--- title: Blueberry: Force Multiplier For The On-Call Engineer description: Instacart built Blueberry, a Slack-native AI reasoning harness for on-call engineers that auto-triages alerts and supports multi-turn investigations. The... canonical: https://daily.dev/posts/blueberry-force-multiplier-for-the-on-call-engineer-jwfisqj6u twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Blueberry: Force Multiplier For The On-Call Engineer | daily.dev og:description: Instacart built Blueberry, a Slack-native AI reasoning harness for on-call engineers that auto-triages alerts and supports multi-turn investigations. The... og:url: https://daily.dev/posts/blueberry-force-multiplier-for-the-on-call-engineer-jwfisqj6u og:image: https://api.daily.dev/og/posts/jWfISqj6u.png og:image:alt: Blueberry: Force Multiplier For The On-Call Engineer og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Blueberry: Force Multiplier For The On-Call Engineer **[Instacart](https://daily.dev/sources/instacart)** · 15 min read · 0 upvotes · 0 comments ## Summary Instacart built Blueberry, a Slack-native AI reasoning harness for on-call engineers that auto-triages alerts and supports multi-turn investigations. The system uses a Postgres-backed durable job queue, three composable Model Context Protocol surfaces (in-process, shared, and team-hosted), and parallel sub-agents to gather historical and live evidence simultaneously. In April 2026, it ran ~25k diagnostic passes across 270+ Slack channels, achieving ~3-minute average time to first insight and ~3-minute theory-testing turnaround with a 99.9% success rate. Key design lessons: harness quality (grounding, specialization, continuity, learning loops) matters more than model quality alone. Teams can contribute custom profiles, runbooks, and MCP endpoints to make tribal knowledge reusable infrastructure. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Instacart Builds Blueberry, an AI-Powered Assistant to Help On-Call Engineers Investigate Incidents](https://daily.dev/posts/instacart-builds-blueberry-an-ai-powered-assistant-to-help-on-call-engineers-investigate-incidents-sylfrprci) · InfoQ · 1 upvotes · 1 comments - [AI Agents at work: real-time platform insights in Slack](https://daily.dev/posts/ai-agents-at-work-real-time-platform-insights-in-slack-as53pzdrz) · monday Engineering · 17 upvotes · 0 comments - [From firefighting to building: How AI agents restored our team’s core productivity](https://daily.dev/posts/from-firefighting-to-building-how-ai-agents-restored-our-team-s-core-productivity-zfyvdslnl) · Grab Tech Blog · 2 upvotes · 0 comments - [Slack AI: The Path to Multi-Cloud](https://daily.dev/posts/slack-ai-the-path-to-multi-cloud-mcgkrjcli) · Slack engineering · 0 upvotes · 0 comments - [How LLMs became Walmart’s on-call engineer](https://daily.dev/posts/how-llms-became-walmart-s-on-call-engineer-rquobieph) · LeadDev · 1 upvotes · 0 comments --- Tags: [#ai-agents](https://daily.dev/tags/ai-agents), [#mcp](https://daily.dev/tags/mcp), [#slack](https://daily.dev/tags/slack) [View this post on daily.dev](https://daily.dev/posts/blueberry-force-multiplier-for-the-on-call-engineer-jwfisqj6u) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Blueberry: Force Multiplier For The On-Call Engineer","url":"https://daily.dev/posts/blueberry-force-multiplier-for-the-on-call-engineer-jwfisqj6u","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/blueberry-force-multiplier-for-the-on-call-engineer-jwfisqj6u"},"datePublished":"2026-07-14T16:41:48.147Z","dateModified":"2026-07-15T12:36:10.121Z","description":"Instacart built Blueberry, a Slack-native AI reasoning harness for on-call engineers that auto-triages alerts and supports multi-turn investigations. 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