of public architecture decision records

LangGraphNext.js 15DrizzleClaudeGPT

E-commerce analytics

Aug 14, 2025

LangGraph ecommerce analyst with daily reports (HN)

An AI ecommerce analyst with a report-builder mode and a chatbot: it consumes API data and visitor sessions, builds a large report, and compresses it into actionable insights for online store owners. The report runs once a day per customer.

LangGraphBullMQgpt-5-nano (low reasoning effort, trial users)gpt-5-mini (paying customers)

Customer support

Aug 7, 2025

Intercom Fin

A customer-support AI agent (chat, and in later work email and voice) that Intercom says resolves up to 70% of customers' conversations, with a 99.8% monthly uptime SLA

Custom LLM routing layerBespoke RAGClaude Sonnet 4GPT models (cross-model failover)